deflate.h

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#pragma once
 
#include <stddef.h>
#include <stdint.h>
 
#include "tinyimg/tinyimg.h"
#include "tinyimg/util.h"
 
#ifdef __cplusplus
extern "C" {
#endif

#define TINY_DEFLATE_WINDOW 32768u

#define TINY_DEFLATE_FAST_BITS 9u

#define TINY_DEFLATE_MAX_READ (TINY_DEFLATE_WINDOW - 258u)

typedef struct {
    uint16_t counts[16];
    uint16_t symbols[288];
    uint16_t fast[1u << TINY_DEFLATE_FAST_BITS];
} TinyHuffman;

typedef struct {
    TinyBitReader bits;

    uint8_t* window;
    size_t head;
    size_t pending;
    size_t tail;

    TinyHuffman* literals;
    TinyHuffman* distances;

    int done;
    int inside;
    int final;
    int mode;
    size_t stored;
    int zlib;
    uint32_t adler_a;
    uint32_t adler_b;
    int error;
} TinyInflate;

int tiny_inflate_init(
    TinyInflate* state, const uint8_t* data, size_t size, int zlib
);

long tiny_inflate_read(TinyInflate* state, uint8_t* out, size_t size);

int tiny_inflate_finish(TinyInflate* state);

int tiny_inflate_all(
    const uint8_t* data, size_t size, int zlib, TinyWriter* out
);

typedef enum TinyDeflateLevel
{
    TINYIMG_DEFLATE_HUFFMAN = 0,
    TINYIMG_DEFLATE_FAST = 1,
    TINYIMG_DEFLATE_DEFAULT = 2,
    TINYIMG_DEFLATE_BEST = 3,
} TinyDeflateLevel;

int tiny_deflate(
    const uint8_t* data, size_t size, TinyDeflateLevel level, int zlib,
    TinyWriter* out
);
 
#ifdef __cplusplus
}
#endif