lib/file.cpp: Implement cutByte function

Because apparently that’s not the default on NetBSD for some reason.

.gitignore

@@ -4,6 +4,13 @@
 /dependencies/*
 !/dependencies/.placeholder
 
+/include/*
+!/include/.placeholder
+
+.download_cache
+
+.localenv.bashrc
+
 # ignore endianness check
 /.endianness
 /resources/check_endianness
@@ -16,3 +23,5 @@
 
 #vscode
 .vscode
+
+writeTest

Makefile

@@ -1,12 +0,0 @@
-all: build
-build:
-	bash ./scripts/build.sh
-clean:
-	bash ./scripts/clean.sh
-mrproper:
-	bash ./scripts/clean.sh
-	bash ./scripts/clean_dependencies.sh
-setup:
-	bash ./scripts/setup_project.sh
-test:
-	bash ./scripts/test.sh

README.md

@@ -22,13 +22,19 @@ Immediate goals:
 
 ### Prerequisites:
 
-This project requires bash and a C++20 compiler.
+Build dependencies:
 
-The project setup requires wget or curl, gzip, and tar.
+- bash
+- a C++ 20 compiler
 
-Additional requirements for building dependencies:
+Setup dependencies:
 
-- sockpp: a C compiler, CMake
+- wget or curl
+- gzip
+- sha256sum (or NetBSD's sha256, hashalot's sha256 will not work)
+- tar
+- a C compiler (for sockpp)
+- CMake (for sockpp)
 
 **For people using other shells than bash:** You need to at least have bash
 installed to use the scripts, but using it as your shell while working on
@@ -45,7 +51,9 @@ point to `bin/lib`.
 - `git clone` this repository
 - if using bash:
   - `source` the file `setupenv.bashrc` from the project's base directory
-    to load the provided shell environment
+    to load the provided shell environment (local customizations to the
+    environment can be placed in a fiile `.localenv.bashrc` in the project's
+    root directory if necessary)
   - `setup_project`
 - if not using bash or not using the provided environment:
   - `cd` to the project's base directory

code_style.md

@@ -48,11 +48,6 @@ universally used.
 Use explicitly sized data types where possible.
 For example, use `int32_t` instead of `int`.
 
-When coming up with names, refer to data types by category and size.
-For example, refer to double precision floating point numbers as `float64`
-instead of `double`.
-
-
 ## Shell Script
 
 Use the hash bang `#!/usr/bin/env bash`.

copyright_notice_template

@@ -1,5 +1,8 @@
 Copyright <year>, FOSS-VG Developers and Contributers
 
+Author(s):
+  <names or pseudonyms here>
+
 This program is free software: you can redistribute it and/or modify it
 under the terms of the GNU Affero General Public License as published
 by the Free Software Foundation, version 3.

doc/build_system.md

@@ -24,11 +24,15 @@ Provided aliases:
 
 ## setup_project
 
-Cleans the project and its dependencies first, ensuring the project is in
-a known state, then downloads and extracts dependencies.
+Cleans the project and its dependencies first (see below), ensuring
+the project is in a known state, then sets up dependencies.
 
-This will probably do more in the future (for example compile dependencies
-that need to be compiled).
+This includes downloading (and caching) of files that are not yet
+locally cached and compiling dependencies that need to be compiled.
+
+This script’s intended purpose is setting up a development environment but
+it can also be used to update the locally set-up dependencies to the ones
+that the project is using.
 
 
 # build
@@ -55,14 +59,37 @@ Accepted environment variables:
 - `CXX`: override the default compiler
 - `CXXFLAGS`: override the default compiler flags, must at least specify
    the C++ version
+- `SINGLE`: if set to `yes`, causes the test script to compile the tests in
+   single-threaded mode¹
+
+¹Unit tests are always run one after the other.
 
 
 # clean
 
-Removes and re-creates `bin/`. Also removes the endianness header and
-the endianness check binary.
+Removes and re-creates `bin/` and `include/`, then re-creates symlinks to
+shared object and header files as needed for the build process.
+Also removes the endianness header and the endianness check binary.
 
 
 # clean_dependencies
 
-Removes and re-creates `dependencies/`.
+Removes and re-creates `dependencies/` and prunes the download cache of files
+that either have been corrupted or are no longer used.
+
+# lib
+
+This is not a script you are supposed to run. It's a library that contains
+some functions for the other scripts to work properly on all platforms.
+
+Features it provides:
+
+- `$WAIT_ANYWAY`: a variable containing the `wait` command if `SINGLE=yes`
+is set.
+- `$CXX_WITH_FLAGS`: deals with `CXX` and `CXXFLAGS` environment variables
+so it can be used as a generic compiler command
+- function `check_sha256`: deals with `sha256sum` and NetBSD's `sha256`
+- function `remove`: better verbosity
+- function `create_directory`: alternative to `mkdir -v` because that's not
+available on some systems
+- function `create_file`: the same but for files

resources/README.md

@@ -23,11 +23,11 @@ A simple tool written in Java that takes an input as UTF-8 and outputs it in Jav
 Usage example: `echo -ne "\x00" | java JavaStringGenerator > output_file`
 
 
-## servers.dat
+## NBT_data
 
-My current servers.dat as pulled from my Minecraft installation. Used for testing the NBT library until we have something better.
+Data used to test the NBT library.
 
-
-## servers.dat_nbt_decoded.txt
-
-The same file manually decoded. I did this to get a better understanding how NBT works, might come in handy in the future.
+`servers.dat`: My current servers.dat as pulled from my Minecraft installation
+`servers.dat_nbt_decoded.txt`: The same file manually decoded (I did this to get a better understanding how NBT works, might come in handy in the future.)
+`simple_nbt`: A simple NBT file containing all tags
+`nested_compounds_and_lists`: A combination of nested compound and list tags intended to be challenging to parse

resources/dumpnbt_output_format

@@ -0,0 +1,354 @@
+#############################################################################
+# Examples for all types of tags:                                           #
+#############################################################################
+
+[0: End]:
+|–Header: 1 byte
+|–Payload: 0 bytes
+'–Total: 1 byte
+
+[0: 8 Bit Integer] name:
+|–Header: 7 bytes
+|–Payload: 1 byte
+|–Total: 8 bytes
+'–Value: 0
+
+[0: 16 Bit Integer] name:
+|–Header: 7 bytes
+|–Payload: 2 bytes
+|–Total: 9 bytes
+'–Value: 0
+
+[0: 32 Bit Integer] name:
+|–Header: 7 bytes
+|–Payload: 4 bytes
+|–Total: 11 bytes
+'–Value: 0
+
+[0: 64 Bit Integer] name:
+|–Header: 7 bytes
+|–Payload: 8 bytes
+|–Total: 15 bytes
+'–Value: 0
+
+[0: Float] name:
+|–Header: 7 bytes
+|–Payload: 4 bytes
+|–Total: 11 bytes
+'–Value: 0
+
+[0: Double] name:
+|–Header: 7 bytes
+|–Payload: 8 bytes
+|–Total: 15 bytes
+'–Value: 0
+
+[0: Array of 8 Bit Integers] name:
+|–Header: 7 bytes
+|–Payload: 7 bytes
+|–Total: 14 bytes
+|–Length: 3
+'–Values:
+  |–0
+  |–0
+  '–0
+
+[0: String] name:
+|–Header: 7 bytes
+|–Payload: 14 bytes
+|–Total: 21 bytes
+'–Value: Hello World!
+
+[0: List] name:
+|–Header: 7 bytes
+|–Payload: 8 bytes
+|–Total: 15 bytes
+|–Contained Type: 8 Bit Integer
+|–Length: 3
+|
+|–[12: 8 Bit Integer]:
+| |–Payload: 1 byte
+| |–Total: 1 byte
+| '–Value: 0
+|
+|–[13: 8 Bit Integer]:
+| |–Payload: 1 byte
+| |–Total: 1 byte
+| '–Value: 0
+|
+'–[14: 8 Bit Integer]:
+  |–Payload: 1 byte
+  |–Total: 1 byte
+  '–Value: 0
+
+[0: Compound] name:
+|–Header: 7 bytes
+|–Payload: 25 bytes
+|–Total: 32 bytes
+|–Length: 4
+|
+|–[7: 8 Bit Integer] name:
+| |–Header: 7 bytes
+| |–Payload: 1 byte
+| |–Total: 8 bytes
+| '–Value: 0
+|
+|–[15: 8 Bit Integer] name:
+| |–Header: 7 bytes
+| |–Payload: 1 byte
+| |–Total: 8 bytes
+| '–Value: 0
+|
+|–[23: 8 Bit Integer] name:
+| |–Header: 7 bytes
+| |–Payload: 1 byte
+| |–Total: 8 bytes
+| '–Value: 0
+|
+'–[31: End]:
+  |–Header: 1 byte
+  |–Payload: 0 bytes
+  '–Total: 1 byte
+
+[0: Array of 32 Bit Integers] name:
+|–Header: 7 bytes
+|–Payload: 16 bytes
+|–Total: 23 bytes
+|–Length: 3
+'–Values:
+  |–0
+  |–0
+  '–0
+
+[0: Array of 64 Bit Integers] name:
+|–Header: 7 bytes
+|–Payload: 28 bytes
+|–Total: 35 bytes
+|–Length: 3
+'–Values:
+  |–0
+  |–0
+  '–0
+
+#############################################################################
+# Output for simple_nbt (what it's supposed to look like)                   #
+#############################################################################
+
+[0: Compound]:
+|–Header: 3 bytes
+|–Payload: 475 bytes
+|–Total: 478 bytes
+|–Length: 15
+|
+|–[3: String] Spaces and special characters are allowed in tag names, right?:
+| |–Header: 65 bytes
+| |–Payload: 24 bytes
+| |–Total: 89 bytes
+| '–Value: Idk. Let’s find out.
+|
+|–[92: Compound] compound:
+| |–Header: 11 bytes
+| |–Payload: 45 bytes
+| |–Total: 56 bytes
+| |–Length: 3
+| |
+| |–[103: 32 Bit Integer] some_number:
+| | |–Header: 14 bytes
+| | |–Payload: 4 bytes
+| | |–Total: 18 bytes
+| | '–Value: -754506943
+| |
+| |–[121: String] some_text:
+| | |–Header: 12 bytes
+| | |–Payload: 14 bytes
+| | |–Total: 26 bytes
+| | '–Value: eat a cookie
+| |
+| '–[147: End]:
+|   |–Header: 1 byte
+|   |–Payload: 0 bytes
+|   '–Total: 1 byte
+|
+|–[148: Double] double:
+| |–Header: 9 bytes
+| |–Payload: 8 bytes
+| |–Total: 17 bytes
+| '–Value: 623593.6542742235
+|
+|–[165: Float] float:
+| |–Header: 8 bytes
+| |–Payload: 4 bytes
+| |–Total: 12 bytes
+| '–Value: 35.2678337097168
+|
+|–[177: 16 Bit Integer] int16:
+| |–Header: 8 bytes
+| |–Payload: 2 bytes
+| |–Total: 10 bytes
+| '–Value: 2000
+|
+|–[187: 32 Bit Integer] int32:
+| |–Header: 8 bytes
+| |–Payload: 4 bytes
+| |–Total: 12 bytes
+| '–Value: 10101010
+|
+|–[199: Array of 32 Bit Integers] int32_array:
+| |–Header: 14 bytes
+| |–Payload: 20 bytes
+| |–Total: 34 bytes
+| |–Length: 4
+| '–Values:
+|   |–398452796
+|   |–43259
+|   |–2147483647
+|   '–1634890337
+|
+|–[233: 64 Bit Integer] int64:
+| |–Header: 8 bytes
+| |–Payload: 8 bytes
+| |–Total: 16 bytes
+| '–Value: 810001800766
+|
+|–[249: Array of 64 Bit Integers] int64_array:
+| |–Header: 14 bytes
+| |–Payload: 44 bytes
+| |–Total: 58 bytes
+| |–Length: 5
+| '–Values:
+|   |–239865
+|   |–23586749
+|   |–9223372036854775807
+|   |–188944201329624
+|   '–3116157694992754
+|
+|–[307: 8 Bit Integer] int8:
+| |–Header: 7 bytes
+| |–Payload: 1 byte
+| |–Total: 8 bytes
+| '–Value: 100
+|
+|–[315: Array of 8 Bit Integers] int8_array:
+| |–Header: 13 bytes
+| |–Payload: 12 bytes
+| |–Total: 25 bytes
+| |–Length: 8
+| '–Values:
+|   |–113
+|   |–53
+|   |–119
+|   |–98
+|   |–84
+|   |–100
+|   |–245
+|   '–50
+|
+|–[340: List] list_int8:
+| |–Header: 12 bytes
+| |–Payload: 10 bytes
+| |–Total: 22 bytes
+| |–Contained Type: 8 Bit Integer
+| |–Length: 5
+| |
+| |–[357: 8 Bit Integer]:
+| | |–Payload: 1 byte
+| | |–Total: 1 byte
+| | '–Value: 65
+| |
+| |–[358: 8 Bit Integer]:
+| | |–Payload: 1 byte
+| | |–Total: 1 byte
+| | '–Value: 96
+| |
+| |–[359: 8 Bit Integer]:
+| | |–Payload: 1 byte
+| | |–Total: 1 byte
+| | '–Value: 78
+| |
+| |–[360: 8 Bit Integer]:
+| | |–Payload: 1 byte
+| | |–Total: 1 byte
+| | '–Value: 127
+| |
+| '–[361: 8 Bit Integer]:
+|   |–Payload: 1 byte
+|   |–Total: 1 byte
+|   '–Value: -6
+|
+|–[362: List] list_strings:
+| |–Header: 15 bytes
+| |–Payload: 77 bytes
+| |–Total: 92 bytes
+| |–Contained Type: String
+| |–Length: 12
+| |
+| |–[382: String]:
+| | |–Payload: 8 bytes
+| | |–Total: 8 bytes
+| | '–Value: Pacman
+| |
+| |–[390: String]:
+| | |–Payload: 5 bytes
+| | |–Total: 5 bytes
+| | '–Value: ate
+| |
+| |–[395: String]:
+| | |–Payload: 5 bytes
+| | |–Total: 5 bytes
+| | '–Value: all
+| |
+| |–[400: String]:
+| | |–Payload: 5 bytes
+| | |–Total: 5 bytes
+| | '–Value: the
+| |
+| |–[405: String]:
+| | |–Payload: 6 bytes
+| | |–Total: 6 bytes
+| | '–Value: dots
+| |
+| |–[411: String]:
+| | |–Payload: 4 bytes
+| | |–Total: 4 bytes
+| | '–Value: so
+| |
+| |–[415: String]:
+| | |–Payload: 5 bytes
+| | |–Total: 5 bytes
+| | '–Value: now
+| |
+| |–[420: String]:
+| | |–Payload: 8 bytes
+| | |–Total: 8 bytes
+| | '–Value: he’s
+| |
+| |–[428: String]:
+| | |–Payload: 8 bytes
+| | |–Total: 8 bytes
+| | '–Value: coming
+| |
+| |–[436: String]:
+| | |–Payload: 5 bytes
+| | |–Total: 5 bytes
+| | '–Value: for
+| |
+| |–[441: String]:
+| | |–Payload: 5 bytes
+| | |–Total: 5 bytes
+| | '–Value: the
+| |
+| '–[446: String]:
+|   |–Payload: 8 bytes
+|   |–Total: 8 bytes
+|   '–Value: words.
+|
+|–[454: String] string:
+| |–Header: 9 bytes
+| |–Payload: 14 bytes
+| |–Total: 23 bytes
+| '–Value: Hello World!
+|
+'–[477: End]:
+  |–Header: 1 byte
+  |–Payload: 0 bytes
+  '–Total: 1 byte

scripts/build.sh

@@ -15,20 +15,7 @@
 # version 3 along with this program.
 # If not, see https://www.gnu.org/licenses/agpl-3.0.en.html
 
-if [ "$(tr '[:upper:]' '[:lower:]' <<< $SINGLE)" = "yes" ]; then
-    echo "Running build script in single-threaded mode."
-    WAIT_ANYWAY="wait"
-else
-    WAIT_ANYWAY=""
-fi
-
-if [ -z "$CXX" ]; then
-    CXX="c++"
-fi
-if [ -z "$CXXFLAGS" ]; then
-    CXXFLAGS="-std=c++20 -Wall"
-fi
-CXX_WITH_FLAGS="$CXX $CXXFLAGS"
+source scripts/lib.sh
 
 # if unknown, figure out endianness
 if [ -f .endianness ]; then
@@ -46,10 +33,10 @@ fi
 
 # `.cpp` files in src/lib will be automatically picked up and compiled into
 # dynamically linked libraries.
-echo "Building libs..."
-mkdir -pv bin/lib
+echo ">>> Building libs..."
+create_directory bin/lib
 for lib in $(find ./src/lib -name "*.cpp"); do
-    COMPILE_COMMAND="$CXX_WITH_FLAGS -I dependencies/tiny-utf8-4.4.3/include -fPIC -shared -o $(sed -e 's/^.\/src/.\/bin/;s/cpp$/so/' <<< $lib) $lib"
+    COMPILE_COMMAND="$CXX_WITH_FLAGS -I ./include -fPIC -shared -o $(sed -e 's/^.\/src/.\/bin/;s/cpp$/so/' <<< $lib) $lib"
     echo $COMPILE_COMMAND
     $COMPILE_COMMAND &
     $WAIT_ANYWAY
@@ -68,12 +55,14 @@ wait
 # How to run a tool: specify the library path to use for the dynamic linker
 #   when running a program
 # Example: LD_LIBRARY_PATH=bin/lib bin/tools/dumpnbt
-echo "Building tools..."
-mkdir -pv bin/tools
+echo ">>> Building tools..."
+create_directory bin/tools
 # add compile commands to this array
 COMPILE_COMMANDS=(
-    "$CXX_WITH_FLAGS src/tools/dumpnbt.cpp -Lbin/lib -l:nbt.so -o bin/tools/dumpnbt"
-    "$CXX_WITH_FLAGS src/tools/hexnet.cpp -Lbin/lib -l:cli.so -l:libsockpp.so -Idependencies/sockpp-0.7.1/include -o bin/tools/hexnet"
+    "$CXX_WITH_FLAGS src/tools/dumpnbt.cpp -I./include -Lbin/lib -l:nbt.so -l:javacompat.so -l:cli.so -o bin/tools/dumpnbt"
+    "$CXX_WITH_FLAGS src/tools/arraydump.cpp -I./include -Lbin/lib -l:file.so -l:cli.so -o bin/tools/arraydump"
+    "$CXX_WITH_FLAGS src/tools/baseconvert.cpp -I./include -Lbin/lib -l:cli.so -o bin/tools/baseconvert"
+    "$CXX_WITH_FLAGS -pthread src/tools/hexnet.cpp -I./include -Lbin/lib -l:cli.so -l:libsockpp.so -o bin/tools/hexnet"
 )
 for command in ${!COMPILE_COMMANDS[@]}; do
     echo "${COMPILE_COMMANDS[command]}"

scripts/clean.sh

@@ -15,15 +15,24 @@
 # version 3 along with this program.
 # If not, see https://www.gnu.org/licenses/agpl-3.0.en.html
 
-rm -rv ./bin
-rm -vf .endianness
-rm -vf resources/check_endianness
-mkdir -v ./bin
-mkdir -v ./bin/lib
+echo ">>> Cleaning build files..."
+
+source scripts/lib.sh
+
+remove ./bin
+remove ./include
+remove .endianness
+remove resources/check_endianness
+create_directory ./bin
+create_directory ./bin/lib
+create_directory ./include
 
 ln -vs ../../dependencies/sockpp-0.7.1/build/libsockpp.so bin/lib/
 ln -vs ../../dependencies/sockpp-0.7.1/build/libsockpp.so.0 bin/lib/
 ln -vs ../../dependencies/sockpp-0.7.1/build/libsockpp.so.0.7.1 bin/lib/
 
-set -v
-echo -n "" > ./bin/.placeholder
+ln -vs ../dependencies/sockpp-0.7.1/include/sockpp/ ./include/
+ln -vs ../dependencies/tiny-utf8-4.4.3/include/tinyutf8/ ./include/
+
+create_file ./bin/.placeholder
+create_file ./include/.placeholder

scripts/clean_dependencies.sh

@@ -15,7 +15,26 @@
 # version 3 along with this program.
 # If not, see https://www.gnu.org/licenses/agpl-3.0.en.html
 
-rm -rv ./dependencies
-mkdir -v ./dependencies
-set -v
-echo -n "" > ./dependencies/.placeholder
+source scripts/lib.sh
+
+echo ">>> Checking download cache for unneeded or corrupted files..."
+for file in $(ls .download_cache); do
+    #TODO: remove if unknown shasum
+    if grep $file scripts/setup_project.sh >/dev/null 2>&1; then
+        if check_sha256 ".download_cache/$file" "$file"; then
+            echo -n "."
+        else
+            echo -n "!"
+            rm ".download_cache/$file"
+        fi
+    else
+        echo -n "x"
+        rm ".download_cache/$file"
+    fi
+done
+echo "
+>>> Cleaning dependencies..."
+
+remove ./dependencies
+create_directory ./dependencies
+create_file ./dependencies/.placeholder

scripts/lib.sh

@@ -0,0 +1,78 @@
+#!/bin/echo You are not supposed to run this file.
+
+# Copyright 2022, FOSS-VG Developers and Contributers
+#
+# This program is free software: you can redistribute it and/or modify it
+# under the terms of the GNU Affero General Public License as published
+# by the Free Software Foundation, version 3.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied
+# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# version 3 along with this program.
+# If not, see https://www.gnu.org/licenses/agpl-3.0.en.html
+
+if [ "$(tr '[:upper:]' '[:lower:]' <<< $SINGLE)" = "yes" ]; then
+    echo "Single-threaded mode enabled."
+    WAIT_ANYWAY="wait"
+else
+    WAIT_ANYWAY=""
+fi
+
+if [ -z "$CXX" ]; then
+    CXX="c++"
+fi
+if [ -z "$CXXFLAGS" ]; then
+    CXXFLAGS="-std=c++20 -Wall -Wextra"
+fi
+CXX_WITH_FLAGS="$CXX $CXXFLAGS"
+
+# automatically find and use an appropriate sha256 sum command
+# currently supports sha256sum and NetBSD's sha256
+if command -v sha256sum > /dev/null; then
+    function check_sha256 {
+        FILE="$1"
+        CHECKSUM="$2"
+        sha256sum --check <<< "$CHECKSUM *$FILE" >/dev/null 2>&1
+        return $?
+    }
+else
+    if command -v sha256 > /dev/null; then
+        function check_sha256 {
+            FILE="$1"
+            CHECKSUM="$2"
+            sha256 -c <<< "SHA256 ($FILE) = $CHECKSUM" >/dev/null 2>&1
+            return $?
+        }
+    else
+        echo "Could not find sha256sum or sha256."
+        exit 1
+    fi
+fi
+
+# This function exists to make the output more sensible on platforms where
+# `rm -v` only prints the names of the removed things instead of a more
+# comprehensible message like "removing NAME".
+function remove {
+    echo "Removing $1..."
+    if [ -d "$1" ]; then
+        rm -rv "$1"
+    else
+        rm -v "$1"
+    fi
+}
+
+# some platforms don’t support `mkdir -v`
+function create_directory {
+    echo "Creating directory: $1"
+    mkdir -p "$1"
+}
+
+# `mkfile -v` if you will
+function create_file {
+    echo "Creating file: $1"
+    touch "$1"
+}

scripts/setup_project.sh

@@ -15,6 +15,8 @@
 # version 3 along with this program.
 # If not, see https://www.gnu.org/licenses/agpl-3.0.en.html
 
+source scripts/lib.sh
+
 echo -n "Wget or curl? "
 if command -v wget >/dev/null 2>&1; then
     USE_WGET=yes
@@ -32,53 +34,67 @@ fi
 function download {
     URL="$1"
     DESTINATION="$2"
-    SHA256SUM="$3 *$2"
+    SHA256SUM="$3"
+
+    if [ ! -d .download_cache ]; then
+        echo "Cache directory missing."
+        create_directory .download_cache
+    fi
+
+    if [ -f ".download_cache/$SHA256SUM" ]; then
+        if check_sha256 ".download_cache/$SHA256SUM" "$SHA256SUM"; then
+            echo "Using locally cached file for $DESTINATION"
+            cp ".download_cache/$SHA256SUM" "$DESTINATION"
+            return 0
+        else
+            echo "Locally cached file for $DESTINATION is corrupted."
+            rm ".download_cache/$SHA256SUM"
+            download "$URL" "$DESTINATION" "$SHA256SUM"
+            return $?
+        fi
+    else
         echo -n "Downloading $URL to $DESTINATION... "
         if [ $USE_WGET = yes ]; then
-        wget -O "$DESTINATION" "$URL" >/dev/null 2>&1
+            wget -O ".download_cache/$SHA256SUM" "$URL" >/dev/null 2>&1
         else
-        curl -L "$URL" --output "$DESTINATION" >/dev/null 2>&1
+            curl -L "$URL" --output ".download_cache/$SHA256SUM" >/dev/null 2>&1
         fi
-    if sha256sum --check <<< $SHA256SUM >/dev/null 2>&1; then
+        if check_sha256 ".download_cache/$SHA256SUM" "$SHA256SUM"; then
+            cp ".download_cache/$SHA256SUM" "$DESTINATION"
             echo "done."
             return 0
         else
             echo "error."
-        echo "Checksum verification failed. Your download is either corrupted or the file has been altered."
-        rm -v "$DESTINATION"
+            echo "Checksum verification failed. Your download is either corrupted or the file has been altered. Removing file."
+            rm ".download_cache/$SHA256SUM"
             return 1
         fi
+    fi
 }
 
-echo "Cleaning build files..."
 scripts/clean.sh
-echo "Cleaning dependencies..."
 scripts/clean_dependencies.sh
 
 set -e # failures are not acceptable here
-mkdir -v dependencies/tmp
+create_directory dependencies/tmp
 download https://github.com/DuffsDevice/tiny-utf8/archive/refs/tags/v4.4.3.tar.gz dependencies/tmp/tiny-utf8.tar.gz 8e3f61651909c9f3105d3501932a96aa65733127fb6e7cf94cb1b0a2dff42c8f
 download https://github.com/fpagliughi/sockpp/archive/refs/tags/v0.7.1.tar.gz dependencies/tmp/sockpp.tar.gz 2e023528bebbd2ac083fc91fbe6d5c4158c3336bedbcff48f594f3b28f53b940
-#TODO: keep the files somewhere else as a cache and only download the ones
-#      we don't have or that got corrupted
-#TODO: once we cache files properly, have clean_dependencies.sh prune
-#      unknown files from the cache (for example old versions
-#      of dependencies)
 
-echo -n "Extracting tiny-utf8... "
+echo -n ">>> Extracting tiny-utf8... "
 gzip -d dependencies/tmp/tiny-utf8.tar.gz
 tar -xf dependencies/tmp/tiny-utf8.tar -C dependencies
-echo "done."
+echo "done"
 
-echo -n "Extracting sockpp... "
+echo -n ">>> Extracting sockpp... "
 gzip -d dependencies/tmp/sockpp.tar.gz
 tar -xf dependencies/tmp/sockpp.tar -C dependencies
-echo "done."
-echo -n "Building sockpp... "
+echo "done"
+
+echo ">>> Building sockpp... "
 pushd dependencies/sockpp-0.7.1/ >/dev/null 2>&1
 cmake -Bbuild .
 cmake --build build
 popd >/dev/null 2>&1
-echo "done."
 
-rm -rv dependencies/tmp
+echo ">>> Cleaning up..."
+remove dependencies/tmp

scripts/test.sh

@@ -15,13 +15,7 @@
 # version 3 along with this program.
 # If not, see https://www.gnu.org/licenses/agpl-3.0.en.html
 
-if [ -z "$CXX" ]; then
-    CXX="c++"
-fi
-if [ -z "$CXXFLAGS" ]; then
-    CXXFLAGS="-std=c++20 -Wall"
-fi
-CXX_WITH_FLAGS="$CXX $CXXFLAGS"
+source scripts/lib.sh
 
 echo -n "Using LD_LIBRARY_PATH "
 if [ -z "$LD_LIBRARY_PATH" ]; then
@@ -31,25 +25,38 @@ else
 fi
 echo "$LD_LIBRARY_PATH"
 
-mkdir -pv bin/test
+echo ">>> Cleaning tests..."
+remove bin/test
+create_directory bin/test
 
-echo "Building tests..."
+echo ">>> Building tests..."
 
 # add compile commands to this array
 COMPILE_COMMANDS=(
-    "$CXX_WITH_FLAGS src/test/nbt_helpers.cpp -Lbin/lib -l:nbt.so -o bin/test/nbt_helpers"
+    "$CXX_WITH_FLAGS src/test/nbt_read_write_helpers.cpp -I./include -Lbin/lib -l:nbt.so -l:javacompat.so -o bin/test/nbt_read_write_helpers"
     "$CXX_WITH_FLAGS src/test/cli_argument_parser.cpp -Lbin/lib -l:cli.so -o bin/test/cli_argument_parser"
-    "$CXX_WITH_FLAGS src/test/javacompat.cpp -Idependencies/tiny-utf8-4.4.3/include -Lbin/lib -l:javacompat.so -o bin/test/javacompat"
+    "$CXX_WITH_FLAGS src/test/javacompat.cpp -I./include -Lbin/lib -l:javacompat.so -o bin/test/javacompat"
+    "$CXX_WITH_FLAGS src/test/nbt_tags.cpp -I./include -Lbin/lib -l:nbt.so -l:javacompat.so -o bin/test/nbt_tags"
+    "$CXX_WITH_FLAGS src/test/nbt_size_helpers.cpp -I./include -Lbin/lib -l:nbt.so -l:javacompat.so -o bin/test/nbt_size_helpers"
+    "$CXX_WITH_FLAGS src/test/file.cpp -I./include -Lbin/lib -l:file.so -o bin/test/file"
 )
 for command in ${!COMPILE_COMMANDS[@]}; do
     echo "${COMPILE_COMMANDS[command]}"
     ${COMPILE_COMMANDS[command]} &
+    $WAIT_ANYWAY
 done
 
 wait
 
-echo "Running tests..."
+echo ">>> Running tests..."
+
+# explicitly allow commands to fail at this stage
+set +e
 
 for test in $(ls bin/test); do
     bin/test/$test
 done
+
+for test in $(ls scripts/test); do
+    scripts/test/$test
+done

scripts/test/arraydump.sh

@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+echo "================================================================================"
+echo -n "Testing \`arraydump\`... "
+[ -x bin/tools/arraydump ] \
+&& [ "$(bin/tools/arraydump resources/all_bytes)" = "{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 254, 255}" ] \
+&& [ "$(bin/tools/arraydump --hexadecimal resources/all_bytes)" = "{0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff}" ] \
+&& [ "$(bin/tools/arraydump --octal resources/all_bytes)" = "{0000, 0001, 0002, 0003, 0004, 0005, 0006, 0007, 0010, 0011, 0012, 0013, 0014, 0015, 0016, 0017, 0020, 0021, 0022, 0023, 0024, 0025, 0026, 0027, 0030, 0031, 0032, 0033, 0034, 0035, 0036, 0037, 0040, 0041, 0042, 0043, 0044, 0045, 0046, 0047, 0050, 0051, 0052, 0053, 0054, 0055, 0056, 0057, 0060, 0061, 0062, 0063, 0064, 0065, 0066, 0067, 0070, 0071, 0072, 0073, 0074, 0075, 0076, 0077, 0100, 0101, 0102, 0103, 0104, 0105, 0106, 0107, 0110, 0111, 0112, 0113, 0114, 0115, 0116, 0117, 0120, 0121, 0122, 0123, 0124, 0125, 0126, 0127, 0130, 0131, 0132, 0133, 0134, 0135, 0136, 0137, 0140, 0141, 0142, 0143, 0144, 0145, 0146, 0147, 0150, 0151, 0152, 0153, 0154, 0155, 0156, 0157, 0160, 0161, 0162, 0163, 0164, 0165, 0166, 0167, 0170, 0171, 0172, 0173, 0174, 0175, 0176, 0177, 0200, 0201, 0202, 0203, 0204, 0205, 0206, 0207, 0210, 0211, 0212, 0213, 0214, 0215, 0216, 0217, 0220, 0221, 0222, 0223, 0224, 0225, 0226, 0227, 0230, 0231, 0232, 0233, 0234, 0235, 0236, 0237, 0240, 0241, 0242, 0243, 0244, 0245, 0246, 0247, 0250, 0251, 0252, 0253, 0254, 0255, 0256, 0257, 0260, 0261, 0262, 0263, 0264, 0265, 0266, 0267, 0270, 0271, 0272, 0273, 0274, 0275, 0276, 0277, 0300, 0301, 0302, 0303, 0304, 0305, 0306, 0307, 0310, 0311, 0312, 0313, 0314, 0315, 0316, 0317, 0320, 0321, 0322, 0323, 0324, 0325, 0326, 0327, 0330, 0331, 0332, 0333, 0334, 0335, 0336, 0337, 0340, 0341, 0342, 0343, 0344, 0345, 0346, 0347, 0350, 0351, 0352, 0353, 0354, 0355, 0356, 0357, 0360, 0361, 0362, 0363, 0364, 0365, 0366, 0367, 0370, 0371, 0372, 0373, 0374, 0375, 0376, 0377}" ] \
+&& [ "$(bin/tools/arraydump --binary resources/all_bytes)" = "{0b00000000, 0b00000001, 0b00000010, 0b00000011, 0b00000100, 0b00000101, 0b00000110, 0b00000111, 0b00001000, 0b00001001, 0b00001010, 0b00001011, 0b00001100, 0b00001101, 0b00001110, 0b00001111, 0b00010000, 0b00010001, 0b00010010, 0b00010011, 0b00010100, 0b00010101, 0b00010110, 0b00010111, 0b00011000, 0b00011001, 0b00011010, 0b00011011, 0b00011100, 0b00011101, 0b00011110, 0b00011111, 0b00100000, 0b00100001, 0b00100010, 0b00100011, 0b00100100, 0b00100101, 0b00100110, 0b00100111, 0b00101000, 0b00101001, 0b00101010, 0b00101011, 0b00101100, 0b00101101, 0b00101110, 0b00101111, 0b00110000, 0b00110001, 0b00110010, 0b00110011, 0b00110100, 0b00110101, 0b00110110, 0b00110111, 0b00111000, 0b00111001, 0b00111010, 0b00111011, 0b00111100, 0b00111101, 0b00111110, 0b00111111, 0b01000000, 0b01000001, 0b01000010, 0b01000011, 0b01000100, 0b01000101, 0b01000110, 0b01000111, 0b01001000, 0b01001001, 0b01001010, 0b01001011, 0b01001100, 0b01001101, 0b01001110, 0b01001111, 0b01010000, 0b01010001, 0b01010010, 0b01010011, 0b01010100, 0b01010101, 0b01010110, 0b01010111, 0b01011000, 0b01011001, 0b01011010, 0b01011011, 0b01011100, 0b01011101, 0b01011110, 0b01011111, 0b01100000, 0b01100001, 0b01100010, 0b01100011, 0b01100100, 0b01100101, 0b01100110, 0b01100111, 0b01101000, 0b01101001, 0b01101010, 0b01101011, 0b01101100, 0b01101101, 0b01101110, 0b01101111, 0b01110000, 0b01110001, 0b01110010, 0b01110011, 0b01110100, 0b01110101, 0b01110110, 0b01110111, 0b01111000, 0b01111001, 0b01111010, 0b01111011, 0b01111100, 0b01111101, 0b01111110, 0b01111111, 0b10000000, 0b10000001, 0b10000010, 0b10000011, 0b10000100, 0b10000101, 0b10000110, 0b10000111, 0b10001000, 0b10001001, 0b10001010, 0b10001011, 0b10001100, 0b10001101, 0b10001110, 0b10001111, 0b10010000, 0b10010001, 0b10010010, 0b10010011, 0b10010100, 0b10010101, 0b10010110, 0b10010111, 0b10011000, 0b10011001, 0b10011010, 0b10011011, 0b10011100, 0b10011101, 0b10011110, 0b10011111, 0b10100000, 0b10100001, 0b10100010, 0b10100011, 0b10100100, 0b10100101, 0b10100110, 0b10100111, 0b10101000, 0b10101001, 0b10101010, 0b10101011, 0b10101100, 0b10101101, 0b10101110, 0b10101111, 0b10110000, 0b10110001, 0b10110010, 0b10110011, 0b10110100, 0b10110101, 0b10110110, 0b10110111, 0b10111000, 0b10111001, 0b10111010, 0b10111011, 0b10111100, 0b10111101, 0b10111110, 0b10111111, 0b11000000, 0b11000001, 0b11000010, 0b11000011, 0b11000100, 0b11000101, 0b11000110, 0b11000111, 0b11001000, 0b11001001, 0b11001010, 0b11001011, 0b11001100, 0b11001101, 0b11001110, 0b11001111, 0b11010000, 0b11010001, 0b11010010, 0b11010011, 0b11010100, 0b11010101, 0b11010110, 0b11010111, 0b11011000, 0b11011001, 0b11011010, 0b11011011, 0b11011100, 0b11011101, 0b11011110, 0b11011111, 0b11100000, 0b11100001, 0b11100010, 0b11100011, 0b11100100, 0b11100101, 0b11100110, 0b11100111, 0b11101000, 0b11101001, 0b11101010, 0b11101011, 0b11101100, 0b11101101, 0b11101110, 0b11101111, 0b11110000, 0b11110001, 0b11110010, 0b11110011, 0b11110100, 0b11110101, 0b11110110, 0b11110111, 0b11111000, 0b11111001, 0b11111010, 0b11111011, 0b11111100, 0b11111101, 0b11111110, 0b11111111}" ] \
+&& echo "PASS" \
+|| echo "FAIL"
+echo "================================================================================"

scripts/test/baseconvert.sh

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+echo "================================================================================"
+echo -n "Testing \`baseconvert\`... "
+
+   [ $(baseconvert -d "0xFFFFFFFFFFFFFFFF") = "18446744073709551615" ] \
+&& [ $(baseconvert -x "0xFFFFFFFFFFFFFFFF") = "0xffffffffffffffff" ] \
+&& [ $(baseconvert -o "0xFFFFFFFFFFFFFFFF") = "01777777777777777777777" ] \
+&& [ $(baseconvert -b "0xFFFFFFFFFFFFFFFF") = "0b1111111111111111111111111111111111111111111111111111111111111111" ] \
+&& [ $(baseconvert -x "0XFFFFFFFFFFFFFFFF") = "0xffffffffffffffff" ] \
+&& [ $(baseconvert -d "0") = "0" ] \
+&& [ $(baseconvert -x "0") = "0x0" ] \
+&& [ $(baseconvert -o "0") = "0" ] \
+&& [ $(baseconvert -b "0") = "0b0" ] \
+&& [ $(baseconvert -b "4") = "0b100" ] \
+&& [ $(baseconvert -x "07777" ) = "0xfff" ] \
+&& [ $(baseconvert -x "0o7777" ) = "0xfff" ] \
+&& [ $(baseconvert -x "0O7777" ) = "0xfff" ] \
+&& [ $(baseconvert -o "0b1000" ) = "010" ] \
+&& [ $(baseconvert -o "0B1000" ) = "010" ] \
+&& echo "PASS" \
+|| echo "FAIL"
+echo "================================================================================"

scripts/test/hexnet.sh

@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+
+# Copyright 2022, FOSS-VG Developers and Contributers
+#
+# This program is free software: you can redistribute it and/or modify it
+# under the terms of the GNU Affero General Public License as published
+# by the Free Software Foundation, version 3.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied
+# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# version 3 along with this program.
+# If not, see https://www.gnu.org/licenses/agpl-3.0.en.html
+
+echo "################################################################################
+Testing hexnet
+################################################################################"
+
+echo "Test not yet implemented."
+#TODO: implement unit test after merging back with master

setupenv.bashrc

@@ -13,9 +13,15 @@
 # version 3 along with this program.
 # If not, see https://www.gnu.org/licenses/agpl-3.0.en.html
 
-echo -n "Loading shell environment for FOSS-VG development... "
+echo ">>> Loading shell environment for FOSS-VG development..."
 
