compress.c-Dateireferenz

#include "zlib.h"

Include-Abhängigkeitsdiagramm für compress.c:

gehe zum Quellcode dieser Datei

Makrodefinitionen
#define	ZLIB_INTERNAL

Funktionen
int ZEXPORT	compress2 (Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen, int level)
int ZEXPORT	compress (Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen)
uLong ZEXPORT	compressBound (uLong sourceLen)

Makro-Dokumentation

#define ZLIB_INTERNAL

Definiert in Zeile 8 der Datei compress.c.

Dokumentation der Funktionen

int ZEXPORT compress	(	Bytef *	dest,
		uLongf *	destLen,
		const Bytef *	source,
		uLong	sourceLen
	)

Definiert in Zeile 62 der Datei compress.c.

{
    return compress2(dest, destLen, source, sourceLen, Z_DEFAULT_COMPRESSION);
}

int ZEXPORT compress2	(	Bytef *	dest,
		uLongf *	destLen,
		const Bytef *	source,
		uLong	sourceLen,
		int	level
	)

Definiert in Zeile 22 der Datei compress.c.

{
    z_stream stream;
    int err;

    stream.next_in = (Bytef*)source;
    stream.avail_in = (uInt)sourceLen;
#ifdef MAXSEG_64K
    /* Check for source > 64K on 16-bit machine: */
    if ((uLong)stream.avail_in != sourceLen) return Z_BUF_ERROR;
#endif
    stream.next_out = dest;
    stream.avail_out = (uInt)*destLen;
    if ((uLong)stream.avail_out != *destLen) return Z_BUF_ERROR;

    stream.zalloc = (alloc_func)0;
    stream.zfree = (free_func)0;
    stream.opaque = (voidpf)0;

    err = deflateInit(&stream, level);
    if (err != Z_OK) return err;

    err = deflate(&stream, Z_FINISH);
    if (err != Z_STREAM_END) {
        deflateEnd(&stream);
        return err == Z_OK ? Z_BUF_ERROR : err;
    }
    *destLen = stream.total_out;

    err = deflateEnd(&stream);
    return err;
}

uLong ZEXPORT compressBound

(

uLong

sourceLen)

Definiert in Zeile 75 der Datei compress.c.

{
    return sourceLen + (sourceLen >> 12) + (sourceLen >> 14) + 11;
}