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309
src/Nazara/Core/Win32/FileImpl.cpp
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309
src/Nazara/Core/Win32/FileImpl.cpp
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// Copyright (C) 2012 Jérôme Leclercq
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// This file is part of the "Nazara Engine".
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// For conditions of distribution and use, see copyright notice in Config.hpp
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#include <Nazara/Core/Win32/FileImpl.hpp>
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#include <Nazara/Core/Error.hpp>
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#include <Nazara/Core/Win32/Time.hpp>
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#include <Nazara/Core/Debug.hpp>
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NzFileImpl::NzFileImpl(const NzFile* parent) :
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m_endOfFile(false)
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{
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NazaraUnused(parent);
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}
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NzFileImpl::~NzFileImpl()
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{
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}
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void NzFileImpl::Close()
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{
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CloseHandle(m_handle);
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}
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bool NzFileImpl::EndOfFile() const
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{
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return m_endOfFile;
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}
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void NzFileImpl::Flush()
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{
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if (!FlushFileBuffers(m_handle))
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NazaraError("Unable to flush file: " + NzGetLastSystemError());
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}
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nzUInt64 NzFileImpl::GetCursorPos() const
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{
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LARGE_INTEGER zero;
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zero.QuadPart = 0;
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LARGE_INTEGER position;
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SetFilePointerEx(m_handle, zero, &position, FILE_CURRENT);
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return position.QuadPart;
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}
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bool NzFileImpl::Open(const NzString& filePath, unsigned int mode)
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{
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DWORD access;
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DWORD shareMode = FILE_SHARE_READ;
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DWORD openMode;
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if (mode & NzFile::ReadOnly)
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{
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access = GENERIC_READ;
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openMode = OPEN_EXISTING;
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}
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else if (mode & NzFile::ReadWrite)
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{
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if (mode & NzFile::Append)
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access = FILE_APPEND_DATA;
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else
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access = GENERIC_READ | GENERIC_WRITE;
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if (mode & NzFile::Truncate)
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openMode = CREATE_ALWAYS;
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else
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openMode = OPEN_ALWAYS;
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}
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else if (mode & NzFile::WriteOnly)
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{
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if (mode & NzFile::Append)
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access = FILE_APPEND_DATA;
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else
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access = GENERIC_WRITE;
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if (mode & NzFile::Truncate)
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openMode = CREATE_ALWAYS;
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else
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openMode = OPEN_ALWAYS;
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}
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else
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return false;
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if ((mode & NzFile::Lock) == 0)
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shareMode |= FILE_SHARE_WRITE;
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wchar_t* path = filePath.GetWideBuffer();
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m_handle = CreateFileW(path, access, shareMode, nullptr, openMode, 0, nullptr);
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delete[] path;
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return m_handle != INVALID_HANDLE_VALUE;
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}
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std::size_t NzFileImpl::Read(void* buffer, std::size_t size)
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{
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DWORD read = 0;
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if (ReadFile(m_handle, buffer, size, &read, nullptr))
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{
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m_endOfFile = (size != read);
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return read;
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}
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else
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return 0;
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}
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bool NzFileImpl::SetCursorPos(NzFile::CursorPosition pos, nzInt64 offset)
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{
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DWORD moveMethod;
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switch (pos)
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{
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case NzFile::AtBegin:
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moveMethod = FILE_BEGIN;
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break;
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case NzFile::AtCurrent:
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moveMethod = FILE_CURRENT;
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break;
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case NzFile::AtEnd:
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moveMethod = FILE_END;
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break;
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default:
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NazaraInternalError("Cursor position not handled (0x" + NzString::Number(pos, 16) + ')');
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return false;
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}
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m_endOfFile = false;
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LARGE_INTEGER distance;
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distance.QuadPart = offset;
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return SetFilePointerEx(m_handle, distance, nullptr, moveMethod) != 0;
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}
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std::size_t NzFileImpl::Write(const void* buffer, std::size_t size)
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{
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DWORD written = 0;
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LARGE_INTEGER cursorPos;
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cursorPos.QuadPart = GetCursorPos();
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LockFile(m_handle, cursorPos.LowPart, cursorPos.HighPart, size, 0);
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WriteFile(m_handle, buffer, size, &written, nullptr);
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UnlockFile(m_handle, cursorPos.LowPart, cursorPos.HighPart, size, 0);
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return written;
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}
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bool NzFileImpl::Copy(const NzString& sourcePath, const NzString& targetPath)
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{