 PROJECT_BASE_DIR="$( cd -- "$(dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1 ; pwd -P )"
+echo "Project base directory is $PROJECT_BASE_DIR"
+
+if [ -f "$PROJECT_BASE_DIR/.localenv.bashrc" ]; then
+    source "$PROJECT_BASE_DIR/.localenv.bashrc"
+    echo "Applied local environment customizations."
+fi
 
 alias clean="pushd \"$PROJECT_BASE_DIR\" >/dev/null 2>&1; scripts/clean.sh; popd >/dev/null 2>&1"
 alias clean_dependencies="pushd \"$PROJECT_BASE_DIR\" >/dev/null 2>&1; scripts/clean_dependencies.sh; popd >/dev/null 2>&1"
@@ -33,13 +39,75 @@ function build {
     popd >/dev/null 2>&1
 }
 
+echo "Added aliases and functions."
+
+export PATH="$PROJECT_BASE_DIR/bin/tools:$PROJECT_BASE_DIR/scripts/tools:$PATH"
+echo "PATH is $PATH"
 
 if [ -z "$LD_LIBRARY_PATH" ]; then
     export LD_LIBRARY_PATH="$PROJECT_BASE_DIR"/bin/lib
 else
     export LD_LIBRARY_PATH="$PROJECT_BASE_DIR"/bin/lib:"$LD_LIBRARY_PATH"
 fi
+echo "LD_LIBRARY_PATH is $LD_LIBRARY_PATH"
 
-unset PROJECT_BASE_DIR
+echo ">>> Checking for dependencies..."
+MISSING_DEPS=0
 
-echo "done."
+if command -v wget > /dev/null 2>&1; then
+    true
+else
+    if command -v curl > /dev/null 2>&1; then
+        true
+    else
+        echo "WARNING: \`wget\` or \`curl\` is needed to download some additional dependencies."
+        MISSING_DEPS=1
+    fi
+fi
+
+if command -v sha256sum > /dev/null 2>&1; then
+    true
+else
+    if command -v sha256 > /dev/null 2>&1; then
+        true
+    else
+        echo "WARNING: Coreutils \`sha256sum\` or a \`sha256\` as found on NetBSD is needed to verify downloaded files."
+        MISSING_DEPS=1
+    fi
+fi
+
+if command -v gzip > /dev/null 2>&1; then
+    true
+else
+    echo "WARNING: \`gzip\` is needed to decompress downloaded dependencies."
+    MISSING_DEPS=1
+fi
+
+if command -v tar > /dev/null 2>&1; then
+    true
+else
+    echo "WARNING: \`tar\` is needed to unpack downloaded dependencies."
+    MISSING_DEPS=1
+fi
+
+if command -v cmake > /dev/null 2>&1; then
+    true
+else
+    echo "WARNING: \`cmake\` is needed to build downloaded dependencies."
+    MISSING_DEPS=1
+fi
+
+if [ -z "$CXX" ]; then
+    if command -v c++ > /dev/null 2>&1; then
+        true
+    else
+        echo "WARNING: Your system does not appear to have a standard C++ compiler. If you have a C++ compiler installed, but not linked to \`c++\` on your PATH, set it manually using \`CXX=/path/to/your/compiler\`."
+        MISSING_DEPS=1
+    fi
+fi
+
+if [ "$MISSING_DEPS" -eq 0 ]; then
+    echo "All set."
+fi
+
+unset MISSING_DEPS

src/lib/cli.cpp

@@ -1,5 +1,8 @@
 // Copyright 2022, FOSS-VG Developers and Contributers
 //
+// Author(s):
+//  BodgeMaster, Shwoomple
+//
 // This program is free software: you can redistribute it and/or modify it
 // under the terms of the GNU Affero General Public License as published
 // by the Free Software Foundation, version 3.
@@ -13,13 +16,12 @@
 // version 3 along with this program.
 // If not, see https://www.gnu.org/licenses/agpl-3.0.en.html
 
-#include "cli.h++"
-
 #include <string>
 #include <vector>
 #include <map>
 
-#include "error.h++"
+#include "cli.hpp"
+#include "error.hpp"
 
 namespace CLI {
     Flag::Flag() {
@@ -32,10 +34,10 @@ namespace CLI {
         this->present = false;
     }
 
-    UnpositionalArgument::UnpositionalArgument() {
+    Option::Option() {
         this->present = false;
     }
-    UnpositionalArgument::UnpositionalArgument(char shortName, std::string longName, std::string placeholder, std::string description) {
+    Option::Option(char shortName, std::string longName, std::string placeholder, std::string description) {
         this->shortName = shortName;
         this->longName = longName;
         this->description = description;
@@ -43,23 +45,22 @@ namespace CLI {
         this->present = false;
     }
 
-    PositionalArgument::PositionalArgument() {
+    Argument::Argument() {
         this->present = false;
     }
-    PositionalArgument::PositionalArgument(std::string placeholder, std::string description) {
+    Argument::Argument(std::string placeholder, std::string description) {
         this->description = description;
         this->placeholder = placeholder;
         this->present = false;
     }
 
     // using int here bc that's how main() is defined
-    ArgumentsParser::ArgumentsParser(int argc, const char* const argv[], std::vector<Flag> flags, std::vector<UnpositionalArgument> unpositionalArguments, std::vector<PositionalArgument> positionalArguments) {
+    ArgumentsParser::ArgumentsParser(int argc, const char* const argv[], std::vector<Flag> flags, std::vector<Option> options, std::vector<Argument> arguments) {
         this->wrongUsage = false;
         this->wrongUsageMessages = std::vector<std::string>();
         this->programName = std::string(argv[0]);
-        this->positionalArguments = positionalArguments;
-        // create lookup tables for all flags and unpositional arguments
-        // by their names
+        this->arguments = arguments;
+        // create lookup tables for all flags and options by their names
         this->flagsByShortName = std::map<char, Flag*>();
         this->flagsByLongName  = std::map<std::string, Flag*>();
         for (Flag flag: flags) {
@@ -68,25 +69,25 @@ namespace CLI {
             this->flagsByShortName[flag.shortName] = flagPointer;
             this->flagsByLongName[flag.longName]   = flagPointer;
         }
-        this->argumentsByShortName = std::map<char, UnpositionalArgument*>();
-        this->argumentsByLongName = std::map<std::string, UnpositionalArgument*>();
-        for (UnpositionalArgument unpositionalArgument: unpositionalArguments) {
-            UnpositionalArgument* argumentPointer = new UnpositionalArgument();
-            *argumentPointer = unpositionalArgument;
-            this->argumentsByShortName[unpositionalArgument.shortName] = argumentPointer;
-            this->argumentsByLongName[unpositionalArgument.longName]   = argumentPointer;
+        this->optionsByShortName = std::map<char, Option*>();
+        this->optionsByLongName = std::map<std::string, Option*>();
+        for (Option option: options) {
+            Option* optionPointer = new Option();
+            *optionPointer = option;
+            this->optionsByShortName[option.shortName] = optionPointer;
+            this->optionsByLongName[option.longName]   = optionPointer;
         }
 
-        UnpositionalArgument* argumentWaitingForValue = nullptr;
-        std::vector<CLI::PositionalArgument>::size_type positionalArgumentCounter = 0;
+        Option* optionWaitingForValue = nullptr;
+        std::vector<CLI::Argument>::size_type argumentCounter = 0;
         for (int i=1; i<argc; i++) {
             std::string argument(argv[i]);
             if (argument[0]=='-') {
                 // do we have unfinished business?
-                if (argumentWaitingForValue!=nullptr) {
+                if (optionWaitingForValue!=nullptr) {
                     this->wrongUsage = true;
-                    this->wrongUsageMessages.push_back(std::string("Argument expects value but has none: ")+argumentWaitingForValue->longName);
-                    argumentWaitingForValue = nullptr;
+                    this->wrongUsageMessages.push_back(std::string("Argument expects value but has none: ")+optionWaitingForValue->longName);
+                    optionWaitingForValue = nullptr;
                 }
                 // long name or short name?
                 if (argument[1]=='-') {
@@ -98,15 +99,19 @@ namespace CLI {
                     auto position = argument.find("=");
                     if (position==std::string::npos) {
                         // no =value
-                        //is argument or flag?
+                        //is option or flag?
                         std::string argumentName = argument.substr(2,argument.length()-2);
                         if (flagsByLongName.contains(argumentName)) {
                             // flag
                             flagsByLongName[argumentName]->present = true;
-                        } else if (argumentsByLongName.contains(argumentName)) {
-                            // unpositional argument
-                            argumentsByLongName[argumentName]->present = true;
-                            argumentWaitingForValue = argumentsByLongName[argumentName];
+                        } else if (optionsByLongName.contains(argumentName)) {
+                            // option
+                            optionsByLongName[argumentName]->present = true;
+                            optionWaitingForValue = optionsByLongName[argumentName];
+                            if (i+1 == argc) {
+                                this->wrongUsage = true;
+                                this->wrongUsageMessages.push_back(std::string("Argument expects value but has none: ")+argumentName);
+                            }
                         } else {
                             this->wrongUsage = true;
                             this->wrongUsageMessages.push_back(std::string("Unknown argument or flag: ")+argument);
@@ -115,9 +120,9 @@ namespace CLI {
                         // has =value
                         std::string value = argument.substr(position+1, argument.length()-position-1);
                         std::string argumentName = argument.substr(2, position-2);
-                        if (argumentsByLongName.contains(argumentName)) {
-                            argumentsByLongName[argumentName]->present = true;
-                            argumentsByLongName[argumentName]->value = value;
+                        if (optionsByLongName.contains(argumentName)) {
+                            optionsByLongName[argumentName]->present = true;
+                            optionsByLongName[argumentName]->value = value;
                         } else {
                             this->wrongUsage = true;
                             this->wrongUsageMessages.push_back(std::string("Unknown argument (or it's a flag that doesn't take a value): ")+argument);
@@ -129,23 +134,29 @@ namespace CLI {
                     // length is defined as
                     // (std::__cxx11::basic_string<char>::size_type ?)
                     // starting at 1 because 0 is '-'
-                    for (int i=1; i<(int) argument.length(); i++) {
-                        //is argument or flag?
-                        if (flagsByShortName.contains(argument[i])) {
-                            flagsByShortName[argument[i]]->present = true;
-                        } else if (argumentsByShortName.contains(argument[i])) {
-                            argumentsByShortName[argument[i]]->present = true;
+                    for (int j=1; j<(int) argument.length(); j++) {
+                        // is option or flag?
+                        if (flagsByShortName.contains(argument[j])) {
+                            // flag
+                            flagsByShortName[argument[j]]->present = true;
+                        } else if (optionsByShortName.contains(argument[j])) {
+                            // option
+                            optionsByShortName[argument[j]]->present = true;
                             //FIXME: see above
-                            if (i+1==(int) argument.length()) {
-                                argumentWaitingForValue = argumentsByShortName[argument[i]];
+                            if (j+1==(int) argument.length()) {
+                                optionWaitingForValue = optionsByShortName[argument[j]];
+                                if (i+1 == argc) {
+                                    this->wrongUsage = true;
+                                    this->wrongUsageMessages.push_back(std::string("Argument expects value but has none: ")+this->optionsByShortName[argument[j]]->longName);
+                                }
                             } else {
                                 //assume the rest of the argv is a concatenated argument value
-                                argumentsByShortName[argument[i]]->value = argument.substr(i+1, argument.length()-i-1);
+                                optionsByShortName[argument[j]]->value = argument.substr(j+1, argument.length()-j-1);
                                 break;
                             }
                         } else {
                             this->wrongUsage = true;
-                            this->wrongUsageMessages.push_back(std::string("Unknown argument or flag(s): ")+argument.substr(i, argument.length()-i));
+                            this->wrongUsageMessages.push_back(std::string("Unknown argument or flag(s): ")+argument.substr(j, argument.length()-j));
                             // err on the side of caution to ensure that
                             // no unwanted options get activated on programs
                             // that deal gracefully with unrecognized command
@@ -155,39 +166,48 @@ namespace CLI {
                     }
                 }
             } else {
-                // positional argument or value for unpositional arg?
-                if (argumentWaitingForValue==nullptr) {
-                    // positional argument
-                    if (positionalArgumentCounter < this->positionalArguments.size()) {
-                        this->positionalArguments.at(positionalArgumentCounter).present = true;
-                        this->positionalArguments.at(positionalArgumentCounter).value = argument;
+                // argument or value for option?
+                if (optionWaitingForValue==nullptr) {
+                    // argument
+                    if (argumentCounter < this->arguments.size()) {
+                        this->arguments.at(argumentCounter).present = true;
+                        this->arguments.at(argumentCounter).value = argument;
                     } else {
                         this->wrongUsage = true;
-                        this->wrongUsageMessages.push_back(std::string("Too many positional arguments. Unexpected encounter of: ")+argument);
+                        this->wrongUsageMessages.push_back(std::string("Too many arguments! Unexpected encounter of: ")+argument);
                     }
-                    positionalArgumentCounter++;
+                    argumentCounter++;
                 } else {
-                    // value for unpositional argument
-                    argumentWaitingForValue->value = argument;
-                    argumentWaitingForValue = nullptr;
+                    // value for option
+                    optionWaitingForValue->value = argument;
+                    optionWaitingForValue = nullptr;
                 }
             }
         }
-        for (PositionalArgument const& positionalArgument: this->positionalArguments) {
-            if (!positionalArgument.present) {
+        for (Argument const& argument: this->arguments) {
+            if (!argument.present) {
                 this->wrongUsage = true;
-                this->wrongUsageMessages.push_back(std::string("Too few positional arguments! Missing: ")+positionalArgument.placeholder);
+                this->wrongUsageMessages.push_back(std::string("Too few arguments! Missing: ")+argument.placeholder);
             }
         }
     }
 
+    ArgumentsParser::ArgumentsParser(int argc, const char* const argv[], std::vector<Flag> flags, std::vector<Option> options, std::vector<Argument> arguments, std::string description): ArgumentsParser::ArgumentsParser(argc, argv, flags, options, arguments) {
+        this->description = description;
+    }
+
+    ArgumentsParser::ArgumentsParser(int argc, const char* const argv[], std::vector<Flag> flags, std::vector<Option> options, std::vector<Argument> arguments, std::string description, std::string additionalInfo): ArgumentsParser::ArgumentsParser(argc, argv, flags, options, arguments) {
+        this->description = description;
+        this->additionalInfo = additionalInfo;
+    }
+
     ArgumentsParser::~ArgumentsParser() {
         //TODO: check that this actually runs
         for (auto const& [shortName, flag]: this->flagsByShortName) {
             delete flag;
         }
-        for (auto const& [shortName, unpositionalArgument]: this->argumentsByShortName) {
-            delete unpositionalArgument;
+        for (auto const& [shortName, option]: this->optionsByShortName) {
+            delete option;
         }
     }
 
@@ -211,35 +231,100 @@ namespace CLI {
         else return ErrorOr<bool> (false, ErrorCodes::NOT_PRESENT, false);
     }
 
-    ErrorOr<std::string> ArgumentsParser::getPositionalArgument(std::vector<CLI::PositionalArgument>::size_type position){
-        if (position >= this->positionalArguments.size()) return ErrorOr<std::string>(true, ErrorCodes::OUT_OF_RANGE, std::string(""));
+    ErrorOr<std::string> ArgumentsParser::getArgument(std::vector<CLI::Argument>::size_type position){
+        if (position >= this->arguments.size()) return ErrorOr<std::string>(true, ErrorCodes::OUT_OF_RANGE, std::string(""));
         if (this->wrongUsage) {
-            if (this->positionalArguments.at(position).present) return ErrorOr<std::string>(true, ErrorCodes::WRONG_USAGE, this->positionalArguments.at(position).value);
+            if (this->arguments.at(position).present) return ErrorOr<std::string>(true, ErrorCodes::WRONG_USAGE, this->arguments.at(position).value);
             else return ErrorOr<std::string>(true, ErrorCodes::NOT_PRESENT, std::string(""));
         }
-        return ErrorOr<std::string>(this->positionalArguments.at(position).value);
+        return ErrorOr<std::string>(this->arguments.at(position).value);
     }
 
-    ErrorOr<std::string> ArgumentsParser::getUnpositionalArgument(char shortName) {
-        if (!this->argumentsByShortName.contains(shortName)) return ErrorOr<std::string>(true, ErrorCodes::UNKNOWN_KEY, std::string(""));
+    ErrorOr<std::string> ArgumentsParser::getOption(char shortName) {
+        if (!this->optionsByShortName.contains(shortName)) return ErrorOr<std::string>(true, ErrorCodes::UNKNOWN_KEY, std::string(""));
         if (this->wrongUsage) {
-            if (this->argumentsByShortName[shortName]->present) return ErrorOr<std::string>(true, ErrorCodes::WRONG_USAGE, this->argumentsByShortName[shortName]->value);
+            if (this->optionsByShortName[shortName]->present) return ErrorOr<std::string>(true, ErrorCodes::WRONG_USAGE, this->optionsByShortName[shortName]->value);
             else return ErrorOr<std::string>(true, ErrorCodes::NOT_PRESENT, std::string(""));
         }
-        if (this->argumentsByShortName[shortName]->present) return ErrorOr<std::string>(this->argumentsByShortName[shortName]->value);
+        if (this->optionsByShortName[shortName]->present) return ErrorOr<std::string>(this->optionsByShortName[shortName]->value);
         // argument is not present, but this is not an error -> false, NOT_PRESENT, ""
         else return ErrorOr<std::string>(false, ErrorCodes::NOT_PRESENT, std::string(""));
     }
 
-    ErrorOr<std::string> ArgumentsParser::getUnpositionalArgument(std::string longName) {
-        if (!this->argumentsByLongName.contains(longName)) return ErrorOr<std::string>(true, ErrorCodes::UNKNOWN_KEY, std::string(""));
+    ErrorOr<std::string> ArgumentsParser::getOption(std::string longName) {
+        if (!this->optionsByLongName.contains(longName)) return ErrorOr<std::string>(true, ErrorCodes::UNKNOWN_KEY, std::string(""));
         if (this->wrongUsage) {
-            if (this->argumentsByLongName[longName]->present) return ErrorOr<std::string>(true, ErrorCodes::WRONG_USAGE, this->argumentsByLongName[longName]->value);
+            if (this->optionsByLongName[longName]->present) return ErrorOr<std::string>(true, ErrorCodes::WRONG_USAGE, this->optionsByLongName[longName]->value);
             else return ErrorOr<std::string>(true, ErrorCodes::NOT_PRESENT, std::string(""));
         }
-        if (this->argumentsByLongName[longName]->present) return ErrorOr<std::string>(this->argumentsByLongName[longName]->value);
+        if (this->optionsByLongName[longName]->present) return ErrorOr<std::string>(this->optionsByLongName[longName]->value);
         // argument is not present, but this is not an error -> false, NOT_PRESENT, ""
         else return ErrorOr<std::string>(false, ErrorCodes::NOT_PRESENT, std::string(""));
     }
-    //std::string ArgumentsParser::getUsage();
+
+    std::string ArgumentsParser::getUsage(){
+        std::string usageString = "";
+        if (this->description != "") {
+            usageString += "Help: " + this->programName + "\n\n\t" + this->description + "\n\n";
+        }
+        usageString += "Usage: " + this->programName + " ";
+
+        if(!this->flagsByShortName.empty()){
+            usageString += "[-";
+        }
+
+        for(const auto& [key, value]: this->flagsByShortName){
+            usageString.push_back(key);
+        }
+
+        if(!this->flagsByShortName.empty()){
+            usageString += "] ";
+        }
+
+        for(const auto& [key, value]: this->optionsByShortName){
+            usageString += "[-";
+            usageString.push_back(key);
+            usageString += " " + value->placeholder + "] ";
+        }
+
+        for(const auto& argument: this->arguments){
+            usageString += argument.placeholder + " ";
+        }
+
+        usageString.push_back('\n');
+
+        if(!this->flagsByShortName.empty()){
+            usageString += "\nFlags:\n";
+
+            for(const auto& [key, value]: this->flagsByShortName){
+                usageString += "\t-";
+                usageString.push_back(key);
+                usageString += ", --" + value->longName + "\n\t\t" + value->description + "\n";
+            }
+        }
+
+        if(!this->optionsByShortName.empty()){
+            usageString += "\nOptions:\n";
+
+            for(const auto& [key, value]: this->optionsByShortName){
+                usageString += "\t-";
+                usageString.push_back(key);
+                usageString += " " + value->placeholder + ", --" + value->longName + "=" + value->placeholder + "\n\t\t" + value->description + "\n";
+            }
+        }
+
+        if(!this->arguments.empty()){
+            usageString += "\nArguments:\n";
+
+            for(const auto& argument: this->arguments){
+                usageString += "\t" + argument.placeholder + "\n\t\t" + argument.description + "\n";
+            }
+        }
+
+        if (this->additionalInfo != "") {
+            usageString += "\nAdditional Info:\n\n\t" + this->additionalInfo + "\n";
+        }
+
+        return usageString;
+    }
 }

src/lib/cli.hpp

@@ -19,7 +19,7 @@
 #include <vector>
 #include <map>
 
-#include "error.h++"
+#include "error.hpp"
 
 namespace CLI {
 
@@ -35,7 +35,7 @@ namespace CLI {
         Flag(char shortName, std::string longName, std::string description);
     };
 
-    struct UnpositionalArgument {
+    struct Option {
         char shortName;
         std::string longName;
         // used for automatic usage generation
@@ -45,11 +45,11 @@ namespace CLI {
         bool present;
         std::string value;
 
-        UnpositionalArgument();
-        UnpositionalArgument(char shortName, std::string longName, std::string placeholder, std::string description);
+        Option();
+        Option(char shortName, std::string longName, std::string placeholder, std::string description);
     };
 
-    struct PositionalArgument {
+    struct Argument {
         // used for automatic usage generation
         std::string description;
         std::string placeholder; // the "HOST" in "ping [-c <COUNT>] <HOST>"
@@ -57,17 +57,19 @@ namespace CLI {
         bool present;
         std::string value;
 
-        PositionalArgument();
-        PositionalArgument(std::string placeholder, std::string description);
+        Argument();
+        Argument(std::string placeholder, std::string description);
     };
 
     class ArgumentsParser {
         private:
             std::map<char, Flag*> flagsByShortName;
             std::map<std::string, Flag*> flagsByLongName;
-            std::map<char, UnpositionalArgument*> argumentsByShortName;
-            std::map<std::string, UnpositionalArgument*> argumentsByLongName;
-            std::vector<PositionalArgument> positionalArguments;
+            std::map<char, Option*> optionsByShortName;
+            std::map<std::string, Option*> optionsByLongName;
+            std::vector<Argument> arguments;
+            std::string description;
+            std::string additionalInfo;
 
         public:
             std::string programName;
@@ -75,14 +77,16 @@ namespace CLI {
             std::vector<std::string> wrongUsageMessages;
 
             // using int here bc that's how main() is defined
-            ArgumentsParser(int argc, const char* const argv[], std::vector<Flag> flags, std::vector<UnpositionalArgument> unpositionalArguments, std::vector<PositionalArgument> positionalArguments);
+            ArgumentsParser(int argc, const char* const argv[], std::vector<Flag> flags, std::vector<Option> options, std::vector<Argument> arguments);
+            ArgumentsParser(int argc, const char* const argv[], std::vector<Flag> flags, std::vector<Option> options, std::vector<Argument> arguments, std::string description);
+            ArgumentsParser(int argc, const char* const argv[], std::vector<Flag> flags, std::vector<Option> options, std::vector<Argument> arguments, std::string description, std::string additionalInfo);
             ~ArgumentsParser();
 
             ErrorOr<bool> getFlag(char shortName);
             ErrorOr<bool> getFlag(std::string longName);
-            ErrorOr<std::string> getPositionalArgument(std::vector<CLI::PositionalArgument>::size_type position);
-            ErrorOr<std::string> getUnpositionalArgument(char shortName);
-            ErrorOr<std::string> getUnpositionalArgument(std::string longName);
+            ErrorOr<std::string> getArgument(std::vector<CLI::Argument>::size_type position);
+            ErrorOr<std::string> getOption(char shortName);
+            ErrorOr<std::string> getOption(std::string longName);
 
             std::string getUsage();
     };

src/lib/error.hpp

@@ -23,37 +23,43 @@ struct ErrorOr {
     uint8_t errorCode;
     T value;
 
-    ErrorOr<T>();
-    ErrorOr<T>(T);
-    ErrorOr<T>(bool, uint8_t);
-    ErrorOr<T>(bool, uint8_t, T);
+    ErrorOr() {
+        this->isError = false;
+        this->errorCode = 0;
+    }
+
+    ErrorOr(T value) {
+        this->isError = false;
+        this->errorCode = 0;
+        this->value = value;
+    }
+
+    ErrorOr(bool isError, uint8_t errorCode) {
+        this->isError = isError;
+        this->errorCode = errorCode;
+    }
+
+    ErrorOr(bool isError, uint8_t errorCode, T value) {
+        this->isError = isError;
+        this->errorCode = errorCode;
+        this->value = value;
+    }
 };
 
-template <typename T>
-ErrorOr<T>::ErrorOr() {
+struct ErrorOrVoid {
+    bool isError;
+    uint8_t errorCode;
+
+    ErrorOrVoid() {
         this->isError = false;
         this->errorCode = 0;
-}
+    }
 
-template <typename T>
-ErrorOr<T>::ErrorOr(T value) {
-    this->isError = false;
-    this->errorCode = 0;
-    this->value = value;
-}
-
-template <typename T>
-ErrorOr<T>::ErrorOr(bool isError, uint8_t errorCode) {
+    ErrorOrVoid(bool isError, uint8_t errorCode) {
         this->isError = isError;
         this->errorCode = errorCode;
-}
-
-template <typename T>
-ErrorOr<T>::ErrorOr(bool isError, uint8_t errorCode, T value) {
-    this->isError = isError;
-    this->errorCode = errorCode;
-    this->value = value;
-}
+    }
+};
 
 namespace ErrorCodes {
     // These are all arbitrary values used to assign error codes to different
@@ -64,13 +70,10 @@ namespace ErrorCodes {
     // Ahh yes, very useful.
     const uint8_t SUCCESS = 0;
 
-    // IndexOutOfRangeException equivalent
     const uint8_t OUT_OF_RANGE = 1;
-
-    // when going out of bounds in a non-predetermined way
+    // like OUT_OF_RANGE but when going out of bounds in a non-predetermined way
     const uint8_t OVERRUN = 2;
 
-    // when checking for presence of something, for example CLI arguments
     const uint8_t NOT_PRESENT = 3;
 
     const uint8_t WRONG_USAGE = 4;
@@ -78,6 +81,20 @@ namespace ErrorCodes {
     // when dealing with maps
     const uint8_t UNKNOWN_KEY = 5;
 
+    //mismatched size in java strings
+    const uint8_t MISMATCHEDSIZE = 6;
+
+    const uint8_t NOT_YET_KNOWN = 7;
+
+    const uint8_t INVALID_TYPE = 8;
+
+    const uint8_t FILE_NOT_OPEN = 9;
+    const uint8_t FILE_NOT_FOUND = 10;
+
+    // when performing an operation that would technically be valid but must
+    // never be performed (like deleting an end tag from an NBT compound)
+    const uint8_t NOT_ALLOWED = 11;
+
     const uint8_t UNIMPLEMENTED = 254;
 
     const uint8_t UNKNOWN = 255;

src/lib/file.cpp

@@ -0,0 +1,274 @@
+// Copyright 2022, FOSS-VG Developers and Contributers
+//
+// Author(s):
+//   Bodgemaster, Shwoomple
+//
+// This program is free software: you can redistribute it and/or modify it
+// under the terms of the GNU Affero General Public License as published
+// by the Free Software Foundation, version 3.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied
+// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// version 3 along with this program.
+// If not, see https://www.gnu.org/licenses/agpl-3.0.en.html
+
+#include <fstream>
+#include <filesystem>
+#include <exception>
+#include <vector>
+#include <string>
+#include "tinyutf8/tinyutf8.h"
+#include "file.hpp"
+
+File::File(std::string path, char mode, uint64_t cursorPosition): mode(mode), path(path), cursorPosition(cursorPosition){
+    std::filesystem::path filePath = path;
+    if(this->mode == 'w' || (this->mode == 'a' && !std::filesystem::exists(filePath))){
+        this->size = ErrorOr<uint64_t>(0);
+    }else{
+        this->size = ErrorOr<uint64_t>(std::filesystem::file_size(filePath));
+    }
+    this->open();
+}
+
+File::~File() {
+    if (this->isOpen) {
+        this->fileStream.close();
+    }
+}
+
+void File::open(){
+    switch(this->mode){
+        case 'w':
+            this->fileStream.open(this->path, std::fstream::out | std::fstream::binary);
+            break;
+        case 'm':
+            this->fileStream.open(this->path, std::fstream::out | std::fstream::in | std::fstream::binary);
+            break;
+        case 'r':
+            this->fileStream.open(this->path, std::fstream::in | std::fstream::binary);
+            break;
+        case 'a':
+            this->fileStream.open(this->path, std::fstream::app | std::fstream::binary);
+            break;
+        default:
+            break;
+    }
+
+    std::filesystem::path filePath = this->path;
+    this->size = ErrorOr<uint64_t>(std::filesystem::file_size(filePath));
+    this->isOpen = this->fileStream.is_open();
+}
+
+void File::close(){
+    this->fileStream.close();
+    this->isOpen = false;
+}
+
+bool File::eof() {
+    return !this->size.isError && this->cursorPosition >= this->size.value;
+}
+
+ErrorOr<uint8_t> File::readByte(){
+    if (!this->isOpen) {
+        return ErrorOr<uint8_t>(true, ErrorCodes::FILE_NOT_OPEN);
+    }
+    if (!this->size.isError && this->cursorPosition >= this->size.value) {
+        return ErrorOr<uint8_t>(true, ErrorCodes::OVERRUN);
+    }
+
+    uint8_t* nextPointer = new uint8_t;
+    uint8_t nextByte;
+    bool failure = false;
+
+    try {
+        this->fileStream.seekg(this->cursorPosition);
+        this->fileStream.read(reinterpret_cast<char*>(nextPointer), 1);
+        nextByte = *nextPointer;
+        this->cursorPosition++;
+
+    } catch (std::exception& e) {
+        failure = true;
+    }
+
+    delete nextPointer;
+    return failure? ErrorOr<uint8_t>(true, ErrorCodes::UNKNOWN) : ErrorOr<uint8_t>(nextByte);
+}
+
+ErrorOr<std::vector<uint8_t>> File::read(uint64_t bytes){
+    if (!this->isOpen) {
+        return ErrorOr<std::vector<uint8_t>>(true, ErrorCodes::FILE_NOT_OPEN);
+    }
+    if (!this->size.isError && this->cursorPosition >= this->size.value+bytes) {
+        return ErrorOr<std::vector<uint8_t>>(true, ErrorCodes::OVERRUN);
+    }
+
+    uint8_t* buffer = new uint8_t[bytes];
+    std::vector<uint8_t> data;
+    bool failure = false;
+
+    try {
+        this->fileStream.seekg(this->cursorPosition);
+        this->fileStream.read(reinterpret_cast<char*>(buffer), bytes);
+        data = std::vector<uint8_t>(buffer, buffer+bytes);
+        this->cursorPosition += bytes;
+
+    } catch (std::exception& e) {
+        failure = true;
+    }
+
+    delete[] buffer;
+    return failure? ErrorOr<std::vector<uint8_t>>(true, ErrorCodes::UNKNOWN) : ErrorOr<std::vector<uint8_t>>(data);
+}
+
+ErrorOr<tiny_utf8::string> File::readString(uint64_t bytes){
+    ErrorOr<std::vector<uint8_t>> data = this->read(bytes);
+    if(data.isError){
+        return ErrorOr<tiny_utf8::string>(true, data.errorCode);
+    }
+    std::string s;
+    for(auto byte: data.value){
+        s.push_back(byte);
+    }
+    return ErrorOr<tiny_utf8::string>(tiny_utf8::string(s));
+}
+
+ErrorOrVoid File::writeByte(uint8_t byte){
+
+    bool failure = false;
+
+    try{
+        this->fileStream << byte;
+    }catch(std::exception& e){
+        failure = true;
+    }
+
+    return failure ? ErrorOrVoid(true, ErrorCodes::UNKNOWN) : ErrorOrVoid();
+}
+
+ErrorOrVoid File::write(std::vector<uint8_t> data){
+    bool failure = false;
+
+    try{
+        this->fileStream << std::string(data.begin(), data.end());
+    }catch(std::exception& e){
+        failure = true;
+    }
+
+    return failure ? ErrorOrVoid(true, ErrorCodes::UNKNOWN) : ErrorOrVoid();
+}
+
+ErrorOrVoid File::writeString(tiny_utf8::string data){
+    bool failure = false;
+
+    try{
+        this->fileStream << data;
+    }catch(std::exception& e){
+        failure = true;
+    }
+    return failure ? ErrorOrVoid(true, ErrorCodes::UNKNOWN) : ErrorOrVoid();
+}
+
+// Naive implementation of insertByte
+ErrorOrVoid File::insertByte(uint8_t byte){
+    bool failure = false;
+
+    try{
+        uint8_t* buffer = new uint8_t[this->size.value];
+        std::vector<uint8_t> readData;
+
+        this->fileStream.read(reinterpret_cast<char*>(buffer), this->size.value);
+        readData = std::vector<uint8_t>(buffer, buffer+this->size.value);
+
+        readData.insert(readData.begin()+this->cursorPosition, byte);
+        this->fileStream.seekg(0);
+        this->write(readData);
+        this->cursorPosition++;
+        delete buffer;
+    }catch(std::exception& e){
+        failure = true;
+    }
+    return failure ? ErrorOrVoid(true, ErrorCodes::UNKNOWN) : ErrorOrVoid();
+}
+
+
+ErrorOrVoid File::insert(std::vector<uint8_t> data){
+    bool failure = false;
+
+    try{
+        uint8_t* buffer = new uint8_t[this->size.value];
+        std::vector<uint8_t> readData;
+
+        this->fileStream.read(reinterpret_cast<char*>(buffer), this->size.value);
+        readData = std::vector<uint8_t>(buffer, buffer+this->size.value);
+
+        readData.insert(readData.begin()+this->cursorPosition, data.begin(), data.end());
+        this->fileStream.seekg(0);
+        this->write(readData);
+        this->cursorPosition += data.size();
+        delete buffer;
+    }catch(std::exception& e){
+        failure = true;
+    }
+    return failure ? ErrorOrVoid(true, ErrorCodes::UNKNOWN) : ErrorOrVoid();
+}
+
+ErrorOrVoid File::insertString(tiny_utf8::string string){
+    bool failure = false;
+
+    try{
+        uint8_t* buffer = new uint8_t[this->size.value];
+        tiny_utf8::string readData;
+
+        this->fileStream.read(reinterpret_cast<char*>(buffer), this->size.value);
+        
+        readData = tiny_utf8::string((char *) buffer);
+        readData.insert(readData.begin()+this->cursorPosition, string);
+
+        this->fileStream.seekg(0);
+
+        //TODO: fix hack. tinyutf8 appends "_utf-8" when readData is assigned: tiny_utf8::string((char *) buffer);
+        this->writeString(readData.substr(0, readData.find("_utf-8")));
+        this->cursorPosition += string.size();
+        delete buffer;
+    }catch(std::exception& e){
+        failure = true;
+    }
+    return failure ? ErrorOrVoid(true, ErrorCodes::UNKNOWN) : ErrorOrVoid();
+}
+
+ErrorOr<uint8_t> File::cutByte(){
+    bool failure = false;
+    uint8_t byte;
+    try{
+        uint8_t* buffer = new uint8_t[this->size.value];
+        std::vector<uint8_t> readData;
+
+        this->fileStream.read(reinterpret_cast<char*>(buffer), this->size.value);
+        readData = std::vector<uint8_t>(buffer, buffer+this->size.value);
+
+        byte = readData[this->cursorPosition];
+        readData.erase(readData.begin() + this->cursorPosition);
+
+        this->fileStream.seekg(0);
+        this->write(readData);
+        this->cursorPosition++;
+        delete buffer;
+    }catch(std::exception& e){
+        failure = true;
+    }
+    return failure ? ErrorOr<uint8_t>(true, ErrorCodes::UNKNOWN) : ErrorOr<uint8_t>(byte);
+}
+
+ErrorOr<File*> File::open(std::string path, char mode, uint64_t startPosition){
+    if (!std::filesystem::exists(path) && (mode == 'r' || mode == 'm')) {
+        return ErrorOr<File*>(true, ErrorCodes::FILE_NOT_FOUND, nullptr);
+    }
+
+    //TODO: check access perms
+
+    return ErrorOr<File*>(new File(path, mode, startPosition));
+}

src/lib/file.hpp

@@ -0,0 +1,92 @@
+// Copyright 2022, FOSS-VG Developers and Contributers
+//
+// Author(s):
+//   BodgeMaster, Shwoomple
+//
+// This program is free software: you can redistribute it and/or modify it
+// under the terms of the GNU Affero General Public License as published
+// by the Free Software Foundation, version 3.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied
+// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// version 3 along with this program.
+// If not, see https://www.gnu.org/licenses/agpl-3.0.en.html
+
+#include <cstdint>
+#include <string>
+#include <fstream>
+#include <vector>
+#include <tinyutf8/tinyutf8.h>
+
+#include "error.hpp"
+
+
+class File {
+    private:
+        //TODO: add other necessary internals to this section as needed
+        char mode;
+        std::fstream fileStream;
+        //TODO: add other necessary details to the constructor as needed
+        // For example, the fstream (or whatever mechanism is used) needs
+        // to be handed over from File::open() to the File object.
+        //
+        // Remember to add a destructor to the public section if pointers
+        // are to be used.
+        File(std::string path, char mode, uint64_t cursorPosition);
+    public:
+        bool isOpen;
+        std::string path;
+        uint64_t cursorPosition;
+        // may be error if not a regular file or size cannot be determined
+        ErrorOr<uint64_t> size;
+
+        File() {};
+        ~File();
+
+        void open();
+        void close();
+
+        bool eof();
+
+        // only applicable to read and edit modes
+        // moves the cursor to the right of the read section
+        ErrorOr<uint8_t> readByte();
+        ErrorOr<std::vector<uint8_t>> read(uint64_t bytes);
+        ErrorOr<tiny_utf8::string> readString(uint64_t bytes);
+
+        // only applicable to write, modify, append, and edit modes
+        // in modify and edit modes, overwrite whatever is at the
+        // cursor position if there is anything there
+        // moves the cursor to the right of the written section
+        ErrorOrVoid writeByte(uint8_t byte);
+        ErrorOrVoid write(std::vector<uint8_t> data);
+        ErrorOrVoid writeString(tiny_utf8::string string);
+
+        // only applicable to modify and edit modes
+        // insert at cursor position and move other contents to the right
+        // moves the cursor to the right of the inserted section
+        ErrorOrVoid insertByte(uint8_t byte);
+        ErrorOrVoid insert(std::vector<uint8_t> data);
+        ErrorOrVoid insertString(tiny_utf8::string string);
+
+        // only applicable to edit mode
+        // return the cut section, remove cut section from file
+        // moves the cursor to the right of where it happened
+        ErrorOr<uint8_t> cutByte();
+        ErrorOr<std::vector<uint8_t>> cut(uint64_t length);
+        ErrorOr<tiny_utf8::string> cutString(uint64_t length);
+
+        // modes:
+        //  r (read)
+        //  w (write: overwrite file deleting its previous contents)
+        //  a (append: write to end of file)
+        //  m (modify: write to file modifying its previous contents)
+        //
+        // A startPosition of 0xFFFFFFFF is considered to be the end of
+        // the file whatever its size.
+        static ErrorOr<File*> open(std::string path, char mode, uint64_t startPosition=0);
+};

src/lib/javacompat.cpp

@@ -15,18 +15,30 @@
 
 #include <tinyutf8/tinyutf8.h>
 #include <string>
-#include "error.h++"
+#include "error.hpp"
+#include "javacompat.hpp"
+#include "../../.endianness"
 
-#include "javacompat.h++"
+#ifdef FOSSVG_ENDIAN_BIG_WORD
+    #error "Honeywell-316-style endianness is not supported. If you feel like it should, feel free to participate in the project to maintain it."
+#endif
+#ifdef FOSSVG_ENDIAN_LITTLE_WORD
+    #error "PDP-11-style endianness is not supported. If you feel like it should, feel free to participate in the project to maintain it."
+#endif
+#ifdef FOSSVG_ENDIAN_UNKNOWN
+    #error "The endianness of your system could not be determined. Please set it manually. FOSS-VG is currently implemented using some endian-specific functions."
+#endif
 
 namespace JavaCompat {
-    //FIXME: contrary to what I said, we need to explicitly pass the data
-    // size because files could have been tampered with or corrupted
-    tiny_utf8::string importJavaString(uint8_t data[]) {
+    ErrorOr<tiny_utf8::string> importJavaString(uint8_t data[], uint16_t size) {
         std::string stdString;
-        uint16_t size = static_cast<uint16_t>(data[0])<<8 | static_cast<uint16_t>(data[1]);
+        uint16_t encodedSize = static_cast<uint16_t>(data[0])<<8 | static_cast<uint16_t>(data[1]);
 
-        for(uint8_t i=2; i<size+2; i++){
+        if(encodedSize != size){
+            return ErrorOr<tiny_utf8::string>(true, ErrorCodes::MISMATCHEDSIZE);
+        }
+
+        for(uint16_t i=2; i<size+2; i++){
             if(i != 0){
                 if(data[i] == 0x80 && data[i-1] == 0xc0){
                     stdString[stdString.length() - 1] = '\0';
@@ -35,11 +47,48 @@ namespace JavaCompat {
             }
             stdString.push_back((char) data[i]);
         }
-        return tiny_utf8::string(stdString);
+        return ErrorOr<tiny_utf8::string>(tiny_utf8::string(stdString));
     }
-    /*
-    ErrorOr<uint8_t*> exportJavaString(tiny_utf8::string data) {
-        return ErrorOr(nullptr);
+
+    ErrorOr<std::vector<uint8_t>> exportJavaString(tiny_utf8::string data) {
+        uint16_t* size = new uint16_t;
+        uint8_t* sizeBytes = reinterpret_cast<uint8_t*>(size);
+        std::vector<uint8_t> output = std::vector<uint8_t>();
+        std::string stdString = data.cpp_str();
+
+        if(stdString.size() > 0xFFFF){
+            return ErrorOr<std::vector<uint8_t>>(true, ErrorCodes::OVERRUN);
         }
-    */
+
+        *size = (uint16_t) stdString.size();
+
+        //placeholder size bytes
+        output.push_back(0x00);
+        output.push_back(0x00);
+        for(uint16_t i=0; i<stdString.size(); i++){
+            if((uint8_t) stdString[i] == 0x00){
+                *size += 1;
+                output.push_back(0xc0);
+                output.push_back(0x80);
+                continue;
+            }
+            output.push_back(stdString[i]);
+        }
+
+        //FIXME: endian-dependent implementation
+        #ifdef FOSSVG_BIG_ENDIAN
+            output[0] = *sizeBytes;
+            output[1] = *(sizeBytes+1);
+        #else
+            #ifdef FOSSVG_LITTLE_ENDIAN
+                output[0] = *(sizeBytes+1);
+                output[1] = *sizeBytes;
+            #else
+                #error "JavaCompat::exportJavaString: An implementation for your endianness is unavailable."
+            #endif
+        #endif
+
+        return ErrorOr(output);
+    }
+
 }

src/lib/javacompat.hpp

@@ -13,12 +13,11 @@
 //version 3 along with this program.
 //If not, see https://www.gnu.org/licenses/agpl-3.0.en.html
 
+#include <vector>
 #include <tinyutf8/tinyutf8.h>
-#include "error.h++"
+#include "error.hpp"
 
 namespace JavaCompat {
-    //FIXME: contrary to what I said, we need to explicitly pass the data
-    // size because files could have been tampered with or corrupted
-    tiny_utf8::string importJavaString(uint8_t data[]);
-    ErrorOr<uint8_t*> exportJavaString(tiny_utf8::string data);
+    ErrorOr<tiny_utf8::string> importJavaString(uint8_t data[], uint16_t size);
+    ErrorOr<std::vector<uint8_t>> exportJavaString(tiny_utf8::string data);
 }

src/lib/nbt.h++

@@ -1,79 +0,0 @@
-// Copyright 2022, FOSS-VG Developers and Contributers
-//
-// This program is free software: you can redistribute it and/or modify it
-// under the terms of the GNU Affero General Public License as published
-// by the Free Software Foundation, version 3.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied
-// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
-// See the GNU Affero General Public License for more details.
-//
-// You should have received a copy of the GNU Affero General Public License
-// version 3 along with this program.
-// If not, see https://www.gnu.org/licenses/agpl-3.0.en.html
-
-// information taken from https://wiki.vg/NBT
-// This is an attempt at creating a uniform model for all NBT tags to allow for a uniform interface based on subclassing a single NBT tag super class.
-
-// NBT tags have a type, optionally a name which consists of the name size and the name string, optionally content type, and optionally a payload which can consist of optionally content type, optionally a content size,
-// and the stored content. The format in which they are stored is as follows: <type><name size><name><payload>. All numbers are stored in big endian representation.
-// All tag types:
-// generic representation:  Tag(uint8:tag_type, String:name, uint16:name_size, byte[]:content, int32:size)
-// None (compound end):     Tag( 0, "",          0,                None,           0) => used to determine the end of a compound tag, only the type gets stored
-// int8:                    Tag( 1, String:name, uint16:name_size, int8:content,   1) => a single signed byte, size not stored
-// int16:                   Tag( 2, String:name, uint16:name_size, int16:content,  2) => 16 bit signed integer, size not stored
-// int32:                   Tag( 3, String:name, uint16:name_size, int32:content,  4) => 32 bit signed integer, size not stored
-// int64:                   Tag( 4, String:name, uint16:name_size, int64:content,  8) => 64 bit signed integer, size not stored
-// float32:                 Tag( 5, String:name, uint16:name_size, float32:content,4) => 32 bit IEEE754 floating point number, size not stored
-// float64:                 Tag( 6, String:name, uint16:name_size, float64:content,8) => 64 bit IEEE754 floating point number, size not stored
-// int8[]:                  Tag( 7, String:name, uint16:name_size, int8[]:content, int32:size) => content stored prefixed with size
-// String:                  Tag( 8, String:name, uint16:name_size, String:content, uint16:size) => Java style modified UTF-8 string, content stored prefixed with size
-// Tag[] (list):            Tag<Tag:type>( 9, String:name, uint16:name_size, Tag[]:content, int32:size) => list of tags of the same type with tag type and name information omitted prefixed by (in order) content type and size
-// Tag[] (compound):        Tag(10, String:name, uint16:name_size, Tag[]:content,  int32:size) => list of tags, last tag is always an end tag, size not stored
-// int32[]:                 Tag(11, String:name, uint16:name_size, int32[]:content,int32:size) => list of 32 bit signed integers prefixed with its size, endianness not verified at this point
-// int64[]:                 Tag(12, String:name, uint16:name_size, int64[]:content,int32:size) => list of 64 bit signed integers prefixed with its size, endianness not verified at this point
-
-#pragma once
-#include <cstdint>
-#include <vector>
-#include "error.h++"
-
-namespace NBT {
-    namespace helper {
-        ErrorOr<int8_t> readInt8(uint8_t data[], uint64_t dataSize, uint64_t currentPosition);
-        ErrorOr<int16_t> readInt16(uint8_t data[], uint64_t dataSize, uint64_t currentPosition);
-        ErrorOr<int32_t> readInt32(uint8_t data[], uint64_t dataSize, uint64_t currentPosition);
-        ErrorOr<int64_t> readInt64(uint8_t data[], uint64_t dataSize, uint64_t currentPosition);
-        //FIXME: we just assume that float is a single-precision IEEE754
-        // floating point number
-        ErrorOr<float> readFloat32(uint8_t data[], uint64_t dataSize, uint64_t currentPosition);
-        //FIXME: we just assume that double is a double-precision IEEE754
-        // floating point number
-        ErrorOr<double> readFloat64(uint8_t data[], uint64_t dataSize, uint64_t currentPosition);
-        ErrorOr<std::vector<int8_t>> readInt8Array(uint8_t data[], uint64_t dataSize, uint64_t currentPosition);
-        //ErrorOr<> readString(uint8_t data[], uint64_t dataSize, uint64_t currentPosition);
-        ErrorOr<std::vector<int32_t>> readInt32Array(uint8_t data[], uint64_t dataSize, uint64_t currentPosition);
-        ErrorOr<std::vector<int64_t>> readInt64Array(uint8_t data[], uint64_t dataSize, uint64_t currentPosition);
-
-        void writeInt8(std::vector<uint8_t>* destination, int8_t data);
-        void writeInt16(std::vector<uint8_t>* destination, int16_t data);
-        void writeInt32(std::vector<uint8_t>* destination, int32_t data);
-        void writeInt64(std::vector<uint8_t>* destination, int64_t data);
-        //FIXME: we just assume that float is a single-precision IEEE754
-        // floating point number
-        void writeFloat32(std::vector<uint8_t>* destination, float data);
-        //FIXME: we just assume that double is a single-precision IEEE754
-        // floating point number
-        void writeFloat64(std::vector<uint8_t>* destination, double data);
-        void writeInt8Array(std::vector<uint8_t>* destination, std::vector<int8_t> data);
-        void writeInt8Array(std::vector<uint8_t>* destination, int8_t data[], uint32_t dataSize);
-        //void writeString(std::vector<uint8_t>* destination, <string type> data);
-        void writeInt32Array(std::vector<uint8_t>* destination, std::vector<int32_t> data);
-        void writeInt32Array(std::vector<uint8_t>* destination, int32_t data[], uint32_t dataSize);
-        void writeInt64Array(std::vector<uint8_t>* destination, std::vector<int64_t> data);
-        void writeInt64Array(std::vector<uint8_t>* destination, int64_t data[], uint32_t dataSize);
-    }
-
-    bool validateRawNBTData(uint8_t data[], int length);
-}

src/lib/nbt.hpp

@@ -0,0 +1,307 @@
+// Copyright 2022, FOSS-VG Developers and Contributers
+//
+// This program is free software: you can redistribute it and/or modify it
+// under the terms of the GNU Affero General Public License as published
+// by the Free Software Foundation, version 3.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied
+// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// version 3 along with this program.
+// If not, see https://www.gnu.org/licenses/agpl-3.0.en.html
+
+// information taken from https://wiki.vg/NBT
+// This is an attempt at creating a uniform model for all NBT tags to allow for a uniform interface based on subclassing a single NBT tag super class.
+
+// NBT tags have a type, optionally a name which consists of the name size and the name string, optionally content type, and optionally a payload which can consist of optionally content type, optionally a content size,
+// and the stored content. The format in which they are stored is as follows: <type><name size><name><payload>. All numbers are stored in big endian representation.
+// All tag types:
+// Generic:    Tag(uint8:tag_type, String:name, uint16:name_size, byte[]:content, int32:size)
+// End:        Tag( 0, "",          0,                None,           0) => used to determine the end of a compound tag, only the type gets stored
+// Int8:       Tag( 1, String:name, uint16:name_size, int8:content,   1) => a single signed byte, size not stored
+// Int16:      Tag( 2, String:name, uint16:name_size, int16:content,  2) => 16 bit signed integer, size not stored
+// Int32:      Tag( 3, String:name, uint16:name_size, int32:content,  4) => 32 bit signed integer, size not stored
+// Int64:      Tag( 4, String:name, uint16:name_size, int64:content,  8) => 64 bit signed integer, size not stored
+// Float:      Tag( 5, String:name, uint16:name_size, float:content,  4) => 32 bit IEEE754 floating point number, size not stored
+// Double:     Tag( 6, String:name, uint16:name_size, double:content, 8) => 64 bit IEEE754 floating point number, size not stored
+// Int8Array:  Tag( 7, String:name, uint16:name_size, int8[]:content, int32:length) => content stored prefixed with size
+// String:     Tag( 8, String:name, uint16:name_size, String:content, uint16:size) => Java style modified UTF-8 string, content stored prefixed with size
+// List:       Tag<Tag:type>( 9, String:name, uint16:name_size, Tag[]:content, int32:length) => list of tags of the same type with tag type and name information omitted prefixed by (in order) content type and length
+// Compound:   Tag(10, String:name, uint16:name_size, Tag[]:content,  int32:length) => list of tags, last tag is always an end tag, size not stored
+// Int32Array: Tag(11, String:name, uint16:name_size, int32[]:content,int32:length) => list of 32 bit signed integers prefixed with its size
+// Int64Array: Tag(12, String:name, uint16:name_size, int64[]:content,int32:length) => list of 64 bit signed integers prefixed with its size
+
+#pragma once
+#include <cstdint>
+#include <vector>
+#include <tinyutf8/tinyutf8.h>
+#include <mutex>
+
+#include "error.hpp"
+
+namespace NBT {
+    namespace Helper {
+        ErrorOr<int8_t> readInt8(uint8_t data[], uint64_t dataSize, uint64_t currentPosition);
+        ErrorOr<int16_t> readInt16(uint8_t data[], uint64_t dataSize, uint64_t currentPosition);
+        ErrorOr<int32_t> readInt32(uint8_t data[], uint64_t dataSize, uint64_t currentPosition);
+        ErrorOr<int64_t> readInt64(uint8_t data[], uint64_t dataSize, uint64_t currentPosition);
+        ErrorOr<float> readFloat(uint8_t data[], uint64_t dataSize, uint64_t currentPosition);
+        ErrorOr<double> readDouble(uint8_t data[], uint64_t dataSize, uint64_t currentPosition);
+        ErrorOr<std::vector<int8_t>> readInt8Array(uint8_t data[], uint64_t dataSize, uint64_t currentPosition);
+        ErrorOr<tiny_utf8::string> readString(uint8_t data[], uint64_t dataSize, uint64_t currentPosition);
+        ErrorOr<std::vector<int32_t>> readInt32Array(uint8_t data[], uint64_t dataSize, uint64_t currentPosition);
+        ErrorOr<std::vector<int64_t>> readInt64Array(uint8_t data[], uint64_t dataSize, uint64_t currentPosition);
+
+        void writeInt8(std::vector<uint8_t>* destination, int8_t data);
+        void writeInt16(std::vector<uint8_t>* destination, int16_t data);
+        void writeInt32(std::vector<uint8_t>* destination, int32_t data);
+        void writeInt64(std::vector<uint8_t>* destination, int64_t data);
+        void writeFloat(std::vector<uint8_t>* destination, float data);
+        void writeDouble(std::vector<uint8_t>* destination, double data);
+        void writeInt8Array(std::vector<uint8_t>* destination, std::vector<int8_t> data);
+        void writeInt8Array(std::vector<uint8_t>* destination, int8_t data[], uint32_t dataSize);
+        ErrorOrVoid writeString(std::vector<uint8_t>* destination, tiny_utf8::string data);
+        void writeInt32Array(std::vector<uint8_t>* destination, std::vector<int32_t> data);
+        void writeInt32Array(std::vector<uint8_t>* destination, int32_t data[], uint32_t dataSize);
+        void writeInt64Array(std::vector<uint8_t>* destination, std::vector<int64_t> data);
+        void writeInt64Array(std::vector<uint8_t>* destination, int64_t data[], uint32_t dataSize);
+
+        ErrorOr<uint64_t> totalTagSize(uint8_t data[], uint64_t dataSize, uint64_t currentPosition);
+        ErrorOr<int32_t> containedDataLength(uint8_t data[], uint64_t dataSize, uint64_t currentPosition);
+    }
+
+    namespace TagType {
+        const uint8_t END        =   0;
+        const uint8_t INT8       =   1;
+        const uint8_t INT16      =   2;
+        const uint8_t INT32      =   3;
+        const uint8_t INT64      =   4;
+        const uint8_t FLOAT      =   5;
+        const uint8_t DOUBLE     =   6;
+        const uint8_t INT8_ARRAY =   7;
+        const uint8_t STRING     =   8;
+        const uint8_t LIST       =   9;
+        const uint8_t COMPOUND   =  10;
+        const uint8_t INT32_ARRAY=  11;
+        const uint8_t INT64_ARRAY=  12;
+        // This is a workaround that's not part of the spec.
+        const uint8_t INVALID    = 255;
+    }
+
+    namespace Tag {
+
+        class Generic {
+            protected:
+                std::mutex mutex;
+                uint8_t type;
+            public:
+                tiny_utf8::string name;
+
+                Generic();
+                virtual ~Generic();
+
+                virtual ErrorOrVoid serialize(std::vector<uint8_t>* rawData);
+                virtual ErrorOrVoid serializeWithoutHeader(std::vector<uint8_t>* rawData);
+                uint8_t getTagType();
+        };
+
+        class End: public Generic {
+            public:
+                End();
+
+                // This needs a separate serializer because
+                // END tags have a special header.
+                ErrorOrVoid serialize(std::vector<uint8_t>* rawData) override;
+                ErrorOrVoid serializeWithoutHeader(std::vector<uint8_t>* rawData) override;
+        };
+
+        class Int8: public Generic {
+            private:
+                int8_t value;
+            public:
+                Int8();
+                Int8(tiny_utf8::string name, int8_t value);
+
+                ErrorOrVoid serializeWithoutHeader(std::vector<uint8_t>* rawData) override;
+                int8_t getValue();
+                void setValue(int8_t value);
+        };
+
+        class Int16: public Generic {
+            private:
+                int16_t value;
+            public:
+                Int16();
+                Int16(tiny_utf8::string name, int16_t value);
+
+                ErrorOrVoid serializeWithoutHeader(std::vector<uint8_t>* rawData) override;
+                int16_t getValue();
+                void setValue(int16_t value);
+        };
+
+        class Int32: public Generic {
+            private:
+                int32_t value;
+            public:
+                Int32();
+                Int32(tiny_utf8::string name, int32_t value);
+
+                ErrorOrVoid serializeWithoutHeader(std::vector<uint8_t>* rawData) override;
+                int32_t getValue();
+                void setValue(int32_t value);
+        };
+
+        class Int64: public Generic {
+            private:
+                int64_t value;
+            public:
+                Int64();
+                Int64(tiny_utf8::string name, int64_t value);
+
+                ErrorOrVoid serializeWithoutHeader(std::vector<uint8_t>* rawData) override;
+                int64_t getValue();
+                void setValue(int64_t value);
+        };
+
+        class Float: public Generic {
+            private:
+                float value;
+            public:
+                Float();
+                Float(tiny_utf8::string name, float value);
+
+                ErrorOrVoid serializeWithoutHeader(std::vector<uint8_t>* rawData) override;
+                float getValue();
+                void setValue(float value);
+        };
+
+        class Double: public Generic {
+            private:
+                double value;
+            public:
+                Double();
+                Double(tiny_utf8::string name, double value);
+
+                ErrorOrVoid serializeWithoutHeader(std::vector<uint8_t>* rawData) override;
+                double getValue();
+                void setValue(double value);
+        };
+
+        class Int8Array: public Generic {
+            private:
+                std::vector<int8_t> data;
+            public:
+                Int8Array();
+                Int8Array(tiny_utf8::string name, std::vector<int8_t> data);
+                Int8Array(tiny_utf8::string name, uint64_t length, int8_t data[]);
+
+                ErrorOrVoid serializeWithoutHeader(std::vector<uint8_t>* rawData) override;
+
+                std::vector<int8_t> getData();
+                ErrorOr<int8_t> getValue(uint64_t position);
+                void setData(std::vector<int8_t> newData);
+                ErrorOrVoid setValue(uint64_t position, int8_t value);
+                uint64_t length();
+                void addElement(int8_t element);
+                ErrorOrVoid removeElement(uint64_t position);
+        };
+
+        class String: public Generic {
+            private:
+                tiny_utf8::string value;
+            public:
+                String();
+                String(tiny_utf8::string name, tiny_utf8::string value);
+
+                ErrorOrVoid serializeWithoutHeader(std::vector<uint8_t>* rawData) override;
+                tiny_utf8::string getValue();
+                void setValue(tiny_utf8::string value);
+        };
+
+        class List: public Generic {
+            private:
+                std::vector<Generic*> tags;
+                uint8_t containedType;
+            public:
+                List();
+                List(tiny_utf8::string name, uint8_t type);
+                List(tiny_utf8::string name, std::vector<Generic*> data);
+
+                ~List() override;
+
+                ErrorOrVoid serializeWithoutHeader(std::vector<uint8_t>* rawData) override;
+
+                uint8_t getContainedType();
+                ErrorOr<Generic*> getElementPointer(uint64_t position);
+                ErrorOrVoid setElementPointerAt(uint64_t position, Generic* pointer);
+                ErrorOrVoid appendPointer(Generic* pointer);
+                ErrorOrVoid deleteElement(uint64_t position);
+                uint64_t length();
+        };
+
+        class Compound: public Generic {
+            private:
+                std::vector<Generic*> tags;
+                // built-in end tag
+                End* endPointer;
+            public:
+                Compound();
+                Compound(tiny_utf8::string name);
+                Compound(tiny_utf8::string name, std::vector<Generic*> data);
+
+                ~Compound() override;
+
+                ErrorOrVoid serializeWithoutHeader(std::vector<uint8_t>* rawData) override;
+
+                ErrorOr<Generic*> getElementPointer(uint64_t position);
+                ErrorOrVoid setElementPointerAt(uint64_t position, Generic* pointer);
+                ErrorOrVoid appendPointer(Generic* pointer);
+                ErrorOrVoid deleteElement(uint64_t position);
+                uint64_t length();
+        };
+
+        class Int32Array: public Generic {
+            private:
+                std::vector<int32_t> data;
+            public:
+                Int32Array();
+                Int32Array(tiny_utf8::string name, std::vector<int32_t> data);
+                Int32Array(tiny_utf8::string name, uint64_t length, int32_t data[]);
+
+                ErrorOrVoid serializeWithoutHeader(std::vector<uint8_t>* rawData) override;
+
+                std::vector<int32_t> getData();
+                ErrorOr<int32_t> getValue(uint64_t position);
+                void setData(std::vector<int32_t> newData);
+                ErrorOrVoid setValue(uint64_t position, int32_t value);
+                uint64_t length();
+                void addElement(int32_t element);
+                ErrorOrVoid removeElement(uint64_t position);
+        };
+
+        class Int64Array: public Generic {
+            private:
+                std::vector<int64_t> data;
+            public:
+                Int64Array();
+                Int64Array(tiny_utf8::string name, std::vector<int64_t> data);
+                Int64Array(tiny_utf8::string name, uint64_t length, int64_t data[]);
+
+                ErrorOrVoid serializeWithoutHeader(std::vector<uint8_t>* rawData) override;
+
+                std::vector<int64_t> getData();
+                ErrorOr<int64_t> getValue(uint64_t position);
+                void setData(std::vector<int64_t> newData);
+                ErrorOrVoid setValue(uint64_t position, int64_t value);
+                uint64_t length();
+                void addElement(int64_t element);
+                ErrorOrVoid removeElement(uint64_t position);
+        };
+    }
+
+    ErrorOr<std::vector<Tag::Generic*>> deserialize(uint8_t data[], uint64_t dataSize, uint64_t initialPosition=0, uint64_t* processedDataSize=nullptr);
+    bool validateRawNBTData(uint8_t data[], uint64_t dataSize, uint64_t initialPosition=0, uint64_t* processedDataSize=nullptr);
+}

src/test/assert.hpp

@@ -15,4 +15,4 @@
 
 #include <iostream>
 
-#define ASSERT(truth) if ((truth)); else { std::cout << "Assertion failed: " << #truth << std::endl; return 1; }
+#define ASSERT(truth) if ((truth)); else { std::cout << "On line " << __LINE__ << ": Assertion failed: " << #truth << std::endl; return 1; }

src/test/cli_argument_parser.cpp

@@ -16,14 +16,14 @@
 #include <string>
 #include <iostream>
 #include <vector>
-#include "assert.h++"
-#include "../lib/error.h++"
+#include "assert.hpp"
+#include "../lib/error.hpp"
 
-#include "../lib/cli.h++"
+#include "../lib/cli.hpp"
 
-int main(int argc, char* argv[]) {
+int main() {
     std::cout << "################################################################################" << std::endl;
-    std::cout << "CLI argument parser tests" << std::endl;
+    std::cout << "CLI argument parsing tests" << std::endl;
     std::cout << "################################################################################" << std::endl;
 
     // Valid parameter test ############################################
@@ -31,7 +31,7 @@ int main(int argc, char* argv[]) {
     // with many variations of valid input on a single command line.
     //
     // simulated command line:
-    // test -0 -ab -12345 --long-flag -cconcatenated -d separate-value -efdouble-concatenated "positional argument 0" -gh concatenated-separate-value --long-argument-with-value-included="included value" --long-argument-with-value-separated "separate value" "positional argument 1" "positional argument 2"
+    // test -0 -ab -12345 --long-flag -cconcatenated -d separate-value -efdouble-concatenated "argument 0" -gh concatenated-separate-value --long-argument-with-value-included="included value" --long-argument-with-value-separated "separate value" "argument 1" "argument 2"
 
     std::vector<CLI::Flag> validTestFlags;
     validTestFlags.push_back(CLI::Flag('0', "00000", "a short flag on its own"));
@@ -47,19 +47,19 @@ int main(int argc, char* argv[]) {
     validTestFlags.push_back(CLI::Flag('g', "ggggg", "short flags concatenated with an argument that has a separate value"));
     validTestFlags.push_back(CLI::Flag('6', "66666", "unused flag"));
 
-    std::vector<CLI::UnpositionalArgument> validTestUnpositionalArguments;
-    validTestUnpositionalArguments.push_back(CLI::UnpositionalArgument('c', "ccccc", "VALUE", "short argument concatenated with its value"));
-    validTestUnpositionalArguments.push_back(CLI::UnpositionalArgument('d', "ddddd", " VALUE", "short argument with separate value"));
-    validTestUnpositionalArguments.push_back(CLI::UnpositionalArgument('f', "fffff", "VALUE", "short argument concatenated with a flag and its value"));
-    validTestUnpositionalArguments.push_back(CLI::UnpositionalArgument('h', "hhhhh", " VALUE", "short argument concatenated with a flag with separate value"));
-    validTestUnpositionalArguments.push_back(CLI::UnpositionalArgument('x', "long-argument-with-value-included", "VALUE", "long argument with its value included using ="));
-    validTestUnpositionalArguments.push_back(CLI::UnpositionalArgument('y', "long-argument-with-value-separated", " VALUE", "long argument with separate value"));
-    validTestUnpositionalArguments.push_back(CLI::UnpositionalArgument('z', "zzzzz", "NOPE", "unused argument"));
+    std::vector<CLI::Option> validTestOptions;
+    validTestOptions.push_back(CLI::Option('c', "ccccc", "VALUE", "short argument concatenated with its value"));
+    validTestOptions.push_back(CLI::Option('d', "ddddd", " VALUE", "short argument with separate value"));
+    validTestOptions.push_back(CLI::Option('f', "fffff", "VALUE", "short argument concatenated with a flag and its value"));
+    validTestOptions.push_back(CLI::Option('h', "hhhhh", " VALUE", "short argument concatenated with a flag with separate value"));
+    validTestOptions.push_back(CLI::Option('x', "long-argument-with-value-included", "VALUE", "long argument with its value included using ="));
+    validTestOptions.push_back(CLI::Option('y', "long-argument-with-value-separated", " VALUE", "long argument with separate value"));
+    validTestOptions.push_back(CLI::Option('z', "zzzzz", "NOPE", "unused argument"));
 
-    std::vector<CLI::PositionalArgument> validTestPositionalArguments;
-    validTestPositionalArguments.push_back(CLI::PositionalArgument("argument0", "positional argument between optional parameters"));
-    validTestPositionalArguments.push_back(CLI::PositionalArgument("argument1", "positional argument"));
-    validTestPositionalArguments.push_back(CLI::PositionalArgument("argument2", "positional argument"));
+    std::vector<CLI::Argument> validTestArguments;
+    validTestArguments.push_back(CLI::Argument("argument0", "argument between optional parameters"));
+    validTestArguments.push_back(CLI::Argument("argument1", "argument"));
+    validTestArguments.push_back(CLI::Argument("argument2", "argument"));
 
     const char** validTestParameterList = new const char*[17];
     validTestParameterList[ 0] = "test";
@@ -71,17 +71,17 @@ int main(int argc, char* argv[]) {
     validTestParameterList[ 6] = "-d";
     validTestParameterList[ 7] = "separate-value";
     validTestParameterList[ 8] = "-efdouble-concatenated";
-    validTestParameterList[ 9] = "positional argument 0";
+    validTestParameterList[ 9] = "argument 0";
     validTestParameterList[10] = "-gh";
     validTestParameterList[11] = "concatenated-separate-value";
     validTestParameterList[12] = "--long-argument-with-value-included=included value";
     validTestParameterList[13] = "--long-argument-with-value-separated";
     validTestParameterList[14] = "separate value";
-    validTestParameterList[15] = "positional argument 1";
-    validTestParameterList[16] = "positional argument 2";
+    validTestParameterList[15] = "argument 1";
+    validTestParameterList[16] = "argument 2";
     int validTestParameterCount = 17;
 
-    CLI::ArgumentsParser validTestParameterParser = CLI::ArgumentsParser(validTestParameterCount, validTestParameterList, validTestFlags, validTestUnpositionalArguments, validTestPositionalArguments);
+    CLI::ArgumentsParser validTestParameterParser = CLI::ArgumentsParser(validTestParameterCount, validTestParameterList, validTestFlags, validTestOptions, validTestArguments);
 
     ASSERT(!validTestParameterParser.wrongUsage);
     ASSERT(validTestParameterParser.programName == std::string("test"));
@@ -115,49 +115,50 @@ int main(int argc, char* argv[]) {
     ASSERT(!validTestParameterParser.getFlag('6').isError);
     ASSERT(!validTestParameterParser.getFlag('6').value);
     ASSERT(!validTestParameterParser.getFlag(std::string("66666")).value);
-    ASSERT(!validTestParameterParser.getUnpositionalArgument('c').isError);
-    ASSERT(validTestParameterParser.getUnpositionalArgument('c').value==std::string("concatenated"));
-    ASSERT(validTestParameterParser.getUnpositionalArgument(std::string("ccccc")).value==std::string("concatenated"));
-    ASSERT(!validTestParameterParser.getUnpositionalArgument('d').isError);
-    ASSERT(validTestParameterParser.getUnpositionalArgument('d').value==std::string("separate-value"));
-    ASSERT(validTestParameterParser.getUnpositionalArgument(std::string("ddddd")).value==std::string("separate-value"));
+    ASSERT(!validTestParameterParser.getOption('c').isError);
+    ASSERT(validTestParameterParser.getOption('c').value==std::string("concatenated"));
+    ASSERT(validTestParameterParser.getOption(std::string("ccccc")).value==std::string("concatenated"));
+    ASSERT(!validTestParameterParser.getOption('d').isError);
+    ASSERT(validTestParameterParser.getOption('d').value==std::string("separate-value"));
+    ASSERT(validTestParameterParser.getOption(std::string("ddddd")).value==std::string("separate-value"));
     ASSERT(!validTestParameterParser.getFlag('e').isError);
     ASSERT(validTestParameterParser.getFlag('e').value);
     ASSERT(validTestParameterParser.getFlag(std::string("eeeee")).value);
-    ASSERT(!validTestParameterParser.getUnpositionalArgument('f').isError);
-    ASSERT(validTestParameterParser.getUnpositionalArgument('f').value==std::string("double-concatenated"));
-    ASSERT(validTestParameterParser.getUnpositionalArgument(std::string("fffff")).value==std::string("double-concatenated"));
-    ASSERT(!validTestParameterParser.getPositionalArgument(0).isError);
-    ASSERT(validTestParameterParser.getPositionalArgument(0).value=="positional argument 0");
+    ASSERT(!validTestParameterParser.getOption('f').isError);
+    ASSERT(validTestParameterParser.getOption('f').value==std::string("double-concatenated"));
+    ASSERT(validTestParameterParser.getOption(std::string("fffff")).value==std::string("double-concatenated"));
+    ASSERT(!validTestParameterParser.getArgument(0).isError);
+    ASSERT(validTestParameterParser.getArgument(0).value=="argument 0");
     ASSERT(!validTestParameterParser.getFlag('g').isError);
     ASSERT(validTestParameterParser.getFlag('g').value);
     ASSERT(validTestParameterParser.getFlag(std::string("ggggg")).value);
-    ASSERT(!validTestParameterParser.getUnpositionalArgument('h').isError);
-    ASSERT(validTestParameterParser.getUnpositionalArgument('h').value==std::string("concatenated-separate-value"));
-    ASSERT(validTestParameterParser.getUnpositionalArgument(std::string("hhhhh")).value==std::string("concatenated-separate-value"));
-    ASSERT(!validTestParameterParser.getUnpositionalArgument('x').isError);
-    ASSERT(validTestParameterParser.getUnpositionalArgument('x').value==std::string("included value"));
-    ASSERT(validTestParameterParser.getUnpositionalArgument(std::string("long-argument-with-value-included")).value==std::string("included value"));
-    ASSERT(!validTestParameterParser.getUnpositionalArgument('y').isError);
-    ASSERT(validTestParameterParser.getUnpositionalArgument('y').value==std::string("separate value"));
-    ASSERT(validTestParameterParser.getUnpositionalArgument(std::string("long-argument-with-value-separated")).value==std::string("separate value"));
-    ASSERT(!validTestParameterParser.getPositionalArgument(1).isError);
-    ASSERT(validTestParameterParser.getPositionalArgument(1).value=="positional argument 1");
-    ASSERT(!validTestParameterParser.getPositionalArgument(2).isError);
-    ASSERT(validTestParameterParser.getPositionalArgument(2).value=="positional argument 2");
-    ASSERT(!validTestParameterParser.getUnpositionalArgument('z').isError);
-    ASSERT(validTestParameterParser.getUnpositionalArgument('z').errorCode == ErrorCodes::NOT_PRESENT);
-    ASSERT(validTestParameterParser.getUnpositionalArgument('z').value == std::string(""));
+    ASSERT(!validTestParameterParser.getOption('h').isError);
+    ASSERT(validTestParameterParser.getOption('h').value==std::string("concatenated-separate-value"));
+    ASSERT(validTestParameterParser.getOption(std::string("hhhhh")).value==std::string("concatenated-separate-value"));
+    ASSERT(!validTestParameterParser.getOption('x').isError);
+    ASSERT(validTestParameterParser.getOption('x').value==std::string("included value"));
+    ASSERT(validTestParameterParser.getOption(std::string("long-argument-with-value-included")).value==std::string("included value"));
+    ASSERT(!validTestParameterParser.getOption('y').isError);
+    ASSERT(validTestParameterParser.getOption('y').value==std::string("separate value"));
+    ASSERT(validTestParameterParser.getOption(std::string("long-argument-with-value-separated")).value==std::string("separate value"));
+    ASSERT(!validTestParameterParser.getArgument(1).isError);
+    ASSERT(validTestParameterParser.getArgument(1).value=="argument 1");
+    ASSERT(!validTestParameterParser.getArgument(2).isError);
+    ASSERT(validTestParameterParser.getArgument(2).value=="argument 2");
+    ASSERT(!validTestParameterParser.getOption('z').isError);
+    ASSERT(validTestParameterParser.getOption('z').errorCode == ErrorCodes::NOT_PRESENT);
+    ASSERT(validTestParameterParser.getOption('z').value == std::string(""));
+    ASSERT(validTestParameterParser.wrongUsageMessages.size() == 0);
 
     delete[] validTestParameterList;
-    std::cout << "Passed valid input test." << std::endl;
+    std::cout << "Passed valid command line test." << std::endl;
 
     // empty input (valid and invalid) #################################
     std::vector<CLI::Flag> emptyTestFlags;
 
-    std::vector<CLI::UnpositionalArgument> emptyTestUnpositionalArguments;
+    std::vector<CLI::Option> emptyTestOptions;
 
-    std::vector<CLI::PositionalArgument> emptyTestPositionalArguments;
+    std::vector<CLI::Argument> emptyTestArguments;
 
     const char** emptyTestParameterList = new const char*[1];
     // The command is always a part of a command line, even if it is empty
@@ -167,27 +168,26 @@ int main(int argc, char* argv[]) {
     int emptyTestParameterCount = 1;
 
     // valid
-    CLI::ArgumentsParser validEmptyTestParameterParser = CLI::ArgumentsParser(emptyTestParameterCount, emptyTestParameterList, emptyTestFlags, emptyTestUnpositionalArguments, emptyTestPositionalArguments);
+    CLI::ArgumentsParser validEmptyTestParameterParser = CLI::ArgumentsParser(emptyTestParameterCount, emptyTestParameterList, emptyTestFlags, emptyTestOptions, emptyTestArguments);
     ASSERT(!validEmptyTestParameterParser.wrongUsage);
     ASSERT(validEmptyTestParameterParser.programName == std::string("test"));
+    ASSERT(validEmptyTestParameterParser.wrongUsageMessages.size() == 0);
 
     //invalid
-    emptyTestPositionalArguments.push_back(CLI::PositionalArgument("argument", "positional argument"));
+    emptyTestArguments.push_back(CLI::Argument("argument", "argument"));
 
-    CLI::ArgumentsParser invalidEmptyTestParameterParser = CLI::ArgumentsParser(emptyTestParameterCount, emptyTestParameterList, emptyTestFlags, emptyTestUnpositionalArguments, emptyTestPositionalArguments);
+    CLI::ArgumentsParser invalidEmptyTestParameterParser = CLI::ArgumentsParser(emptyTestParameterCount, emptyTestParameterList, emptyTestFlags, emptyTestOptions, emptyTestArguments);
     ASSERT(invalidEmptyTestParameterParser.wrongUsage);
     ASSERT(invalidEmptyTestParameterParser.programName == std::string("test"));
-    ASSERT(invalidEmptyTestParameterParser.getPositionalArgument(0).isError);
-    ASSERT(invalidEmptyTestParameterParser.getPositionalArgument(0).errorCode == ErrorCodes::NOT_PRESENT);
+    ASSERT(invalidEmptyTestParameterParser.getArgument(0).isError);
+    ASSERT(invalidEmptyTestParameterParser.getArgument(0).errorCode == ErrorCodes::NOT_PRESENT);
+    ASSERT(invalidEmptyTestParameterParser.wrongUsageMessages.size() == 1);
+    ASSERT(invalidEmptyTestParameterParser.wrongUsageMessages.at(0) == "Too few arguments! Missing: argument");
 
     delete[] emptyTestParameterList;
-    std::cout << "Passed empty input test." << std::endl;
+    std::cout << "Passed empty command line test." << std::endl;
 
-    //TODO add tests for invalid input
-    // test cases for invalid input:
-    //  - unknown flags, arguments (mixed with other input and standalone)
-    //  - too few, too many positional arguments (mixed with other input and standalone)
-    //  - check the produced error messages
+    // unknown flag ####################################################
 
     std::vector<CLI::Flag> unknownFlagTestFlags;
     unknownFlagTestFlags.push_back(CLI::Flag('0', "zero", "test flag"));
@@ -197,11 +197,11 @@ int main(int argc, char* argv[]) {
     unknownFlagTestFlags.push_back(CLI::Flag('4', "four", "test flag"));
     unknownFlagTestFlags.push_back(CLI::Flag('5', "five", "test flag"));
 
-    std::vector<CLI::UnpositionalArgument> unknownFlagTestUnpositionalArguments;
+    std::vector<CLI::Option> unknownFlagTestOptions;
 
-    std::vector<CLI::PositionalArgument> unknownFlagTestPositionalArguments;
+    std::vector<CLI::Argument> unknownFlagTestArguments;
 
-    const char** unknownFlagTestParameterList = new const char*[3];
+    const char** unknownFlagTestParameterList = new const char*[7];
     unknownFlagTestParameterList[0] = "test";
     unknownFlagTestParameterList[1] = "-a";
     unknownFlagTestParameterList[2] = "-1";
@@ -211,20 +211,554 @@ int main(int argc, char* argv[]) {
     unknownFlagTestParameterList[6] = "-5";
     int unknownFlagStandaloneTestParameterCount = 2;
 
-    CLI::ArgumentsParser unknownFlagStandaloneTestParser = CLI::ArgumentsParser(unknownFlagStandaloneTestParameterCount, unknownFlagTestParameterList, unknownFlagTestFlags, unknownFlagTestUnpositionalArguments, unknownFlagTestPositionalArguments);
+    CLI::ArgumentsParser unknownFlagStandaloneTestParser = CLI::ArgumentsParser(unknownFlagStandaloneTestParameterCount, unknownFlagTestParameterList, unknownFlagTestFlags, unknownFlagTestOptions, unknownFlagTestArguments);
     ASSERT(unknownFlagStandaloneTestParser.getFlag('1').isError);
     ASSERT(unknownFlagStandaloneTestParser.getFlag('1').errorCode == ErrorCodes::NOT_PRESENT);
     ASSERT(!unknownFlagStandaloneTestParser.getFlag('1').value);
+    ASSERT(unknownFlagStandaloneTestParser.getFlag(std::string("four")).isError);
+    ASSERT(unknownFlagStandaloneTestParser.getFlag(std::string("four")).errorCode == ErrorCodes::NOT_PRESENT);
+    ASSERT(!unknownFlagStandaloneTestParser.getFlag(std::string("four")).value);
+    ASSERT(unknownFlagStandaloneTestParser.wrongUsageMessages.size() == 1);
+    ASSERT(unknownFlagStandaloneTestParser.wrongUsageMessages.at(0) == "Unknown argument or flag(s): a");
 
     int unknownFlagMixedTestParameterCount = 7;
 
-    CLI::ArgumentsParser unknownFlagMixedTestParser = CLI::ArgumentsParser(unknownFlagMixedTestParameterCount, unknownFlagTestParameterList, unknownFlagTestFlags, unknownFlagTestUnpositionalArguments, unknownFlagTestPositionalArguments);
+    CLI::ArgumentsParser unknownFlagMixedTestParser = CLI::ArgumentsParser(unknownFlagMixedTestParameterCount, unknownFlagTestParameterList, unknownFlagTestFlags, unknownFlagTestOptions, unknownFlagTestArguments);
     ASSERT(unknownFlagMixedTestParser.getFlag('1').isError);
     ASSERT(unknownFlagMixedTestParser.getFlag('1').errorCode == ErrorCodes::WRONG_USAGE);
     ASSERT(unknownFlagMixedTestParser.getFlag('1').value);
+    ASSERT(unknownFlagMixedTestParser.getFlag(std::string("four")).isError);
+    ASSERT(unknownFlagMixedTestParser.getFlag(std::string("four")).errorCode == ErrorCodes::WRONG_USAGE);
+    ASSERT(unknownFlagMixedTestParser.getFlag(std::string("four")).value);
+    ASSERT(unknownFlagMixedTestParser.wrongUsageMessages.size() == 1);
+    ASSERT(unknownFlagMixedTestParser.wrongUsageMessages.at(0) == "Unknown argument or flag(s): a");
 
     delete[] unknownFlagTestParameterList;
+
+    std::vector<CLI::Flag> unknownLongFlagTestFlags;
+    unknownLongFlagTestFlags.push_back(CLI::Flag('0', "zero", "test flag"));
+    unknownLongFlagTestFlags.push_back(CLI::Flag('1', "one",  "test flag"));
+    unknownLongFlagTestFlags.push_back(CLI::Flag('2', "two",  "test flag"));
+    unknownLongFlagTestFlags.push_back(CLI::Flag('3', "three","test flag"));
+    unknownLongFlagTestFlags.push_back(CLI::Flag('4', "four", "test flag"));
+    unknownLongFlagTestFlags.push_back(CLI::Flag('5', "five", "test flag"));
+
+    std::vector<CLI::Option> unknownLongFlagTestOptions;
+
+    std::vector<CLI::Argument> unknownLongFlagTestArguments;
+
+    const char** unknownLongFlagTestParameterList = new const char*[7];
+    unknownLongFlagTestParameterList[0] = "test";
+    unknownLongFlagTestParameterList[1] = "--a";
+    unknownLongFlagTestParameterList[2] = "-1";
+    unknownLongFlagTestParameterList[3] = "-2";
+    unknownLongFlagTestParameterList[4] = "-3";
+    unknownLongFlagTestParameterList[5] = "-4";
+    unknownLongFlagTestParameterList[6] = "-5";
+    int unknownLongFlagStandaloneTestParameterCount = 2;
+
+    CLI::ArgumentsParser unknownLongFlagStandaloneTestParser = CLI::ArgumentsParser(unknownLongFlagStandaloneTestParameterCount, unknownLongFlagTestParameterList, unknownLongFlagTestFlags, unknownLongFlagTestOptions, unknownLongFlagTestArguments);
+    ASSERT(unknownLongFlagStandaloneTestParser.getFlag('1').isError);
+    ASSERT(unknownLongFlagStandaloneTestParser.getFlag('1').errorCode == ErrorCodes::NOT_PRESENT);
+    ASSERT(!unknownLongFlagStandaloneTestParser.getFlag('1').value);
+    ASSERT(unknownLongFlagStandaloneTestParser.getFlag(std::string("four")).isError);
+    ASSERT(unknownLongFlagStandaloneTestParser.getFlag(std::string("four")).errorCode == ErrorCodes::NOT_PRESENT);
+    ASSERT(!unknownLongFlagStandaloneTestParser.getFlag(std::string("four")).value);
+    ASSERT(unknownLongFlagStandaloneTestParser.wrongUsageMessages.size() == 1);
+    ASSERT(unknownLongFlagStandaloneTestParser.wrongUsageMessages.at(0) == "Unknown argument or flag: --a");
+
+    int unknownLongFlagMixedTestParameterCount = 7;
+
+    CLI::ArgumentsParser unknownLongFlagMixedTestParser = CLI::ArgumentsParser(unknownLongFlagMixedTestParameterCount, unknownLongFlagTestParameterList, unknownLongFlagTestFlags, unknownLongFlagTestOptions, unknownLongFlagTestArguments);
+    ASSERT(unknownLongFlagMixedTestParser.getFlag('1').isError);
+    ASSERT(unknownLongFlagMixedTestParser.getFlag('1').errorCode == ErrorCodes::WRONG_USAGE);
+    ASSERT(unknownLongFlagMixedTestParser.getFlag('1').value);
+    ASSERT(unknownLongFlagMixedTestParser.getFlag(std::string("four")).isError);
+    ASSERT(unknownLongFlagMixedTestParser.getFlag(std::string("four")).errorCode == ErrorCodes::WRONG_USAGE);
+    ASSERT(unknownLongFlagMixedTestParser.getFlag(std::string("four")).value);
+    ASSERT(unknownLongFlagMixedTestParser.wrongUsageMessages.size() == 1);
+    ASSERT(unknownLongFlagMixedTestParser.wrongUsageMessages.at(0) == "Unknown argument or flag: --a");
+
+    delete[] unknownLongFlagTestParameterList;
     std::cout << "Passed unknown flag test." << std::endl;
 
+    // unknown argument ################################################
+
+    std::vector<CLI::Flag> unknownOptionTestFlags;
+
+    std::vector<CLI::Option> unknownOptionTestOptions;
+    unknownOptionTestOptions.push_back(CLI::Option('0', "zero", "zero", "test argument"));
+    unknownOptionTestOptions.push_back(CLI::Option('1', "one",  "one",  "test argument"));
+    unknownOptionTestOptions.push_back(CLI::Option('2', "two",  "two",  "test argument"));
+    unknownOptionTestOptions.push_back(CLI::Option('3', "three","three","test argument"));
+    unknownOptionTestOptions.push_back(CLI::Option('4', "four", "four", "test argument"));
+    unknownOptionTestOptions.push_back(CLI::Option('5', "five", "five", "test argument"));
+
+    std::vector<CLI::Argument> unknownOptionTestArguments;
+
+    const char** unknownOptionTestParameterList = new const char*[7];
+    unknownOptionTestParameterList[0] = "test";
+    unknownOptionTestParameterList[1] = "-a123";
+    unknownOptionTestParameterList[2] = "-1a";
+    unknownOptionTestParameterList[3] = "-2b";
+    unknownOptionTestParameterList[4] = "-3c";
+    unknownOptionTestParameterList[5] = "-4d";
+    unknownOptionTestParameterList[6] = "-5e";
+    int unknownOptionStandaloneTestParameterCount = 2;
+
+    CLI::ArgumentsParser unknownOptionStandaloneTestParser = CLI::ArgumentsParser(unknownOptionStandaloneTestParameterCount, unknownOptionTestParameterList, unknownOptionTestFlags, unknownOptionTestOptions, unknownOptionTestArguments);
+    ASSERT(unknownOptionStandaloneTestParser.getOption('1').isError);
+    ASSERT(unknownOptionStandaloneTestParser.getOption('1').errorCode == ErrorCodes::NOT_PRESENT);
+    ASSERT(unknownOptionStandaloneTestParser.getOption('1').value == "");
+    ASSERT(unknownOptionStandaloneTestParser.getOption(std::string("four")).isError);
+    ASSERT(unknownOptionStandaloneTestParser.getOption(std::string("four")).errorCode == ErrorCodes::NOT_PRESENT);
+    ASSERT(unknownOptionStandaloneTestParser.getOption(std::string("four")).value == "");
+    ASSERT(unknownOptionStandaloneTestParser.wrongUsageMessages.size() == 1);
+    ASSERT(unknownOptionStandaloneTestParser.wrongUsageMessages.at(0) == "Unknown argument or flag(s): a123");
+
+    int unknownOptionMixedTestParameterCount = 7;
+
+    CLI::ArgumentsParser unknownOptionMixedTestParser = CLI::ArgumentsParser(unknownOptionMixedTestParameterCount, unknownOptionTestParameterList, unknownOptionTestFlags, unknownOptionTestOptions, unknownOptionTestArguments);
+    ASSERT(unknownOptionMixedTestParser.getOption('1').isError);
+    ASSERT(unknownOptionMixedTestParser.getOption('1').errorCode == ErrorCodes::WRONG_USAGE);
+    ASSERT(unknownOptionMixedTestParser.getOption('1').value == "a");
+    ASSERT(unknownOptionMixedTestParser.getOption(std::string("four")).isError);
+    ASSERT(unknownOptionMixedTestParser.getOption(std::string("four")).errorCode == ErrorCodes::WRONG_USAGE);
+    ASSERT(unknownOptionMixedTestParser.getOption(std::string("four")).value == "d");
+    ASSERT(unknownOptionMixedTestParser.wrongUsageMessages.size() == 1);
+    ASSERT(unknownOptionMixedTestParser.wrongUsageMessages.at(0) == "Unknown argument or flag(s): a123");
+
+    delete[] unknownOptionTestParameterList;
+
+    std::vector<CLI::Flag> unknownLongOptionTestFlags;
+
+    std::vector<CLI::Option> unknownLongOptionTestOptions;
+    unknownLongOptionTestOptions.push_back(CLI::Option('0', "zero", "zero", "test argument"));
+    unknownLongOptionTestOptions.push_back(CLI::Option('1', "one",  "one",  "test argument"));
+    unknownLongOptionTestOptions.push_back(CLI::Option('2', "two",  "two",  "test argument"));
+    unknownLongOptionTestOptions.push_back(CLI::Option('3', "three","three","test argument"));
+    unknownLongOptionTestOptions.push_back(CLI::Option('4', "four", "four", "test argument"));
+    unknownLongOptionTestOptions.push_back(CLI::Option('5', "five", "five", "test argument"));
+
+    std::vector<CLI::Argument> unknownLongOptionTestArguments;
+
+    const char** unknownLongOptionTestParameterList = new const char*[7];
+    unknownLongOptionTestParameterList[0] = "test";
+    unknownLongOptionTestParameterList[1] = "--a=123";
+    unknownLongOptionTestParameterList[2] = "-1a";
+    unknownLongOptionTestParameterList[3] = "-2b";
+    unknownLongOptionTestParameterList[4] = "-3c";
+    unknownLongOptionTestParameterList[5] = "-4d";
+    unknownLongOptionTestParameterList[6] = "-5e";
+    int unknownLongOptionStandaloneTestParameterCount = 2;
+
+    CLI::ArgumentsParser unknownLongOptionStandaloneTestParser = CLI::ArgumentsParser(unknownLongOptionStandaloneTestParameterCount, unknownLongOptionTestParameterList, unknownLongOptionTestFlags, unknownLongOptionTestOptions, unknownLongOptionTestArguments);
+    ASSERT(unknownLongOptionStandaloneTestParser.getOption('1').isError);
+    ASSERT(unknownLongOptionStandaloneTestParser.getOption('1').errorCode == ErrorCodes::NOT_PRESENT);
+    ASSERT(unknownLongOptionStandaloneTestParser.getOption('1').value == "");
+    ASSERT(unknownLongOptionStandaloneTestParser.getOption(std::string("four")).isError);
+    ASSERT(unknownLongOptionStandaloneTestParser.getOption(std::string("four")).errorCode == ErrorCodes::NOT_PRESENT);
+    ASSERT(unknownLongOptionStandaloneTestParser.getOption(std::string("four")).value == "");
+    ASSERT(unknownLongOptionStandaloneTestParser.wrongUsageMessages.size() == 1);
+    ASSERT(unknownLongOptionStandaloneTestParser.wrongUsageMessages.at(0) == "Unknown argument (or it's a flag that doesn't take a value): --a=123");
+
+    int unknownLongOptionMixedTestParameterCount = 7;
+
+    CLI::ArgumentsParser unknownLongOptionMixedTestParser = CLI::ArgumentsParser(unknownLongOptionMixedTestParameterCount, unknownLongOptionTestParameterList, unknownLongOptionTestFlags, unknownLongOptionTestOptions, unknownLongOptionTestArguments);
+    ASSERT(unknownLongOptionMixedTestParser.getOption('1').isError);
+    ASSERT(unknownLongOptionMixedTestParser.getOption('1').errorCode == ErrorCodes::WRONG_USAGE);
+    ASSERT(unknownLongOptionMixedTestParser.getOption('1').value == "a");
+    ASSERT(unknownLongOptionMixedTestParser.getOption(std::string("four")).isError);
+    ASSERT(unknownLongOptionMixedTestParser.getOption(std::string("four")).errorCode == ErrorCodes::WRONG_USAGE);
+    ASSERT(unknownLongOptionMixedTestParser.getOption(std::string("four")).value == "d");
+    ASSERT(unknownLongOptionMixedTestParser.wrongUsageMessages.size() == 1);
+    ASSERT(unknownLongOptionMixedTestParser.wrongUsageMessages.at(0) == "Unknown argument (or it's a flag that doesn't take a value): --a=123");
+
+    delete[] unknownLongOptionTestParameterList;
+    std::cout << "Passed unknown option test." << std::endl;
+
+    // incomplete option ###############################################
+
+    std::vector<CLI::Flag> incompleteOptionTestFlags;
+
+    std::vector<CLI::Option> incompleteOptionTestOptions;
+    incompleteOptionTestOptions.push_back(CLI::Option('0', "zero", "zero", "test option"));
+    incompleteOptionTestOptions.push_back(CLI::Option('1', "one",  "one",  "test option"));
+    incompleteOptionTestOptions.push_back(CLI::Option('2', "two",  "two",  "test option"));
+    incompleteOptionTestOptions.push_back(CLI::Option('3', "three","three","test option"));
+    incompleteOptionTestOptions.push_back(CLI::Option('4', "four", "four", "test option"));
+    incompleteOptionTestOptions.push_back(CLI::Option('5', "five", "five", "test option"));
+
+    std::vector<CLI::Argument> incompleteOptionTestArguments;
+
+    const char** incompleteOptionTestParameterList = new const char*[6];
+    incompleteOptionTestParameterList[0] = "test";
+    incompleteOptionTestParameterList[1] = "-1";
+    incompleteOptionTestParameterList[2] = "--two="; // value ""
+    incompleteOptionTestParameterList[3] = "-3c";
+    incompleteOptionTestParameterList[4] = "-4";
+    incompleteOptionTestParameterList[5] = "-5e";
+    int incompleteOptionStandaloneTestParameterCount = 2;
+
+    CLI::ArgumentsParser incompleteOptionStandaloneTestParser = CLI::ArgumentsParser(incompleteOptionStandaloneTestParameterCount, incompleteOptionTestParameterList, incompleteOptionTestFlags, incompleteOptionTestOptions, incompleteOptionTestArguments);
+    ASSERT(incompleteOptionStandaloneTestParser.getOption('1').isError);
+    ASSERT(incompleteOptionStandaloneTestParser.getOption('1').errorCode == ErrorCodes::WRONG_USAGE);
+    ASSERT(incompleteOptionStandaloneTestParser.getOption('1').value == "");
+    ASSERT(incompleteOptionStandaloneTestParser.getOption(std::string("four")).isError);
+    ASSERT(incompleteOptionStandaloneTestParser.getOption(std::string("four")).errorCode == ErrorCodes::NOT_PRESENT);
+    ASSERT(incompleteOptionStandaloneTestParser.getOption(std::string("four")).value == "");
+    ASSERT(incompleteOptionStandaloneTestParser.wrongUsageMessages.size() == 1);
+    ASSERT(incompleteOptionStandaloneTestParser.wrongUsageMessages.at(0) == "Argument expects value but has none: one");
+
+    int incompleteOptionMixedTestParameterCount = 6;
+
+    CLI::ArgumentsParser incompleteOptionMixedTestParser = CLI::ArgumentsParser(incompleteOptionMixedTestParameterCount, incompleteOptionTestParameterList, incompleteOptionTestFlags, incompleteOptionTestOptions, incompleteOptionTestArguments);
+    ASSERT(incompleteOptionMixedTestParser.getOption('1').isError);
+    ASSERT(incompleteOptionMixedTestParser.getOption('1').errorCode == ErrorCodes::WRONG_USAGE);
+    ASSERT(incompleteOptionMixedTestParser.getOption('1').value == "");
+    ASSERT(incompleteOptionMixedTestParser.getOption(std::string("four")).isError);
+    ASSERT(incompleteOptionMixedTestParser.getOption(std::string("four")).errorCode == ErrorCodes::WRONG_USAGE);
+    ASSERT(incompleteOptionMixedTestParser.getOption(std::string("four")).value == "");
+    ASSERT(incompleteOptionMixedTestParser.getOption('5').isError);
+    ASSERT(incompleteOptionMixedTestParser.getOption('5').errorCode == ErrorCodes::WRONG_USAGE);
+    ASSERT(incompleteOptionMixedTestParser.getOption('5').value == "e");
+    ASSERT(incompleteOptionMixedTestParser.wrongUsageMessages.size() == 2);
+    ASSERT(incompleteOptionMixedTestParser.wrongUsageMessages.at(0) == "Argument expects value but has none: one");
+    ASSERT(incompleteOptionMixedTestParser.wrongUsageMessages.at(1) == "Argument expects value but has none: four");
+
+    delete[] incompleteOptionTestParameterList;
+
+    std::vector<CLI::Flag> incompleteLongOptionTestFlags;
+
+    std::vector<CLI::Option> incompleteLongOptionTestOptions;
+    incompleteLongOptionTestOptions.push_back(CLI::Option('0', "zero", "zero", "test argument"));
+    incompleteLongOptionTestOptions.push_back(CLI::Option('1', "one",  "one",  "test argument"));
+    incompleteLongOptionTestOptions.push_back(CLI::Option('2', "two",  "two",  "test argument"));
+    incompleteLongOptionTestOptions.push_back(CLI::Option('3', "three","three","test argument"));
+    incompleteLongOptionTestOptions.push_back(CLI::Option('4', "four", "four", "test argument"));
+    incompleteLongOptionTestOptions.push_back(CLI::Option('5', "five", "five", "test argument"));
+
+    std::vector<CLI::Argument> incompleteLongOptionTestArguments;
+
+    const char** incompleteLongOptionTestParameterList = new const char*[8];
+    incompleteLongOptionTestParameterList[0] = "test";
+    incompleteLongOptionTestParameterList[1] = "--one";
+    incompleteLongOptionTestParameterList[2] = "--two";
+    incompleteLongOptionTestParameterList[3] = "b";
+    incompleteLongOptionTestParameterList[4] = "-3c";
+    incompleteLongOptionTestParameterList[5] = "arg";
+    incompleteLongOptionTestParameterList[6] = "--four";
+    incompleteLongOptionTestParameterList[7] = "--five=e";
+    int incompleteLongOptionStandaloneTestParameterCount = 2;
+
+    CLI::ArgumentsParser incompleteLongOptionStandaloneTestParser = CLI::ArgumentsParser(incompleteLongOptionStandaloneTestParameterCount, incompleteLongOptionTestParameterList, incompleteLongOptionTestFlags, incompleteLongOptionTestOptions, incompleteLongOptionTestArguments);
+    ASSERT(incompleteLongOptionStandaloneTestParser.getOption('1').isError);
+    ASSERT(incompleteLongOptionStandaloneTestParser.getOption('1').errorCode == ErrorCodes::WRONG_USAGE);
+    ASSERT(incompleteLongOptionStandaloneTestParser.getOption('1').value == "");
+    ASSERT(incompleteLongOptionStandaloneTestParser.getOption(std::string("four")).isError);
+    ASSERT(incompleteLongOptionStandaloneTestParser.getOption(std::string("four")).errorCode == ErrorCodes::NOT_PRESENT);
+    ASSERT(incompleteLongOptionStandaloneTestParser.getOption(std::string("four")).value == "");
+    ASSERT(incompleteLongOptionStandaloneTestParser.wrongUsageMessages.size() == 1);
+    ASSERT(incompleteLongOptionStandaloneTestParser.wrongUsageMessages.at(0) == "Argument expects value but has none: one");
+
+    int incompleteLongOptionMixedTestParameterCount = 8;
+    incompleteLongOptionTestArguments.push_back(CLI::Argument("arg", "argument"));
+
+    CLI::ArgumentsParser incompleteLongOptionMixedTestParser = CLI::ArgumentsParser(incompleteLongOptionMixedTestParameterCount, incompleteLongOptionTestParameterList, incompleteLongOptionTestFlags, incompleteLongOptionTestOptions, incompleteLongOptionTestArguments);
+    ASSERT(incompleteLongOptionMixedTestParser.getOption('1').isError);
+    ASSERT(incompleteLongOptionMixedTestParser.getOption('1').errorCode == ErrorCodes::WRONG_USAGE);
+    ASSERT(incompleteLongOptionMixedTestParser.getOption('1').value == "");
+    ASSERT(incompleteLongOptionMixedTestParser.getOption('2').isError);
+    ASSERT(incompleteLongOptionMixedTestParser.getOption('2').errorCode == ErrorCodes::WRONG_USAGE);
+    ASSERT(incompleteLongOptionMixedTestParser.getOption('2').value == "b");
+    ASSERT(incompleteLongOptionMixedTestParser.getOption(std::string("four")).isError);
+    ASSERT(incompleteLongOptionMixedTestParser.getOption(std::string("four")).errorCode == ErrorCodes::WRONG_USAGE);
+    ASSERT(incompleteLongOptionMixedTestParser.getOption(std::string("four")).value == "");
+    ASSERT(incompleteLongOptionMixedTestParser.getOption('5').isError);
+    ASSERT(incompleteLongOptionMixedTestParser.getOption('5').errorCode == ErrorCodes::WRONG_USAGE);
+    ASSERT(incompleteLongOptionMixedTestParser.getOption('5').value == "e");
+    ASSERT(incompleteLongOptionMixedTestParser.wrongUsageMessages.size() == 2);
+    ASSERT(incompleteLongOptionMixedTestParser.wrongUsageMessages.at(0) == "Argument expects value but has none: one");
+    ASSERT(incompleteLongOptionMixedTestParser.wrongUsageMessages.at(1) == "Argument expects value but has none: four");
+
+    delete[] incompleteLongOptionTestParameterList;
+    std::cout << "Passed incomplete option test." << std::endl;
+
+    // too few arguments ###############################################
+
+    std::vector<CLI::Flag> tooFewArgumentsTestFlags;
+    tooFewArgumentsTestFlags.push_back(CLI::Flag('a', "aaaaa", "test flag"));
+
+    std::vector<CLI::Option> tooFewArgumentsTestOptions;
+    tooFewArgumentsTestOptions.push_back(CLI::Option('b', "bbbbb", "b", "test argument"));
+    tooFewArgumentsTestOptions.push_back(CLI::Option('c', "ccccc", "c", "test argument"));
+    tooFewArgumentsTestOptions.push_back(CLI::Option('d', "ddddd", "d", "test argument"));
+
+    std::vector<CLI::Argument> tooFewArgumentsTestArguments;
+    tooFewArgumentsTestArguments.push_back(CLI::Argument("argument0", "test argument"));
+    tooFewArgumentsTestArguments.push_back(CLI::Argument("argument1", "test argument"));
+    tooFewArgumentsTestArguments.push_back(CLI::Argument("argument2", "test argument"));
+    tooFewArgumentsTestArguments.push_back(CLI::Argument("argument3", "test argument"));
+    tooFewArgumentsTestArguments.push_back(CLI::Argument("argument4", "test argument"));
+
+    const char** tooFewArgumentsTestParameterList = new const char*[10];
+    tooFewArgumentsTestParameterList[0] = "test";
+    tooFewArgumentsTestParameterList[1] = "arg_0";
+    tooFewArgumentsTestParameterList[2] = "-a";//
+    tooFewArgumentsTestParameterList[3] = "-b";
+    tooFewArgumentsTestParameterList[4] = "1";
+    tooFewArgumentsTestParameterList[5] = "-c5";
+    tooFewArgumentsTestParameterList[6] = "arg_1";
+    tooFewArgumentsTestParameterList[7] = "--ddddd";
+    tooFewArgumentsTestParameterList[8] = "ddd";
+    tooFewArgumentsTestParameterList[9] = "arg_2";
+
+    int tooFewArgumentsStandaloneTestParameterCount = 2;
+    CLI::ArgumentsParser tooFewArgumentsStandaloneTestParser = CLI::ArgumentsParser(tooFewArgumentsStandaloneTestParameterCount, tooFewArgumentsTestParameterList, tooFewArgumentsTestFlags, tooFewArgumentsTestOptions, tooFewArgumentsTestArguments);
+
+    ASSERT(tooFewArgumentsStandaloneTestParser.getArgument(0).isError);
+    ASSERT(tooFewArgumentsStandaloneTestParser.getArgument(0).errorCode == ErrorCodes::WRONG_USAGE);
+    ASSERT(tooFewArgumentsStandaloneTestParser.getArgument(0).value == "arg_0");
+    ASSERT(tooFewArgumentsStandaloneTestParser.getArgument(1).isError);
+    ASSERT(tooFewArgumentsStandaloneTestParser.getArgument(1).errorCode == ErrorCodes::NOT_PRESENT);
+    ASSERT(tooFewArgumentsStandaloneTestParser.getArgument(1).value == "");
+    ASSERT(tooFewArgumentsStandaloneTestParser.getOption('b').isError);
+    ASSERT(tooFewArgumentsStandaloneTestParser.getOption('b').errorCode == ErrorCodes::NOT_PRESENT);
+    ASSERT(tooFewArgumentsStandaloneTestParser.getOption('b').value == "");
+    ASSERT(tooFewArgumentsStandaloneTestParser.getOption('c').isError);
+    ASSERT(tooFewArgumentsStandaloneTestParser.getOption('c').errorCode == ErrorCodes::NOT_PRESENT);
+    ASSERT(tooFewArgumentsStandaloneTestParser.getOption('c').value == "");
+    ASSERT(tooFewArgumentsStandaloneTestParser.getOption('d').isError);
+    ASSERT(tooFewArgumentsStandaloneTestParser.getOption('d').errorCode == ErrorCodes::NOT_PRESENT);
+    ASSERT(tooFewArgumentsStandaloneTestParser.getOption('d').value == "");
+    ASSERT(tooFewArgumentsStandaloneTestParser.wrongUsageMessages.size() == 4);
+    ASSERT(tooFewArgumentsStandaloneTestParser.wrongUsageMessages.at(0) == "Too few arguments! Missing: argument1");
+    ASSERT(tooFewArgumentsStandaloneTestParser.wrongUsageMessages.at(1) == "Too few arguments! Missing: argument2");
+    ASSERT(tooFewArgumentsStandaloneTestParser.wrongUsageMessages.at(2) == "Too few arguments! Missing: argument3");
+    ASSERT(tooFewArgumentsStandaloneTestParser.wrongUsageMessages.at(3) == "Too few arguments! Missing: argument4");
+
+    int tooFewArgumentsMixedTestParameterCount = 10;
+    CLI::ArgumentsParser tooFewArgumentsMixedTestParser = CLI::ArgumentsParser(tooFewArgumentsMixedTestParameterCount, tooFewArgumentsTestParameterList, tooFewArgumentsTestFlags, tooFewArgumentsTestOptions, tooFewArgumentsTestArguments);
+
+    ASSERT(tooFewArgumentsMixedTestParser.getArgument(0).isError);
+    ASSERT(tooFewArgumentsMixedTestParser.getArgument(0).errorCode == ErrorCodes::WRONG_USAGE);
+    ASSERT(tooFewArgumentsMixedTestParser.getArgument(0).value == "arg_0");
+    ASSERT(tooFewArgumentsMixedTestParser.getArgument(1).isError);
+    ASSERT(tooFewArgumentsMixedTestParser.getArgument(1).errorCode == ErrorCodes::WRONG_USAGE);
+    ASSERT(tooFewArgumentsMixedTestParser.getArgument(1).value == "arg_1");
+    ASSERT(tooFewArgumentsMixedTestParser.getArgument(2).isError);
+    ASSERT(tooFewArgumentsMixedTestParser.getArgument(2).errorCode == ErrorCodes::WRONG_USAGE);
+    ASSERT(tooFewArgumentsMixedTestParser.getArgument(2).value == "arg_2");
+    ASSERT(tooFewArgumentsMixedTestParser.getArgument(3).isError);
+    ASSERT(tooFewArgumentsMixedTestParser.getArgument(3).errorCode == ErrorCodes::NOT_PRESENT);
+    ASSERT(tooFewArgumentsMixedTestParser.getArgument(3).value == "");
+    ASSERT(tooFewArgumentsMixedTestParser.getArgument(4).isError);
+    ASSERT(tooFewArgumentsMixedTestParser.getArgument(4).errorCode == ErrorCodes::NOT_PRESENT);
+    ASSERT(tooFewArgumentsMixedTestParser.getArgument(4).value == "");
+    ASSERT(tooFewArgumentsMixedTestParser.getOption('b').isError);
+    ASSERT(tooFewArgumentsMixedTestParser.getOption('b').errorCode == ErrorCodes::WRONG_USAGE);
+    ASSERT(tooFewArgumentsMixedTestParser.getOption('b').value == "1");
+    ASSERT(tooFewArgumentsMixedTestParser.getOption('c').isError);
+    ASSERT(tooFewArgumentsMixedTestParser.getOption('c').errorCode == ErrorCodes::WRONG_USAGE);
+    ASSERT(tooFewArgumentsMixedTestParser.getOption('c').value == "5");
+    ASSERT(tooFewArgumentsMixedTestParser.getOption('d').isError);
+    ASSERT(tooFewArgumentsMixedTestParser.getOption('d').errorCode == ErrorCodes::WRONG_USAGE);
+    ASSERT(tooFewArgumentsMixedTestParser.getOption('d').value == "ddd");
+    ASSERT(tooFewArgumentsMixedTestParser.wrongUsageMessages.size() == 2);
+    ASSERT(tooFewArgumentsMixedTestParser.wrongUsageMessages.at(0) == "Too few arguments! Missing: argument3");
+    ASSERT(tooFewArgumentsMixedTestParser.wrongUsageMessages.at(1) == "Too few arguments! Missing: argument4");
+
+    delete[] tooFewArgumentsTestParameterList;
+    std::cout << "Passed too few arguments test." << std::endl;
+
+    // too many arguments ##############################################
+
+    std::vector<CLI::Flag> tooManyArgumentsTestFlags;
+    tooManyArgumentsTestFlags.push_back(CLI::Flag('a', "aaaaa", "test flag"));
+
+    std::vector<CLI::Option> tooManyArgumentsTestOptions;
+    tooManyArgumentsTestOptions.push_back(CLI::Option('b', "bbbbb", "b", "test argument"));
+    tooManyArgumentsTestOptions.push_back(CLI::Option('c', "ccccc", "c", "test argument"));
+    tooManyArgumentsTestOptions.push_back(CLI::Option('d', "ddddd", "d", "test argument"));
+
+    std::vector<CLI::Argument> tooManyArgumentsTestArguments;
+    tooManyArgumentsTestArguments.push_back(CLI::Argument("argument0", "test argument"));
+
+    const char** tooManyArgumentsTestParameterList = new const char*[10];
+    tooManyArgumentsTestParameterList[0] = "test";
+    tooManyArgumentsTestParameterList[1] = "arg_0";
+    tooManyArgumentsTestParameterList[2] = "arg_1";
+    tooManyArgumentsTestParameterList[3] = "-a";//
+    tooManyArgumentsTestParameterList[4] = "-b";
+    tooManyArgumentsTestParameterList[5] = "1";
+    tooManyArgumentsTestParameterList[6] = "-c5";
+    tooManyArgumentsTestParameterList[7] = "--ddddd";
+    tooManyArgumentsTestParameterList[8] = "ddd";
+    tooManyArgumentsTestParameterList[9] = "arg_2";
+
+    int tooManyArgumentsStandaloneTestParameterCount = 3;
+    CLI::ArgumentsParser tooManyArgumentsStandaloneTestParser = CLI::ArgumentsParser(tooManyArgumentsStandaloneTestParameterCount, tooManyArgumentsTestParameterList, tooManyArgumentsTestFlags, tooManyArgumentsTestOptions, tooManyArgumentsTestArguments);
+
+    ASSERT(tooManyArgumentsStandaloneTestParser.getArgument(0).isError);
+    ASSERT(tooManyArgumentsStandaloneTestParser.getArgument(0).errorCode == ErrorCodes::WRONG_USAGE);
+    ASSERT(tooManyArgumentsStandaloneTestParser.getArgument(0).value == "arg_0");
+    ASSERT(tooManyArgumentsStandaloneTestParser.getOption('b').isError);
+    ASSERT(tooManyArgumentsStandaloneTestParser.getOption('b').errorCode == ErrorCodes::NOT_PRESENT);
+    ASSERT(tooManyArgumentsStandaloneTestParser.getOption('b').value == "");
+    ASSERT(tooManyArgumentsStandaloneTestParser.getOption('c').isError);
+    ASSERT(tooManyArgumentsStandaloneTestParser.getOption('c').errorCode == ErrorCodes::NOT_PRESENT);
+    ASSERT(tooManyArgumentsStandaloneTestParser.getOption('c').value == "");
+    ASSERT(tooManyArgumentsStandaloneTestParser.getOption('d').isError);
+    ASSERT(tooManyArgumentsStandaloneTestParser.getOption('d').errorCode == ErrorCodes::NOT_PRESENT);
+    ASSERT(tooManyArgumentsStandaloneTestParser.getOption('d').value == "");
+    ASSERT(tooManyArgumentsStandaloneTestParser.wrongUsageMessages.size() == 1);
+    ASSERT(tooManyArgumentsStandaloneTestParser.wrongUsageMessages.at(0) == "Too many arguments! Unexpected encounter of: arg_1");
+
+    int tooManyArgumentsMixedTestParameterCount = 10;
+    CLI::ArgumentsParser tooManyArgumentsMixedTestParser = CLI::ArgumentsParser(tooManyArgumentsMixedTestParameterCount, tooManyArgumentsTestParameterList, tooManyArgumentsTestFlags, tooManyArgumentsTestOptions, tooManyArgumentsTestArguments);
+
+    ASSERT(tooManyArgumentsMixedTestParser.getArgument(0).isError);
+    ASSERT(tooManyArgumentsMixedTestParser.getArgument(0).errorCode == ErrorCodes::WRONG_USAGE);
+    ASSERT(tooManyArgumentsMixedTestParser.getArgument(0).value == "arg_0");
+    ASSERT(tooManyArgumentsMixedTestParser.getOption('b').isError);
+    ASSERT(tooManyArgumentsMixedTestParser.getOption('b').errorCode == ErrorCodes::WRONG_USAGE);
+    ASSERT(tooManyArgumentsMixedTestParser.getOption('b').value == "1");
+    ASSERT(tooManyArgumentsMixedTestParser.getOption('c').isError);
+    ASSERT(tooManyArgumentsMixedTestParser.getOption('c').errorCode == ErrorCodes::WRONG_USAGE);
+    ASSERT(tooManyArgumentsMixedTestParser.getOption('c').value == "5");
+    ASSERT(tooManyArgumentsMixedTestParser.getOption('d').isError);
+    ASSERT(tooManyArgumentsMixedTestParser.getOption('d').errorCode == ErrorCodes::WRONG_USAGE);
+    ASSERT(tooManyArgumentsMixedTestParser.getOption('d').value == "ddd");
+    ASSERT(tooManyArgumentsMixedTestParser.wrongUsageMessages.size() == 2);
+    ASSERT(tooManyArgumentsMixedTestParser.wrongUsageMessages.at(0) == "Too many arguments! Unexpected encounter of: arg_1");
+    ASSERT(tooManyArgumentsMixedTestParser.wrongUsageMessages.at(1) == "Too many arguments! Unexpected encounter of: arg_2");
+
+    delete[] tooManyArgumentsTestParameterList;
+    std::cout << "Passed too many arguments test." << std::endl;
+
+    std::cout << "################################################################################" << std::endl;
+    std::cout << "CLI argument parser help tests" << std::endl;
+    std::cout << "################################################################################" << std::endl;
+
+    // normal usage with all types of CLI input ########################
+    std::vector<CLI::Flag> helpTestFlags;
+    helpTestFlags.push_back(CLI::Flag('a', "apple", "throws an apple on Newton's head."));
+    helpTestFlags.push_back(CLI::Flag('y', "yapple", "throws an yapple on Newton's head."));
+
+    std::vector<CLI::Option> helpTestOptions;
+    helpTestOptions.push_back(CLI::Option('b', "banana", "BANANA", "smack someone with a ripe banana."));
+    helpTestOptions.push_back(CLI::Option('c', "corn", "CORNHUBBBBB", "visit cornhub."));
+
+    std::vector<CLI::Argument> helpTestArguments;
+    helpTestArguments.push_back(CLI::Argument("WASH", "Number of times to wash my shark."));
+    helpTestArguments.push_back(CLI::Argument("SHAKE", "Number of times to shake fist at cloud."));
+
+    const char** helpTestCommand = new const char*[1];
+    helpTestCommand[0] = "universecreator";
+    CLI::ArgumentsParser helpTestParser = CLI::ArgumentsParser(1, helpTestCommand, helpTestFlags, helpTestOptions, helpTestArguments, "Create a universe with a banana and an apple.");
+
+    ASSERT(helpTestParser.getUsage() == "Help: universecreator\n\n\tCreate a universe with a banana and an apple.\n\nUsage: universecreator [-ay] [-b BANANA] [-c CORNHUBBBBB] WASH SHAKE \n\nFlags:\n\t-a, --apple\n\t\tthrows an apple on Newton's head.\n\t-y, --yapple\n\t\tthrows an yapple on Newton's head.\n\nOptions:\n\t-b BANANA, --banana=BANANA\n\t\tsmack someone with a ripe banana.\n\t-c CORNHUBBBBB, --corn=CORNHUBBBBB\n\t\tvisit cornhub.\n\nArguments:\n\tWASH\n\t\tNumber of times to wash my shark.\n\tSHAKE\n\t\tNumber of times to shake fist at cloud.\n");
+    std::cout << "Passed normal usage test." << std::endl;
+
+    // no description ##################################################
+    std::vector<CLI::Flag> usageOnlyTestFlags;
+    usageOnlyTestFlags.push_back(CLI::Flag('a', "apple", "throws an apple on Newton's head."));
+    usageOnlyTestFlags.push_back(CLI::Flag('y', "yapple", "throws an yapple on Newton's head."));
+
+    std::vector<CLI::Option> usageOnlyTestOptions;
+    usageOnlyTestOptions.push_back(CLI::Option('b', "banana", "BANANA", "smack someone with a ripe banana."));
+    usageOnlyTestOptions.push_back(CLI::Option('c', "corn", "CORNHUBBBBB", "visit cornhub."));
+
+    std::vector<CLI::Argument> usageOnlyTestArguments;
+    usageOnlyTestArguments.push_back(CLI::Argument("WASH", "Number of times to wash my shark."));
+    usageOnlyTestArguments.push_back(CLI::Argument("SHAKE", "Number of times to shake fist at cloud."));
+
+    const char** usageOnlyTestCommand = new const char*[1];
+    usageOnlyTestCommand[0] = "universecreator";
+    CLI::ArgumentsParser usageOnlyTestParser = CLI::ArgumentsParser(1, usageOnlyTestCommand, usageOnlyTestFlags, usageOnlyTestOptions, usageOnlyTestArguments);
+
+    ASSERT(usageOnlyTestParser.getUsage() == "Usage: universecreator [-ay] [-b BANANA] [-c CORNHUBBBBB] WASH SHAKE \n\nFlags:\n\t-a, --apple\n\t\tthrows an apple on Newton's head.\n\t-y, --yapple\n\t\tthrows an yapple on Newton's head.\n\nOptions:\n\t-b BANANA, --banana=BANANA\n\t\tsmack someone with a ripe banana.\n\t-c CORNHUBBBBB, --corn=CORNHUBBBBB\n\t\tvisit cornhub.\n\nArguments:\n\tWASH\n\t\tNumber of times to wash my shark.\n\tSHAKE\n\t\tNumber of times to shake fist at cloud.\n");
+    std::cout << "Passed normal usage without description test." << std::endl;
+
+    // no flags ########################################################
+    std::vector<CLI::Flag> noFlagsFlags;
+
+    std::vector<CLI::Option> noFlagsOptions;
+    noFlagsOptions.push_back(CLI::Option('b', "banana", "BANANA", "smack someone with a ripe banana."));
+    noFlagsOptions.push_back(CLI::Option('c', "corn", "CORNHUBBBBB", "visit cornhub."));
+
+    std::vector<CLI::Argument> noFlagsArguments;
+    noFlagsArguments.push_back(CLI::Argument("WASH", "Number of times to wash my shark."));
+    noFlagsArguments.push_back(CLI::Argument("SHAKE", "Number of times to shake fist at cloud."));
+
+    const char** noFlagsCommand = new const char*[1];
+    noFlagsCommand[0] = "universecreator";
+    CLI::ArgumentsParser noFlagsParser = CLI::ArgumentsParser(1, noFlagsCommand, noFlagsFlags, noFlagsOptions, noFlagsArguments, "Create a universe with a banana and an apple.");
+
+    ASSERT(noFlagsParser.getUsage() == "Help: universecreator\n\n\tCreate a universe with a banana and an apple.\n\nUsage: universecreator [-b BANANA] [-c CORNHUBBBBB] WASH SHAKE \n\nOptions:\n\t-b BANANA, --banana=BANANA\n\t\tsmack someone with a ripe banana.\n\t-c CORNHUBBBBB, --corn=CORNHUBBBBB\n\t\tvisit cornhub.\n\nArguments:\n\tWASH\n\t\tNumber of times to wash my shark.\n\tSHAKE\n\t\tNumber of times to shake fist at cloud.\n");
+
+    // no options ######################################################
+    std::vector<CLI::Flag> noOptionsFlags;
+    noOptionsFlags.push_back(CLI::Flag('a', "apple", "throws an apple on Newton's head."));
+    noOptionsFlags.push_back(CLI::Flag('y', "yapple", "throws an yapple on Newton's head."));
+
+    std::vector<CLI::Option> noOptionsOptions;
+
+    std::vector<CLI::Argument> noOptionsArguments;
+    noOptionsArguments.push_back(CLI::Argument("WASH", "Number of times to wash my shark."));
+    noOptionsArguments.push_back(CLI::Argument("SHAKE", "Number of times to shake fist at cloud."));
+
+    const char** noOptionsCommand = new const char*[1];
+    noOptionsCommand[0] = "universecreator";
+    CLI::ArgumentsParser noOptionsParser = CLI::ArgumentsParser(1, noOptionsCommand, noOptionsFlags, noOptionsOptions, noOptionsArguments, "Create a universe with a banana and an apple.");
+
+    ASSERT(noOptionsParser.getUsage() == "Help: universecreator\n\n\tCreate a universe with a banana and an apple.\n\nUsage: universecreator [-ay] WASH SHAKE \n\nFlags:\n\t-a, --apple\n\t\tthrows an apple on Newton's head.\n\t-y, --yapple\n\t\tthrows an yapple on Newton's head.\n\nArguments:\n\tWASH\n\t\tNumber of times to wash my shark.\n\tSHAKE\n\t\tNumber of times to shake fist at cloud.\n");
+
+    // no arguments ####################################################
+    std::vector<CLI::Flag> noArgumentsFlags;
+    noArgumentsFlags.push_back(CLI::Flag('a', "apple", "throws an apple on Newton's head."));
+    noArgumentsFlags.push_back(CLI::Flag('y', "yapple", "throws an yapple on Newton's head."));
+
+    std::vector<CLI::Option> noArgumentsOptions;
+    noArgumentsOptions.push_back(CLI::Option('b', "banana", "BANANA", "smack someone with a ripe banana."));
+    noArgumentsOptions.push_back(CLI::Option('c', "corn", "CORNHUBBBBB", "visit cornhub."));
+
+    std::vector<CLI::Argument> noArgumentsArguments;
+
+    const char** noArgumentsCommand = new const char*[1];
+    noArgumentsCommand[0] = "universecreator";
+    CLI::ArgumentsParser noArgumentsParser = CLI::ArgumentsParser(1, noArgumentsCommand, noArgumentsFlags, noArgumentsOptions, noArgumentsArguments, "Create a universe with a banana and an apple.");
+
+    ASSERT(noArgumentsParser.getUsage() == "Help: universecreator\n\n\tCreate a universe with a banana and an apple.\n\nUsage: universecreator [-ay] [-b BANANA] [-c CORNHUBBBBB] \n\nFlags:\n\t-a, --apple\n\t\tthrows an apple on Newton's head.\n\t-y, --yapple\n\t\tthrows an yapple on Newton's head.\n\nOptions:\n\t-b BANANA, --banana=BANANA\n\t\tsmack someone with a ripe banana.\n\t-c CORNHUBBBBB, --corn=CORNHUBBBBB\n\t\tvisit cornhub.\n");
+    std::cout << "Passed absent section usage test." << std::endl;
+
+    // no CLI input ####################################################
+    std::vector<CLI::Flag> noCLIFlags;
+
+    std::vector<CLI::Option> noCLIOptions;
+
+    std::vector<CLI::Argument> noCLIArguments;
+
+    const char** noCLICommand = new const char*[1];
+    noCLICommand[0] = "universecreator";
+    CLI::ArgumentsParser noCLIParser = CLI::ArgumentsParser(1, noCLICommand, noCLIFlags, noCLIOptions, noCLIArguments, "Create a universe with a banana and an apple.");
+
+    ASSERT(noCLIParser.getUsage() == "Help: universecreator\n\n\tCreate a universe with a banana and an apple.\n\nUsage: universecreator \n");
+    std::cout << "Passed no CLI input usage test." << std::endl;
+
+    // additional info test ############################################
+    std::vector<CLI::Flag> additionalInfoCLIFlags;
+
+    std::vector<CLI::Option> additionalInfoCLIOptions;
+
+    std::vector<CLI::Argument> additionalInfoCLIArguments;
+
+    const char** additionalInfoCLICommand = new const char*[1];
+    additionalInfoCLICommand[0] = "universecreator";
+    CLI::ArgumentsParser additionalInfoCLIParser = CLI::ArgumentsParser(1, additionalInfoCLICommand, additionalInfoCLIFlags, additionalInfoCLIOptions, additionalInfoCLIArguments, "Create a universe with a banana and an apple.", "Rick Astley was here.");
+
+    ASSERT(additionalInfoCLIParser.getUsage() == "Help: universecreator\n\n\tCreate a universe with a banana and an apple.\n\nUsage: universecreator \n\nAdditional Info:\n\n\tRick Astley was here.\n");
+    std::cout << "Passed additional info test." << std::endl;
+
     return 0;
 }

src/test/file.cpp

@@ -0,0 +1,183 @@
+// Copyright 2022, FOSS-VG Developers and Contributers
+//
+// This program is free software: you can redistribute it and/or modify it
+// under the terms of the GNU Affero General Public License as published
+// by the Free Software Foundation, version 3.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied
+// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// version 3 along with this program.
+// If not, see https://www.gnu.org/licenses/agpl-3.0.en.html
+
+#include <vector>
+#include "assert.hpp"
+#include "tinyutf8/tinyutf8.h"
+#include "../lib/file.hpp"
+
+int main(){
+    std::cout << "################################################################################" << std::endl;
+    std::cout << "File tests" << std::endl;
+    std::cout << "################################################################################" << std::endl;
+    File* file;
+
+    //readByte test
+    file = File::open("resources/unicode_data/normal_utf-8", 'r').value;
+    uint8_t byte = file->readByte().value;
+    ASSERT(byte == 'T');
+    std::cout << "Passed read byte test." << std::endl;
+
+    //read test
+    std::vector<uint8_t> bytes = file->read(5).value;
+    //cursorPosition has already moved forward by one
+    ASSERT(bytes == std::vector<uint8_t>({'e', 's', 't', ' ', 's'}));
+    std::cout << "Passed read test." << std::endl;
+
+    //readString test
+    tiny_utf8::string data = file->readString(5).value;
+    ASSERT(data == "tring");
+    std::cout << "Passed read string test." << std::endl;
+    file->close();
+    delete file;
+
+    //Write Tests
+    File *writeFile;
+    File *readFile;
+
+    //writeByte test
+    writeFile = File::open("resources/writeTest", 'w').value;
+    writeFile->writeByte('a');
+    writeFile->close();
+
+    readFile = File::open("resources/writeTest", 'r').value;
+    uint8_t testByte = readFile->readByte().value;
+    readFile->close();
+    ASSERT(testByte == 'a');
+    std::cout << "Passed write byte test." << std::endl;
+
+    //write test
+    writeFile->open();
+    writeFile->write(std::vector<uint8_t>({'a', 'b', 'c'}));
+    writeFile->close();
+
+    readFile->open();
+    readFile->cursorPosition = 0;
+    tiny_utf8::string testBytes = readFile->readString(3).value;
+    readFile->close();
+    ASSERT(testBytes == "abc");
+    std::cout << "Passed write test." << std::endl;
+
+    writeFile->open();
+    writeFile->writeString(tiny_utf8::string("Hallo"));
+    writeFile->close();
+
+    readFile->open();
+    readFile->cursorPosition = 0;
+    tiny_utf8::string testString = readFile->readString(5).value;
+    readFile->close();
+    ASSERT(testString == "Hallo");
+    std::cout << "Passed write string test." << std::endl;
+
+    delete writeFile;
+
+    File *appendFile;
+
+    appendFile = File::open("resources/writeTest", 'a').value;
+    appendFile->writeByte(',');
+    appendFile->close();
+
+    readFile->open();
+    readFile->cursorPosition = 0;
+    tiny_utf8::string appendByteString = readFile->readString(readFile->size.value).value;
+    readFile->close();
+
+    ASSERT(appendByteString == "Hallo,");
+    std::cout << "Passed append byte test." << std::endl;
+
+    appendFile->open();
+    appendFile->write(std::vector<uint8_t>({' ', 'I', 'c', 'h'}));
+    appendFile->close();
+
+    readFile->open();
+    readFile->cursorPosition = 0;
+    tiny_utf8::string appendBytesString = readFile->readString(readFile->size.value).value;
+    readFile->close();
+
+    ASSERT(appendBytesString == "Hallo, Ich");
+    std::cout << "Passed append test" << std::endl;
+
+    appendFile->open();
+    appendFile->writeString(" bin Shwoomple.");
+    appendFile->close();
+
+    readFile->open();
+    readFile->cursorPosition = 0;
+    tiny_utf8::string appendString = readFile->readString(readFile->size.value).value;
+    readFile->close();
+
+    ASSERT(appendString == "Hallo, Ich bin Shwoomple.");
+    std::cout << "Passed append string test" << std::endl;
+
+    delete appendFile;
+
+    //test insert functions
+    File *modifyFile;
+
+    modifyFile = File::open("resources/writeTest", 'm').value;
+
+    modifyFile->cursorPosition = 5;
+    modifyFile->insertByte(',');
+    modifyFile->close();
+
+    readFile->open();
+    readFile->cursorPosition = 0;
+    tiny_utf8::string modifyByteString = readFile->readString(readFile->size.value).value;
+    readFile->close();
+
+    ASSERT(modifyByteString == "Hallo,, Ich bin Shwoomple.");
+    std::cout << "Passed modify byte test" << std::endl;
+
+    modifyFile->open();
+    modifyFile->cursorPosition = 6;
+    modifyFile->insert(std::vector<uint8_t>({' ', 'H', 'i'}));
+    modifyFile->close();
+
+    readFile->open();
+    readFile->cursorPosition = 0;
+    tiny_utf8::string modifyBytesString = readFile->readString(readFile->size.value).value;
+    readFile->close();
+
+    ASSERT(modifyBytesString == "Hallo, Hi, Ich bin Shwoomple.");
+    std::cout << "Passed modify test" << std::endl;
+
+    modifyFile->open();
+    modifyFile->cursorPosition = 9;
+    modifyFile->insertString(" THE CAKE IS A LIE");
+    modifyFile->close();
+
+    readFile->open();
+    readFile->cursorPosition = 0;
+    tiny_utf8::string modifyString = readFile->readString(readFile->size.value).value;
+    readFile->close();
+
+    ASSERT(modifyString == "Hallo, Hi THE CAKE IS A LIE, Ich bin Shwoomple.");
+    std::cout << "Passed modify string test" << std::endl;
+
+    //test cut functions
+    modifyFile->open();
+    modifyFile->cursorPosition = modifyFile->size.value-1;
+    ErrorOr<uint8_t> cutByte = modifyFile->cutByte();
+    modifyFile->close();
+
+    readFile->open();
+    readFile->cursorPosition = 0;
+    tiny_utf8::string cutByteString = readFile->readString(readFile->size.value).value;
+    readFile->close();    
+
+    ASSERT(cutByte.value == '.');
+    ASSERT(cutByteString == "Hallo, Hi THE CAKE IS A LIE, Ich bin Shwoomple");
+    std::cout << "Passed cut byte test." << std::endl;
+}

src/test/javacompat.cpp

@@ -13,12 +13,12 @@
 // version 3 along with this program.
 // If not, see https://www.gnu.org/licenses/agpl-3.0.en.html
 
-#include "assert.h++"
-#include "../lib/javacompat.h++"
 #include <iostream>
 #include <tinyutf8/tinyutf8.h>
 #include <fstream>
 #include <vector>
+#include "assert.hpp"
+#include "../lib/javacompat.hpp"
 
 
 int main(){
@@ -28,7 +28,7 @@ int main(){
     // java-style_unicode: 119 bytes, 85 characters ??
 
     std::cout << "################################################################################" << std::endl;
-    std::cout << "Java String Tests" << std::endl;
+    std::cout << "Javacompat tests" << std::endl;
     std::cout << "################################################################################" << std::endl;
 
     char* nextChar = new char;
@@ -52,7 +52,7 @@ int main(){
         return 2;
     }
 
-    tiny_utf8::string importedString = JavaCompat::importJavaString(reinterpret_cast<uint8_t*>(javaStdString.data()));
+    tiny_utf8::string importedString = JavaCompat::importJavaString(reinterpret_cast<uint8_t*>(javaStdString.data()), 0x75).value;
 
     std::streampos normalSize;
     std::string normalStdString;
@@ -75,9 +75,30 @@ int main(){
 
     tiny_utf8::string normalString = tiny_utf8::string(normalStdString);
 
+    // check for normal operation
     ASSERT(normalString == importedString);
+
+    // check for mismatched size error
+    std::string javaStdStringCopy = javaStdString;
+    javaStdStringCopy[0]='b';
+    ErrorOr<tiny_utf8::string> errorString = JavaCompat::importJavaString(reinterpret_cast<uint8_t*>(javaStdStringCopy.data()), 0x75);
+    ASSERT(errorString.isError);
+    ASSERT(errorString.errorCode == ErrorCodes::MISMATCHEDSIZE);
+
     std::cout << "Passed Import Java string test." << std::endl;
 
+    //using normalString from when we read the file earlier
+    //there's no need to read the same file twice
 
-return 0;
+    std::vector<uint8_t> data = JavaCompat::exportJavaString(normalString).value;
+    std::string exportedString = std::string();
+    for(int i=0; i<(int) data.size(); i++){
+        exportedString.push_back(data[i]);
+    }
+
+    ASSERT(exportedString == javaStdString);
+    std::cout << "Passed Export Java string test." << std::endl;
+    delete nextChar;
+
+    return 0;
 }

src/test/nbt_helpers.cpp

@@ -1,446 +0,0 @@
-// Copyright 2022, FOSS-VG Developers and Contributers
-//
-// This program is free software: you can redistribute it and/or modify it
-// under the terms of the GNU Affero General Public License as published
-// by the Free Software Foundation, version 3.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied
-// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
-// See the GNU Affero General Public License for more details.
-//
-// You should have received a copy of the GNU Affero General Public License
-// version 3 along with this program.
-// If not, see https://www.gnu.org/licenses/agpl-3.0.en.html
-
-#include <iostream>
-#include <cstdint>
-#include <vector>
-
-#include "assert.h++"
-
-#include "../lib/nbt.h++"
-#include "../lib/error.h++"
-
-int main(){
-    std::cout << "################################################################################" << std::endl;
-    std::cout << "NBT helper tests" << std::endl;
-    std::cout << "################################################################################" << std::endl;
-
-    // used for all integer tests
-    uint8_t dataForIntTest[] = {30, 31, 32, 33, 34, 35, 36, 37, 38, 39};
-    uint64_t dataSize = 10;
-
-    // int8 ############################################################
-    // read successfully
-    uint64_t currentPosition = 5;
-    ASSERT(NBT::helper::readInt8(dataForIntTest, dataSize, currentPosition).value == 35);
-    ASSERT(NBT::helper::readInt8(dataForIntTest, dataSize, currentPosition).isError == false);
-    // begin of data
-    currentPosition = 0;
-    ASSERT(NBT::helper::readInt8(dataForIntTest, dataSize, currentPosition).value == 30);
-    ASSERT(NBT::helper::readInt8(dataForIntTest, dataSize, currentPosition).isError == false);
-    // end of data
-    currentPosition = 9;
-    ASSERT(NBT::helper::readInt8(dataForIntTest, dataSize, currentPosition).value == 39);
-    ASSERT(NBT::helper::readInt8(dataForIntTest, dataSize, currentPosition).isError == false);
-    // out of bounds
-    currentPosition = 10;
-    ASSERT(NBT::helper::readInt8(dataForIntTest, dataSize, currentPosition).isError == true);
-    ASSERT(NBT::helper::readInt8(dataForIntTest, dataSize, currentPosition).errorCode == ErrorCodes::OUT_OF_RANGE);
-
-    std::cout << "Passed readInt8 NBT helper test" << std::endl;
-
-    std::vector<uint8_t>* writeInt8TestResult = new std::vector<uint8_t>();
-    NBT::helper::writeInt8(writeInt8TestResult, (int8_t) 8);
-    std::vector<uint8_t> dereferencedWriteInt8TestResult = *writeInt8TestResult;
-    delete writeInt8TestResult;
-    ASSERT(dereferencedWriteInt8TestResult.back() == (uint8_t) 8);
-
-    std::cout << "Passed writeInt8 NBT helper test" << std::endl;
-
-    // int16 ###########################################################
-    // read successfully
-    currentPosition = 5;
-    ASSERT(NBT::helper::readInt16(dataForIntTest, dataSize, currentPosition).value == 8996);
-    ASSERT(NBT::helper::readInt16(dataForIntTest, dataSize, currentPosition).isError == false);
-    // begin of data
-    currentPosition = 0;
-    ASSERT(NBT::helper::readInt16(dataForIntTest, dataSize, currentPosition).value == 7711);
-    ASSERT(NBT::helper::readInt16(dataForIntTest, dataSize, currentPosition).isError == false);
-    // end of data
-    currentPosition = 8;
-    ASSERT(NBT::helper::readInt16(dataForIntTest, dataSize, currentPosition).value == 9767);
-    ASSERT(NBT::helper::readInt16(dataForIntTest, dataSize, currentPosition).isError == false);
-    // partially out of bounds
-    currentPosition = 9;
-    ASSERT(NBT::helper::readInt16(dataForIntTest, dataSize, currentPosition).isError == true);
-    ASSERT(NBT::helper::readInt16(dataForIntTest, dataSize, currentPosition).errorCode == ErrorCodes::OUT_OF_RANGE);
-    // fully out of bounds
-    currentPosition = 10;
-    ASSERT(NBT::helper::readInt16(dataForIntTest, dataSize, currentPosition).isError == true);
-    ASSERT(NBT::helper::readInt16(dataForIntTest, dataSize, currentPosition).errorCode == ErrorCodes::OUT_OF_RANGE);
-
-    std::cout << "Passed readInt16 NBT helper test" << std::endl;
-
-    std::vector<uint8_t>* writeInt16TestResult = new std::vector<uint8_t>();
-    NBT::helper::writeInt16(writeInt16TestResult, (int16_t) 0xABCD);
-    std::vector<uint8_t> dereferencedWriteInt16TestResult = *writeInt16TestResult;
-    delete writeInt16TestResult;
-    ASSERT(dereferencedWriteInt16TestResult[0] == (uint8_t) 0xAB && dereferencedWriteInt16TestResult[1] == (uint8_t) 0xCD);
-
-    std::cout << "Passed writeInt16 NBT helper test" << std::endl;
-
-    // int32 ###########################################################
-    // read successfully
-    currentPosition = 5;
-    ASSERT(NBT::helper::readInt32(dataForIntTest, dataSize, currentPosition).value == 589571366);
-    ASSERT(NBT::helper::readInt32(dataForIntTest, dataSize, currentPosition).isError == false);
-    // begin of data
-    currentPosition = 0;
-    ASSERT(NBT::helper::readInt32(dataForIntTest, dataSize, currentPosition).value == 505356321);
-    ASSERT(NBT::helper::readInt32(dataForIntTest, dataSize, currentPosition).isError == false);
-    // end of data
-    currentPosition = 6;
-    ASSERT(NBT::helper::readInt32(dataForIntTest, dataSize, currentPosition).value == 606414375);
-    ASSERT(NBT::helper::readInt32(dataForIntTest, dataSize, currentPosition).isError == false);
-    // partially out of bounds
-    currentPosition = 7;
-    ASSERT(NBT::helper::readInt32(dataForIntTest, dataSize, currentPosition).isError == true);
-    ASSERT(NBT::helper::readInt32(dataForIntTest, dataSize, currentPosition).errorCode == ErrorCodes::OUT_OF_RANGE);
-    // fully out of bounds
-    currentPosition = 10;
-    ASSERT(NBT::helper::readInt32(dataForIntTest, dataSize, currentPosition).isError == true);
-    ASSERT(NBT::helper::readInt32(dataForIntTest, dataSize, currentPosition).errorCode == ErrorCodes::OUT_OF_RANGE);
-
-    std::cout << "Passed readInt32 NBT helper test" << std::endl;
-
-    std::vector<uint8_t>* writeInt32TestResult = new std::vector<uint8_t>();
-    NBT::helper::writeInt32(writeInt32TestResult, (int32_t) 0x12345678);
-    std::vector<uint8_t> dereferencedWriteInt32TestResult = *writeInt32TestResult;
-    delete writeInt32TestResult;
-    ASSERT(
-        dereferencedWriteInt32TestResult[0] == (uint8_t) 0x12 &&
-        dereferencedWriteInt32TestResult[1] == (uint8_t) 0x34 &&
-        dereferencedWriteInt32TestResult[2] == (uint8_t) 0x56 &&
-        dereferencedWriteInt32TestResult[3] == (uint8_t) 0x78
-    );
-
-    std::cout << "Passed writeInt32 NBT helper test" << std::endl;
-
-    // int64 ###########################################################
-    // read successfully
-    currentPosition = 1;
-    ASSERT(NBT::helper::readInt64(dataForIntTest, dataSize, currentPosition).value == 2242829044932683046);
-    ASSERT(NBT::helper::readInt64(dataForIntTest, dataSize, currentPosition).isError == false);
-    // begin of data
-    currentPosition = 0;
-    ASSERT(NBT::helper::readInt64(dataForIntTest, dataSize, currentPosition).value == 2170488872094606373);
-    ASSERT(NBT::helper::readInt64(dataForIntTest, dataSize, currentPosition).isError == false);
-    // end of data
-    currentPosition = 2;
-    ASSERT(NBT::helper::readInt64(dataForIntTest, dataSize, currentPosition).value == 2315169217770759719);
-    ASSERT(NBT::helper::readInt64(dataForIntTest, dataSize, currentPosition).isError == false);
-    // partially out of bounds
-    currentPosition = 3;
-    ASSERT(NBT::helper::readInt64(dataForIntTest, dataSize, currentPosition).isError == true);
-    ASSERT(NBT::helper::readInt64(dataForIntTest, dataSize, currentPosition).errorCode == ErrorCodes::OUT_OF_RANGE);
-    // fully out of bounds
-    currentPosition = 10;
-    ASSERT(NBT::helper::readInt64(dataForIntTest, dataSize, currentPosition).isError == true);
-    ASSERT(NBT::helper::readInt64(dataForIntTest, dataSize, currentPosition).errorCode == ErrorCodes::OUT_OF_RANGE);
-
-    std::cout << "Passed readInt64 NBT helper test" << std::endl;
-
-    std::vector<uint8_t>* writeInt64TestResult = new std::vector<uint8_t>();
-    NBT::helper::writeInt64(writeInt64TestResult, (int64_t) 0x0123456789ABCDEF);
-    std::vector<uint8_t> dereferencedWriteInt64TestResult = *writeInt64TestResult;
-    delete writeInt64TestResult;
-    ASSERT(
-        dereferencedWriteInt64TestResult[0] == (uint8_t) 0x01 &&
-        dereferencedWriteInt64TestResult[1] == (uint8_t) 0x23 &&
-        dereferencedWriteInt64TestResult[2] == (uint8_t) 0x45 &&
-        dereferencedWriteInt64TestResult[3] == (uint8_t) 0x67 &&
-        dereferencedWriteInt64TestResult[4] == (uint8_t) 0x89 &&
-        dereferencedWriteInt64TestResult[5] == (uint8_t) 0xAB &&
-        dereferencedWriteInt64TestResult[6] == (uint8_t) 0xCD &&
-        dereferencedWriteInt64TestResult[7] == (uint8_t) 0xEF
-    );
-
-    std::cout << "Passed writeInt64 NBT helper test" << std::endl;
-
-    //##################################################################
-
-    // used for integer "array" tests
-    uint8_t dataForIntArrayTest[] = {
-         0,  0,  0, 20,
-         1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20,
-        21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
-         0,  0,  0,  5,
-        41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60,
-         0,  0,  0, 10,
-        61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80,
-        81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99,100,
-         0,  0,  0,  0
-    };
-    dataSize = 116;
-
-    // int8 "array" ####################################################
-    // read successfully
-    currentPosition = 0;
-    ASSERT(NBT::helper::readInt8Array(dataForIntArrayTest, dataSize, currentPosition).value == std::vector<int8_t>({1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20}));
-    ASSERT(NBT::helper::readInt8Array(dataForIntArrayTest, dataSize, currentPosition).isError == false);
-    // read empty
-    currentPosition = 112;
-    ASSERT(NBT::helper::readInt8Array(dataForIntArrayTest, dataSize, currentPosition).value == std::vector<int8_t>());
-    ASSERT(NBT::helper::readInt8Array(dataForIntArrayTest, dataSize, currentPosition).isError == false);
-    // read overrun
-    currentPosition = 20;
-    ASSERT(NBT::helper::readInt8Array(dataForIntArrayTest, dataSize, currentPosition).isError == true);
-    ASSERT(NBT::helper::readInt8Array(dataForIntArrayTest, dataSize, currentPosition).errorCode == ErrorCodes::OVERRUN);
-    // read with size partially out of bounds
-    currentPosition = 114;
-    ASSERT(NBT::helper::readInt8Array(dataForIntArrayTest, dataSize, currentPosition).isError == true);
-    ASSERT(NBT::helper::readInt8Array(dataForIntArrayTest, dataSize, currentPosition).errorCode == ErrorCodes::OUT_OF_RANGE);
-    // read out of bounds
-    currentPosition = 200;
-    ASSERT(NBT::helper::readInt8Array(dataForIntArrayTest, dataSize, currentPosition).isError == true);
-    ASSERT(NBT::helper::readInt8Array(dataForIntArrayTest, dataSize, currentPosition).errorCode == ErrorCodes::OUT_OF_RANGE);
-
-    std::cout << "Passed readInt8Array NBT helper test" << std::endl;
-
-    std::vector<uint8_t>* int8ArrayTestOutput = new std::vector<uint8_t>();
-    int8_t writeDataTest[] = {1,2,3,4};
-    NBT::helper::writeInt8Array(int8ArrayTestOutput, writeDataTest, (uint32_t)4);
-    ASSERT(
-        int8ArrayTestOutput->at(0) == 0 &&
-        int8ArrayTestOutput->at(1) == 0 &&
-        int8ArrayTestOutput->at(2) == 0 &&
-        int8ArrayTestOutput->at(3) == 4 &&
-        int8ArrayTestOutput->at(4) == 1 &&
-        int8ArrayTestOutput->at(5) == 2 &&
-        int8ArrayTestOutput->at(6) == 3 &&
-        int8ArrayTestOutput->at(7) == 4
-    );
-    int8ArrayTestOutput->clear();
-    NBT::helper::writeInt8Array(int8ArrayTestOutput, std::vector<int8_t>({1,2,3,4}));
-    ASSERT(
-        int8ArrayTestOutput->at(0) == 0 &&
-        int8ArrayTestOutput->at(1) == 0 &&
-        int8ArrayTestOutput->at(2) == 0 &&
-        int8ArrayTestOutput->at(3) == 4 &&
-        int8ArrayTestOutput->at(4) == 1 &&
-        int8ArrayTestOutput->at(5) == 2 &&
-        int8ArrayTestOutput->at(6) == 3 &&
-        int8ArrayTestOutput->at(7) == 4
-    );
-    delete int8ArrayTestOutput;
-    std::cout << "Passed writeInt8Array NBT helper test" << std::endl;
-
-    // int32 "array" ###################################################
-    // read successfully
-    currentPosition = 68;
-    ASSERT(NBT::helper::readInt32Array(dataForIntArrayTest, dataSize, currentPosition).value == std::vector<int32_t>({1027489600, 1094861636, 1162233672, 1229605708, 1296977744, 1364349780, 1431721816, 1499093852, 1566465888, 1633837924}));
-    ASSERT(NBT::helper::readInt32Array(dataForIntArrayTest, dataSize, currentPosition).isError == false);
-    // read empty
-    currentPosition = 112;
-    ASSERT(NBT::helper::readInt32Array(dataForIntArrayTest, dataSize, currentPosition).value == std::vector<int32_t>());
-    ASSERT(NBT::helper::readInt32Array(dataForIntArrayTest, dataSize, currentPosition).isError == false);
-    // read overrun
-    currentPosition = 20;
-    ASSERT(NBT::helper::readInt32Array(dataForIntArrayTest, dataSize, currentPosition).isError == true);
-    ASSERT(NBT::helper::readInt32Array(dataForIntArrayTest, dataSize, currentPosition).errorCode == ErrorCodes::OVERRUN);
-    // read with size partially out of bounds
-    currentPosition = 114;
-    ASSERT(NBT::helper::readInt32Array(dataForIntArrayTest, dataSize, currentPosition).isError == true);
-    ASSERT(NBT::helper::readInt32Array(dataForIntArrayTest, dataSize, currentPosition).errorCode == ErrorCodes::OUT_OF_RANGE);
-    // read out of bounds
-    currentPosition = 200;
-    ASSERT(NBT::helper::readInt32Array(dataForIntArrayTest, dataSize, currentPosition).isError == true);
-    ASSERT(NBT::helper::readInt32Array(dataForIntArrayTest, dataSize, currentPosition).errorCode == ErrorCodes::OUT_OF_RANGE);
-
-    std::cout << "Passed readInt32Array NBT helper test" << std::endl;
-
-    std::vector<uint8_t>* int32ArrayTestOutput = new std::vector<uint8_t>();
-    int32_t input32[] = {0x01234567, 0x01234567};
-    NBT::helper::writeInt32Array(int32ArrayTestOutput, input32, 2);
-    ASSERT(
-        int32ArrayTestOutput->at(0) == 0x00 &&
-        int32ArrayTestOutput->at(1) == 0x00 &&
-        int32ArrayTestOutput->at(2) == 0x00 &&
-        int32ArrayTestOutput->at(3) == 0x02 &&
-        int32ArrayTestOutput->at(4) == 0x01 &&
-        int32ArrayTestOutput->at(5) == 0x23 &&
-        int32ArrayTestOutput->at(6) == 0x45 &&
-        int32ArrayTestOutput->at(7) == 0x67 &&
-        int32ArrayTestOutput->at(8) == 0x01 &&
-        int32ArrayTestOutput->at(9) == 0x23 &&
-        int32ArrayTestOutput->at(10) == 0x45 &&
-        int32ArrayTestOutput->at(11) == 0x67
-    );
-    int32ArrayTestOutput->clear();
-    NBT::helper::writeInt32Array(int32ArrayTestOutput, std::vector<int32_t>({0x01234567, 0x01234567}));
-    ASSERT(
-        int32ArrayTestOutput->at(0) == 0x00 &&
-        int32ArrayTestOutput->at(1) == 0x00 &&
-        int32ArrayTestOutput->at(2) == 0x00 &&
-        int32ArrayTestOutput->at(3) == 0x02 &&
-        int32ArrayTestOutput->at(4) == 0x01 &&
-        int32ArrayTestOutput->at(5) == 0x23 &&
-        int32ArrayTestOutput->at(6) == 0x45 &&
-        int32ArrayTestOutput->at(7) == 0x67 &&
-        int32ArrayTestOutput->at(8) == 0x01 &&
-        int32ArrayTestOutput->at(9) == 0x23 &&
-        int32ArrayTestOutput->at(10) == 0x45 &&
-        int32ArrayTestOutput->at(11) == 0x67
-    );
-    delete int32ArrayTestOutput;
-
-    std::cout << "Passed writeInt32Array NBT helper test" << std::endl;
-
-    // int64 "array" ###################################################
-    // read successfully
-    currentPosition = 44;
-    ASSERT(NBT::helper::readInt64Array(dataForIntArrayTest, dataSize, currentPosition).value == std::vector<int64_t>({2966230773313449776, 3544952156018063160, 4123673537695186954, 4413034230074983236, 4991755612779596620}));
-    ASSERT(NBT::helper::readInt64Array(dataForIntArrayTest, dataSize, currentPosition).isError == false);
-    // read empty
-    currentPosition = 112;
-    ASSERT(NBT::helper::readInt64Array(dataForIntArrayTest, dataSize, currentPosition).value == std::vector<int64_t>());
-    ASSERT(NBT::helper::readInt64Array(dataForIntArrayTest, dataSize, currentPosition).isError == false);
-    // read overrun
-    currentPosition = 20;
-    ASSERT(NBT::helper::readInt64Array(dataForIntArrayTest, dataSize, currentPosition).isError == true);
-    ASSERT(NBT::helper::readInt64Array(dataForIntArrayTest, dataSize, currentPosition).errorCode == ErrorCodes::OVERRUN);
-    // read with size partially out of bounds
-    currentPosition = 114;
-    ASSERT(NBT::helper::readInt64Array(dataForIntArrayTest, dataSize, currentPosition).isError == true);
-    ASSERT(NBT::helper::readInt64Array(dataForIntArrayTest, dataSize, currentPosition).errorCode == ErrorCodes::OUT_OF_RANGE);
-    // read out of bounds
-    currentPosition = 200;
-    ASSERT(NBT::helper::readInt64Array(dataForIntArrayTest, dataSize, currentPosition).isError == true);
-    ASSERT(NBT::helper::readInt64Array(dataForIntArrayTest, dataSize, currentPosition).errorCode == ErrorCodes::OUT_OF_RANGE);
-
-    std::cout << "Passed readInt64Array NBT helper test" << std::endl;
-
-    std::vector<uint8_t>* int64ArrayTestOutput = new std::vector<uint8_t>();
-    int64_t input64[] = {0x0123456789ABCDEF, 0x0123456789ABCDEF};
-    NBT::helper::writeInt64Array(int64ArrayTestOutput, input64, 2);
-    ASSERT(
-        int64ArrayTestOutput->at(0) == 0x00 &&
-        int64ArrayTestOutput->at(1) == 0x00 &&
-        int64ArrayTestOutput->at(2) == 0x00 &&
-        int64ArrayTestOutput->at(3) == 0x02 &&
-        int64ArrayTestOutput->at(4) == 0x01 &&
-        int64ArrayTestOutput->at(5) == 0x23 &&
-        int64ArrayTestOutput->at(6) == 0x45 &&
-        int64ArrayTestOutput->at(7) == 0x67 &&
-        int64ArrayTestOutput->at(8) == 0x89 &&
-        int64ArrayTestOutput->at(9) == 0xAB &&
-        int64ArrayTestOutput->at(10) == 0xCD &&
-        int64ArrayTestOutput->at(11) == 0xEF &&
-        int64ArrayTestOutput->at(12) == 0x01 &&
-        int64ArrayTestOutput->at(13) == 0x23 &&
-        int64ArrayTestOutput->at(14) == 0x45 &&
-        int64ArrayTestOutput->at(15) == 0x67 &&
-        int64ArrayTestOutput->at(16) == 0x89 &&
-        int64ArrayTestOutput->at(17) == 0xAB &&
-        int64ArrayTestOutput->at(18) == 0xCD &&
-        int64ArrayTestOutput->at(19) == 0xEF
-    );
-    int64ArrayTestOutput->clear();
-    NBT::helper::writeInt64Array(int64ArrayTestOutput, std::vector<int64_t>({0x0123456789ABCDEF, 0x0123456789ABCDEF}));
-    ASSERT(
-        int64ArrayTestOutput->at(0) == 0x00 &&
-        int64ArrayTestOutput->at(1) == 0x00 &&
-        int64ArrayTestOutput->at(2) == 0x00 &&
-        int64ArrayTestOutput->at(3) == 0x02 &&
-        int64ArrayTestOutput->at(4) == 0x01 &&
-        int64ArrayTestOutput->at(5) == 0x23 &&
-        int64ArrayTestOutput->at(6) == 0x45 &&
-        int64ArrayTestOutput->at(7) == 0x67 &&
-        int64ArrayTestOutput->at(8) == 0x89 &&
-        int64ArrayTestOutput->at(9) == 0xAB &&
-        int64ArrayTestOutput->at(10) == 0xCD &&
-        int64ArrayTestOutput->at(11) == 0xEF &&
-        int64ArrayTestOutput->at(12) == 0x01 &&
-        int64ArrayTestOutput->at(13) == 0x23 &&
-        int64ArrayTestOutput->at(14) == 0x45 &&
-        int64ArrayTestOutput->at(15) == 0x67 &&
-        int64ArrayTestOutput->at(16) == 0x89 &&
-        int64ArrayTestOutput->at(17) == 0xAB &&
-        int64ArrayTestOutput->at(18) == 0xCD &&
-        int64ArrayTestOutput->at(19) == 0xEF &&
-        true
-    );
-    delete int64ArrayTestOutput;
-
-    std::cout << "Passed writeInt32Array NBT helper test" << std::endl;
-
-    // float32 ["float" in the current implementation :( ] #############
-    uint8_t dataForFloat32Test[] = {0xC7, 0x77, 0x77, 0x77};
-    dataSize = 4;
-    currentPosition = 0;
-    // read successfully
-    ASSERT(NBT::helper::readFloat32(dataForFloat32Test, dataSize, currentPosition).value == -63351.46484375f);
-    ASSERT(NBT::helper::readFloat32(dataForFloat32Test, dataSize, currentPosition).isError == false);
-    // read overrun
-    currentPosition = 1;
-    ASSERT(NBT::helper::readFloat32(dataForFloat32Test, dataSize, currentPosition).isError == true);
-    ASSERT(NBT::helper::readFloat32(dataForFloat32Test, dataSize, currentPosition).errorCode == ErrorCodes::OVERRUN);
-    // read out of bounds
-    currentPosition = 4;
-    ASSERT(NBT::helper::readFloat32(dataForFloat32Test, dataSize, currentPosition).isError == true);
-    ASSERT(NBT::helper::readFloat32(dataForFloat32Test, dataSize, currentPosition).errorCode == ErrorCodes::OUT_OF_RANGE);
-
-    std::cout << "Passed readFloat32 NBT helper test" << std::endl;
-
-    std::vector<uint8_t>* writeFloat32TestResult = new std::vector<uint8_t>();
-    NBT::helper::writeFloat32(writeFloat32TestResult, (float) -63351.46484375f);
-    std::vector<uint8_t> dereferencedWriteFloat32TestResult = *writeFloat32TestResult;
-    delete writeFloat32TestResult;
-    ASSERT(
-        dereferencedWriteFloat32TestResult[0] == (uint8_t) 0xC7 &&
-        dereferencedWriteFloat32TestResult[1] == (uint8_t) 0x77 &&
-        dereferencedWriteFloat32TestResult[2] == (uint8_t) 0x77 &&
-        dereferencedWriteFloat32TestResult[3] == (uint8_t) 0x77
-    );
-
-    std::cout << "Passed writeFloat32 NBT helper test" << std::endl;
-
-    // float64 ["double" in the current implementation :( ] ############
-    uint8_t dataForFloat64Test[] = {0xC0, 0x34, 0x04, 0x00, 0x08, 0x00, 0x00, 0x00};
-    dataSize = 8;
-    currentPosition = 0;
-    // read successfully
-    ASSERT(NBT::helper::readFloat64(dataForFloat64Test, dataSize, currentPosition).value == -20.015625476837158203125);
-    ASSERT(NBT::helper::readFloat64(dataForFloat64Test, dataSize, currentPosition).isError == false);
-    // read overrun
-    currentPosition = 1;
-    ASSERT(NBT::helper::readFloat64(dataForFloat64Test, dataSize, currentPosition).isError == true);
-    ASSERT(NBT::helper::readFloat64(dataForFloat64Test, dataSize, currentPosition).errorCode == ErrorCodes::OVERRUN);
-    // read out of bounds
-    currentPosition = 8;
-    ASSERT(NBT::helper::readFloat64(dataForFloat64Test, dataSize, currentPosition).isError == true);
-    ASSERT(NBT::helper::readFloat64(dataForFloat64Test, dataSize, currentPosition).errorCode == ErrorCodes::OUT_OF_RANGE);
-
-    std::cout << "Passed readFloat64 NBT helper test" << std::endl;
-
-    std::vector<uint8_t>* writeFloat64TestResult = new std::vector<uint8_t>();
-    NBT::helper::writeFloat64(writeFloat64TestResult, (double) -20.015625476837158203125);
-    std::vector<uint8_t> dereferencedWriteFloat64TestResult = *writeFloat64TestResult;
-    delete writeFloat64TestResult;
-    ASSERT(
-        dereferencedWriteFloat64TestResult[0] == (uint8_t) 0xC0 &&
-        dereferencedWriteFloat64TestResult[1] == (uint8_t) 0x34 &&
-        dereferencedWriteFloat64TestResult[2] == (uint8_t) 0x04 &&
-        dereferencedWriteFloat64TestResult[3] == (uint8_t) 0x00 &&
-        dereferencedWriteFloat64TestResult[4] == (uint8_t) 0x08 &&
-        dereferencedWriteFloat64TestResult[5] == (uint8_t) 0x00 &&
-        dereferencedWriteFloat64TestResult[6] == (uint8_t) 0x00 &&
-        dereferencedWriteFloat64TestResult[7] == (uint8_t) 0x00
-    );
-
-    std::cout << "Passed writeInt64 NBT helper test" << std::endl;
-
-    return 0;
-}

