mirror of
https://github.com/hrydgard/ppsspp.git
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128 lines
3.4 KiB
C++
128 lines
3.4 KiB
C++
// Copyright (c) 2012- PPSSPP Project.
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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, version 2.0 or later versions.
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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 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official git repository and contact information can be found at
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// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
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#include <cstdio>
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#include "ppsspp_config.h"
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#include "util/text/utf8.h"
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#include "file/file_util.h"
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#include "Common/FileUtil.h"
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#include "Core/FileLoaders/LocalFileLoader.h"
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#ifdef _WIN32
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#include "Common/CommonWindows.h"
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#else
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#include <fcntl.h>
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#endif
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LocalFileLoader::LocalFileLoader(const std::string &filename)
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: filesize_(0), filename_(filename) {
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#ifndef _WIN32
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fd_ = open(filename.c_str(), O_RDONLY | O_CLOEXEC);
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if (fd_ == -1) {
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return;
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}
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#if defined(__ANDROID__) || (defined(_FILE_OFFSET_BITS) && _FILE_OFFSET_BITS < 64)
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off64_t off = lseek64(fd_, 0, SEEK_END);
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filesize_ = off;
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lseek64(fd_, 0, SEEK_SET);
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#else
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off_t off = lseek(fd_, 0, SEEK_END);
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filesize_ = off;
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lseek(fd_, 0, SEEK_SET);
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#endif
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#else // !_WIN32
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const DWORD access = GENERIC_READ, share = FILE_SHARE_READ, mode = OPEN_EXISTING, flags = FILE_ATTRIBUTE_NORMAL;
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#if PPSSPP_PLATFORM(UWP)
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handle_ = CreateFile2(ConvertUTF8ToWString(filename).c_str(), access, share, mode, nullptr);
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#else
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handle_ = CreateFile(ConvertUTF8ToWString(filename).c_str(), access, share, nullptr, mode, flags, nullptr);
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#endif
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if (handle_ == INVALID_HANDLE_VALUE) {
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return;
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}
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FILE_STANDARD_INFO info;
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if (GetFileInformationByHandleEx(handle_, FileStandardInfo, &info, sizeof(info)) == 0) {
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return;
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}
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filesize_ = info.EndOfFile.QuadPart;
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#endif // !_WIN32
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}
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LocalFileLoader::~LocalFileLoader() {
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#ifndef _WIN32
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if (fd_ != -1) {
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close(fd_);
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}
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#else
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if (handle_ != INVALID_HANDLE_VALUE) {
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CloseHandle(handle_);
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}
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#endif
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}
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bool LocalFileLoader::Exists() {
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// If we couldn't open it for reading, we say it does not exist.
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#ifndef _WIN32
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if (fd_ != -1 || IsDirectory()) {
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#else
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if (handle_ != INVALID_HANDLE_VALUE || IsDirectory()) {
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#endif
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FileInfo info;
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return getFileInfo(filename_.c_str(), &info);
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}
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return false;
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}
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bool LocalFileLoader::IsDirectory() {
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FileInfo info;
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if (getFileInfo(filename_.c_str(), &info)) {
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return info.isDirectory;
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}
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return false;
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}
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s64 LocalFileLoader::FileSize() {
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return filesize_;
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}
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std::string LocalFileLoader::Path() const {
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return filename_;
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}
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size_t LocalFileLoader::ReadAt(s64 absolutePos, size_t bytes, size_t count, void *data, Flags flags) {
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#ifndef _WIN32
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#if defined(_FILE_OFFSET_BITS) && _FILE_OFFSET_BITS < 64
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return pread64(fd_, data, bytes * count, absolutePos) / bytes;
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#else
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return pread(fd_, data, bytes * count, absolutePos) / bytes;
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#endif
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#else
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DWORD read = -1;
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OVERLAPPED offset = { 0 };
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offset.Offset = (DWORD)(absolutePos & 0xffffffff);
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offset.OffsetHigh = (DWORD)((absolutePos & 0xffffffff00000000) >> 32);
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auto result = ReadFile(handle_, data, (DWORD)(bytes * count), &read, &offset);
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return result == TRUE ? (size_t)read / bytes : -1;
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#endif
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}
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