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/* <!-- copyright */
/*
* aria2 - The high speed download utility
*
* Copyright (C) 2011 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_IO_FILE_H
#define D_IO_FILE_H
#include "OutputFile.h"
#include <string>
#include <iosfwd>
namespace aria2 {
// This is a wrapper base class intended to provide
// fopen/fclose/fread/fwrite/fgets functionality.
class IOFile:public OutputFile {
private:
typedef void (IOFile::*unspecified_bool_type)() const;
void goodState() const {}
public:
IOFile() {}
virtual ~IOFile() {}
// Returns true if file is opened and ferror returns 0. Otherwise
// returns false.
operator unspecified_bool_type() const;
// wrapper for fread. Using 1 for 2nd argument of fread.
size_t read(void* ptr, size_t count);
// wrapper for fwrite. Using 1 for 2nd argument of fwrite.
size_t write(const void* ptr, size_t count);
virtual size_t write(const char* str) CXX11_OVERRIDE;
// wrapper for fgets
char* gets(char* s, int size);
// wrapper for fgets, but trailing '\n' is replaced with '\0'.
char* getsn(char* s, int size);
// Reads one line and returns it. The last '\n' is removed.
std::string getLine();
// wrapper for fclose
int close();
// wrapper for fflush
int flush() CXX11_OVERRIDE;
// Return true if file is opened && feof(fp_) != 0. Otherwise
// returns false.
bool eof();
// Returns true if file supports ANSI color escape codes.
bool supportsColor() CXX11_OVERRIDE;
// Convenient method. Read data to end of file and write them into
// given stream. Returns written size.
size_t transfer(std::ostream& out);
int vprintf(const char* format, va_list va) CXX11_OVERRIDE;
// Mode for reading
static const char READ[];
// Mode for writing
static const char WRITE[];
// Mode for append
static const char APPEND[];
protected:
virtual size_t onRead(void* ptr, size_t count) = 0;
virtual size_t onWrite(const void* ptr, size_t count) = 0;
virtual char* onGets(char* s, int size) = 0;
virtual int onVprintf(const char* format, va_list va) = 0;
virtual int onFlush() = 0;
virtual int onClose() = 0;
virtual bool onSupportsColor() = 0;
virtual bool isError() const = 0;
virtual bool isEOF() const = 0;
virtual bool isOpen() const = 0;
};
} // namespace aria2
#endif // D_IO_FILE_H
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