src/test/nbt_read_write_helpers.cpp

@@ -0,0 +1,584 @@
+// Copyright 2022, FOSS-VG Developers and Contributers
+//
+// This program is free software: you can redistribute it and/or modify it
+// under the terms of the GNU Affero General Public License as published
+// by the Free Software Foundation, version 3.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied
+// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// version 3 along with this program.
+// If not, see https://www.gnu.org/licenses/agpl-3.0.en.html
+
+#include <iostream>
+#include <cstdint>
+#include <vector>
+#include <fstream>
+
+#include "assert.hpp"
+
+#include "../lib/nbt.hpp"
+#include "../lib/error.hpp"
+#include "../lib/javacompat.hpp"
+
+int main(){
+    std::cout << "################################################################################" << std::endl;
+    std::cout << "NBT read/write helper tests" << std::endl;
+    std::cout << "################################################################################" << std::endl;
+
+    uint8_t validNBTDataBlob[] = {0x0a, 0x00, 0x00, 0x08, 0x00, 0x3e, 0x53, 0x70, 0x61, 0x63, 0x65, 0x73, 0x20, 0x61, 0x6e, 0x64, 0x20, 0x73, 0x70, 0x65, 0x63, 0x69, 0x61, 0x6c, 0x20, 0x63, 0x68, 0x61, 0x72, 0x61, 0x63, 0x74, 0x65, 0x72, 0x73, 0x20, 0x61, 0x72, 0x65, 0x20, 0x61, 0x6c, 0x6c, 0x6f, 0x77, 0x65, 0x64, 0x20, 0x69, 0x6e, 0x20, 0x74, 0x61, 0x67, 0x20, 0x6e, 0x61, 0x6d, 0x65, 0x73, 0x2c, 0x20, 0x72, 0x69, 0x67, 0x68, 0x74, 0x3f, 0x00, 0x16, 0x49, 0x64, 0x6b, 0x2e, 0x20, 0x4c, 0x65, 0x74, 0xe2, 0x80, 0x99, 0x73, 0x20, 0x66, 0x69, 0x6e, 0x64, 0x20, 0x6f, 0x75, 0x74, 0x2e, 0x0a, 0x00, 0x08, 0x63, 0x6f, 0x6d, 0x70, 0x6f, 0x75, 0x6e, 0x64, 0x03, 0x00, 0x0b, 0x73, 0x6f, 0x6d, 0x65, 0x5f, 0x6e, 0x75, 0x6d, 0x62, 0x65, 0x72, 0xd3, 0x07, 0x23, 0x41, 0x08, 0x00, 0x09, 0x73, 0x6f, 0x6d, 0x65, 0x5f, 0x74, 0x65, 0x78, 0x74, 0x00, 0x0c, 0x65, 0x61, 0x74, 0x20, 0x61, 0x20, 0x63, 0x6f, 0x6f, 0x6b, 0x69, 0x65, 0x00, 0x06, 0x00, 0x06, 0x64, 0x6f, 0x75, 0x62, 0x6c, 0x65, 0x41, 0x23, 0x07, 0xd3, 0x4e, 0xfd, 0x07, 0xf1, 0x05, 0x00, 0x05, 0x66, 0x6c, 0x6f, 0x61, 0x74, 0x42, 0x0d, 0x12, 0x43, 0x02, 0x00, 0x05, 0x69, 0x6e, 0x74, 0x31, 0x36, 0x07, 0xd0, 0x03, 0x00, 0x05, 0x69, 0x6e, 0x74, 0x33, 0x32, 0x00, 0x9a, 0x21, 0x12, 0x0b, 0x00, 0x0b, 0x69, 0x6e, 0x74, 0x33, 0x32, 0x5f, 0x61, 0x72, 0x72, 0x61, 0x79, 0x00, 0x00, 0x00, 0x04, 0x17, 0xbf, 0xe8, 0x3c, 0x00, 0x00, 0xa8, 0xfb, 0x7f, 0xff, 0xff, 0xff, 0x61, 0x72, 0x72, 0x61, 0x04, 0x00, 0x05, 0x69, 0x6e, 0x74, 0x36, 0x34, 0x00, 0x00, 0x00, 0xbc, 0x97, 0xde, 0x9e, 0x3e, 0x0c, 0x00, 0x0b, 0x69, 0x6e, 0x74, 0x36, 0x34, 0x5f, 0x61, 0x72, 0x72, 0x61, 0x79, 0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0xa8, 0xf9, 0x00, 0x00, 0x00, 0x00, 0x01, 0x67, 0xe7, 0xbd, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0xab, 0xd8, 0x00, 0x00, 0xab, 0xd8, 0x00, 0x0b, 0x12, 0x21, 0x00, 0x79, 0x61, 0x72, 0x01, 0x00, 0x04, 0x69, 0x6e, 0x74, 0x38, 0x64, 0x07, 0x00, 0x0a, 0x69, 0x6e, 0x74, 0x38, 0x5f, 0x61, 0x72, 0x72, 0x61, 0x79, 0x00, 0x00, 0x00, 0x08, 0x71, 0x35, 0x77, 0x62, 0x54, 0x64, 0xf5, 0x32, 0x09, 0x00, 0x09, 0x6c, 0x69, 0x73, 0x74, 0x5f, 0x69, 0x6e, 0x74, 0x38, 0x01, 0x00, 0x00, 0x00, 0x05, 0x41, 0x60, 0x4e, 0x7f, 0xfa, 0x09, 0x00, 0x0c, 0x6c, 0x69, 0x73, 0x74, 0x5f, 0x73, 0x74, 0x72, 0x69, 0x6e, 0x67, 0x73, 0x08, 0x00, 0x00, 0x00, 0x0c, 0x00, 0x06, 0x50, 0x61, 0x63, 0x6d, 0x61, 0x6e, 0x00, 0x03, 0x61, 0x74, 0x65, 0x00, 0x03, 0x61, 0x6c, 0x6c, 0x00, 0x03, 0x74, 0x68, 0x65, 0x00, 0x04, 0x64, 0x6f, 0x74, 0x73, 0x00, 0x02, 0x73, 0x6f, 0x00, 0x03, 0x6e, 0x6f, 0x77, 0x00, 0x06, 0x68, 0x65, 0xe2, 0x80, 0x99, 0x73, 0x00, 0x06, 0x63, 0x6f, 0x6d, 0x69, 0x6e, 0x67, 0x00, 0x03, 0x66, 0x6f, 0x72, 0x00, 0x03, 0x74, 0x68, 0x65, 0x00, 0x06, 0x77, 0x6f, 0x72, 0x64, 0x73, 0x2e, 0x08, 0x00, 0x06, 0x73, 0x74, 0x72, 0x69, 0x6e, 0x67, 0x00, 0x0c, 0x48, 0x65, 0x6c, 0x6c, 0x6f, 0x20, 0x57, 0x6f, 0x72, 0x6c, 0x64, 0x21, 0x00};
+    uint64_t validNBTDataBlobSize = 478;
+    uint64_t currentPositionInBlob;
+
+    // used for all integer tests
+    uint8_t dataForIntTest[] = {30, 31, 32, 33, 34, 35, 36, 37, 38, 39};
+    uint64_t dataSize = 10;
+    uint64_t currentPosition;
+
+    // int8 ############################################################
+    // read successfully
+    currentPosition = 5;
+    ASSERT(NBT::Helper::readInt8(dataForIntTest, dataSize, currentPosition).value == 35);
+    ASSERT(NBT::Helper::readInt8(dataForIntTest, dataSize, currentPosition).isError == false);
+    // begin of data
+    currentPosition = 0;
+    ASSERT(NBT::Helper::readInt8(dataForIntTest, dataSize, currentPosition).value == 30);
+    ASSERT(NBT::Helper::readInt8(dataForIntTest, dataSize, currentPosition).isError == false);
+    // end of data
+    currentPosition = 9;
+    ASSERT(NBT::Helper::readInt8(dataForIntTest, dataSize, currentPosition).value == 39);
+    ASSERT(NBT::Helper::readInt8(dataForIntTest, dataSize, currentPosition).isError == false);
+    // out of bounds
+    currentPosition = 10;
+    ASSERT(NBT::Helper::readInt8(dataForIntTest, dataSize, currentPosition).isError == true);
+    ASSERT(NBT::Helper::readInt8(dataForIntTest, dataSize, currentPosition).errorCode == ErrorCodes::OUT_OF_RANGE);
+    // read from a bigger blob
+    currentPositionInBlob = 0x13A;
+    ASSERT(NBT::Helper::readInt8(validNBTDataBlob, validNBTDataBlobSize, currentPositionInBlob).isError == false);
+    ASSERT(NBT::Helper::readInt8(validNBTDataBlob, validNBTDataBlobSize, currentPositionInBlob).value == 100);
+
+    std::cout << "Passed readInt8 NBT helper test" << std::endl;
+
+    std::vector<uint8_t>* writeInt8TestResult = new std::vector<uint8_t>();
+    NBT::Helper::writeInt8(writeInt8TestResult, (int8_t) 8);
+    std::vector<uint8_t> dereferencedWriteInt8TestResult = *writeInt8TestResult;
+    delete writeInt8TestResult;
+    ASSERT(dereferencedWriteInt8TestResult.back() == (uint8_t) 8);
+
+    std::cout << "Passed writeInt8 NBT helper test" << std::endl;
+
+    // int16 ###########################################################
+    // read successfully
+    currentPosition = 5;
+    ASSERT(NBT::Helper::readInt16(dataForIntTest, dataSize, currentPosition).value == 8996);
+    ASSERT(NBT::Helper::readInt16(dataForIntTest, dataSize, currentPosition).isError == false);
+    // begin of data
+    currentPosition = 0;
+    ASSERT(NBT::Helper::readInt16(dataForIntTest, dataSize, currentPosition).value == 7711);
+    ASSERT(NBT::Helper::readInt16(dataForIntTest, dataSize, currentPosition).isError == false);
+    // end of data
+    currentPosition = 8;
+    ASSERT(NBT::Helper::readInt16(dataForIntTest, dataSize, currentPosition).value == 9767);
+    ASSERT(NBT::Helper::readInt16(dataForIntTest, dataSize, currentPosition).isError == false);
+    // partially out of bounds
+    currentPosition = 9;
+    ASSERT(NBT::Helper::readInt16(dataForIntTest, dataSize, currentPosition).isError == true);
+    ASSERT(NBT::Helper::readInt16(dataForIntTest, dataSize, currentPosition).errorCode == ErrorCodes::OVERRUN);
+    // fully out of bounds
+    currentPosition = 10;
+    ASSERT(NBT::Helper::readInt16(dataForIntTest, dataSize, currentPosition).isError == true);
+    ASSERT(NBT::Helper::readInt16(dataForIntTest, dataSize, currentPosition).errorCode == ErrorCodes::OUT_OF_RANGE);
+    // read from a bigger blob
+    currentPositionInBlob = 0xb9;
+    ASSERT(NBT::Helper::readInt16(validNBTDataBlob, validNBTDataBlobSize, currentPositionInBlob).isError == false);
+    ASSERT(NBT::Helper::readInt16(validNBTDataBlob, validNBTDataBlobSize, currentPositionInBlob).value == 2000);
+
+    std::cout << "Passed readInt16 NBT helper test" << std::endl;
+
+    std::vector<uint8_t>* writeInt16TestResult = new std::vector<uint8_t>();
+    NBT::Helper::writeInt16(writeInt16TestResult, (int16_t) 0xABCD);
+    std::vector<uint8_t> dereferencedWriteInt16TestResult = *writeInt16TestResult;
+    delete writeInt16TestResult;
+    ASSERT(dereferencedWriteInt16TestResult[0] == (uint8_t) 0xAB && dereferencedWriteInt16TestResult[1] == (uint8_t) 0xCD);
+
+    std::cout << "Passed writeInt16 NBT helper test" << std::endl;
+
+    // int32 ###########################################################
+    // read successfully
+    currentPosition = 5;
+    ASSERT(NBT::Helper::readInt32(dataForIntTest, dataSize, currentPosition).value == 589571366);
+    ASSERT(NBT::Helper::readInt32(dataForIntTest, dataSize, currentPosition).isError == false);
+    // begin of data
+    currentPosition = 0;
+    ASSERT(NBT::Helper::readInt32(dataForIntTest, dataSize, currentPosition).value == 505356321);
+    ASSERT(NBT::Helper::readInt32(dataForIntTest, dataSize, currentPosition).isError == false);
+    // end of data
+    currentPosition = 6;
+    ASSERT(NBT::Helper::readInt32(dataForIntTest, dataSize, currentPosition).value == 606414375);
+    ASSERT(NBT::Helper::readInt32(dataForIntTest, dataSize, currentPosition).isError == false);
+    // partially out of bounds
+    currentPosition = 7;
+    ASSERT(NBT::Helper::readInt32(dataForIntTest, dataSize, currentPosition).isError == true);
+    ASSERT(NBT::Helper::readInt32(dataForIntTest, dataSize, currentPosition).errorCode == ErrorCodes::OVERRUN);
+    // fully out of bounds
+    currentPosition = 10;
+    ASSERT(NBT::Helper::readInt32(dataForIntTest, dataSize, currentPosition).isError == true);
+    ASSERT(NBT::Helper::readInt32(dataForIntTest, dataSize, currentPosition).errorCode == ErrorCodes::OUT_OF_RANGE);
+    // read from a bigger blob
+    currentPositionInBlob = 0xc3;
+    ASSERT(NBT::Helper::readInt32(validNBTDataBlob, validNBTDataBlobSize, currentPositionInBlob).isError == false);
+    ASSERT(NBT::Helper::readInt32(validNBTDataBlob, validNBTDataBlobSize, currentPositionInBlob).value == 10101010);
+
+    std::cout << "Passed readInt32 NBT helper test" << std::endl;
+
+    std::vector<uint8_t>* writeInt32TestResult = new std::vector<uint8_t>();
+    NBT::Helper::writeInt32(writeInt32TestResult, (int32_t) 0x12345678);
+    // delete before checking assertions so we don't leak
+    std::vector<uint8_t> dereferencedWriteInt32TestResult = *writeInt32TestResult;
+    delete writeInt32TestResult;
+    ASSERT(
+        dereferencedWriteInt32TestResult[0] == (uint8_t) 0x12 &&
+        dereferencedWriteInt32TestResult[1] == (uint8_t) 0x34 &&
+        dereferencedWriteInt32TestResult[2] == (uint8_t) 0x56 &&
+        dereferencedWriteInt32TestResult[3] == (uint8_t) 0x78
+    );
+
+    std::cout << "Passed writeInt32 NBT helper test" << std::endl;
+
+    // int64 ###########################################################
+    // read successfully
+    currentPosition = 1;
+    ASSERT(NBT::Helper::readInt64(dataForIntTest, dataSize, currentPosition).value == 2242829044932683046);
+    ASSERT(NBT::Helper::readInt64(dataForIntTest, dataSize, currentPosition).isError == false);
+    // begin of data
+    currentPosition = 0;
+    ASSERT(NBT::Helper::readInt64(dataForIntTest, dataSize, currentPosition).value == 2170488872094606373);
+    ASSERT(NBT::Helper::readInt64(dataForIntTest, dataSize, currentPosition).isError == false);
+    // end of data
+    currentPosition = 2;
+    ASSERT(NBT::Helper::readInt64(dataForIntTest, dataSize, currentPosition).value == 2315169217770759719);
+    ASSERT(NBT::Helper::readInt64(dataForIntTest, dataSize, currentPosition).isError == false);
+    // partially out of bounds
+    currentPosition = 3;
+    ASSERT(NBT::Helper::readInt64(dataForIntTest, dataSize, currentPosition).isError == true);
+    ASSERT(NBT::Helper::readInt64(dataForIntTest, dataSize, currentPosition).errorCode == ErrorCodes::OVERRUN);
+    // fully out of bounds
+    currentPosition = 10;
+    ASSERT(NBT::Helper::readInt64(dataForIntTest, dataSize, currentPosition).isError == true);
+    ASSERT(NBT::Helper::readInt64(dataForIntTest, dataSize, currentPosition).errorCode == ErrorCodes::OUT_OF_RANGE);
+    // read from a bigger blob
+    currentPositionInBlob = 0xf1;
+    ASSERT(NBT::Helper::readInt64(validNBTDataBlob, validNBTDataBlobSize, currentPositionInBlob).isError == false);
+    ASSERT(NBT::Helper::readInt64(validNBTDataBlob, validNBTDataBlobSize, currentPositionInBlob).value == 810001800766);
+
+    std::cout << "Passed readInt64 NBT helper test" << std::endl;
+
+    std::vector<uint8_t>* writeInt64TestResult = new std::vector<uint8_t>();
+    NBT::Helper::writeInt64(writeInt64TestResult, (int64_t) 0x0123456789ABCDEF);
+    // delete before checking assertions so we don't leak
+    std::vector<uint8_t> dereferencedWriteInt64TestResult = *writeInt64TestResult;
+    delete writeInt64TestResult;
+    ASSERT(
+        dereferencedWriteInt64TestResult[0] == (uint8_t) 0x01 &&
+        dereferencedWriteInt64TestResult[1] == (uint8_t) 0x23 &&
+        dereferencedWriteInt64TestResult[2] == (uint8_t) 0x45 &&
+        dereferencedWriteInt64TestResult[3] == (uint8_t) 0x67 &&
+        dereferencedWriteInt64TestResult[4] == (uint8_t) 0x89 &&
+        dereferencedWriteInt64TestResult[5] == (uint8_t) 0xAB &&
+        dereferencedWriteInt64TestResult[6] == (uint8_t) 0xCD &&
+        dereferencedWriteInt64TestResult[7] == (uint8_t) 0xEF
+    );
+
+    std::cout << "Passed writeInt64 NBT helper test" << std::endl;
+
+    //##################################################################
+
+    // used for integer "array" tests
+    uint8_t dataForIntArrayTest[] = {
+         0,  0,  0, 20,
+         1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20,
+        21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
+         0,  0,  0,  5,
+        41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60,
+         0,  0,  0, 10,
+        61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80,
+        81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99,100,
+         0,  0,  0,  0
+    };
+    dataSize = 116;
+
+    // int8 "array" ####################################################
+    // read successfully
+    currentPosition = 0;
+    ASSERT(NBT::Helper::readInt8Array(dataForIntArrayTest, dataSize, currentPosition).value == std::vector<int8_t>({1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20}));
+    ASSERT(NBT::Helper::readInt8Array(dataForIntArrayTest, dataSize, currentPosition).isError == false);
+    // read empty
+    currentPosition = 112;
+    ASSERT(NBT::Helper::readInt8Array(dataForIntArrayTest, dataSize, currentPosition).value == std::vector<int8_t>());
+    ASSERT(NBT::Helper::readInt8Array(dataForIntArrayTest, dataSize, currentPosition).isError == false);
+    // read overrun
+    currentPosition = 20;
+    ASSERT(NBT::Helper::readInt8Array(dataForIntArrayTest, dataSize, currentPosition).isError == true);
+    ASSERT(NBT::Helper::readInt8Array(dataForIntArrayTest, dataSize, currentPosition).errorCode == ErrorCodes::OVERRUN);
+    // read with size partially out of bounds
+    currentPosition = 114;
+    ASSERT(NBT::Helper::readInt8Array(dataForIntArrayTest, dataSize, currentPosition).isError == true);
+    ASSERT(NBT::Helper::readInt8Array(dataForIntArrayTest, dataSize, currentPosition).errorCode == ErrorCodes::OVERRUN);
+    // read out of bounds
+    currentPosition = 200;
+    ASSERT(NBT::Helper::readInt8Array(dataForIntArrayTest, dataSize, currentPosition).isError == true);
+    ASSERT(NBT::Helper::readInt8Array(dataForIntArrayTest, dataSize, currentPosition).errorCode == ErrorCodes::OUT_OF_RANGE);
+    // read from a bigger blob
+    currentPositionInBlob = 0x148;
+    ASSERT(NBT::Helper::readInt8Array(validNBTDataBlob, validNBTDataBlobSize, currentPositionInBlob).isError == false);
+    ASSERT(NBT::Helper::readInt8Array(validNBTDataBlob, validNBTDataBlobSize, currentPositionInBlob).value == std::vector<int8_t>({(int8_t) 0x71, (int8_t) 0x35, (int8_t) 0x77, (int8_t) 0x62, (int8_t) 0x54, (int8_t) 0x64, (int8_t) 0xf5, (int8_t) 0x32}));
+
+    std::cout << "Passed readInt8Array NBT helper test" << std::endl;
+
+    std::vector<uint8_t>* int8ArrayTestOutput = new std::vector<uint8_t>();
+    int8_t writeDataTest[] = {1,2,3,4};
+    NBT::Helper::writeInt8Array(int8ArrayTestOutput, writeDataTest, (uint32_t)4);
+    ASSERT(
+        int8ArrayTestOutput->at(0) == 0 &&
+        int8ArrayTestOutput->at(1) == 0 &&
+        int8ArrayTestOutput->at(2) == 0 &&
+        int8ArrayTestOutput->at(3) == 4 &&
+        int8ArrayTestOutput->at(4) == 1 &&
+        int8ArrayTestOutput->at(5) == 2 &&
+        int8ArrayTestOutput->at(6) == 3 &&
+        int8ArrayTestOutput->at(7) == 4
+    );
+    int8ArrayTestOutput->clear();
+    NBT::Helper::writeInt8Array(int8ArrayTestOutput, std::vector<int8_t>({1,2,3,4}));
+    ASSERT(
+        int8ArrayTestOutput->at(0) == 0 &&
+        int8ArrayTestOutput->at(1) == 0 &&
+        int8ArrayTestOutput->at(2) == 0 &&
+        int8ArrayTestOutput->at(3) == 4 &&
+        int8ArrayTestOutput->at(4) == 1 &&
+        int8ArrayTestOutput->at(5) == 2 &&
+        int8ArrayTestOutput->at(6) == 3 &&
+        int8ArrayTestOutput->at(7) == 4
+    );
+    delete int8ArrayTestOutput;
+    std::cout << "Passed writeInt8Array NBT helper test" << std::endl;
+
+    // int32 "array" ###################################################
+    // read successfully
+    currentPosition = 68;
+    ASSERT(NBT::Helper::readInt32Array(dataForIntArrayTest, dataSize, currentPosition).value == std::vector<int32_t>({1027489600, 1094861636, 1162233672, 1229605708, 1296977744, 1364349780, 1431721816, 1499093852, 1566465888, 1633837924}));
+    ASSERT(NBT::Helper::readInt32Array(dataForIntArrayTest, dataSize, currentPosition).isError == false);
+    // read empty
+    currentPosition = 112;
+    ASSERT(NBT::Helper::readInt32Array(dataForIntArrayTest, dataSize, currentPosition).value == std::vector<int32_t>());
+    ASSERT(NBT::Helper::readInt32Array(dataForIntArrayTest, dataSize, currentPosition).isError == false);
+    // read overrun
+    currentPosition = 20;
+    ASSERT(NBT::Helper::readInt32Array(dataForIntArrayTest, dataSize, currentPosition).isError == true);
+    ASSERT(NBT::Helper::readInt32Array(dataForIntArrayTest, dataSize, currentPosition).errorCode == ErrorCodes::OVERRUN);
+    // read with size partially out of bounds
+    currentPosition = 114;
+    ASSERT(NBT::Helper::readInt32Array(dataForIntArrayTest, dataSize, currentPosition).isError == true);
+    ASSERT(NBT::Helper::readInt32Array(dataForIntArrayTest, dataSize, currentPosition).errorCode == ErrorCodes::OVERRUN);
+    // read out of bounds
+    currentPosition = 200;
+    ASSERT(NBT::Helper::readInt32Array(dataForIntArrayTest, dataSize, currentPosition).isError == true);
+    ASSERT(NBT::Helper::readInt32Array(dataForIntArrayTest, dataSize, currentPosition).errorCode == ErrorCodes::OUT_OF_RANGE);
+    // read from a bigger blob
+    currentPositionInBlob = 0xd5;
+    ASSERT(NBT::Helper::readInt32Array(validNBTDataBlob, validNBTDataBlobSize, currentPositionInBlob).isError == false);
+    ASSERT(NBT::Helper::readInt32Array(validNBTDataBlob, validNBTDataBlobSize, currentPositionInBlob).value == std::vector<int32_t>({(int32_t) 0x17bfe83c, (int32_t) 0xa8fb, (int32_t) 0x7fffffff, (int32_t) 0x61727261}));
+
+    std::cout << "Passed readInt32Array NBT helper test" << std::endl;
+
+    std::vector<uint8_t>* int32ArrayTestOutput = new std::vector<uint8_t>();
+    int32_t input32[] = {0x01234567, 0x01234567};
+    NBT::Helper::writeInt32Array(int32ArrayTestOutput, input32, 2);
+    ASSERT(
+        int32ArrayTestOutput->at(0) == 0x00 &&
+        int32ArrayTestOutput->at(1) == 0x00 &&
+        int32ArrayTestOutput->at(2) == 0x00 &&
+        int32ArrayTestOutput->at(3) == 0x02 &&
+        int32ArrayTestOutput->at(4) == 0x01 &&
+        int32ArrayTestOutput->at(5) == 0x23 &&
+        int32ArrayTestOutput->at(6) == 0x45 &&
+        int32ArrayTestOutput->at(7) == 0x67 &&
+        int32ArrayTestOutput->at(8) == 0x01 &&
+        int32ArrayTestOutput->at(9) == 0x23 &&
+        int32ArrayTestOutput->at(10) == 0x45 &&
+        int32ArrayTestOutput->at(11) == 0x67
+    );
+    int32ArrayTestOutput->clear();
+    NBT::Helper::writeInt32Array(int32ArrayTestOutput, std::vector<int32_t>({0x01234567, 0x01234567}));
+    ASSERT(
+        int32ArrayTestOutput->at(0) == 0x00 &&
+        int32ArrayTestOutput->at(1) == 0x00 &&
+        int32ArrayTestOutput->at(2) == 0x00 &&
+        int32ArrayTestOutput->at(3) == 0x02 &&
+        int32ArrayTestOutput->at(4) == 0x01 &&
+        int32ArrayTestOutput->at(5) == 0x23 &&
+        int32ArrayTestOutput->at(6) == 0x45 &&
+        int32ArrayTestOutput->at(7) == 0x67 &&
+        int32ArrayTestOutput->at(8) == 0x01 &&
+        int32ArrayTestOutput->at(9) == 0x23 &&
+        int32ArrayTestOutput->at(10) == 0x45 &&
+        int32ArrayTestOutput->at(11) == 0x67
+    );
+    delete int32ArrayTestOutput;
+
+    std::cout << "Passed writeInt32Array NBT helper test" << std::endl;
+
+    // int64 "array" ###################################################
+    // read successfully
+    currentPosition = 44;
+    ASSERT(NBT::Helper::readInt64Array(dataForIntArrayTest, dataSize, currentPosition).value == std::vector<int64_t>({2966230773313449776, 3544952156018063160, 4123673537695186954, 4413034230074983236, 4991755612779596620}));
+    ASSERT(NBT::Helper::readInt64Array(dataForIntArrayTest, dataSize, currentPosition).isError == false);
+    // read empty
+    currentPosition = 112;
+    ASSERT(NBT::Helper::readInt64Array(dataForIntArrayTest, dataSize, currentPosition).value == std::vector<int64_t>());
+    ASSERT(NBT::Helper::readInt64Array(dataForIntArrayTest, dataSize, currentPosition).isError == false);
+    // read overrun
+    currentPosition = 20;
+    ASSERT(NBT::Helper::readInt64Array(dataForIntArrayTest, dataSize, currentPosition).isError == true);
+    ASSERT(NBT::Helper::readInt64Array(dataForIntArrayTest, dataSize, currentPosition).errorCode == ErrorCodes::OVERRUN);
+    // read with size partially out of bounds
+    currentPosition = 114;
+    ASSERT(NBT::Helper::readInt64Array(dataForIntArrayTest, dataSize, currentPosition).isError == true);
+    ASSERT(NBT::Helper::readInt64Array(dataForIntArrayTest, dataSize, currentPosition).errorCode == ErrorCodes::OVERRUN);
+    // read out of bounds
+    currentPosition = 200;
+    ASSERT(NBT::Helper::readInt64Array(dataForIntArrayTest, dataSize, currentPosition).isError == true);
+    ASSERT(NBT::Helper::readInt64Array(dataForIntArrayTest, dataSize, currentPosition).errorCode == ErrorCodes::OUT_OF_RANGE);
+    // read from a bigger blob
+    currentPositionInBlob = 0x107;
+    ASSERT(NBT::Helper::readInt64Array(validNBTDataBlob, validNBTDataBlobSize, currentPositionInBlob).isError == false);
+    ASSERT(NBT::Helper::readInt64Array(validNBTDataBlob, validNBTDataBlobSize, currentPositionInBlob).value == std::vector<int64_t>({(int64_t) 239865, (int64_t) 23586749, (int64_t) 9223372036854775807, (int64_t) 188944201329624, (int64_t) 3116157694992754}));
+
+    std::cout << "Passed readInt64Array NBT helper test" << std::endl;
+
+    std::vector<uint8_t>* int64ArrayTestOutput = new std::vector<uint8_t>();
+    int64_t input64[] = {0x0123456789ABCDEF, 0x0123456789ABCDEF};
+    NBT::Helper::writeInt64Array(int64ArrayTestOutput, input64, 2);
+    ASSERT(
+        int64ArrayTestOutput->at(0) == 0x00 &&
+        int64ArrayTestOutput->at(1) == 0x00 &&
+        int64ArrayTestOutput->at(2) == 0x00 &&
+        int64ArrayTestOutput->at(3) == 0x02 &&
+        int64ArrayTestOutput->at(4) == 0x01 &&
+        int64ArrayTestOutput->at(5) == 0x23 &&
+        int64ArrayTestOutput->at(6) == 0x45 &&
+        int64ArrayTestOutput->at(7) == 0x67 &&
+        int64ArrayTestOutput->at(8) == 0x89 &&
+        int64ArrayTestOutput->at(9) == 0xAB &&
+        int64ArrayTestOutput->at(10) == 0xCD &&
+        int64ArrayTestOutput->at(11) == 0xEF &&
+        int64ArrayTestOutput->at(12) == 0x01 &&
+        int64ArrayTestOutput->at(13) == 0x23 &&
+        int64ArrayTestOutput->at(14) == 0x45 &&
+        int64ArrayTestOutput->at(15) == 0x67 &&
+        int64ArrayTestOutput->at(16) == 0x89 &&
+        int64ArrayTestOutput->at(17) == 0xAB &&
+        int64ArrayTestOutput->at(18) == 0xCD &&
+        int64ArrayTestOutput->at(19) == 0xEF
+    );
+    int64ArrayTestOutput->clear();
+    NBT::Helper::writeInt64Array(int64ArrayTestOutput, std::vector<int64_t>({0x0123456789ABCDEF, 0x0123456789ABCDEF}));
+    ASSERT(
+        int64ArrayTestOutput->at(0) == 0x00 &&
+        int64ArrayTestOutput->at(1) == 0x00 &&
+        int64ArrayTestOutput->at(2) == 0x00 &&
+        int64ArrayTestOutput->at(3) == 0x02 &&
+        int64ArrayTestOutput->at(4) == 0x01 &&
+        int64ArrayTestOutput->at(5) == 0x23 &&
+        int64ArrayTestOutput->at(6) == 0x45 &&
+        int64ArrayTestOutput->at(7) == 0x67 &&
+        int64ArrayTestOutput->at(8) == 0x89 &&
+        int64ArrayTestOutput->at(9) == 0xAB &&
+        int64ArrayTestOutput->at(10) == 0xCD &&
+        int64ArrayTestOutput->at(11) == 0xEF &&
+        int64ArrayTestOutput->at(12) == 0x01 &&
+        int64ArrayTestOutput->at(13) == 0x23 &&
+        int64ArrayTestOutput->at(14) == 0x45 &&
+        int64ArrayTestOutput->at(15) == 0x67 &&
+        int64ArrayTestOutput->at(16) == 0x89 &&
+        int64ArrayTestOutput->at(17) == 0xAB &&
+        int64ArrayTestOutput->at(18) == 0xCD &&
+        int64ArrayTestOutput->at(19) == 0xEF &&
+        true
+    );
+    delete int64ArrayTestOutput;
+
+    std::cout << "Passed writeInt64Array NBT helper test" << std::endl;
+
+    // float ###########################################################
+    uint8_t dataForFloatTest[] = {0xC7, 0x77, 0x77, 0x77};
+    dataSize = 4;
+    currentPosition = 0;
+    // read successfully
+    ASSERT(NBT::Helper::readFloat(dataForFloatTest, dataSize, currentPosition).value == -63351.46484375f);
+    ASSERT(NBT::Helper::readFloat(dataForFloatTest, dataSize, currentPosition).isError == false);
+    // read overrun
+    currentPosition = 1;
+    ASSERT(NBT::Helper::readFloat(dataForFloatTest, dataSize, currentPosition).isError == true);
+    ASSERT(NBT::Helper::readFloat(dataForFloatTest, dataSize, currentPosition).errorCode == ErrorCodes::OVERRUN);
+    // read out of bounds
+    currentPosition = 4;
+    ASSERT(NBT::Helper::readFloat(dataForFloatTest, dataSize, currentPosition).isError == true);
+    ASSERT(NBT::Helper::readFloat(dataForFloatTest, dataSize, currentPosition).errorCode == ErrorCodes::OUT_OF_RANGE);
+    // read from a bigger blob
+    currentPositionInBlob = 0xad;
+    ASSERT(NBT::Helper::readFloat(validNBTDataBlob, validNBTDataBlobSize, currentPositionInBlob).isError == false);
+    ASSERT(NBT::Helper::readFloat(validNBTDataBlob, validNBTDataBlobSize, currentPositionInBlob).value == 35.2678337097168);
+
+    std::cout << "Passed readFloat NBT helper test" << std::endl;
+
+    std::vector<uint8_t>* writeFloatTestResult = new std::vector<uint8_t>();
+    NBT::Helper::writeFloat(writeFloatTestResult, (float) -63351.46484375f);
+    std::vector<uint8_t> dereferencedWriteFloatTestResult = *writeFloatTestResult;
+    delete writeFloatTestResult;
+    ASSERT(
+        dereferencedWriteFloatTestResult[0] == (uint8_t) 0xC7 &&
+        dereferencedWriteFloatTestResult[1] == (uint8_t) 0x77 &&
+        dereferencedWriteFloatTestResult[2] == (uint8_t) 0x77 &&
+        dereferencedWriteFloatTestResult[3] == (uint8_t) 0x77
+    );
+
+    std::cout << "Passed writeFloat NBT helper test" << std::endl;
+
+    // double ##########################################################
+    uint8_t dataForDoubleTest[] = {0xC0, 0x34, 0x04, 0x00, 0x08, 0x00, 0x00, 0x00};
+    dataSize = 8;
+    currentPosition = 0;
+    // read successfully
+    ASSERT(NBT::Helper::readDouble(dataForDoubleTest, dataSize, currentPosition).value == -20.015625476837158203125);
+    ASSERT(NBT::Helper::readDouble(dataForDoubleTest, dataSize, currentPosition).isError == false);
+    // read overrun
+    currentPosition = 1;
+    ASSERT(NBT::Helper::readDouble(dataForDoubleTest, dataSize, currentPosition).isError == true);
+    ASSERT(NBT::Helper::readDouble(dataForDoubleTest, dataSize, currentPosition).errorCode == ErrorCodes::OVERRUN);
+    // read out of bounds
+    currentPosition = 8;
+    ASSERT(NBT::Helper::readDouble(dataForDoubleTest, dataSize, currentPosition).isError == true);
+    ASSERT(NBT::Helper::readDouble(dataForDoubleTest, dataSize, currentPosition).errorCode == ErrorCodes::OUT_OF_RANGE);
+    // read from a bigger blob
+    currentPositionInBlob = 0x9d;
+    ASSERT(NBT::Helper::readDouble(validNBTDataBlob, validNBTDataBlobSize, currentPositionInBlob).isError == false);
+    ASSERT(NBT::Helper::readDouble(validNBTDataBlob, validNBTDataBlobSize, currentPositionInBlob).value == 623593.6542742235);
+
+    std::cout << "Passed readDouble NBT helper test" << std::endl;
+
+    std::vector<uint8_t>* writeDoubleTestResult = new std::vector<uint8_t>();
+    NBT::Helper::writeDouble(writeDoubleTestResult, (double) -20.015625476837158203125);
+    std::vector<uint8_t> dereferencedWriteDoubleTestResult = *writeDoubleTestResult;
+    delete writeDoubleTestResult;
+    ASSERT(
+        dereferencedWriteDoubleTestResult[0] == (uint8_t) 0xC0 &&
+        dereferencedWriteDoubleTestResult[1] == (uint8_t) 0x34 &&
+        dereferencedWriteDoubleTestResult[2] == (uint8_t) 0x04 &&
+        dereferencedWriteDoubleTestResult[3] == (uint8_t) 0x00 &&
+        dereferencedWriteDoubleTestResult[4] == (uint8_t) 0x08 &&
+        dereferencedWriteDoubleTestResult[5] == (uint8_t) 0x00 &&
+        dereferencedWriteDoubleTestResult[6] == (uint8_t) 0x00 &&
+        dereferencedWriteDoubleTestResult[7] == (uint8_t) 0x00
+    );
+
+    std::cout << "Passed writeDouble NBT helper test" << std::endl;
+
+    //readString test
+    char* nextChar = new char;
+
+    //reading data from the java modified utf8 file
+    std::streampos javaSize;
+    std::string javaStdString;
+    const char* javaFilePath = "./resources/unicode_data/java-style_unicode";
+    std::ifstream javaFile(javaFilePath, std::ios::in | std::ios::binary | std::ios::ate);
+    if(javaFile.is_open()){
+        javaSize = javaFile.tellg();
+        javaFile.seekg(0, std::ios::beg);
+
+        for (int i=0; i<javaSize; i++) {
+            javaFile.read(nextChar, 1);
+            javaStdString.push_back(*nextChar);
+        }
+
+        javaFile.close();
+    } else {
+        std::cerr << "Failed to open file: " << javaFilePath << std::endl;
+        return 2;
+    }
+
+
+    //reading data from the normal utf8 file
+    std::streampos normalSize;
+    std::string normalStdString;
+    const char* normalFilePath = "./resources/unicode_data/normal_utf-8";
+    std::ifstream normalFile(normalFilePath, std::ios::in | std::ios::binary | std::ios::ate);
+    if(normalFile.is_open()){
+        normalSize = normalFile.tellg();
+        normalFile.seekg(0, std::ios::beg);
+
+        for (int i=0; i<normalSize; i++) {
+            normalFile.read(nextChar, 1);
+            normalStdString.push_back(*nextChar);
+        }
+
+        normalFile.close();
+    } else {
+        std::cerr << "Failed to open file: " << normalFilePath << std::endl;
+        return 2;
+    }
+    tiny_utf8::string normalString = tiny_utf8::string(normalStdString);
+    delete nextChar;
+
+    ASSERT(normalString == NBT::Helper::readString(reinterpret_cast<uint8_t*>(javaStdString.data()), javaStdString.size(), 0).value)
+
+    javaStdString[0] = '1';
+    ASSERT(NBT::Helper::readString(reinterpret_cast<uint8_t*>(javaStdString.data()), javaStdString.size(), 0).errorCode == ErrorCodes::OVERRUN);
+    ASSERT(NBT::Helper::readString(reinterpret_cast<uint8_t*>(javaStdString.data()), javaStdString.size(), javaStdString.size()).errorCode == ErrorCodes::OUT_OF_RANGE);
+
+    //reading data from the blob at the top of this file
+    currentPositionInBlob = 0x1cf;
+    ASSERT(NBT::Helper::readString(validNBTDataBlob, validNBTDataBlobSize, currentPositionInBlob).isError == false);
+    ASSERT(NBT::Helper::readString(validNBTDataBlob, validNBTDataBlobSize, currentPositionInBlob).value == "Hello World!");
+
+    std::cout << "Passed readString NBT helper test." << std::endl;
+
+    char* nextChar1 = new char;
+
+    //reading data from the java modified utf8 file
+    std::streampos javaSize1;
+    std::vector<uint8_t> javaStdString1;
+    const char* javaFilePath1 = "./resources/unicode_data/java-style_unicode";
+    std::ifstream javaFile1(javaFilePath1, std::ios::in | std::ios::binary | std::ios::ate);
+    if(javaFile1.is_open()){
+        javaSize1 = javaFile1.tellg();
+        javaFile1.seekg(0, std::ios::beg);
+
+        for (int i=0; i<javaSize1; i++) {
+            javaFile1.read(nextChar1, 1);
+            javaStdString1.push_back(*nextChar1);
+        }
+
+        javaFile1.close();
+    } else {
+        std::cerr << "Failed to open file: " << javaFilePath1 << std::endl;
+        return 2;
+    }
+    delete nextChar1;
+
+    std::vector<uint8_t>* exportedString = new std::vector<uint8_t>();
+    NBT::Helper::writeString(exportedString, normalString);
+    ASSERT(javaStdString1 == *exportedString);
+
+    //check that we get an error when trying to write a string that is too long
+    std::string overrunString = std::string(0x10000, '.');
+    ASSERT(NBT::Helper::writeString(exportedString, tiny_utf8::string(overrunString)).isError);
+    ASSERT(NBT::Helper::writeString(exportedString, tiny_utf8::string(overrunString)).errorCode == ErrorCodes::OVERRUN);
+
+    std::cout << "Passed writeString NBT helper test." << std::endl;
+
+    return 0;
+}

