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/*
* libopenraw - stream.h
*
* Copyright (C) 2006 Hubert Figuière
*
* This library is free software: you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation, either version 3 of
* the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*/
#ifndef __IO_STREAM_H__
#define __IO_STREAM_H__
#include <sys/types.h>
#include <unistd.h>
#include <string>
#include <libopenraw/libopenraw.h>
#include "exception.h"
namespace OpenRaw {
namespace IO {
/**
* @brief base virtual class for IO
*/
class Stream
{
public:
/** Construct the file
* @param filename the full uri for the file
*/
Stream(const char *filename);
virtual ~Stream();
/** Error type.
* @see or_error
*/
typedef ::or_error Error;
// file APIs
/** open the file */
virtual Error open() = 0;
/** close the file */
virtual int close() = 0;
/** seek in the file. Semantics are similar to POSIX lseek() */
virtual int seek(off_t offset, int whence) = 0;
/** read in the file. Semantics are similar to POSIX read() */
virtual int read(void *buf, size_t count) = 0;
virtual off_t filesize() = 0;
// virtual void *mmap(size_t l, off_t offset) = 0;
// virtual int munmap(void *addr, size_t l) = 0;
Error get_error()
{
return m_error;
}
/** get the uri path of the file */
const std::string &get_path() const
{
return m_fileName;
}
uint8_t readByte() throw(Internals::IOException);
protected:
void set_error(Error error)
{
m_error = error;
}
private:
/** private copy constructor to make sure it is not called */
Stream(const Stream& f);
/** private = operator to make sure it is never called */
Stream & operator=(const Stream&);
/** the file name (full path) */
std::string m_fileName;
Error m_error;
};
}
}
#endif
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