Back to index

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

Go to the source code of this file.

Functions

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)

Function Documentation

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

Definition at line 61 of file compress.c.

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

Here is the call graph for this function:

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

Definition at line 21 of file 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;
}

Here is the call graph for this function: