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plt-scheme  4.2.1
uncompr.c File Reference
#include "zlib.h"

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

Function Documentation

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

Definition at line 25 of file uncompr.c.

    z_stream stream;
    int err;

    stream.next_in = (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) {
        return err == Z_OK ? Z_BUF_ERROR : err;
    *destLen = stream.total_out;

    err = inflateEnd(&stream);
    return err;

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