129 lines
2.4 KiB
C++
129 lines
2.4 KiB
C++
/*
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* Copyright 2003-2017 The Music Player Daemon Project
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* http://www.musicpd.org
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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 along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef MPD_FILE_READER_HXX
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#define MPD_FILE_READER_HXX
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#include "check.h"
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#include "Reader.hxx"
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#include "fs/AllocatedPath.hxx"
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#include "util/Compiler.h"
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#ifndef _WIN32
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#include "system/FileDescriptor.hxx"
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#endif
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#ifdef _WIN32
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#include <windows.h>
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#endif
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class Path;
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class FileInfo;
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class FileReader final : public Reader {
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AllocatedPath path;
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#ifdef _WIN32
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HANDLE handle;
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#else
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FileDescriptor fd;
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#endif
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public:
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explicit FileReader(Path _path);
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#ifdef _WIN32
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FileReader(FileReader &&other)
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:path(std::move(other.path)),
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handle(other.handle) {
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other.handle = INVALID_HANDLE_VALUE;
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}
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#else
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FileReader(FileReader &&other)
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:path(std::move(other.path)),
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fd(other.fd) {
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other.fd.SetUndefined();
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}
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#endif
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~FileReader() {
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if (IsDefined())
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Close();
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}
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protected:
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bool IsDefined() const {
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#ifdef _WIN32
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return handle != INVALID_HANDLE_VALUE;
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#else
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return fd.IsDefined();
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#endif
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}
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public:
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#ifndef _WIN32
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FileDescriptor GetFD() const {
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return fd;
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}
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#endif
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void Close();
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FileInfo GetFileInfo() const;
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gcc_pure
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uint64_t GetSize() const noexcept {
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#ifdef _WIN32
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LARGE_INTEGER size;
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return GetFileSizeEx(handle, &size)
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? size.QuadPart
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: 0;
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#else
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return fd.GetSize();
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#endif
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}
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gcc_pure
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uint64_t GetPosition() const noexcept {
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#ifdef _WIN32
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LARGE_INTEGER zero;
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zero.QuadPart = 0;
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LARGE_INTEGER position;
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return SetFilePointerEx(handle, zero, &position, FILE_CURRENT)
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? position.QuadPart
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: 0;
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#else
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return fd.Tell();
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#endif
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}
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void Rewind() {
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Seek(0);
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}
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void Seek(off_t offset);
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void Skip(off_t offset);
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/* virtual methods from class Reader */
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size_t Read(void *data, size_t size) override;
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};
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#endif
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