resources/region_files: add a zlib compressed chunk

I did this months ago with the intention to finally start implementing networking....
Yeah, that definitely panned out.

Also, Git is drunk with how it says files have been renamed, they’re just empty apart from the license notice.

.gitignore

@@ -24,6 +24,9 @@
 # ignore nano's temp files
 *.swp
 
+# Ignore sublime text project files.
+*.sublime-*
+
 #vscode
 .vscode
 

code_style.md

@@ -22,10 +22,8 @@ each file.
 Don't use excessive comments, use descriptive names instead.
 There is no such thing as too long names (within reason, of course).
 
-Don't have comments that go beyond 80 characters per line, preferably
-slightly less.
-
 Put comments on their own lines.
+Format comments to improve readability, don't have long single-line comments.
 
 Indent by four spaces.
 

resources/README.md

@@ -59,3 +59,9 @@ Usage: `check_endianness > header_file`
 Note that, while this tool should in theory be able to detect
 PDP and Honeywell-316-style endianness, the FOSS-VG project itself
 does not support these.
+
+## region_files
+
+Exactly what the name says. At this point just a random region file I grabbed
+from Minecraft, will probably contain synthetic files for test cases in the
+future as well.

resources/region_files/first_chunk.sh

@@ -5,9 +5,18 @@ else
     VERBOSE=false
 fi
 
+if [ "$1" = "-n" ]; then
+    DECOMPRESS=false
+    shift
+else
+    DECOMPRESS=true
+fi
+
+
 if [ ! -f "$1" ]; then
-    echo "Usage: $0 [-v] FILE"
+    echo "Usage: $0 [-v] [-n] FILE"
     echo "  -v   display raw content and NBT dump"
+    echo "  -n   don't decompress"
     exit 1
 fi
 
@@ -62,13 +71,20 @@ sys.stdout.buffer.flush()
 esac
 echo "  format: $FORMAT ($FORMAT_HEX)"
 
+
+if $DECOMPRESS; then
+  dd if="$1" bs=4096 count=$LENGTH skip=$OFFSET 2>/dev/null | dd bs=1 skip=5 count=$(($COMPRESSED_LENGTH-1)) 2>/dev/null | UNCOMPRESS > /tmp/chunk_uncompressed_nbt
+else
+  dd if="$1" bs=4096 count=$LENGTH skip=$OFFSET 2>/dev/null | dd bs=1 skip=5 count=$(($COMPRESSED_LENGTH-1)) 2>/dev/null > /tmp/chunk_compressed_nbt
+fi
+
 if $VERBOSE; then
     echo "Raw chunk data:"
     echo "$DATA"
     echo "NBT dump:"
 
     #TODO: use pipes instead of a file
-    dd if="$1" bs=4096 count=$LENGTH skip=$OFFSET 2>/dev/null | dd bs=1 skip=5 count=$(($COMPRESSED_LENGTH-1)) 2>/dev/null | UNCOMPRESS > /tmp/chunk_uncompressed_nbt
+    #TODO: fix this up to work with both compressed and uncompressed NBT
     dumpnbt /tmp/chunk_uncompressed_nbt
     rm /tmp/chunk_uncompressed_nbt
 fi

scripts/build.sh

@@ -62,6 +62,7 @@ COMPILE_COMMANDS=(
     "$CXX_WITH_FLAGS src/tools/dumpnbt.cpp -I./include -Lbin/lib -l:nbt.so -l:cli.so -o bin/tools/dumpnbt"
     "$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 src/tools/zlibutil.cpp -I./include -Lbin/lib -l:cli.so -l:libz.so -l:file.so -o bin/tools/zlibutil"
     "$CXX_WITH_FLAGS -pthread src/tools/hexnet.cpp -I./include -Lbin/lib -l:cli.so -l:libsockpp.so -o bin/tools/hexnet"
     "$CXX_WITH_FLAGS -DFOSSVG_DEBUG src/fossvg.cpp -I./include -Lbin/lib -l:file.so -l:cli.so -lglfw -lvulkan -o bin/fossvg"
     "$CXX_WITH_FLAGS src/fossvgd.cpp -I./include -Lbin/lib -l:cli.so -o bin/fossvgd"

