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/*
* Copyright 2003-2017 The Music Player Daemon Project
* http://www.musicpd.org
*
* 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.
*/
#ifndef MPD_FILE_READER_HXX
#define MPD_FILE_READER_HXX
#include "check.h"
#include "Reader.hxx"
#include "fs/AllocatedPath.hxx"
#include "Compiler.h"
#ifndef WIN32
#include "system/FileDescriptor.hxx"
#endif
#ifdef WIN32
#include <windows.h>
#endif
class Path;
class FileInfo;
class FileReader final : public Reader {
AllocatedPath path;
#ifdef WIN32
HANDLE handle;
#else
FileDescriptor fd;
#endif
public:
explicit FileReader(Path _path);
#ifdef WIN32
FileReader(FileReader &&other)
:path(std::move(other.path)),
handle(other.handle) {
other.handle = INVALID_HANDLE_VALUE;
}
#else
FileReader(FileReader &&other)
:path(std::move(other.path)),
fd(other.fd) {
other.fd.SetUndefined();
}
#endif
~FileReader() {
if (IsDefined())
Close();
}
protected:
bool IsDefined() const {
#ifdef WIN32
return handle != INVALID_HANDLE_VALUE;
#else
return fd.IsDefined();
#endif
}
public:
#ifndef WIN32
FileDescriptor GetFD() const {
return fd;
}
#endif
void Close();
gcc_pure
FileInfo GetFileInfo() const;
gcc_pure
uint64_t GetSize() const {
#ifdef WIN32
LARGE_INTEGER size;
return GetFileSizeEx(handle, &size)
? size.QuadPart
: 0;
#else
return fd.GetSize();
#endif
}
gcc_pure
uint64_t GetPosition() const {
#ifdef WIN32
LARGE_INTEGER zero;
zero.QuadPart = 0;
LARGE_INTEGER position;
return SetFilePointerEx(handle, zero, &position, FILE_CURRENT)
? position.QuadPart
: 0;
#else
return fd.Tell();
#endif
}
void Rewind() {
Seek(0);
}
void Seek(off_t offset);
void Skip(off_t offset);
/* virtual methods from class Reader */
size_t Read(void *data, size_t size) override;
};
#endif