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- #define ZLIB_INTERNAL
- #include "zlib.h"
- int ZEXPORT compress2 (dest, destLen, source, sourceLen, level)
- Bytef *dest;
- uLongf *destLen;
- const Bytef *source;
- uLong sourceLen;
- int level;
- {
- z_stream stream;
- int err;
- stream.next_in = (z_const Bytef *)source;
- stream.avail_in = (uInt)sourceLen;
- #ifdef MAXSEG_64K
-
- 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;
- }
- int ZEXPORT compress (dest, destLen, source, sourceLen)
- Bytef *dest;
- uLongf *destLen;
- const Bytef *source;
- uLong sourceLen;
- {
- return compress2(dest, destLen, source, sourceLen, Z_DEFAULT_COMPRESSION);
- }
- uLong ZEXPORT compressBound (sourceLen)
- uLong sourceLen;
- {
- return sourceLen + (sourceLen >> 12) + (sourceLen >> 14) +
- (sourceLen >> 25) + 13;
- }
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