lib/zlibutil, tools/zlibutil: moving things around

This includes the following changes:
- Move the data type wrangling into the lib to make it easier to use
- Put the functions into their own `zlib` namespace
- Use ErrorOr instead of exceptions
- Error codes for compression/decompression

scripts/setup_project.sh

@@ -70,24 +70,24 @@ fi
 popd >/dev/null 2>&1
 echo ">>> done"
 
-#echo ">>> Dealing with shaderc shenanigans..."
-#pushd dependencies/tmp/shaderc
-#echo "Getting sources using the provided script..."
-#./update_shaderc_sources.py
-#SHADERC_BUILD="build-$(dd if=/dev/urandom bs=1 count=5 2>/dev/null | base32)"
-#echo "Creating and entering directory $SHADERC_BUILD."
-#mkdir "$SHADERC_BUILD"
-#cd "$SHADERC_BUILD"
-#echo "Running CMake..."
-#CXXFLAGS="-Wno-error" cmake -GNinja -DCMAKE_BUILD_TYPE=Release ../src/
-#echo "Running Ninja..."
-#ninja
-#popd >/dev/null 2>&1
+echo ">>> Dealing with shaderc shenanigans..."
+pushd dependencies/tmp/shaderc
+echo "Getting sources using the provided script..."
+./update_shaderc_sources.py
+SHADERC_BUILD="build-$(dd if=/dev/urandom bs=1 count=5 2>/dev/null | base32)"
+echo "Creating and entering directory $SHADERC_BUILD."
+mkdir "$SHADERC_BUILD"
+cd "$SHADERC_BUILD"
+echo "Running CMake..."
+CXXFLAGS="-Wno-error" cmake -GNinja -DCMAKE_BUILD_TYPE=Release ../src/
+echo "Running Ninja..."
+ninja
+popd >/dev/null 2>&1
 #if needed copy more relevant files to dependencies/shaderc
-#echo "Copying binary to dependencies/shaderc/bin..."
-#mkdir -vp dependencies/shaderc/bin
-#cp -v "dependencies/tmp/shaderc/$SHADERC_BUILD/glslc/glslc" dependencies/shaderc/bin
-#echo ">>> done"
+echo "Copying binary to dependencies/shaderc/bin..."
+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/

src/tools/chunkmanipulator.cpp

@@ -1,131 +0,0 @@
-/*
-Copyright 2024, 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 <iostream>
-#include <fstream>
-#include <vector>
-#include <cstdint>
-#include <cstring>
-
-using namespace std;
-
-/*
- * Ok, before you read this, please understand.
- * This is not a elaborate program. We are not
- * using fancy parsers.
- * I'm straight up rawdogging the .mca files
- * here. Of course this should be fixed, but
- * don't get mad.
-*/
-
-// Define constants related to .mca file format
-const int SECTOR_SIZE = 4096;
-const int CHUNK_OFFSET = 4; // Offset where chunk data starts within a sector
-const int CHUNK_SIZE = 4096; // Size of a chunk data block
-const int HEADER_SIZE = 4;
-const int TIMESTAMP_SIZE = 4;
-const int NUM_CHUNKS_PER_REGION = 1024; // 32x32 chunks per region file
-
-// Function to extract chunks from a .mca file
-// Function to extract chunks from a .mca file and print position, offset, and timestamp
-void extractChunks(const string& mcaFilename) {
-    ifstream file(mcaFilename, ios::binary);
-    if (!file.is_open()) {
-        cerr << "Error opening file: " << mcaFilename << endl;
-        return;
-    }
-
-    // Calculate the number of sectors in the file
-    file.seekg(0, ios::end);
-    int fileSize = file.tellg();
-    int numSectors = fileSize / SECTOR_SIZE;
-
-    // Print header information
-    cout << "Position (x, z), Offset, Timestamp:" << endl;
-
-    // Iterate through each sector
-    for (int sector = 0; sector < numSectors; ++sector) {
-        // Read the sector header (4 bytes)
-        file.seekg(sector * SECTOR_SIZE);
-        char header[HEADER_SIZE];
-        file.read(header, HEADER_SIZE);
-
-        // Extract position (x, z) from the sector header
-        int x = sector % NUM_CHUNKS_PER_REGION;
-        int z = sector / NUM_CHUNKS_PER_REGION;
-
-        // Calculate offset and timestamp positions
-        int offset = sector * SECTOR_SIZE + HEADER_SIZE;
-        int timestampOffset = sector * SECTOR_SIZE + HEADER_SIZE + CHUNK_SIZE;
-
-        // Read the timestamp (4 bytes) from the sector
-        file.seekg(timestampOffset);
-        char timestampBytes[TIMESTAMP_SIZE];
-        file.read(timestampBytes, TIMESTAMP_SIZE);
-        int timestamp = *reinterpret_cast<int*>(timestampBytes);
-
-        // Print formatted information
-        cout << "(" << x << ", " << z << "), " << offset << ", " << timestamp << endl;
-    }
-
-    file.close();
-}
-
-
-// Function to add or replace a chunk in a .mca file
-void addReplaceChunk(const string& mcaFilename, int sectorIndex, const vector<uint8_t>& newChunkData) {
-    fstream file(mcaFilename, ios::in | ios::out | ios::binary);
-    if (!file.is_open()) {
-        cerr << "Error opening file: " << mcaFilename << endl;
-        return;
-    }
-
-    // Calculate the offset in the file where the chunk should be written
-    int fileOffset = sectorIndex * SECTOR_SIZE + CHUNK_OFFSET;
-
-    // Seek to the appropriate position in the file
-    file.seekp(fileOffset);
-
-    // Write the new chunk data
-    file.write(reinterpret_cast<const char*>(newChunkData.data()), newChunkData.size());
-
-    file.close();
-
-    cout << "Chunk added/replaced successfully at sector " << sectorIndex << endl;
-}
-
-int main() {
-    // TODO: Remember to implement CLI here.
-    string mcaFilename = "r.0.0.mca"; // Example .mca file path
-
-    // Example: Extract chunks from the .mca file
-    extractChunks(mcaFilename);
-
-    // Example: Add or replace a chunk in the .mca file
-    int sectorIndex = 0; // Example: Replace the chunk in the first sector
-    vector<uint8_t> newChunkData(CHUNK_SIZE, 0); // Example: New chunk data (all zeroes for demonstration)
-
-    addReplaceChunk(mcaFilename, sectorIndex, newChunkData);
-
-    extractChunks(mcaFilename);
-
-    return 0;
-}
-