mirror of
https://github.com/MariaDB/server.git
synced 2025-10-31 10:56:12 +01:00
144 lines
4.1 KiB
C
144 lines
4.1 KiB
C
#ifndef QLZ_HEADER
|
|
#define QLZ_HEADER
|
|
|
|
// Fast data compression library
|
|
// Copyright (C) 2006-2011 Lasse Mikkel Reinhold
|
|
// lar@quicklz.com
|
|
//
|
|
// QuickLZ can be used for free under the GPL 1, 2 or 3 license (where anything
|
|
// released into public must be open source) or under a commercial license if such
|
|
// has been acquired (see http://www.quicklz.com/order.html). The commercial license
|
|
// does not cover derived or ported versions created by third parties under GPL.
|
|
|
|
// You can edit following user settings. Data must be decompressed with the same
|
|
// setting of QLZ_COMPRESSION_LEVEL and QLZ_STREAMING_BUFFER as it was compressed
|
|
// (see manual). If QLZ_STREAMING_BUFFER > 0, scratch buffers must be initially
|
|
// zeroed out (see manual). First #ifndef makes it possible to define settings from
|
|
// the outside like the compiler command line.
|
|
|
|
// 1.5.0 final
|
|
|
|
#ifndef QLZ_COMPRESSION_LEVEL
|
|
#define QLZ_COMPRESSION_LEVEL 1
|
|
//#define QLZ_COMPRESSION_LEVEL 2
|
|
//#define QLZ_COMPRESSION_LEVEL 3
|
|
|
|
#define QLZ_STREAMING_BUFFER 0
|
|
//#define QLZ_STREAMING_BUFFER 100000
|
|
//#define QLZ_STREAMING_BUFFER 1000000
|
|
|
|
//#define QLZ_MEMORY_SAFE
|
|
#endif
|
|
|
|
#define QLZ_VERSION_MAJOR 1
|
|
#define QLZ_VERSION_MINOR 5
|
|
#define QLZ_VERSION_REVISION 0
|
|
|
|
// Using size_t, memset() and memcpy()
|
|
#include <string.h>
|
|
|
|
// Verify compression level
|
|
#if QLZ_COMPRESSION_LEVEL != 1 && QLZ_COMPRESSION_LEVEL != 2 && QLZ_COMPRESSION_LEVEL != 3
|
|
#error QLZ_COMPRESSION_LEVEL must be 1, 2 or 3
|
|
#endif
|
|
|
|
typedef unsigned int ui32;
|
|
typedef unsigned short int ui16;
|
|
|
|
// Decrease QLZ_POINTERS for level 3 to increase compression speed. Do not touch any other values!
|
|
#if QLZ_COMPRESSION_LEVEL == 1
|
|
#define QLZ_POINTERS 1
|
|
#define QLZ_HASH_VALUES 4096
|
|
#elif QLZ_COMPRESSION_LEVEL == 2
|
|
#define QLZ_POINTERS 4
|
|
#define QLZ_HASH_VALUES 2048
|
|
#elif QLZ_COMPRESSION_LEVEL == 3
|
|
#define QLZ_POINTERS 16
|
|
#define QLZ_HASH_VALUES 4096
|
|
#endif
|
|
|
|
// Detect if pointer size is 64-bit. It's not fatal if some 64-bit target is not detected because this is only for adding an optional 64-bit optimization.
|
|
#if defined _LP64 || defined __LP64__ || defined __64BIT__ || _ADDR64 || defined _WIN64 || defined __arch64__ || __WORDSIZE == 64 || (defined __sparc && defined __sparcv9) || defined __x86_64 || defined __amd64 || defined __x86_64__ || defined _M_X64 || defined _M_IA64 || defined __ia64 || defined __IA64__
|
|
#define QLZ_PTR_64
|
|
#endif
|
|
|
|
// hash entry
|
|
typedef struct
|
|
{
|
|
#if QLZ_COMPRESSION_LEVEL == 1
|
|
ui32 cache;
|
|
#if defined QLZ_PTR_64 && QLZ_STREAMING_BUFFER == 0
|
|
unsigned int offset;
|
|
#else
|
|
const unsigned char *offset;
|
|
#endif
|
|
#else
|
|
const unsigned char *offset[QLZ_POINTERS];
|
|
#endif
|
|
|
|
} qlz_hash_compress;
|
|
|
|
typedef struct
|
|
{
|
|
#if QLZ_COMPRESSION_LEVEL == 1
|
|
const unsigned char *offset;
|
|
#else
|
|
const unsigned char *offset[QLZ_POINTERS];
|
|
#endif
|
|
} qlz_hash_decompress;
|
|
|
|
|
|
// states
|
|
typedef struct
|
|
{
|
|
#if QLZ_STREAMING_BUFFER > 0
|
|
unsigned char stream_buffer[QLZ_STREAMING_BUFFER];
|
|
#endif
|
|
size_t stream_counter;
|
|
qlz_hash_compress hash[QLZ_HASH_VALUES];
|
|
unsigned char hash_counter[QLZ_HASH_VALUES];
|
|
} qlz_state_compress;
|
|
|
|
|
|
#if QLZ_COMPRESSION_LEVEL == 1 || QLZ_COMPRESSION_LEVEL == 2
|
|
typedef struct
|
|
{
|
|
#if QLZ_STREAMING_BUFFER > 0
|
|
unsigned char stream_buffer[QLZ_STREAMING_BUFFER];
|
|
#endif
|
|
qlz_hash_decompress hash[QLZ_HASH_VALUES];
|
|
unsigned char hash_counter[QLZ_HASH_VALUES];
|
|
size_t stream_counter;
|
|
} qlz_state_decompress;
|
|
#elif QLZ_COMPRESSION_LEVEL == 3
|
|
typedef struct
|
|
{
|
|
#if QLZ_STREAMING_BUFFER > 0
|
|
unsigned char stream_buffer[QLZ_STREAMING_BUFFER];
|
|
#endif
|
|
#if QLZ_COMPRESSION_LEVEL <= 2
|
|
qlz_hash_decompress hash[QLZ_HASH_VALUES];
|
|
#endif
|
|
size_t stream_counter;
|
|
} qlz_state_decompress;
|
|
#endif
|
|
|
|
|
|
#if defined (__cplusplus)
|
|
extern "C" {
|
|
#endif
|
|
|
|
// Public functions of QuickLZ
|
|
size_t qlz_size_decompressed(const char *source);
|
|
size_t qlz_size_compressed(const char *source);
|
|
size_t qlz_compress(const void *source, char *destination, size_t size, qlz_state_compress *state);
|
|
size_t qlz_decompress(const char *source, void *destination, qlz_state_decompress *state);
|
|
int qlz_get_setting(int setting);
|
|
size_t qlz_size_header(const char *source);
|
|
|
|
#if defined (__cplusplus)
|
|
}
|
|
#endif
|
|
|
|
#endif
|
|
|