scripts/clean.sh

@@ -39,6 +39,7 @@ fi
 
 ln -vs ../dependencies/sockpp-0.8.1/include/sockpp/ ./include/
 ln -vs ../dependencies/tiny-utf8-4.4.3/include/tinyutf8/ ./include/
+ln -vs ../dependencies/zlib-1.3.1/ ./include/zlib
 
 create_file ./bin/.placeholder
 create_file ./include/.placeholder

scripts/clean_dependencies.sh

@@ -17,6 +17,7 @@
 
 source scripts/lib.sh
 
+#TODO: move this to download.sh
 echo ">>> Checking download cache for unneeded or corrupted files..."
 for file in $(ls .download_cache); do
     #TODO: remove if unknown shasum

scripts/download.sh

@@ -0,0 +1,61 @@
+if [ "$#" -lt 3 -o "$#" -gt 3 ]; then
+    echo "Usage: $0 URL DESTINATION SHA256SUM"
+    exit 1
+fi
+
+source scripts/lib.sh
+
+URL="$1"
+DESTINATION="$2"
+SHA256SUM="$3"
+
+if command -v wget >/dev/null 2>&1; then
+    USE_WGET=yes
+else
+    if command -v curl >/dev/null 2>&1; then
+        USE_WGET=no
+    else
+        echo "Found neither wget nor curl. Aborting."
+        exit 1
+    fi
+fi
+
+if [ ! -d .download_cache ]; then
+    echo "Cache directory missing."
+    create_directory .download_cache
+fi
+
+#TODO: keep track of which cached file is downloaded to which destination
+#TODO: when downloading a file with a new hash to the same destination, mark the old one as no longer in use
+#TODO: if there is an even older one for the same download path, delete it
+#TODO: remove cache maintenance from clean_dependencies
+
+if [ -f ".download_cache/$SHA256SUM" ]; then
+    if check_sha256 ".download_cache/$SHA256SUM" "$SHA256SUM"; then
+        echo "Using locally cached file for $DESTINATION"
+        cp ".download_cache/$SHA256SUM" "$DESTINATION"
+        exit 0
+    else
+        echo "Locally cached file for $DESTINATION is corrupted."
+        rm ".download_cache/$SHA256SUM"
+        $0 "$URL" "$DESTINATION" "$SHA256SUM"
+        exit $?
+    fi
+else
+    echo -n "Downloading $URL to $DESTINATION... "
+    if [ $USE_WGET = yes ]; then
+        wget -O ".download_cache/$SHA256SUM" "$URL" >/dev/null 2>&1
+    else
+        curl -L "$URL" --output ".download_cache/$SHA256SUM" >/dev/null 2>&1
+    fi
+    if check_sha256 ".download_cache/$SHA256SUM" "$SHA256SUM"; then
+        cp ".download_cache/$SHA256SUM" "$DESTINATION"
+        echo "done."
+        exit 0
+    else
+        echo "error."
+        echo "Checksum verification failed. Your download is either corrupted or the file has been altered. Removing file."
+        rm ".download_cache/$SHA256SUM"
+        exit 1
+    fi
+fi

scripts/lib.sh

@@ -59,16 +59,16 @@ fi
 function remove {
     local USE_FORCE=""
     if [ "$1" = "-f" ]; then
-      USE_FORCE="-f"
+      USE_FORCE="f"
+      shift
       echo "Forcefully removing $1..."
     else
       echo "Removing $1..."
     fi;
-    shift
     if [ -d "$1" ]; then
-        rm "$USE_FORCE" -rv "$1"
+        rm -"$USE_FORCE"rv "$1"
     else
-        rm "$USE_FORCE" -v "$1"
+        rm -"$USE_FORCE"v "$1"
     fi
 }
 

