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/* <!-- copyright */
/*
* aria2 - The high speed download utility
*
* Copyright (C) 2010 Tatsuhiro Tsujikawa
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* In addition, as a special exception, the copyright holders give
* permission to link the code of portions of this program with the
* OpenSSL library under certain conditions as described in each
* individual source file, and distribute linked combinations
* including the two.
* You must obey the GNU General Public License in all respects
* for all of the code used other than OpenSSL. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you
* do not wish to do so, delete this exception statement from your
* version. If you delete this exception statement from all source
* files in the program, then also delete it here.
*/
/* copyright --> */
#ifndef D_GZIP_ENCODER_H
#define D_GZIP_ENCODER_H
#include "common.h"
#include <string>
#include <zlib.h>
namespace aria2 {
class GZipEncoder {
private:
z_stream* strm_;
bool finished_;
// Internal buffer for deflated data.
std::string internalBuf_;
std::string encode(const unsigned char* in, size_t length, int flush);
// Not implemented
GZipEncoder& operator<<(char c);
public:
GZipEncoder();
~GZipEncoder();
// Initializes deflator.
void init();
// Feeds NULL-terminated c-string s to deflater. The deflated
// result is kept in this class.
GZipEncoder& operator<<(const char* s);
// Feeds binary data in s to deflater. The deflated result is kept
// in this class.
GZipEncoder& operator<<(const std::string& s);
// Feeds binary data in s with size length to deflater. The
// deflated result is kept in this class.
GZipEncoder& write(const char* s, size_t length);
// Feeds integer to deflator. Before passed to deflator, i is
// converted to std::string using util::itos(). The deflated result
// is kept in this class.
GZipEncoder& operator<<(int64_t i);
// Feeds binary data pointed by in with size length to deflator and
// returns compressed output available so far. Don't use this
// method with operator<< methods.
std::string encode(const unsigned char* in, size_t length)
{
return encode(in, length, Z_NO_FLUSH);
}
// Returns true if deflator finished.
bool finished();
// Releases allocated resources.
void release();
// Returns deflated result kept internally. After this function
// call, further calls to operator<<() and encode() are not allowed.
std::string str();
};
} // namespace aria2
#endif // D_GZIP_ENCODER_H
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