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/*
+----------------------------------------------------------------------+
| HipHop for PHP |
+----------------------------------------------------------------------+
| Copyright (c) 2010- Facebook, Inc. (http://www.facebook.com) |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
*/

#ifndef __COMPRESSION_H__
#define __COMPRESSION_H__

#include "base.h"
#include <zlib.h>

// encoding_mode
#define CODING_GZIP 1
#define CODING_DEFLATE 2

namespace HPHP {
///////////////////////////////////////////////////////////////////////////////

// inefficient way of testing whether a file can be compressed to smaller size
bool is_compressible_file(const char *filename);

char *gzencode(const char *data, int &len, int level, int encoding_mode);
char *gzdecode(const char *data, int &len);
char *gzcompress(const char *data, int &len, int level = -1);
char *gzuncompress(const char *data, int &len, int limit = 0);
char *gzdeflate(const char *data, int &len, int level = -1);
char *gzinflate(const char *data, int &len, int limit = 0);

///////////////////////////////////////////////////////////////////////////////

class StreamCompressor {
public:
  StreamCompressor(int level, int encoding_mode, bool header);
  ~StreamCompressor();

  /**
* Compress one chunk a time.
*/
  char *compress(const char *data, int &len, bool trailer);

private:
  int m_level;
  int m_encoding;
  bool m_header;
  z_stream m_stream;
  uLong m_crc;
  bool m_ended;
};

///////////////////////////////////////////////////////////////////////////////
}

#endif // __COMPRESSION_H__
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