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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"
namespace WebCore {
FileHandle::FileHandle(const String& path, FileSystem::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, FileSystem::invalidPlatformFileHandle) }
{
}
FileHandle::FileHandle(const String& path, FileSystem::FileOpenMode mode, OptionSet<FileSystem::FileLockMode> lockMode)
: m_path { path }
, m_mode { mode }
, m_lockMode { lockMode }
, m_shouldLock { true }
{
}
FileHandle::FileHandle(FileSystem::PlatformFileHandle handle)
: m_fileHandle(handle)
{
}
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, FileSystem::invalidPlatformFileHandle);
m_shouldLock = other.m_shouldLock;
m_lockMode = other.m_lockMode;
return *this;
}
FileHandle::operator bool() const
{
return FileSystem::isHandleValid(m_fileHandle);
}
bool FileHandle::open(const String& path, FileSystem::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 (m_path.isEmpty())
return false;
if (!*this)
m_fileHandle = m_shouldLock ? FileSystem::openAndLockFile(m_path, m_mode, m_lockMode) : FileSystem::openFile(m_path, m_mode);
return static_cast<bool>(*this);
}
int FileHandle::read(std::span<uint8_t> data)
{
if (!open())
return -1;
return FileSystem::readFromFile(m_fileHandle, data);
}
int FileHandle::write(std::span<const uint8_t> data)
{
if (!open())
return -1;
return FileSystem::writeToFile(m_fileHandle, data);
}
WTF_ALLOW_UNSAFE_BUFFER_USAGE_BEGIN
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(byteCast<uint8_t>(buffer.mutableSpan()).first(stringLength)) >= 0;
}
WTF_ALLOW_UNSAFE_BUFFER_USAGE_END
void FileHandle::close()
{
if (m_shouldLock && *this) {
// FileSystem::unlockAndCloseFile requires the file handle to be valid while closeFile does not
FileSystem::unlockAndCloseFile(m_fileHandle);
return;
}
FileSystem::closeFile(m_fileHandle);
}
FileSystem::PlatformFileHandle FileHandle::handle() const
{
return m_fileHandle;
}
String FileHandle::path() const
{
return m_path;
}
} // namespace WebCore
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