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wchar_t* path = sourcePath.GetWideBuffer();
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wchar_t* newPath = targetPath.GetWideBuffer();
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if (CopyFileW(path, newPath, false))
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{
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delete[] path;
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delete[] newPath;
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return true;
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}
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else
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{
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NazaraError("Unable to copy file: " + NzGetLastSystemError());
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delete[] path;
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delete[] newPath;
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return false;
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}
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}
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bool NzFileImpl::Delete(const NzString& filePath)
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{
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wchar_t* path = filePath.GetWideBuffer();
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if (DeleteFileW(path))
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{
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delete[] path;
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return true;
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}
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else
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{
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NazaraError("Unable to delete file (" + filePath + "): " + NzGetLastSystemError());
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delete[] path;
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return false;
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}
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}
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bool NzFileImpl::Exists(const NzString& filePath)
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{
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wchar_t* path = filePath.GetWideBuffer();
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HANDLE handle = CreateFileW(path, 0, FILE_SHARE_READ | FILE_SHARE_WRITE, nullptr, OPEN_EXISTING, 0, nullptr);
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delete[] path;
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if (handle == INVALID_HANDLE_VALUE)
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return false;
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CloseHandle(handle);
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return true;
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}
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time_t NzFileImpl::GetCreationTime(const NzString& filePath)
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{
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wchar_t* path = filePath.GetWideBuffer();
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HANDLE handle = CreateFileW(path, 0, FILE_SHARE_READ | FILE_SHARE_WRITE, nullptr, OPEN_EXISTING, 0, nullptr);
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delete[] path;
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if (handle == INVALID_HANDLE_VALUE)
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return 0;
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FILETIME creationTime;
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if (!GetFileTime(handle, &creationTime, nullptr, nullptr))
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{
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NazaraError("Unable to get creation time: " + NzGetLastSystemError());
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CloseHandle(handle);
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return 0;
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}
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CloseHandle(handle);
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return FileTimeToTime(&creationTime);
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}
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time_t NzFileImpl::GetLastAccessTime(const NzString& filePath)
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{
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wchar_t* path = filePath.GetWideBuffer();
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HANDLE handle = CreateFileW(path, 0, FILE_SHARE_READ, nullptr, OPEN_EXISTING, 0, nullptr);
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delete[] path;
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if (handle == INVALID_HANDLE_VALUE)
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return 0;
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FILETIME accessTime;
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if (!GetFileTime(handle, nullptr, &accessTime, nullptr))
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{
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NazaraError("Unable to get last access time: " + NzGetLastSystemError());
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CloseHandle(handle);
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return 0;
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}
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CloseHandle(handle);
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return FileTimeToTime(&accessTime);
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}
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time_t NzFileImpl::GetLastWriteTime(const NzString& filePath)
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{
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wchar_t* path = filePath.GetWideBuffer();
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HANDLE handle = CreateFileW(path, 0, FILE_SHARE_READ, nullptr, OPEN_EXISTING, 0, nullptr);
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delete[] path;
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if (handle == INVALID_HANDLE_VALUE)
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return 0;
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FILETIME writeTime;
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if (!GetFileTime(handle, nullptr, nullptr, &writeTime))
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{
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NazaraError("Unable to get last write time: " + NzGetLastSystemError());
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CloseHandle(handle);
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return 0;
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}
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CloseHandle(handle);
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return FileTimeToTime(&writeTime);
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}
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nzUInt64 NzFileImpl::GetSize(const NzString& filePath)
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{
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wchar_t* path = filePath.GetWideBuffer();
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HANDLE handle = CreateFileW(path, 0, FILE_SHARE_READ, nullptr, OPEN_EXISTING, 0, nullptr);
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delete[] path;
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if (handle == INVALID_HANDLE_VALUE)
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return 0;
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LARGE_INTEGER fileSize;
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if (!GetFileSizeEx(handle, &fileSize))
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fileSize.QuadPart = 0;
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CloseHandle(handle);
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return fileSize.QuadPart;
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}
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bool NzFileImpl::Rename(const NzString& sourcePath, const NzString& targetPath)
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{
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wchar_t* path = sourcePath.GetWideBuffer();
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wchar_t* newPath = targetPath.GetWideBuffer();
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bool success = MoveFileExW(path, newPath, MOVEFILE_COPY_ALLOWED) != 0;
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delete[] path;
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delete[] newPath;
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if (success)
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return true;
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else
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{
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NazaraError("Unable to rename file: " + NzGetLastSystemError());
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return false;
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}
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}
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