76 lines
2.4 KiB
C++
76 lines
2.4 KiB
C++
// Copyright (c) 2010, Amar Takhar <verm@aegisub.org>
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//
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// Permission to use, copy, modify, and distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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/// @file io.cpp
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/// @brief Windows IO methods.
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/// @ingroup libaegisub
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#include "libaegisub/io.h"
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#include <libaegisub/access.h>
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#include "libaegisub/fs.h"
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#include "libaegisub/log.h"
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#include "libaegisub/make_unique.h"
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#include "libaegisub/util.h"
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#include <boost/filesystem/fstream.hpp>
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#include <boost/filesystem/operations.hpp>
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namespace agi {
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namespace io {
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std::unique_ptr<std::istream> Open(fs::path const& file, bool binary) {
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LOG_D("agi/io/open/file") << file;
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auto stream = agi::make_unique<boost::filesystem::ifstream>(file, (binary ? std::ios::binary : std::ios::in));
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if (stream->fail()) {
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acs::CheckFileRead(file);
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throw IOFatal("Unknown fatal error occurred opening " + file.string());
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}
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return std::unique_ptr<std::istream>(stream.release());
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}
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Save::Save(fs::path const& file, bool binary)
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: file_name(file)
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, tmp_name(unique_path(file.parent_path()/(file.stem().string() + "_tmp_%%%%" + file.extension().string())))
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{
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LOG_D("agi/io/save/file") << file;
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fp = agi::make_unique<boost::filesystem::ofstream>(tmp_name, binary ? std::ios::binary : std::ios::out);
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if (!fp->good()) {
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acs::CheckDirWrite(file.parent_path());
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acs::CheckFileWrite(file);
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throw fs::WriteDenied(tmp_name);
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}
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}
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Save::~Save() noexcept(false) {
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fp.reset(); // Need to close before rename on Windows to unlock the file
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for (int i = 0; i < 10; ++i) {
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try {
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fs::Rename(tmp_name, file_name);
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return;
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}
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catch (agi::fs::FileSystemError const&) {
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// Retry up to ten times in case it's just locked by a poorly-written antivirus scanner
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if (i == 9)
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throw;
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util::sleep_for(100);
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}
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}
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}
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} // namespace io
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} // namespace agi
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