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/*
* Copyright (C) 2016 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Apple Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "FileHandle.h"
#include <wtf/StringExtras.h>
namespace WebCore {
FileHandle::FileHandle(const String& path, FileOpenMode mode)
: m_path(path)
, m_mode(mode)
{
}
FileHandle::FileHandle(FileHandle&& other)
: m_path(WTFMove(other.m_path))
, m_mode(WTFMove(other.m_mode))
, m_fileHandle(std::exchange(other.m_fileHandle, invalidPlatformFileHandle))
{
}
FileHandle::~FileHandle()
{
close();
}
FileHandle& FileHandle::operator=(FileHandle&& other)
{
close();
m_path = WTFMove(other.m_path);
m_mode = WTFMove(other.m_mode);
m_fileHandle = std::exchange(other.m_fileHandle, invalidPlatformFileHandle);
return *this;
}
FileHandle::operator bool() const
{
return isHandleValid(m_fileHandle);
}
bool FileHandle::open(const String& path, FileOpenMode mode)
{
if (*this && path == m_path && mode == m_mode)
return true;
close();
m_path = path;
m_mode = mode;
return open();
}
bool FileHandle::open()
{
if (!*this)
m_fileHandle = openFile(m_path, m_mode);
return static_cast<bool>(*this);
}
int FileHandle::read(void* data, int length)
{
if (!open())
return -1;
return readFromFile(m_fileHandle, static_cast<char*>(data), length);
}
int FileHandle::write(const void* data, int length)
{
if (!open())
return -1;
return writeToFile(m_fileHandle, static_cast<const char*>(data), length);
}
bool FileHandle::printf(const char* format, ...)
{
va_list args;
va_start(args, format);
va_list preflightArgs;
va_copy(preflightArgs, args);
size_t stringLength = vsnprintf(nullptr, 0, format, preflightArgs);
va_end(preflightArgs);
Vector<char, 1024> buffer(stringLength + 1);
vsnprintf(buffer.data(), stringLength + 1, format, args);
va_end(args);
return write(buffer.data(), stringLength) >= 0;
}
void FileHandle::close()
{
closeFile(m_fileHandle);
}
} // namespace WebCore
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