uncompr.cc File Reference

#include "zlib.h"

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Macros
#define	ZLIB_INTERNAL

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

Macro Definition Documentation

#define ZLIB_INTERNAL

Definition at line 8 of file uncompr.cc.

Function Documentation

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

Definition at line 24 of file uncompr.cc.

{
    z_stream stream;
    int err;

    stream.next_in = (z_const Bytef*)source;
    stream.avail_in = (uInt)sourceLen;
    /* Check for source > 64K on 16-bit machine: */
    if ((uLong)stream.avail_in != sourceLen) return Z_BUF_ERROR;

    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;

    err = inflateInit(&stream);
    if (err != Z_OK) return err;

    err = inflate(&stream, Z_FINISH);
    if (err != Z_STREAM_END) {
        inflateEnd(&stream);
        if (err == Z_NEED_DICT || (err == Z_BUF_ERROR && stream.avail_in == 0))
            return Z_DATA_ERROR;
        return err;
    }
    *destLen = stream.total_out;

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

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