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f2f8b14047
Saved sessions may very large, as in hundreds and even thousands of megabyte when dealing with large queues. Add support to save and reload sessions to gzipped files, when libz is available. The session serializer will output gzipped contents when the file ends with .gz, while the input file reader (UriListParser) will accept whatever is thrown at it.
106 lines
3.6 KiB
C++
106 lines
3.6 KiB
C++
/* <!-- copyright */
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/*
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* aria2 - The high speed download utility
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*
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* Copyright (C) 2011 Tatsuhiro Tsujikawa
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* In addition, as a special exception, the copyright holders give
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* permission to link the code of portions of this program with the
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* OpenSSL library under certain conditions as described in each
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* individual source file, and distribute linked combinations
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* including the two.
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* You must obey the GNU General Public License in all respects
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* for all of the code used other than OpenSSL. If you modify
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* file(s) with this exception, you may extend this exception to your
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* version of the file(s), but you are not obligated to do so. If you
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* do not wish to do so, delete this exception statement from your
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* version. If you delete this exception statement from all source
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* files in the program, then also delete it here.
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*/
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/* copyright --> */
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#ifndef D_BUFFERED_FILE_H
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#define D_BUFFERED_FILE_H
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#include "OutputFile.h"
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#include <cstdio>
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#include <string>
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#include <iosfwd>
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namespace aria2 {
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// This is a wrapper class for fopen/fclose/fread/fwrite/fgets.
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class BufferedFile:public OutputFile {
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private:
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typedef void (BufferedFile::*unspecified_bool_type)() const;
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void good_state() const {}
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public:
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BufferedFile(const char* filename, const char* mode);
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BufferedFile(FILE* fp);
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virtual ~BufferedFile();
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// Returns true if file is opened and ferror returns 0. Otherwise
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// returns false.
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operator unspecified_bool_type() const;
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// wrapper for fread. Using 1 for 2nd argument of fread.
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virtual size_t read(void* ptr, size_t count);
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// wrapper for fwrite. Using 1 for 2nd argument of fwrite.
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virtual size_t write(const void* ptr, size_t count);
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virtual size_t write(const char* str);
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// wrapper for fgets
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virtual char* gets(char* s, int size);
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// wrapper for fgets, but trailing '\n' is replaced with '\0'.
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char* getsn(char* s, int size);
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// Reads one line and returns it. The last '\n' is removed.
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std::string getLine();
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// wrapper for fclose
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virtual int close();
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// Return true if open_ && feof(fp_) != 0. Otherwise returns false.
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bool eof();
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// Convenient method. Read data to end of file and write them into
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// given stream. Returns written size.
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size_t transfer(std::ostream& out);
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virtual int vprintf(const char* format, va_list va);
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// wrapper for fflush
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virtual int flush();
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virtual bool supportsColor();
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// Mode for reading
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static const char READ[];
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// Mode for writing
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static const char WRITE[];
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// Mode for append
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static const char APPEND[];
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private:
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// Don't allow copying
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BufferedFile(const BufferedFile&);
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BufferedFile& operator=(const BufferedFile&);
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FILE* fp_;
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bool open_;
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bool supportsColor_;
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protected:
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virtual bool isError() const { return ferror(fp_); }
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virtual bool isEOF() const { return feof(fp_); }
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virtual bool isOpen() const { return open_; }
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};
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} // namespace aria2
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#endif // D_BUFFERED_FILE_H
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