Aegisub/aegisub/libaegisub/unix/io.cpp

90 lines
2.3 KiB
C++

// Copyright (c) 2010, Amar Takhar <verm@aegisub.org>
//
// Permission to use, copy, modify, and distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
//
// $Id$
/// @file io.cpp
/// @brief Unix IO methods.
/// @ingroup libaegisub unix
#ifndef LAGI_PRE
#include <sys/stat.h>
#include <errno.h>
#include <iostream>
#include <fstream>
#endif
#include "libaegisub/io.h"
#include "libaegisub/log.h"
#include "libaegisub/util.h"
namespace agi {
namespace io {
std::ifstream* Open(const std::string &file) {
LOG_D("agi/io/open/file") << file;
acs::CheckFileRead(file);
std::ifstream *stream = new std::ifstream(file.c_str());
if (stream->fail())
throw IOFatal("Unknown fatal error as occurred");
return stream;
}
Save::Save(const std::string& file): file_name(file) {
LOG_D("agi/io/save/file") << file;
const std::string pwd = util::DirName(file);
acs::CheckDirWrite(pwd.c_str());
try {
acs::CheckFileWrite(file);
} catch (acs::AcsNotFound& e) {
// If the file doesn't exist we create a 0 byte file, this so so
// util::Rename will find it, and to let users know something went
// wrong by leaving a 0 byte file.
std::ofstream fp_touch(file.c_str());
fp_touch.close();
}
/// @todo This is a temp hack, proper implementation needs to come after
/// Windows support is added. The code in the destructor needs fixing
/// as well.
const std::string tmp = file + "_tmp";
// This will open to file.XXXX. (tempfile)
fp = new std::ofstream(tmp.c_str());
}
Save::~Save() {
const std::string tmp(file_name + "_tmp");
util::Rename(tmp, file_name);
delete fp;
fp = 0; // to avoid any silly errors.
}
std::ofstream& Save::Get() {
return *fp;
}
} // namespace io
} // namespace agi