chunk.h
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#ifndef _CHUNK_H
#define _CHUNK_H
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <errno.h>
#include <fcntl.h>
#include <stdint.h>
#include <string.h>
#include <byteswap.h>
#include <math.h>
#include "compression.h"
#define BLOCKS_PER_CHUNK 16
#define CHUNKS_PER_REGION 32
#define CHUNK_OFFSET_LENGTH 32
#define CHUNK_SECTOR_SIZE 4096
// 58593 is the maximum number of regions containing 32 chunks in any direction
// Thus, biggest filename is:
// r.-58593.-58593.mca
#define MAX_REGION_FILENAME_LENGTH 32 // Just to round up
enum COMPRESSION_TYPE {
COMPRESSION_TYPE_GZIP = 1,
COMPRESSION_TYPE_ZLIB = 2
};
typedef struct RegionID {
int x;
int z;
} RegionID;
typedef struct ChunkID {
int x;
int z;
} ChunkID;
typedef struct __attribute__((packed)) ChunkHeader {
uint32_t length;
uint8_t compressionType;
} ChunkHeader;
ChunkID translateCoordsToChunk(double x, double y, double z);
int overwriteChunk(const char* regionFolder, ChunkID chunk, void* chunkData, size_t chunkLength);
ssize_t loadChunk(const char* regionFolder, ChunkID chunk, void** chunkData);
#endif