#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()
{
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);
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 (!*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(void* data, int length)
{
if (!open())
return -1;
return FileSystem::readFromFile(m_fileHandle, static_cast<char*>(data), length);
}
int FileHandle::write(const void* data, int length)
{
if (!open())
return -1;
return FileSystem::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()
{
if (m_shouldLock && *this) {
FileSystem::unlockAndCloseFile(m_fileHandle);
} else
FileSystem::closeFile(m_fileHandle);
}
}