sl@0: /* Portions Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0:  * All rights reserved.
sl@0:  */
sl@0: 
sl@0: /* compress.cpp -- compress a memory buffer
sl@0:  * Copyright (C) 1995-2003 Jean-loup Gailly.
sl@0:  * For conditions of distribution and use, see copyright notice in zlib.h
sl@0:  */
sl@0: 
sl@0: /* @(#) $Id$ */
sl@0: 
sl@0: #define ZLIB_INTERNAL
sl@0: #include "libzcore.h"
sl@0: 
sl@0: /* ===========================================================================
sl@0:      Compresses the source buffer into the destination buffer. The level
sl@0:    parameter has the same meaning as in deflateInit.  sourceLen is the byte
sl@0:    length of the source buffer. Upon entry, destLen is the total size of the
sl@0:    destination buffer, which must be at least 0.1% larger than sourceLen plus
sl@0:    12 bytes. Upon exit, destLen is the actual size of the compressed buffer.
sl@0: 
sl@0:      compress2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
sl@0:    memory, Z_BUF_ERROR if there was not enough room in the output buffer,
sl@0:    Z_STREAM_ERROR if the level parameter is invalid.
sl@0: */
sl@0: 
sl@0: #ifdef __SYMBIAN32__
sl@0: EXPORT_C int  compress2_r (Bytef * dest, uLongf * destLen,const Bytef *  source,uLong  sourceLen,int level)
sl@0: #else
sl@0: int ZEXPORT compress2 (dest, destLen, source, sourceLen, level)
sl@0:     Bytef *dest;
sl@0:     uLongf *destLen;
sl@0:     const Bytef *source;
sl@0:     uLong sourceLen;
sl@0:     int level;
sl@0: #endif //__SYMBIAN32__
sl@0: {
sl@0:     z_stream stream;
sl@0:     int err;
sl@0: 
sl@0:     stream.next_in = (Bytef*)source;
sl@0:     stream.avail_in = (uInt)sourceLen;
sl@0: #ifdef MAXSEG_64K
sl@0:     /* Check for source > 64K on 16-bit machine: */
sl@0:     if ((uLong)stream.avail_in != sourceLen) return Z_BUF_ERROR;
sl@0: #endif
sl@0:     stream.next_out = dest;
sl@0:     stream.avail_out = (uInt)*destLen;
sl@0:     if ((uLong)stream.avail_out != *destLen) return Z_BUF_ERROR;
sl@0: 
sl@0:     stream.zalloc = (alloc_func)0;
sl@0:     stream.zfree = (free_func)0;
sl@0:     stream.opaque = (voidpf)0;
sl@0: 
sl@0:     err = deflateInit_r(&stream, level);
sl@0:     if (err != Z_OK) return err;
sl@0: 
sl@0:     err = deflate_r(&stream, Z_FINISH);
sl@0:     if (err != Z_STREAM_END) {
sl@0:         deflateEnd_r(&stream);
sl@0:         return err == Z_OK ? Z_BUF_ERROR : err;
sl@0:     }
sl@0:     *destLen = stream.total_out;
sl@0: 
sl@0:     err = deflateEnd_r(&stream);
sl@0:     return err;
sl@0: }
sl@0: 
sl@0: /* ===========================================================================
sl@0:  */
sl@0: 
sl@0: #ifdef __SYMBIAN32__
sl@0: EXPORT_C  int compress_r (Bytef * dest,    uLongf *  destLen,   const Bytef * source,  uLong  sourceLen)
sl@0: #else
sl@0: int ZEXPORT compress (dest, destLen, source, sourceLen)
sl@0:     Bytef *dest;
sl@0:     uLongf *destLen;
sl@0:     const Bytef *source;
sl@0:     uLong sourceLen;
sl@0: #endif //__SYMBIAN32__
sl@0: {
sl@0:     return compress2_r(dest, destLen, source, sourceLen, Z_DEFAULT_COMPRESSION);
sl@0: }
sl@0: 
sl@0: 
sl@0: /* ===========================================================================
sl@0:      If the default memLevel or windowBits for deflateInit() is changed, then
sl@0:    this function needs to be updated.
sl@0:  */
sl@0:  
sl@0: 
sl@0: #ifdef __SYMBIAN32__
sl@0: EXPORT_C  uLong  compressBound_r (uLong sourceLen)
sl@0: #else  
sl@0: uLong ZEXPORT compressBound (sourceLen)
sl@0:     uLong sourceLen;
sl@0: #endif //__SYMBIAN32__
sl@0: {
sl@0:     return sourceLen + (sourceLen >> 12) + (sourceLen >> 14) + 11;
sl@0: }
sl@0: 
sl@0: 
sl@0: