dfaf08743c
Only _WIN32 is defined by the compiler, and WIN32 is not standardized and may be missing. Closes #169
155 lines
3.1 KiB
C++
155 lines
3.1 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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#include "config.h"
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#include "FileReader.hxx"
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#include "fs/FileInfo.hxx"
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#include "system/Error.hxx"
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#include <assert.h>
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#ifdef _WIN32
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FileReader::FileReader(Path _path)
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:path(_path),
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handle(CreateFile(path.c_str(), GENERIC_READ, FILE_SHARE_READ,
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nullptr, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL,
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nullptr))
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{
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if (handle == INVALID_HANDLE_VALUE)
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throw FormatLastError("Failed to open %s", path.ToUTF8().c_str());
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}
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FileInfo
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FileReader::GetFileInfo() const
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{
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assert(IsDefined());
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return FileInfo(path);
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}
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size_t
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FileReader::Read(void *data, size_t size)
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{
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assert(IsDefined());
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DWORD nbytes;
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if (!ReadFile(handle, data, size, &nbytes, nullptr))
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throw FormatLastError("Failed to read from %s",
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path.ToUTF8().c_str());
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return nbytes;
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}
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void
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FileReader::Seek(off_t offset)
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{
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assert(IsDefined());
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auto result = SetFilePointer(handle, offset, nullptr, FILE_BEGIN);
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if (result == INVALID_SET_FILE_POINTER)
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throw MakeLastError("Failed to seek");
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}
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void
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FileReader::Skip(off_t offset)
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{
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assert(IsDefined());
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auto result = SetFilePointer(handle, offset, nullptr, FILE_CURRENT);
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if (result == INVALID_SET_FILE_POINTER)
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throw MakeLastError("Failed to seek");
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}
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void
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FileReader::Close()
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{
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assert(IsDefined());
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CloseHandle(handle);
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}
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#else
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FileReader::FileReader(Path _path)
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:path(_path)
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{
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fd.OpenReadOnly(path.c_str());
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if (!fd.IsDefined())
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throw FormatErrno("Failed to open %s", path.ToUTF8().c_str());
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}
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FileInfo
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FileReader::GetFileInfo() const
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{
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assert(IsDefined());
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FileInfo info;
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const bool success = fstat(fd.Get(), &info.st) == 0;
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if (!success)
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throw FormatErrno("Failed to access %s",
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path.ToUTF8().c_str());
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return info;
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}
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size_t
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FileReader::Read(void *data, size_t size)
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{
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assert(IsDefined());
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ssize_t nbytes = fd.Read(data, size);
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if (nbytes < 0)
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throw FormatErrno("Failed to read from %s", path.ToUTF8().c_str());
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return nbytes;
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}
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void
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FileReader::Seek(off_t offset)
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{
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assert(IsDefined());
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auto result = fd.Seek(offset);
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const bool success = result >= 0;
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if (!success)
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throw MakeErrno("Failed to seek");
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}
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void
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FileReader::Skip(off_t offset)
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{
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assert(IsDefined());
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auto result = fd.Skip(offset);
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const bool success = result >= 0;
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if (!success)
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throw MakeErrno("Failed to seek");
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}
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void
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FileReader::Close()
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{
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assert(IsDefined());
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fd.Close();
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}
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#endif
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