src/test/nbt_size_helpers.cpp

@@ -0,0 +1,257 @@
+// Copyright 2022, FOSS-VG Developers and Contributers
+//
+// This program is free software: you can redistribute it and/or modify it
+// under the terms of the GNU Affero General Public License as published
+// by the Free Software Foundation, version 3.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied
+// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// version 3 along with this program.
+// If not, see https://www.gnu.org/licenses/agpl-3.0.en.html
+
+#include <iostream>
+#include <cstdint>
+
+#include "assert.hpp"
+
+#include "../lib/nbt.hpp"
+#include "../lib/error.hpp"
+
+int main() {
+    std::cout
+        << "################################################################################\n"
+        << "NBT size helper tests\n"
+        << "################################################################################"
+        << std::endl;
+
+    // a full copy of /resources/NBT_data/simple_nbt
+    //
+    // This contains all tag types. It is most likely not suitable for
+    // tests chasing edge cases as it is - as the name says - really
+    // basic NBT data.
+    uint8_t simpleNBTData[] = {
+        0x0a, 0x00, 0x00, 0x08, 0x00, 0x3e, 0x53, 0x70,
+        0x61, 0x63, 0x65, 0x73, 0x20, 0x61, 0x6e, 0x64,
+        0x20, 0x73, 0x70, 0x65, 0x63, 0x69, 0x61, 0x6c,
+        0x20, 0x63, 0x68, 0x61, 0x72, 0x61, 0x63, 0x74,
+        0x65, 0x72, 0x73, 0x20, 0x61, 0x72, 0x65, 0x20,
+        0x61, 0x6c, 0x6c, 0x6f, 0x77, 0x65, 0x64, 0x20,
+        0x69, 0x6e, 0x20, 0x74, 0x61, 0x67, 0x20, 0x6e,
+        0x61, 0x6d, 0x65, 0x73, 0x2c, 0x20, 0x72, 0x69,
+        0x67, 0x68, 0x74, 0x3f, 0x00, 0x16, 0x49, 0x64,
+        0x6b, 0x2e, 0x20, 0x4c, 0x65, 0x74, 0xe2, 0x80,
+        0x99, 0x73, 0x20, 0x66, 0x69, 0x6e, 0x64, 0x20,
+        0x6f, 0x75, 0x74, 0x2e, 0x0a, 0x00, 0x08, 0x63,
+        0x6f, 0x6d, 0x70, 0x6f, 0x75, 0x6e, 0x64, 0x03,
+        0x00, 0x0b, 0x73, 0x6f, 0x6d, 0x65, 0x5f, 0x6e,
+        0x75, 0x6d, 0x62, 0x65, 0x72, 0xd3, 0x07, 0x23,
+        0x41, 0x08, 0x00, 0x09, 0x73, 0x6f, 0x6d, 0x65,
+        0x5f, 0x74, 0x65, 0x78, 0x74, 0x00, 0x0c, 0x65,
+        0x61, 0x74, 0x20, 0x61, 0x20, 0x63, 0x6f, 0x6f,
+        0x6b, 0x69, 0x65, 0x00, 0x06, 0x00, 0x06, 0x64,
+        0x6f, 0x75, 0x62, 0x6c, 0x65, 0x41, 0x23, 0x07,
+        0xd3, 0x4e, 0xfd, 0x07, 0xf1, 0x05, 0x00, 0x05,
+        0x66, 0x6c, 0x6f, 0x61, 0x74, 0x42, 0x0d, 0x12,
+        0x43, 0x02, 0x00, 0x05, 0x69, 0x6e, 0x74, 0x31,
+        0x36, 0x07, 0xd0, 0x03, 0x00, 0x05, 0x69, 0x6e,
+        0x74, 0x33, 0x32, 0x00, 0x9a, 0x21, 0x12, 0x0b,
+        0x00, 0x0b, 0x69, 0x6e, 0x74, 0x33, 0x32, 0x5f,
+        0x61, 0x72, 0x72, 0x61, 0x79, 0x00, 0x00, 0x00,
+        0x04, 0x17, 0xbf, 0xe8, 0x3c, 0x00, 0x00, 0xa8,
+        0xfb, 0x7f, 0xff, 0xff, 0xff, 0x61, 0x72, 0x72,
+        0x61, 0x04, 0x00, 0x05, 0x69, 0x6e, 0x74, 0x36,
+        0x34, 0x00, 0x00, 0x00, 0xbc, 0x97, 0xde, 0x9e,
+        0x3e, 0x0c, 0x00, 0x0b, 0x69, 0x6e, 0x74, 0x36,
+        0x34, 0x5f, 0x61, 0x72, 0x72, 0x61, 0x79, 0x00,
+        0x00, 0x00, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x03, 0xa8, 0xf9, 0x00, 0x00, 0x00, 0x00, 0x01,
+        0x67, 0xe7, 0xbd, 0x7f, 0xff, 0xff, 0xff, 0xff,
+        0xff, 0xff, 0xff, 0x00, 0x00, 0xab, 0xd8, 0x00,
+        0x00, 0xab, 0xd8, 0x00, 0x0b, 0x12, 0x21, 0x00,
+        0x79, 0x61, 0x72, 0x01, 0x00, 0x04, 0x69, 0x6e,
+        0x74, 0x38, 0x64, 0x07, 0x00, 0x0a, 0x69, 0x6e,
+        0x74, 0x38, 0x5f, 0x61, 0x72, 0x72, 0x61, 0x79,
+        0x00, 0x00, 0x00, 0x08, 0x71, 0x35, 0x77, 0x62,
+        0x54, 0x64, 0xf5, 0x32, 0x09, 0x00, 0x09, 0x6c,
+        0x69, 0x73, 0x74, 0x5f, 0x69, 0x6e, 0x74, 0x38,
+        0x01, 0x00, 0x00, 0x00, 0x05, 0x41, 0x60, 0x4e,
+        0x7f, 0xfa, 0x09, 0x00, 0x0c, 0x6c, 0x69, 0x73,
+        0x74, 0x5f, 0x73, 0x74, 0x72, 0x69, 0x6e, 0x67,
+        0x73, 0x08, 0x00, 0x00, 0x00, 0x0c, 0x00, 0x06,
+        0x50, 0x61, 0x63, 0x6d, 0x61, 0x6e, 0x00, 0x03,
+        0x61, 0x74, 0x65, 0x00, 0x03, 0x61, 0x6c, 0x6c,
+        0x00, 0x03, 0x74, 0x68, 0x65, 0x00, 0x04, 0x64,
+        0x6f, 0x74, 0x73, 0x00, 0x02, 0x73, 0x6f, 0x00,
+        0x03, 0x6e, 0x6f, 0x77, 0x00, 0x06, 0x68, 0x65,
+        0xe2, 0x80, 0x99, 0x73, 0x00, 0x06, 0x63, 0x6f,
+        0x6d, 0x69, 0x6e, 0x67, 0x00, 0x03, 0x66, 0x6f,
+        0x72, 0x00, 0x03, 0x74, 0x68, 0x65, 0x00, 0x06,
+        0x77, 0x6f, 0x72, 0x64, 0x73, 0x2e, 0x08, 0x00,
+        0x06, 0x73, 0x74, 0x72, 0x69, 0x6e, 0x67, 0x00,
+        0x0c, 0x48, 0x65, 0x6c, 0x6c, 0x6f, 0x20, 0x57,
+        0x6f, 0x72, 0x6c, 0x64, 0x21, 0x00
+    };
+    uint64_t simpleNBTDataSize = 478;
+
+    //##################################################################
+    // Basic valid data tests
+    //##################################################################
+    // const uint8_t END        =  0;
+    ErrorOr<uint64_t> totalSize = NBT::Helper::totalTagSize(simpleNBTData, simpleNBTDataSize, 0x93);
+    ErrorOr<int32_t> dataLength = NBT::Helper::containedDataLength(simpleNBTData, simpleNBTDataSize, 0x93);
+
+    ASSERT(!totalSize.isError);
+    ASSERT(totalSize.value == 1);
+    ASSERT(!dataLength.isError);
+    ASSERT(dataLength.value == 0);
+
+    totalSize = NBT::Helper::totalTagSize(simpleNBTData, simpleNBTDataSize, 477);
+    dataLength = NBT::Helper::containedDataLength(simpleNBTData, simpleNBTDataSize, 477);
+
+    ASSERT(!totalSize.isError);
+    ASSERT(totalSize.value == 1);
+    ASSERT(!dataLength.isError);
+    ASSERT(dataLength.value == 0);
+
+    //const uint8_t INT8       =  1;
+    totalSize = NBT::Helper::totalTagSize(simpleNBTData, simpleNBTDataSize, 0x133);
+    dataLength = NBT::Helper::containedDataLength(simpleNBTData, simpleNBTDataSize, 0x133);
+
+    ASSERT(!totalSize.isError);
+    ASSERT(totalSize.value == 8);
+    ASSERT(!dataLength.isError);
+    ASSERT(dataLength.value == 1);
+
+    //const uint8_t INT16      =  2;
+    totalSize = NBT::Helper::totalTagSize(simpleNBTData, simpleNBTDataSize, 0xb1);
+    dataLength = NBT::Helper::containedDataLength(simpleNBTData, simpleNBTDataSize, 0xb1);
+
+    ASSERT(!totalSize.isError);
+    ASSERT(totalSize.value == 10);
+    ASSERT(!dataLength.isError);
+    ASSERT(dataLength.value == 1);
+
+    //const uint8_t INT32      =  3;
+    totalSize = NBT::Helper::totalTagSize(simpleNBTData, simpleNBTDataSize, 0xbb);
+    dataLength = NBT::Helper::containedDataLength(simpleNBTData, simpleNBTDataSize, 0xbb);
+
+    ASSERT(!totalSize.isError);
+    ASSERT(totalSize.value == 12);
+    ASSERT(!dataLength.isError);
+    ASSERT(dataLength.value == 1);
+
+    totalSize = NBT::Helper::totalTagSize(simpleNBTData, simpleNBTDataSize, 0x67);
+    dataLength = NBT::Helper::containedDataLength(simpleNBTData, simpleNBTDataSize, 0x67);
+
+    ASSERT(!totalSize.isError);
+    ASSERT(totalSize.value == 18);
+    ASSERT(!dataLength.isError);
+    ASSERT(dataLength.value == 1);
+
+    //const uint8_t INT64      =  4;
+    totalSize = NBT::Helper::totalTagSize(simpleNBTData, simpleNBTDataSize, 0xe9);
+    dataLength = NBT::Helper::containedDataLength(simpleNBTData, simpleNBTDataSize, 0xe9);
+
+    ASSERT(!totalSize.isError);
+    ASSERT(totalSize.value == 16);
+    ASSERT(!dataLength.isError);
+    ASSERT(dataLength.value == 1);
+
+    //const uint8_t FLOAT      =  5;
+    totalSize = NBT::Helper::totalTagSize(simpleNBTData, simpleNBTDataSize, 0xa5);
+    dataLength = NBT::Helper::containedDataLength(simpleNBTData, simpleNBTDataSize, 0xa5);
+
+    ASSERT(!totalSize.isError);
+    ASSERT(totalSize.value == 12);
+    ASSERT(!dataLength.isError);
+    ASSERT(dataLength.value == 1);
+
+    //const uint8_t DOUBLE     =  6;
+    totalSize = NBT::Helper::totalTagSize(simpleNBTData, simpleNBTDataSize, 0x94);
+    dataLength = NBT::Helper::containedDataLength(simpleNBTData, simpleNBTDataSize, 0x94);
+
+    ASSERT(!totalSize.isError);
+    ASSERT(totalSize.value == 17);
+    ASSERT(!dataLength.isError);
+    ASSERT(dataLength.value == 1);
+
+    //const uint8_t INT8_ARRAY =  7;
+    totalSize = NBT::Helper::totalTagSize(simpleNBTData, simpleNBTDataSize, 0x13b);
+    dataLength = NBT::Helper::containedDataLength(simpleNBTData, simpleNBTDataSize, 0x13b);
+
+    ASSERT(!totalSize.isError);
+    ASSERT(totalSize.value == 25);
+    ASSERT(!dataLength.isError);
+    ASSERT(dataLength.value == 8);
+
+    //const uint8_t STRING     =  8;
+    totalSize = NBT::Helper::totalTagSize(simpleNBTData, simpleNBTDataSize, 0x1c6);
+    dataLength = NBT::Helper::containedDataLength(simpleNBTData, simpleNBTDataSize, 0x1c6);
+
+    ASSERT(!totalSize.isError);
+    ASSERT(totalSize.value == 23);
+    ASSERT(!dataLength.isError);
+    ASSERT(dataLength.value == 12);
+
+    totalSize = NBT::Helper::totalTagSize(simpleNBTData, simpleNBTDataSize, 0x79);
+    dataLength = NBT::Helper::containedDataLength(simpleNBTData, simpleNBTDataSize, 0x79);
+
+    ASSERT(!totalSize.isError);
+    ASSERT(totalSize.value == 26);
+    ASSERT(!dataLength.isError);
+    ASSERT(dataLength.value == 12);
+
+    //const uint8_t LIST       =  9;
+    totalSize = NBT::Helper::totalTagSize(simpleNBTData, simpleNBTDataSize, 0x154);
+    dataLength = NBT::Helper::containedDataLength(simpleNBTData, simpleNBTDataSize, 0x154);
+
+    ASSERT(totalSize.isError);
+    ASSERT(totalSize.errorCode == ErrorCodes::NOT_YET_KNOWN);
+    ASSERT(!dataLength.isError);
+    ASSERT(dataLength.value == 5);
+
+    totalSize = NBT::Helper::totalTagSize(simpleNBTData, simpleNBTDataSize, 0x16a);
+    dataLength = NBT::Helper::containedDataLength(simpleNBTData, simpleNBTDataSize, 0x16a);
+
+    ASSERT(totalSize.isError);
+    ASSERT(totalSize.errorCode == ErrorCodes::NOT_YET_KNOWN);
+    ASSERT(!dataLength.isError);
+    ASSERT(dataLength.value == 12);
+
+    //const uint8_t COMPOUND   = 10;
+    totalSize = NBT::Helper::totalTagSize(simpleNBTData, simpleNBTDataSize, 0x5c);
+    dataLength = NBT::Helper::containedDataLength(simpleNBTData, simpleNBTDataSize, 0x5c);
+
+    ASSERT(totalSize.isError);
+    ASSERT(totalSize.errorCode == ErrorCodes::NOT_YET_KNOWN);
+    ASSERT(dataLength.isError);
+    ASSERT(dataLength.errorCode == ErrorCodes::NOT_YET_KNOWN);
+
+    //const uint8_t INT32_ARRAY= 11;
+    totalSize = NBT::Helper::totalTagSize(simpleNBTData, simpleNBTDataSize, 0xc7);
+    dataLength = NBT::Helper::containedDataLength(simpleNBTData, simpleNBTDataSize, 0xc7);
+
+    ASSERT(!totalSize.isError);
+    ASSERT(totalSize.value == 34);
+    ASSERT(!dataLength.isError);
+    ASSERT(dataLength.value == 4);
+
+    //const uint8_t INT64_ARRAY= 12;
+    totalSize = NBT::Helper::totalTagSize(simpleNBTData, simpleNBTDataSize, 0xf9);
+    dataLength = NBT::Helper::containedDataLength(simpleNBTData, simpleNBTDataSize, 0xf9);
+
+    ASSERT(!totalSize.isError);
+    ASSERT(totalSize.value == 58);
+    ASSERT(!dataLength.isError);
+    ASSERT(dataLength.value == 5);
+
+    std::cout << "Passed simple valid data test." << std::endl;
+
+    //TODO: add tests for errors and edge cases
+
+    return 0;
+}

src/tools/arraydump.cpp

@@ -0,0 +1,116 @@
+// Copyright 2022, FOSS-VG Developers and Contributers
+//
+// Author(s):
+//  BodgeMaster
+//
+// This program is free software: you can redistribute it and/or modify it
+// under the terms of the GNU Affero General Public License as published
+// by the Free Software Foundation, version 3.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied
+// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// version 3 along with this program.
+// If not, see https://www.gnu.org/licenses/agpl-3.0.en.html
+
+#include <bitset>
+#include <iomanip>
+#include <iostream>
+#include <vector>
+
+#include "../lib/cli.hpp"
+#include "../lib/file.hpp"
+
+#define EXIT_SUCCESS 0
+#define EXIT_RUNTIME 1
+#define EXIT_USAGE   2
+
+int main(int argc, char* argv[]) {
+    std::vector<CLI::Flag> flags;
+    flags.push_back(CLI::Flag('x', "hexadecimal", "write output as hexadecimal numbers"));
+    flags.push_back(CLI::Flag('o', "octal",       "write output as octal numbers"));
+    flags.push_back(CLI::Flag('b', "binary",      "write output as binary numbers"));
+    flags.push_back(CLI::Flag('h', "help",        "print help and exit"));
+    flags.push_back(CLI::Flag('l', "license",     "print license information and exit"));
+    std::vector<CLI::Option> options;
+    std::vector<CLI::Argument> arguments;
+    arguments.push_back(CLI::Argument("FILE", "path of the file to dump"));
+    CLI::ArgumentsParser cliParser = CLI::ArgumentsParser(argc, argv, flags, options, arguments, "Dump files as C++ array literals");
+
+    if (cliParser.getFlag("help").value) {
+        std::cout << cliParser.getUsage() << std::endl;
+        return EXIT_SUCCESS;
+    }
+
+    if (cliParser.getFlag("license").value){
+        std::cout
+            << "Copyright 2022, FOSS-VG Developers and Contributers\n"
+            << "\n"
+            << "ArrayDump is part of the FOSS-VG development tool suite.\n"
+            << "\n"
+            << "This program is free software: you can redistribute it and/or modify it\n"
+            << "under the terms of the GNU Affero General Public License as published\n"
+            << "by the Free Software Foundation, version 3.\n"
+            << "\n"
+            << "This program is distributed in the hope that it will be useful,\n"
+            << "but WITHOUT ANY WARRANTY; without even the implied\n"
+            << "warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n"
+            << "See the GNU Affero General Public License for more details.\n"
+            << "\n"
+            << "You should have received a copy of the GNU Affero General Public License\n"
+            << "version 3 along with this program.\n"
+            << "If not, see https://www.gnu.org/licenses/agpl-3.0.en.html"
+            << std::endl;
+        return EXIT_SUCCESS;
+    }
+
+    if (cliParser.wrongUsage) {
+        std::cout << cliParser.getUsage() << std::endl;
+        return EXIT_USAGE;
+    }
+
+    ErrorOr<File*> filePointer = File::open(cliParser.getArgument(0).value, 'r');
+    if (filePointer.isError) {
+        std::cout << "Failed to open file: " << cliParser.getArgument(0).value << std::endl;
+        return EXIT_RUNTIME;
+    }
+    File* file = filePointer.value;
+
+    std::cout << "{";
+    if (cliParser.getFlag("hexadecimal").value) {
+        if (!file->eof()) {
+            std::cout << "0x" << std::setw(2) << std::setfill('0') << std::hex << (int) file->readByte().value;
+        }
+        while (!file->eof()) {
+            std::cout << ", 0x" << std::setw(2) << std::setfill('0') << std::hex << (int) file->readByte().value;
+        }
+    } else if (cliParser.getFlag("octal").value) {
+        if (!file->eof()) {
+            std::cout << "0" << std::setw(3) << std::setfill('0') << std::oct << (int) file->readByte().value;
+        }
+        while (!file->eof()) {
+            std::cout << ", 0" << std::setw(3) << std::setfill('0') << std::oct << (int) file->readByte().value;
+        }
+    } else if (cliParser.getFlag("binary").value) {
+        if (!file->eof()) {
+            std::cout << "0b" << std::bitset<8>((int) file->readByte().value);
+        }
+        while (!file->eof()) {
+            std::cout << ", 0b" << std::bitset<8>((int) file->readByte().value);
+        }
+    } else {
+        if (!file->eof()) {
+            std::cout << (int) file->readByte().value;
+        }
+        while (!file->eof()) {
+            std::cout << ", " << (int) file->readByte().value;
+        }
+    }
+    std::cout << "}" << std::endl;
+
+    delete file;
+    return EXIT_SUCCESS;
+}

src/tools/baseconvert.cpp

@@ -0,0 +1,130 @@
+// Copyright 2022, FOSS-VG Developers and Contributers
+//
+// Author(s):
+//  BodgeMaster
+//
+// This program is free software: you can redistribute it and/or modify it
+// under the terms of the GNU Affero General Public License as published
+// by the Free Software Foundation, version 3.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied
+// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// version 3 along with this program.
+// If not, see https://www.gnu.org/licenses/agpl-3.0.en.html
+
+#include <bitset>
+#include <cstdint>
+#include <iostream>
+#include <vector>
+
+#include "../lib/cli.hpp"
+
+#define EXIT_SUCCESS 0
+#define EXIT_RUNTIME 1
+#define EXIT_USAGE   2
+
+int main(int argc, char* argv[]) {
+    std::vector<CLI::Flag> flags;
+    flags.push_back(CLI::Flag('x', "hexadecimal", "base 16"));
+    flags.push_back(CLI::Flag('o', "octal",       "base 8"));
+    flags.push_back(CLI::Flag('b', "binary",      "base 2"));
+    flags.push_back(CLI::Flag('d', "decimal",     "base 10"));
+    flags.push_back(CLI::Flag('h', "help",        "print help and exit"));
+    flags.push_back(CLI::Flag('l', "license",     "print license information and exit"));
+    std::vector<CLI::Option> options;
+    std::vector<CLI::Argument> arguments;
+    arguments.push_back(CLI::Argument("NUMBER", "the number to convert"));
+    CLI::ArgumentsParser cliParser = CLI::ArgumentsParser(argc, argv, flags, options, arguments, "Convert numbers between predefined bases", "This only works for unsigned numbers.\n\tBaseConvert understands the prefixes 0x, 0b, 0o, and 0 in input numbers.");
+
+    if (cliParser.getFlag("help").value) {
+        std::cout << cliParser.getUsage() << std::endl;
+        return EXIT_SUCCESS;
+    }
+
+    if (cliParser.getFlag("license").value){
+        std::cout
+            << "Copyright 2022, FOSS-VG Developers and Contributers\n"
+            << "\n"
+            << "BaseConvert is part of the FOSS-VG development tool suite.\n"
+            << "\n"
+            << "This program is free software: you can redistribute it and/or modify it\n"
+            << "under the terms of the GNU Affero General Public License as published\n"
+            << "by the Free Software Foundation, version 3.\n"
+            << "\n"
+            << "This program is distributed in the hope that it will be useful,\n"
+            << "but WITHOUT ANY WARRANTY; without even the implied\n"
+            << "warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n"
+            << "See the GNU Affero General Public License for more details.\n"
+            << "\n"
+            << "You should have received a copy of the GNU Affero General Public License\n"
+            << "version 3 along with this program.\n"
+            << "If not, see https://www.gnu.org/licenses/agpl-3.0.en.html"
+            << std::endl;
+        return EXIT_SUCCESS;
+    }
+
+    if (cliParser.wrongUsage) {
+        std::cout << cliParser.getUsage() << std::endl;
+        return EXIT_USAGE;
+    }
+
+    std::string numberString = cliParser.getArgument(0).value;
+    uint8_t base = 10;
+    uint64_t* number = new uint64_t;
+
+    if (numberString == "") {
+        std::cerr << "Empty string is not a valid number." << std::endl;
+        return EXIT_RUNTIME;
+    }
+    if (numberString[0] == '0') {
+        if (numberString.substr(0, 2)=="0x" || numberString.substr(0, 2)=="0X") {
+            base = 16;
+            numberString = numberString.substr(2, numberString.length()-2);
+        } else if (numberString.substr(0, 2)=="0b" || numberString.substr(0, 2)=="0B") {
+            base = 2;
+            numberString = numberString.substr(2, numberString.length()-2);
+        } else if (numberString.substr(0, 2)=="0o" || numberString.substr(0, 2)=="0O") {
+            base = 8;
+            numberString = numberString.substr(2, numberString.length()-2);
+        } else {
+            base = 8;
+        }
+    }
+
+    *number = std::stoull(numberString, nullptr, base);
+
+    if (cliParser.getFlag("hexadecimal").value) {
+        std::cout << "0x" << std::hex << *number << std::endl;
+    } else if (cliParser.getFlag("octal").value) {
+        *number==0? std::cout << "0" << std::endl : std::cout << "0" << std::oct << *number << std::endl;
+    } else if (cliParser.getFlag("binary").value) {
+        std::bitset<64> bitset = std::bitset<64>(*number);
+        bool foundFirstBit = false;
+        std::cout << "0b";
+        for (uint8_t i=0; i<64; i++) {
+            if (bitset[63-i]) {
+                std::cout << "1";
+                foundFirstBit = true;
+            } else if (foundFirstBit) {
+                std::cout << "0";
+            }
+        }
+        if (!foundFirstBit) {
+            std::cout << "0";
+        }
+        std::cout << std::endl;
+    } else if (cliParser.getFlag("decimal").value) {
+        std::cout << *number << std::endl;
+    } else {
+        std::cout << cliParser.getUsage() << std::endl;
+        return EXIT_USAGE;
+    }
+
+    delete number;
+
+    return EXIT_SUCCESS;
+}

src/tools/dumpnbt.cpp

@@ -13,8 +13,360 @@
 // version 3 along with this program.
 // If not, see https://www.gnu.org/licenses/agpl-3.0.en.html
 