scripts/setup_project.sh

@@ -17,73 +17,19 @@
 
 source scripts/lib.sh
 
-echo -n "Wget or curl? "
-if command -v wget >/dev/null 2>&1; then
-    USE_WGET=yes
-    echo "wget"
-else
-    if command -v curl >/dev/null 2>&1; then
-        USE_WGET=no
-        echo "curl"
-    else
-        echo "Found neither wget nor curl. Aborting."
-        exit 1
-    fi
-fi
-
-function download {
-    URL="$1"
-    DESTINATION="$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 [ $USE_WGET = yes ]; then
-            wget -O ".download_cache/$SHA256SUM" "$URL" >/dev/null 2>&1
-        else
-            curl -L "$URL" --output ".download_cache/$SHA256SUM" >/dev/null 2>&1
-        fi
-        if check_sha256 ".download_cache/$SHA256SUM" "$SHA256SUM"; then
-            cp ".download_cache/$SHA256SUM" "$DESTINATION"
-            echo "done."
-            return 0
-        else
-            echo "error."
-            echo "Checksum verification failed. Your download is either corrupted or the file has been altered. Removing file."
-            rm ".download_cache/$SHA256SUM"
-            return 1
-        fi
-    fi
-}
-
 scripts/clean.sh
 scripts/clean_dependencies.sh
 
 set -e # failures are not acceptable here
 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/v0.8.1.tar.gz dependencies/tmp/sockpp.tar.gz a8aedff8bd8c1da530b91be650352008fddabc9f1df0d19701d76cbc359c8651
+scripts/download.sh https://github.com/DuffsDevice/tiny-utf8/archive/refs/tags/v4.4.3.tar.gz dependencies/tmp/tiny-utf8.tar.gz 8e3f61651909c9f3105d3501932a96aa65733127fb6e7cf94cb1b0a2dff42c8f
+scripts/download.sh https://github.com/fpagliughi/sockpp/archive/refs/tags/v0.8.1.tar.gz dependencies/tmp/sockpp.tar.gz a8aedff8bd8c1da530b91be650352008fddabc9f1df0d19701d76cbc359c8651
+scripts/download.sh https://www.zlib.net/zlib-1.3.1.tar.xz dependencies/tmp/zlib.tar.xz 38ef96b8dfe510d42707d9c781877914792541133e1870841463bfa73f883e32
 
 #TODO: figure out how to cache shaderc
 #also TODO: target a specific commit
 git clone --branch known-good https://github.com/google/shaderc.git dependencies/tmp/shaderc
-#download https://github.com/google/shaderc/archive/refs/tags/v2023.7.tar.gz dependencies/tmp/shaderc.tar.gz 681e1340726a0bf46bea7e31f10cbfe78e01e4446a35d90fedc2b78d400fcdeb
+#scripts/download.sh https://github.com/google/shaderc/archive/refs/tags/v2023.7.tar.gz dependencies/tmp/shaderc.tar.gz 681e1340726a0bf46bea7e31f10cbfe78e01e4446a35d90fedc2b78d400fcdeb
 
 echo -n ">>> Extracting tiny-utf8... "
 gzip -d dependencies/tmp/tiny-utf8.tar.gz
@@ -95,6 +41,11 @@ gzip -d dependencies/tmp/sockpp.tar.gz
 tar -xf dependencies/tmp/sockpp.tar -C dependencies
 echo "done"
 
+echo -n ">>> Extracting zlib... "
+xz -d dependencies/tmp/zlib.tar.xz
+tar -xf dependencies/tmp/zlib.tar -C dependencies
+echo "done"
+
 echo ">>> Building sockpp..."
 pushd dependencies/sockpp-0.8.1/ >/dev/null 2>&1
 if uname -s | tr [:upper:] [:lower:] | grep cygwin >/dev/null; then
@@ -138,5 +89,12 @@ mkdir -vp dependencies/shaderc/bin
 cp -v "dependencies/tmp/shaderc/$SHADERC_BUILD/glslc/glslc" dependencies/shaderc/bin
 echo ">>> done"
 
+echo ">>> Building zlib..."
+pushd dependencies/zlib-1.3.1/
+./configure
+make
+popd
+echo "done"
+
 echo ">>> Cleaning up..."
 remove -f dependencies/tmp

scripts/test/hexnet.sh

@@ -1,23 +0,0 @@
-#!/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

src/lib/net/connection.hpp

@@ -0,0 +1,42 @@
+// 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
+
+#pragma once
+
+#include <string>
+
+#include "../error.hpp"
+
+namespace network {
+    struct Connection {
+    }
+
+    // host could be a hostname or address
+    ErrorOr<Connection> connect(std::string host);
+    void disconnect(Connection);
+
+    // start listening for incoming connections
+    ErrorOrVoid startListening();
+    // stop listening for new incoming connections but keep existing
+    // connections open
+    void stopListening();
+    // stop listening for incoming connections and disconnect all
+    void stopCommunication();
+
+    ErrorOr<Connection> acceptNextIncoming();
+}

src/lib/net/tcp_server.h

@@ -0,0 +1,16 @@
+// Copyright 2022, FOSS-VG Developers and Contributers
+//
+// Author(s):
+//
+// 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

src/tools/zlibutil.cpp

@@ -0,0 +1,206 @@
+// Copyright 2022, FOSS-VG Developers and Contributers
+//
+// Author(s):
+//  Jocadbz
+//
+// 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 <tinyutf8/tinyutf8.h>
+#include <zlib/zlib.h>
+#include <cstring>
+
+#include "../lib/cli.hpp"
+#include "../lib/file.hpp"
+
+#define EXIT_SUCCESS 0
+#define EXIT_RUNTIME 1
+#define EXIT_USAGE   2
+
+#include <iostream>
+#include <fstream>
+#include <vector>
+#include <zlib.h>
+
+#define CHUNK_SIZE 16384 // Chunk size
+
+
+std::vector<char> compressData(const char* data, int size) {
+    z_stream zs;
+    memset(&zs, 0, sizeof(zs));
+
+    if (deflateInit(&zs, Z_DEFAULT_COMPRESSION) != Z_OK)
+        throw(std::runtime_error("deflateInit failed while compressing."));
+
+    zs.next_in = reinterpret_cast<Bytef*>(const_cast<char*>(data));
+    zs.avail_in = size;
+
+    int ret;
+    char outbuffer[CHUNK_SIZE];
+    std::vector<char> compressedData;
+
+    do {
+        zs.next_out = reinterpret_cast<Bytef*>(outbuffer);
+        zs.avail_out = CHUNK_SIZE;
+
+        ret = deflate(&zs, Z_FINISH);
+
+        if (compressedData.size() < zs.total_out)
