Файл zlibmem.c

#include "allheaders.h"
#include "zlib.h"

Макросы
#define	DEBUG   0

Функции
l_uint8 *	zlibCompress (l_uint8 *datain, size_t nin, size_t *pnout)
l_uint8 *	zlibUncompress (l_uint8 *datain, size_t nin, size_t *pnout)

Переменные
static const l_int32	L_BUF_SIZE = 32768
static const l_int32	ZLIB_COMPRESSION_LEVEL = 6

Макросы

DEBUG

#define DEBUG   0

Функции

zlibCompress()

l_uint8* zlibCompress	(	l_uint8 *	datain,
		size_t	nin,
		size_t *	pnout
	)

zlibCompress()

Input:  datain (byte buffer with input data)
        nin    (number of bytes of input data)
        &nout  (<return> number of bytes of output data)
Return: dataout (compressed data), or null on error

Notes: (1) We repeatedly read in and fill up an input buffer, compress the data, and read it back out. zlib uses two byte buffers internally in the z_stream data structure. We use the bbuffers to feed data into the fixed bufferin, and feed it out of bufferout, in the same way that a pair of streams would normally be used if the data were being read from one file and written to another. This is done iteratively, compressing L_BUF_SIZE bytes of input data at a time.

zlibUncompress()

l_uint8* zlibUncompress	(	l_uint8 *	datain,
		size_t	nin,
		size_t *	pnout
	)

zlibUncompress()

Input:  datain (byte buffer with compressed input data)
        nin    (number of bytes of input data)
        &nout  (<return> number of bytes of output data)
Return: dataout (uncompressed data), or null on error

Notes: (1) See zlibCompress().

Переменные

L_BUF_SIZE

const l_int32 L_BUF_SIZE = 32768

static

ZLIB_COMPRESSION_LEVEL

const l_int32 ZLIB_COMPRESSION_LEVEL = 6

static