-#include "../lib/nbt.h++"
+#include <iostream>
+#include <fstream>
+#include <vector>
+#include <tinyutf8/tinyutf8.h>
+
+#include "../lib/nbt.hpp"
+#include "../lib/cli.hpp"
+
+#define EXIT_SUCCESS 0
+#define EXIT_RUNTIME 1
+#define EXIT_USAGE 2
+#define EXIT_UNIMPLEMENTED 3
+
+void printTagTypeName(NBT::Tag::Generic* tag, uint64_t offsetBytes) {
+    std::cout << "[" << offsetBytes << ": ";
+    switch (tag->getTagType()) {
+        case NBT::TagType::END:
+            std::cout << "End";
+            break;
+        case NBT::TagType::INT8:
+            std::cout << "8 Bit Integer";
+            break;
+        case NBT::TagType::INT16:
+            std::cout << "16 Bit Integer";
+            break;
+        case NBT::TagType::INT32:
+            std::cout << "32 Bit Integer";
+            break;
+        case NBT::TagType::INT64:
+            std::cout << "64 Bit Integer";
+            break;
+        case NBT::TagType::FLOAT:
+            std::cout << "Float";
+            break;
+        case NBT::TagType::DOUBLE:
+            std::cout << "Double";
+            break;
+        case NBT::TagType::INT8_ARRAY:
+            std::cout << "Array of 8 Bit Integers";
+            break;
+        case NBT::TagType::STRING:
+            std::cout << "String";
+            break;
+        case NBT::TagType::LIST:
+            std::cout << "List";
+            break;
+        case NBT::TagType::COMPOUND:
+            std::cout << "Compound";
+            break;
+        case NBT::TagType::INT32_ARRAY:
+            std::cout << "Array of 32 Bit Integers";
+            break;
+        case NBT::TagType::INT64_ARRAY:
+            std::cout << "Array of 64 Bit Integers";
+            break;
+        default:
+            // WTF? How'd you even get here?
+            std::cout << "Unknown Type";
+    }
+    std::cout << "]";
+    if (tag->name == "") {
+        std::cout << ":";
+    } else {
+        std::cout << " " << tag->name << ":";
+    }
+}
+
+void printNBytes(uint64_t bytes) {
+    std::cout << bytes << (bytes==1? " byte":" bytes");
+}
+
+void drawTree(NBT::Tag::Generic* tag, tiny_utf8::string prefix, uint64_t offsetBytes, bool listMode=false) {
+    std::vector<uint8_t> serialized;
+    uint64_t headerSize = 0;
+    if (listMode) {
+        tag->serializeWithoutHeader(&serialized);
+
+        std::cout << prefix << "|–Payload: ";
+        printNBytes(serialized.size());
+        std::cout << std::endl;
+    } else {
+        tag->serialize(&serialized);
+        if (tag->getTagType() == NBT::TagType::END) {
+            headerSize = 1;
+        } else {
+            headerSize = (uint64_t) NBT::Helper::readInt16(serialized.data(), serialized.size(), 1).value+3;
+        }
+
+        std::cout << prefix << "|–Header: ";
+        printNBytes(headerSize);
+        std::cout << std::endl;
+        std::cout << prefix << "|–Payload: ";
+        printNBytes(serialized.size() - headerSize);
+        std::cout << std::endl;
+    }
+    if (tag->getTagType() == NBT::TagType::END) {
+        std::cout << prefix << "'–Total: ";
+    } else {
+        std::cout << prefix << "|–Total: ";
+    }
+    printNBytes(serialized.size());
+    std::cout << std::endl;
+
+    switch (tag->getTagType()) {
+        case NBT::TagType::END:
+            break;
+        case NBT::TagType::INT8:
+            std::cout << prefix << "'–Value: " << (int32_t) reinterpret_cast<NBT::Tag::Int8*>(tag)->getValue() << std::endl;
+            break;
+        case NBT::TagType::INT16:
+            std::cout << prefix << "'–Value: " << (int32_t) reinterpret_cast<NBT::Tag::Int16*>(tag)->getValue() << std::endl;
+            break;
+        case NBT::TagType::INT32:
+            std::cout << prefix << "'–Value: " << reinterpret_cast<NBT::Tag::Int32*>(tag)->getValue() << std::endl;
+            break;
+        case NBT::TagType::INT64:
+            std::cout << prefix << "'–Value: " << reinterpret_cast<NBT::Tag::Int64*>(tag)->getValue() << std::endl;
+            break;
+        case NBT::TagType::FLOAT:
+            std::cout << prefix << "'–Value: " << reinterpret_cast<NBT::Tag::Float*>(tag)->getValue() << std::endl;
+            break;
+        case NBT::TagType::DOUBLE:
+            std::cout << prefix << "'–Value: " << reinterpret_cast<NBT::Tag::Double*>(tag)->getValue() << std::endl;
+            break;
+        case NBT::TagType::INT8_ARRAY: {
+            NBT::Tag::Int8Array* array = reinterpret_cast<NBT::Tag::Int8Array*>(tag);
+            std::cout << prefix << "|–Length: " << array->length() << std::endl;
+            std::cout << prefix << "'–Values: " << std::endl;
+            for (uint64_t i=0; i<array->length(); i++) {
+                if (i == array->length()-1) {
+                    std::cout << prefix << "  '–" << (int64_t) array->getValue(i).value << std::endl;
+                } else {
+                    std::cout << prefix << "  |–" << (int64_t) array->getValue(i).value << std::endl;
+                }
+            }
+            break;
+        }
+        case NBT::TagType::STRING:
+            std::cout << prefix << "'–Value: " << reinterpret_cast<NBT::Tag::String*>(tag)->getValue() << std::endl;
+            break;
+        case NBT::TagType::LIST: {
+            NBT::Tag::List* list = reinterpret_cast<NBT::Tag::List*>(tag);
+
+            std::cout << prefix << "|–Contained Type: ";
+            switch (list->getContainedType()) {
+                case NBT::TagType::END:
+                    std::cout << "End";
+                    break;
+                case NBT::TagType::INT8:
+                    std::cout << "8 Bit Integer";
+                    break;
+                case NBT::TagType::INT16:
+                    std::cout << "16 Bit Integer";
+                    break;
+                case NBT::TagType::INT32:
+                    std::cout << "32 Bit Integer";
+                    break;
+                case NBT::TagType::INT64:
+                    std::cout << "64 Bit Integer";
+                    break;
+                case NBT::TagType::FLOAT:
+                    std::cout << "Float";
+                    break;
+                case NBT::TagType::DOUBLE:
+                    std::cout << "Double";
+                    break;
+                case NBT::TagType::INT8_ARRAY:
+                    std::cout << "Array of 8 Bit Integers";
+                    break;
+                case NBT::TagType::STRING:
+                    std::cout << "String";
+                    break;
+                case NBT::TagType::LIST:
+                    std::cout << "List";
+                    break;
+                case NBT::TagType::COMPOUND:
+                    std::cout << "Compound";
+                    break;
+                case NBT::TagType::INT32_ARRAY:
+                    std::cout << "Array of 32 Bit Integers";
+                    break;
+                case NBT::TagType::INT64_ARRAY:
+                    std::cout << "Array of 64 Bit Integers";
+                    break;
+                default:
+                    // WTF? How'd you even get here?
+                    std::cout << "Unknown Type";
+            }
+            std::cout << std::endl;
+
+            if (list->length() > 0) {
+                std::cout << prefix << "|–Length: " << list->length() << std::endl;
+                std::cout << prefix << "|" << std::endl;
+            } else {
+                std::cout << prefix << "'–Length: " << list->length() << std::endl;
+            }
+
+            offsetBytes = offsetBytes + headerSize + 5;
+            for (uint64_t i=0; i<list->length(); i++) {
+                if (i == list->length()-1) {
+                    std::cout << prefix << "'–";
+                    printTagTypeName(list->getElementPointer(i).value, offsetBytes);
+                    std::cout << std::endl;
+                    drawTree(list->getElementPointer(i).value, prefix+"  ", offsetBytes, true);
+                } else {
+                    std::cout << prefix << "|–";
+                    printTagTypeName(list->getElementPointer(i).value, offsetBytes);
+                    std::cout << std::endl;
+                    drawTree(list->getElementPointer(i).value, prefix+"| ", offsetBytes, true);
+                }
+
+                std::vector<uint8_t> serializedElement;
+                list->getElementPointer(i).value->serializeWithoutHeader(&serializedElement);
+                offsetBytes += serializedElement.size();
+            }
+            break;
+            }
+        case NBT::TagType::COMPOUND: {
+            NBT::Tag::Compound* compound = reinterpret_cast<NBT::Tag::Compound*>(tag);
+
+            std::cout << prefix << "|–Length: " << compound->length() << std::endl;
+            std::cout << prefix << "|" << std::endl;
+
+            offsetBytes = offsetBytes + headerSize;
+            for (uint64_t i=0; i<compound->length(); i++) {
+                if (i == compound->length()-1) {
+                    std::cout << prefix << "'–";
+                    printTagTypeName(compound->getElementPointer(i).value, offsetBytes);
+                    std::cout << std::endl;
+                    drawTree(compound->getElementPointer(i).value, prefix+"  ", offsetBytes);
+                } else {
+                    std::cout << prefix << "|–";
+                    printTagTypeName(compound->getElementPointer(i).value, offsetBytes);
+                    std::cout << std::endl;
+                    drawTree(compound->getElementPointer(i).value, prefix+"| ", offsetBytes);
+                }
+
+                std::vector<uint8_t> serializedElement;
+                compound->getElementPointer(i).value->serialize(&serializedElement);
+                offsetBytes += serializedElement.size();
+            }
+            break;
+        }
+        case NBT::TagType::INT32_ARRAY: {
+            NBT::Tag::Int32Array* array = reinterpret_cast<NBT::Tag::Int32Array*>(tag);
+            std::cout << prefix << "|–Length: " << array->length() << std::endl;
+            std::cout << prefix << "'–Values: " << std::endl;
+            for (uint64_t i=0; i<array->length(); i++) {
+                if (i == array->length()-1) {
+                    std::cout << prefix << "  '–" << array->getValue(i).value << std::endl;
+                } else {
+                    std::cout << prefix << "  |–" << array->getValue(i).value << std::endl;
+                }
+            }
+            break;
+        }
+        case NBT::TagType::INT64_ARRAY: {
+            NBT::Tag::Int64Array* array = reinterpret_cast<NBT::Tag::Int64Array*>(tag);
+            std::cout << prefix << "|–Length: " << array->length() << std::endl;
+            std::cout << prefix << "'–Values: " << std::endl;
+            for (uint64_t i=0; i<array->length(); i++) {
+                if (i == array->length()-1) {
+                    std::cout << prefix << "  '–" << array->getValue(i).value << std::endl;
+                } else {
+                    std::cout << prefix << "  |–" << array->getValue(i).value << std::endl;
+                }
+            }
+            break;
+        }
+        default:
+            // WTF? How'd you even get here?
+            std::cout << prefix << "'–???" << std::endl;
+    }
+
+    std::cout << prefix << std::endl;
+}
 
 int main(int argc, char* argv[]) {
-    return 0;
+    std::vector<CLI::Flag> flags;
+    flags.push_back(CLI::Flag('h', "help", "print help and exit"));
+    flags.push_back(CLI::Flag('l', "license", "print license information and exit"));
+    flags.push_back(CLI::Flag('x', "hexadecimal", "print numbers in hex format"));
+    std::vector<CLI::Option> options;
+    std::vector<CLI::Argument> arguments;
+    arguments.push_back(CLI::Argument("FILE", "path of the file to dump"));
+
+    CLI::ArgumentsParser cliParser = CLI::ArgumentsParser(argc, argv, flags, options, arguments, "Present NBT in human or machine readable formats");
+
+    if (cliParser.getFlag("help").value){
+        std::cout << cliParser.getUsage() << std::endl;
+        return EXIT_SUCCESS;
+    }
+    if (cliParser.getFlag("license").value){
+        std::cout
+            << "Copyright 2022, FOSS-VG Developers and Contributers\n"
+            << "\n"
+            << "DumpNBT is part of the FOSS-VG development tool suite.\n"
+            << "\n"
+            << "This program is free software: you can redistribute it and/or modify it\n"
+            << "under the terms of the GNU Affero General Public License as published\n"
+            << "by the Free Software Foundation, version 3.\n"
+            << "\n"
+            << "This program is distributed in the hope that it will be useful,\n"
+            << "but WITHOUT ANY WARRANTY; without even the implied\n"
+            << "warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n"
+            << "See the GNU Affero General Public License for more details.\n"
+            << "\n"
+            << "You should have received a copy of the GNU Affero General Public License\n"
+            << "version 3 along with this program.\n"
+            << "If not, see https://www.gnu.org/licenses/agpl-3.0.en.html"
+            << std::endl;
+        return EXIT_SUCCESS;
+    }
+
+    if (cliParser.wrongUsage) {
+        std::cerr << cliParser.getUsage() << std::endl;
+        return EXIT_USAGE;
+    }
+
+    std::ifstream fileStream;
+    fileStream.open(cliParser.getArgument(0).value, std::ios::in | std::ios::binary | std::ios::ate);
+    if (!fileStream.is_open()) {
+        std::cerr << argv[0] << ": Could not open file: " << cliParser.getArgument(0).value << std::endl;
+        return EXIT_RUNTIME;
+    }
+
+    uint64_t fileSize = fileStream.tellg();
+    fileStream.seekg(0, std::ios::beg);
+
+    uint8_t data[fileSize];
+    uint8_t* nextByte = new uint8_t;
+
+    for (uint64_t i=0; i<fileSize; i++) {
+        fileStream.read(reinterpret_cast<char*>(nextByte), 1);
+        data[i] = *nextByte;
+    }
+    fileStream.close();
+
+    ErrorOr<std::vector<NBT::Tag::Generic*>> tags = NBT::deserialize(data, fileSize);
+    if (tags.isError) {
+        std::cerr << "Invalid data." << std::endl;
+        return EXIT_RUNTIME;
+    }
+
+    uint64_t offsetBytes = 0;
+    for (uint64_t i=0; i<tags.value.size(); i++) {
+        printTagTypeName(tags.value[i], offsetBytes);
+        std::cout << std::endl;
+        drawTree(tags.value[i], "", offsetBytes);
+
+        std::vector<uint8_t> serialized;
+        tags.value[i]->serialize(&serialized);
+        offsetBytes += serialized.size();
+    }
+
+    return EXIT_SUCCESS;
 }

src/tools/hexnet.cpp

@@ -1,5 +1,8 @@
 //Copyright 2022, FOSS-VG Developers and Contributers
 //
+// Author(s):
+//   BodgeMaster, Shwoomple
+//
 //This program is free software: you can redistribute it and/or modify it
 //under the terms of the GNU Affero General Public License as published
 //by the Free Software Foundation, version 3.
@@ -13,68 +16,479 @@
 //version 3 along with this program.
 //If not, see https://www.gnu.org/licenses/agpl-3.0.en.html
 
+#include <chrono>
+#include <csignal>
+#include <iomanip>
 #include <iostream>
+#include <mutex>
 #include <string>
-#include <cstdint>
-#include <cctype>
+#include <sockpp/tcp_acceptor.h>
+#include <sockpp/tcp_connector.h>
+#include <sockpp/tcp6_acceptor.h>
+#include <sockpp/tcp6_connector.h>
+#include <sockpp/udp_socket.h>
+#include <sockpp/udp6_socket.h>
+#include <thread>
+#include <vector>
 
-#include "../lib/error.h++"
-#include "../lib/cli.h++"
+#include "../lib/cli.hpp"
+#include "../lib/error.hpp"
 
 #define EXIT_SUCCESS 0
 #define EXIT_RUNTIME 1
 #define EXIT_USAGE 2
 #define EXIT_UNIMPLEMENTED 3
+#define EXIT_SIGNAL 4
 
-int main(int argc, char* argv[]){
+// TCP v4 server
+sockpp::tcp_socket tcpSocket;
+sockpp::tcp_acceptor tcpAcceptor;
+// TCP v4 client
+sockpp::tcp_connector tcpConnector;
+// TCP v6 server
+sockpp::tcp6_socket tcp6Socket;
+sockpp::tcp6_acceptor tcp6Acceptor;
+// TCP v6 client
+sockpp::tcp6_connector tcp6Connector;
+// UDP v4 server and client
+sockpp::udp_socket udpSocket;
+// UDP v6 server and client
+sockpp::udp6_socket udp6Socket;
 
-    // Argument parsing ################################################
-    bool ipv4 = true;
-    bool ipv6 = true;
-    bool tcp = true;
-    bool udp = true;
-    bool listen = false;
-    std::string host;
-    uint16_t port;
+bool exitProgram = false;
+
+bool ipv4 = false;
+bool ipv6 = false;
+bool tcp = false;
+bool udp = false;
+bool outgoing = false;
+std::string host;
+in_port_t port;
+
+// This is probably bigger than the MTU on any given network.
+// This should allow us to read entire packets at once when they arrive
+// slowly enough to be read individually.
+const uint32_t bufferSize = 2048;
+uint8_t networkBuffer[bufferSize];
+
+std::string readByteFromStdin() {
+    std::string input = "";
+    // read 2 characters from stdin
+    char characterInput;
+    bool readByte = false;
+    uint16_t iterationsSinceLastInput = 0;
+    while (input.length() < 2 && !exitProgram) {
+        if (std::cin.good()) {
+            std::cin.get(characterInput);
+            readByte = true;
+        } else {
+            readByte = false;
+        }
+        // ignore space, tabs, and newlines
+        if (readByte && characterInput!=' ' && characterInput!='\n' && characterInput!='\r' && characterInput!='\t') {
+            input.push_back(characterInput);
+        }
+
+        iterationsSinceLastInput++;
+        if (readByte) {
+            iterationsSinceLastInput = 0;
+        }
+        if (iterationsSinceLastInput>1024) {
+            // prevent integer overflow
+            iterationsSinceLastInput = 1024;
+
+            std::this_thread::sleep_for(std::chrono::milliseconds(1000));
+        }
+    }
+    return exitProgram? "" : std::string(1, (char) std::stoi(input, nullptr, 16));
+}
+
+void signalHandler(int signal) {
+    // shut down gracefully
+    exitProgram = true;
+
+    // tell sockpp to close TCP socket if open because it blocks when trying
+    // to read and there is no data
+    tcpAcceptor.shutdown();
+    if (tcpSocket) {
+        tcpSocket.shutdown(SHUT_RD);
+    }
+
+    if (tcpConnector) {
+        tcpConnector.shutdown(SHUT_RD);
+    }
+
+    if (tcp6Socket) {
+        tcp6Socket.shutdown(SHUT_RD);
+    }
+
+    if (tcp6Connector) {
+        tcp6Connector.shutdown(SHUT_RD);
+    }
+
+    if (udpSocket) {
+        udpSocket.shutdown(SHUT_RD);
+    }
+
+    if (udp6Socket) {
+        udp6Socket.shutdown(SHUT_RD);
+    }
+
+    std::cerr << "Received signal " << signal << ", bye!" << std::endl;
+    std::exit(EXIT_SIGNAL);
+}
+
+void readFromTCP() {
+    ssize_t byteCount;
+    while (!exitProgram && (outgoing? (byteCount = tcpConnector.read(networkBuffer, bufferSize)) > 0 : (byteCount = tcpSocket.read(networkBuffer, bufferSize)) > 0)) {
+        for (ssize_t i=0; i<byteCount; i++) {
+            std::cout << std::hex << std::setfill('0') << std::setw(2) << (short) networkBuffer[i] << " ";
+        }
+        std::cout.flush();
+    }
+}
+
+void writeToTCP() {
+    while (!exitProgram) {
+        if (outgoing) {
+            if (tcpConnector.write(readByteFromStdin()) == -1 && !exitProgram) {
+                exitProgram = true;
+                tcpConnector.shutdown(SHUT_RD);
+                std::cerr << "Error while sending data: " << tcpConnector.last_error_str() << std::endl;
+                return;
+            }
+        } else {
+            if (tcpSocket.write(readByteFromStdin()) == -1 && !exitProgram) {
+                exitProgram = true;
+                tcpSocket.shutdown(SHUT_RD);
+                std::cerr << "Error while sending data: " << tcpSocket.last_error_str() << std::endl;
+                return;
+            }
+        }
+    }
+}
+
+void readFromTCP6() {
+    ssize_t byteCount;
+    while (!exitProgram && (outgoing? (byteCount = tcp6Connector.read(networkBuffer, bufferSize)) > 0 : (byteCount = tcp6Socket.read(networkBuffer, bufferSize)) > 0)) {
+        for (ssize_t i=0; i<byteCount; i++) {
+            std::cout << std::hex << std::setfill('0') << std::setw(2) << (short) networkBuffer[i] << " ";
+        }
+        std::cout.flush();
+    }
+}
+
+void writeToTCP6() {
+    while (!exitProgram) {
+        if (outgoing) {
+            if (tcp6Connector.write(readByteFromStdin()) == -1 && !exitProgram) {
+                exitProgram = true;
+                tcp6Connector.shutdown(SHUT_RD);
+                std::cerr << "Error while sending data: " << tcp6Connector.last_error_str() << std::endl;
+                return;
+            }
+        } else {
+            if (tcp6Socket.write(readByteFromStdin()) == -1 && !exitProgram) {
+                exitProgram = true;
+                tcp6Socket.shutdown(SHUT_RD);
+                std::cerr << "Error while sending data: " << tcp6Socket.last_error_str() << std::endl;
+                return;
+            }
+        }
+    }
+}
+
+void readFromUDP() {
+    ssize_t byteCount;
+    sockpp::udp_socket::addr_t peer;
+    while ((byteCount = udpSocket.recv_from(networkBuffer, bufferSize, &peer)) > 0) {
+        std::cout << peer << ": ";
+        for (ssize_t i=0; i<byteCount; i++) {
+            std::cout << std::hex << std::setfill('0') << std::setw(2) << (short) networkBuffer[i] << " ";
+        }
+        std::cout << std::dec << std::endl;
+    }
+}
+
+void writeToUDP(sockpp::udp_socket::addr_t peer) {
+    while (!exitProgram) {
+        if (udpSocket.send_to(readByteFromStdin(), peer) == -1 && !exitProgram) {
+            exitProgram = true;
+            udpSocket.shutdown(SHUT_RD);
+            std::cerr << "Error while sending data: " << udpSocket.last_error_str() << std::endl;
+            return;
+        }
+    }
+}
+
+void readFromUDP6() {
+    ssize_t byteCount;
+    sockpp::udp6_socket::addr_t peer;
+    while ((byteCount = udp6Socket.recv_from(networkBuffer, bufferSize, &peer)) > 0) {
+        std::cout << peer << ": ";
+        for (ssize_t i=0; i<byteCount; i++) {
+            std::cout << std::hex << std::setfill('0') << std::setw(2) << (short) networkBuffer[i] << " ";
+        }
+        std::cout << std::dec << std::endl;
+    }
+}
+
+void writeToUDP6(sockpp::udp6_socket::addr_t peer) {
+    while (!exitProgram) {
+        if (udp6Socket.send_to(readByteFromStdin(), peer) == -1 && !exitProgram) {
+            exitProgram = true;
+            udp6Socket.shutdown(SHUT_RD);
+            std::cerr << "Error while sending data: " << udp6Socket.last_error_str() << std::endl;
+            return;
+        }
+    }
+}
+
+int main(int argc, char* argv[]) {
+    std::signal(SIGINT, signalHandler);
+    std::signal(SIGTERM, signalHandler);
 
     std::vector<CLI::Flag> flags;
-    flags.push_back(CLI::Flag('4', "ipv4", "use IPv4, defaults to both when -4 and -6 are omitted, otherwise uses what is specified"));
-    flags.push_back(CLI::Flag('6', "ipv6", "use IPv6, defaults to both when -4 and -6 are omitted, otherwise uses what is specified"));
-    flags.push_back(CLI::Flag('t', "tcp", "use TCP, defaults to both when -t and -u are omitted, otherwise uses what is specified"));
-    flags.push_back(CLI::Flag('u', "udp", "use UDP, defaults to both when -t and -u are omitted, otherwise uses what is specified"));
+    flags.push_back(CLI::Flag('4', "ipv4", "use IPv4, either this or IPv6 has to be specified"));
+    flags.push_back(CLI::Flag('6', "ipv6", "use IPv6, either this or IPv4 has to be specified"));
+    flags.push_back(CLI::Flag('t', "tcp", "use TCP, either this or UDP has to be specified"));
+    flags.push_back(CLI::Flag('u', "udp", "use UDP, either this or TCP has to be specified"));
+    flags.push_back(CLI::Flag('h', "help", "print this information and exit"));
+    flags.push_back(CLI::Flag('l', "license", "print license information and exit"));
 
-    std::vector<CLI::UnpositionalArgument> unpositionalArguments;
-    unpositionalArguments.push_back(CLI::UnpositionalArgument('c', "connect", "HOST", "connect to HOST, listen for incoming connections if omitted"));
+    std::vector<CLI::Option> options;
+    options.push_back(CLI::Option('c', "connect", "HOST", "make an outgoing connection to HOST instead of listening for an incoming connection"));
+    options.push_back(CLI::Option('b', "bind", "ADDRESS", "(UDP only) bind to ADDRESS instead of localhost"));
 
-    std::vector<CLI::PositionalArgument> positionalArguments;
-    positionalArguments.push_back(CLI::PositionalArgument("PORT", "the port to use"));
+    std::vector<CLI::Argument> arguments;
+    arguments.push_back(CLI::Argument("PORT", "the port to lsiten on (or connect to)"));
 
-    CLI::ArgumentsParser cliParser = CLI::ArgumentsParser(argc, argv, flags, unpositionalArguments, positionalArguments);
+    CLI::ArgumentsParser cliParser = CLI::ArgumentsParser(argc, argv, flags, options, arguments, "Arbitrary TCP/UDP connections in hex format", "Spaces, tabs, newlines, and carriage returns in the input are ignored.\n\tYou may want to disable input echoing using `stty -echo` (reenable using `stty echo`).\n\tNote that many terminals do line buffering on the input by default.");
 
+    if (cliParser.getFlag("help").value) {
+        std::cout << cliParser.getUsage() << std::endl;
+        return EXIT_SUCCESS;
+    }
+    if (cliParser.getFlag("license").value) {
+        std::cout
+            << "Copyright 2022, FOSS-VG Developers and Contributers\n"
+            << "\n"
+            << "Hexnet is part of the FOSS-VG development tool suite.\n"
+            << "\n"
+            << "This program is free software: you can redistribute it and/or modify it\n"
+            << "under the terms of the GNU Affero General Public License as published\n"
+            << "by the Free Software Foundation, version 3.\n"
+            << "\n"
+            << "This program is distributed in the hope that it will be useful,\n"
+            << "but WITHOUT ANY WARRANTY; without even the implied\n"
+            << "warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n"
+            << "See the GNU Affero General Public License for more details.\n"
+            << "\n"
+            << "You should have received a copy of the GNU Affero General Public License\n"
+            << "version 3 along with this program.\n"
+            << "If not, see https://www.gnu.org/licenses/agpl-3.0.en.html"
+            << std::endl;
+        return EXIT_SUCCESS;
+    }
     if (cliParser.wrongUsage) {
-        //TODO: spit out usage information generated by the parser
+        std::cout << cliParser.getUsage() << std::endl;
         return EXIT_USAGE;
     }
-    if (cliParser.getFlag('4').value || cliParser.getFlag('6').value) {
-        ipv4 = cliParser.getFlag('4').value;
-        ipv6 = cliParser.getFlag('6').value;
-    }
-    if (cliParser.getFlag('t').value || cliParser.getFlag('u').value) {
-        tcp = cliParser.getFlag('t').value;
-        udp = cliParser.getFlag('u').value;
-    }
-    if (cliParser.getUnpositionalArgument('c').errorCode == ErrorCodes::NOT_PRESENT) {
-        listen = true;
-    }
-    host = cliParser.getUnpositionalArgument('c').value;
-    //FIXME: use a function that returns a fixed-width data type instead
-    port = (uint16_t) std::stoi(cliParser.getPositionalArgument(0).value);
 
-    std::cerr << "Port: " << (int) port << std::endl;
-    std::cerr << (listen? "Listening" : "Host: ") << host << std::endl;
-    std::cerr << "IPv4: " << (ipv4? "yes" : "no") << std::endl;
-    std::cerr << "IPv6: " << (ipv6? "yes" : "no") << std::endl;
-    std::cerr << "TCP:  " << ( tcp? "yes" : "no") << std::endl;
-    std::cerr << "UDP:  " << ( udp? "yes" : "no") << std::endl;
-    return EXIT_UNIMPLEMENTED;
+    ipv4 = cliParser.getFlag("ipv4").value;
+    ipv6 = cliParser.getFlag("ipv6").value;
+    tcp = cliParser.getFlag("tcp").value;
+    udp = cliParser.getFlag("udp").value;
+
+    if (cliParser.getOption("connect").errorCode != ErrorCodes::NOT_PRESENT) {
+        outgoing = true;
+        host = cliParser.getOption("connect").value;
+    }
+
+    if (!(ipv4 || ipv6) || (ipv4 && ipv6) || !(tcp || udp) || (tcp && udp)) {
+        std::cout << "Please specify which protocols to use (one of IPv4/IPv6, one of TCP/UDP)." << std::endl;
+        return EXIT_USAGE;
+    }
+
+    port = (in_port_t) std::stoi(cliParser.getArgument(0).value);
+
+    if (outgoing) {
+        if (tcp) {
+            std::cerr << "Connecting to " << host << " on port " << (int) port << " (TCP)..." << std::endl;
+            if (ipv4) {
+                // TCP v4 out
+                tcpConnector = sockpp::tcp_connector({host, port});
+                if (!tcpConnector) {
+                    std::cerr << "Error connecting to " << host << " on port " << port << std::endl;
+                    std::cerr << tcpConnector.last_error_str() << std::endl;
+                    return EXIT_RUNTIME;
+                }
+
+                std::thread threadReadFromTCP = std::thread(readFromTCP);
+                std::thread threadWriteToTCP = std::thread(writeToTCP);
+
+                threadReadFromTCP.join();
+                threadWriteToTCP.join();
+
+                std::cout << std::endl;
+                return EXIT_SUCCESS;
+            } else {
+                // TCP v6 out
+                tcp6Connector = sockpp::tcp6_connector({host, port});
+                if (!tcp6Connector) {
+                    std::cerr << "Error connecting to " << host << " on port " << port << std::endl;
+                    std::cerr << tcp6Connector.last_error_str() << std::endl;
+                    return EXIT_RUNTIME;
+                }
+
+                std::thread threadReadFromTCP6 = std::thread(readFromTCP6);
+                std::thread threadWriteToTCP6 = std::thread(writeToTCP6);
+
+                threadReadFromTCP6.join();
+                threadWriteToTCP6.join();
+
+                std::cout << std::endl;
+                return EXIT_SUCCESS;
+            }
+        } else {
+            std::cerr << "Talking to " << host << " on port " << (int) port << " (UDP)..." << std::endl;
+            if (ipv4) {
+                // UDP v4 out
+                if (!udpSocket) {
+                    std::cerr << "Error creating UDP socket: " << udpSocket.last_error_str() << std::endl;
+                }
+                // Btw: Did you know that UDP has no concept of a connection?
+                sockpp::udp_socket::addr_t peer = sockpp::inet_address(host, port);
+                if (!udpSocket.connect(peer)) {
+                    std::cerr << "Error associating socket with " << host << " port " << port << std::endl;
+                    std::cerr << udpSocket.last_error_str() << std::endl;
+                }
+
+                std::thread threadReadFromUDP = std::thread(readFromUDP);
+                std::thread threadWriteToUDP = std::thread(writeToUDP, peer);
+
+                threadReadFromUDP.join();
+                threadWriteToUDP.join();
+
+                std::cout << std::endl;
+                return EXIT_SUCCESS;
+            } else {
+                // UDP v6 out
+                if (!udp6Socket) {
+                    std::cerr << "Error creating UDP socket: " << udp6Socket.last_error_str() << std::endl;
+                }
+                // Btw: Did you know that UDP has no concept of a connection?
+                sockpp::udp6_socket::addr_t peer = sockpp::inet6_address(host, port);
+                if (!udp6Socket.connect(peer)) {
+                    std::cerr << "Error associating socket with " << host << " port " << port << std::endl;
+                    std::cerr << udp6Socket.last_error_str() << std::endl;
+                }
+
+                std::thread threadReadFromUDP6 = std::thread(readFromUDP6);
+                std::thread threadWriteToUDP6 = std::thread(writeToUDP6, peer);
+
+                threadReadFromUDP6.join();
+                threadWriteToUDP6.join();
+
+                std::cout << std::endl;
+                return EXIT_SUCCESS;
+            }
+        }
+    } else {
+        if (tcp) {
+            std::cerr << "Listening on port " << (int) port << " (TCP)..." << std::endl;
+            if (ipv4) {
+                // TCP v4 in
+                tcpAcceptor = sockpp::tcp_acceptor(port);
+                if (!tcpAcceptor) {
+                    std::cerr << "Error while creating TCP acceptor: " << tcpAcceptor.last_error_str() << std::endl;
+                    return EXIT_RUNTIME;
+                }
+
+                sockpp::inet_address peer;
+                tcpSocket = tcpAcceptor.accept(&peer);
+                std::cerr << "Incoming connection from " << peer << std::endl;
+                if (!tcpSocket) {
+                    std::cerr << "Error on incoming connection: " << tcpAcceptor.last_error_str() << std::endl;
+                    return EXIT_RUNTIME;
+                }
+
+                std::thread threadReadFromTCP = std::thread(readFromTCP);
+                std::thread threadWriteToTCP = std::thread(writeToTCP);
+
+                threadReadFromTCP.join();
+                threadWriteToTCP.join();
+
+                std::cout << std::endl;
+                return EXIT_SUCCESS;
+            } else {
+                // TCP v6 in
+                tcp6Acceptor = sockpp::tcp6_acceptor(port);
+                if (!tcp6Acceptor) {
+                    std::cerr << "Error while creating TCP acceptor: " << tcp6Acceptor.last_error_str() << std::endl;
+                    return EXIT_RUNTIME;
+                }
+
+                sockpp::inet6_address peer;
+                tcp6Socket = tcp6Acceptor.accept(&peer);
+                std::cerr << "Incoming connection from " << peer << std::endl;
+                if (!tcp6Socket) {
+                    std::cerr << "Error on incoming connection: " << tcp6Acceptor.last_error_str() << std::endl;
+                    return EXIT_RUNTIME;
+                }
+
+                std::thread threadReadFromTCP6 = std::thread(readFromTCP6);
+                std::thread threadWriteToTCP6 = std::thread(writeToTCP6);
+
+                threadReadFromTCP6.join();
+                threadWriteToTCP6.join();
+
+                std::cout << std::endl;
+                return EXIT_SUCCESS;
+            }
+        } else {
+            std::string address = "localhost";
+            if (cliParser.getOption("bind").errorCode != ErrorCodes::NOT_PRESENT) {
+                address = cliParser.getOption("bind").value;
+            }
+            std::cerr << "Listening on " << address << " port " << (int) port << " (UDP)..." << std::endl;
+            if (ipv4) {
+                // UDP v4 in
+                if (!udpSocket) {
+                    std::cerr << "Error creating UDP socket: " << udpSocket.last_error_str() << std::endl;
+                }
+                if (!udpSocket.bind(sockpp::inet_address(address, port))) {
+                    std::cerr << "Error binding UDP socket to " << address << " port " << port << ": " << udpSocket.last_error_str() << std::endl;
+                }
+
+                std::thread threadReadFromUDP = std::thread(readFromUDP);
+                // Can't send bc we have no idea where to send to.
+                //std::thread threadWriteToUDP = std::thread(writeToUDP);
+
+                threadReadFromUDP.join();
+                //threadWriteToUDP.join();
+
+                std::cout << std::endl;
+                return EXIT_SUCCESS;
+            } else {
+                // UDP v6 in
+                if (!udp6Socket) {
+                    std::cerr << "Error creating UDP socket: " << udp6Socket.last_error_str() << std::endl;
+                }
+                if (!udp6Socket.bind(sockpp::inet6_address(address, port))) {
+                    std::cerr << "Error binding UDP socket to " << address << " port " << port << ": " << udp6Socket.last_error_str() << std::endl;
+                }
+
+                std::thread threadReadFromUDP6 = std::thread(readFromUDP6);
+                // Can't send bc we have no idea where to send to.
+                //std::thread threadWriteToUDP6 = std::thread(writeToUDP6);
+
+                threadReadFromUDP6.join();
+                //threadWriteToUDP6.join();
+
+                std::cout << std::endl;
+                return EXIT_SUCCESS;
+            }
+        }
+    }
 }