+            compressedData.insert(compressedData.end(), outbuffer, outbuffer + CHUNK_SIZE - zs.avail_out);
+    } while (ret == Z_OK);
+
+    deflateEnd(&zs);
+
+    if (ret != Z_STREAM_END)
+        throw(std::runtime_error("Error while compressing: " + std::to_string(ret)));
+
+    return compressedData;
+}
+
+
+std::vector<char> decompressData(const char* data, int size) {
+    z_stream zs;
+    memset(&zs, 0, sizeof(zs));
+
+    if (inflateInit(&zs) != Z_OK)
+        throw(std::runtime_error("inflateInit failed while decompressing."));
+
+    zs.next_in = reinterpret_cast<Bytef*>(const_cast<char*>(data));
+    zs.avail_in = size;
+
+    int ret;
+    char outbuffer[CHUNK_SIZE];
+    std::vector<char> decompressedData;
+
+    do {
+        zs.next_out = reinterpret_cast<Bytef*>(outbuffer);
+        zs.avail_out = CHUNK_SIZE;
+
+        ret = inflate(&zs, 0);
+
+        if (decompressedData.size() < zs.total_out)
+            decompressedData.insert(decompressedData.end(), outbuffer, outbuffer + CHUNK_SIZE - zs.avail_out);
+    } while (ret == Z_OK);
+
+    inflateEnd(&zs);
+
+    if (ret != Z_STREAM_END)
+        throw(std::runtime_error("Error while decompressing: " + std::to_string(ret)));
+
+    return decompressedData;
+}
+
+/*
+Finnaly, the main file
+⠀⠀⠀⠀⠀⠀⠀⢠⣤⣄⣀⣠⣤⣶⣿⣯⣿⣽⣾⣷⣶⣶⡦⣄⣀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
+⠀⠀⠀⠀⠀⠀⠀⢀⣿⣟⣯⣽⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣾⣟⣦⣄⠀⠀⠀⠀⠀⠀⠀
+⠀⠀⠀⠀⠀⣠⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣾⣿⣿⣿⣿⣿⣿⣾⡷⣄⠀⠀⠀⠀⠀
+⠀⠀⠀⢀⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣾⣿⣿⣾⣿⣿⣿⣷⣿⣿⣿⣿⣿⣿⣳⡀⠀⠀⠀
+⠀⠀⢠⣿⣿⣽⣿⢿⣿⣿⣿⣿⡿⣿⣿⣿⣿⢿⡿⣽⣿⣿⡿⣿⣿⣏⣿⣿⣿⣟⣿⣳⡄⠀⠀
+⠀⠀⣾⣿⣿⣽⣾⣿⣿⣿⣿⢿⣿⣿⣿⣿⣿⣿⢿⣿⣾⢿⣷⡿⣿⣿⣷⢿⣿⣿⣷⡿⣷⠀⠀
+⠀⢸⣿⣿⣿⣿⣟⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣳⣿⣟⣿⣿⣿⣻⣽⣿⣿⡽⡇⠀
+⠀⡿⣿⣿⣿⣿⣾⣿⣿⣿⣿⢿⣿⣿⣿⣽⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣽⡀
+⢸⣿⣿⣿⣿⣿⣿⣿⣏⠀⠈⠀⣿⣿⣿⣿⣿⣿⣟⣿⣿⣿⣿⣿⣿⣿⡿⣿⣿⣿⣿⣿⣿⢿⡇
+⢨⣿⣿⣿⣿⣽⣿⣿⣇⣀⡤⠤⣟⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣟⣿⣿⣿⣿⠎⠀
+⢰⣿⡿⣿⣿⣿⣿⣿⠃⠀⠀⠐⠃⠘⠙⢹⠿⡘⣿⠟⠉⢹⡂⠿⡞⣿⣿⣿⣿⣿⣿⣿⣿⠂⠀
+⠀⣿⣿⣿⣿⣿⣿⡞⠅⣀⣀⣀⣀⠉⠓⠚⠀⠁⡏⠀⢛⠋⢀⣀⣀⣋⠸⣿⣿⣿⣿⣿⣿⠃⠀
+⠀⣷⣟⣿⣿⣿⣿⣆⠠⡟⣿⣿⣿⡿⠦⠀⠀⠀⠀⠀⠠⢿⣿⣿⣿⠻⢇⣿⣿⣿⣿⣿⣿⠀⠀
+⠀⠈⢸⣻⣿⣿⣿⢯⡃⢀⠹⣿⡿⠗⠀⠀⠀⠀⠀⠀⠀⠘⢿⣿⠏⣈⠈⣿⣿⣿⣿⣿⣿⠀⠀
+⠀⠀⠈⣿⣿⣿⣿⣇⡗⠈⠉⠉⠉⠉⠀⠀⢐⡀⠀⠀⠀⠈⠉⠉⠉⠑⢸⣸⣿⡟⣿⣿⡟⠀⠀
+⠀⠀⠀⢻⣿⣽⣿⡏⢿⡆⠀⠀⠀⠀⠀⠀⠸⢆⡄⠀⠀⠀⠀⠀⠀⢠⣿⣿⣿⣿⣿⡿⠇⠀⠀
+⠀⠀⠀⠈⠿⣿⢿⡇⠀⠙⢦⡀⠀⠀⠀⠐⠲⠤⠔⠂⠀⠀⠀⢀⣴⣾⣿⣿⣿⣿⣿⡟⠀⠀⠀
+⠀⠀⠀⠀⠀⠘⣿⣇⠀⠀⠀⠙⠢⣄⡀⠀⠀⠀⠀⣀⣐⣺⣵⣿⣿⣿⣿⣿⣿⣿⣿⠇⠀⠀⠀
+⠀⠀⠀⠀⠀⠀⠙⠋⠀⠀⠀⠀⠀⢹⢨⠑⠲⠤⠞⠋⠉⣿⣿⣿⣿⣿⣿⣿⣿⡿⠁⠀⠀⠀⠀
+⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⡼⠈⠀⠀⠀⠀⠀⠀⢿⣿⣿⣿⣿⣿⣿⣿⡇⠀⠀⠀⠀⠀
+⠀⠀⠀⠀⠀⠀⢀⣀⣠⢤⡠⠒⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠉⠛⠿⣿⣿⣿⣿⣇⠀⠀⠀⠀⠀
+⠀⠀⣠⠔⠒⠉⠁⠀⠀⠘⠶⣲⠄⠀⠀⠈⠀⠀⠀⢠⢀⠀⠀⣀⠤⢻⣿⣿⣿⡏⠐⠲⣄⠀⠀
+⠀⢰⠇⠀⠀⠀⠀⠀⠀⠀⠀⠀⠓⠒⠚⢕⡀⠀⠀⣠⠖⠒⠚⠁⠀⢾⣿⣿⣿⡁⠀⠀⠨⡆⠀
+⠀⢸⠀⠀⠀⠒⠒⠒⠒⠒⠂⠀⠐⠚⠑⠆⠀⠀⠒⠓⠀⠀⠀⠀⠀⣿⣿⣿⣿⡆⠀⠀⠀⣇⠀
+⠀⠈⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠁⠀
+*/
+
+int main(int argc, char* argv[]) {
+    std::vector<CLI::Flag> flags;
+    flags.push_back(CLI::Flag('c', "compress",        "compress a file"));
+    flags.push_back(CLI::Flag('d', "decompress",         "descompress a file"));
+    std::vector<CLI::Option> options;
+    std::vector<CLI::Argument> arguments;
+    arguments.push_back(CLI::Argument("FILE", "path of the file to compress/decompress"));
+    CLI::ArgumentsParser cliParser = CLI::ArgumentsParser(argc, argv, flags, options, arguments, "Compress or decompress files using zlib");
+
+    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"
+            << "ZlibUtil 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;
+    File *writeFile;
+
+    if (cliParser.getFlag("compress").value) {
+        std::vector<uint8_t> bytes = file->read(file->size.value).value; // this is what you get from lib/file IIRC
+        std::vector<char> differentBytes = std::vector<char>(bytes.begin(), bytes.end());
+
+        std::vector<char> compressed = compressData(differentBytes.data(), file->size.value);
+        std::vector<unsigned char> unsigneddata = std::vector<unsigned char>(compressed.begin(), compressed.end());
+        writeFile = File::open(cliParser.getArgument(0).value + ".compressed", 'w').value;
+        writeFile->write(unsigneddata);
+        writeFile->close();
+   	} else if (cliParser.getFlag("decompress").value) {
+        std::vector<uint8_t> bytes = file->read(file->size.value).value; // this is what you get from lib/file IIRC
+        std::vector<char> differentBytes = std::vector<char>(bytes.begin(), bytes.end());
+
+        std::vector<char> compressed = decompressData(differentBytes.data(), file->size.value);
+        std::vector<unsigned char> unsigneddata = std::vector<unsigned char>(compressed.begin(), compressed.end());
+
+        writeFile = File::open(cliParser.getArgument(0).value + ".uncompressed", 'w').value;
+        writeFile->write(unsigneddata);
+        writeFile->close();
+   	}
+}