Initial commit

backends/fs/windows/windows-fs.cpp

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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#if defined(WIN32)
+
+// Disable symbol overrides so that we can use system headers.
+#define FORBIDDEN_SYMBOL_ALLOW_ALL
+
+#include "backends/fs/windows/windows-fs.h"
+#include "backends/fs/stdiostream.h"
+
+bool WindowsFilesystemNode::exists() const {
+	// Check whether the file actually exists
+	return (GetFileAttributes(charToTchar(_path.c_str())) != INVALID_FILE_ATTRIBUTES);
+}
+
+bool WindowsFilesystemNode::isReadable() const {
+	// Since all files are always readable and it is not possible to give
+	// write-only permission, this is equivalent to ::exists().
+	return (GetFileAttributes(charToTchar(_path.c_str())) != INVALID_FILE_ATTRIBUTES);
+}
+
+bool WindowsFilesystemNode::isWritable() const {
+	// Check whether the file exists and it can be written.
+	DWORD fileAttribs = GetFileAttributes(charToTchar(_path.c_str()));
+	return ((fileAttribs != INVALID_FILE_ATTRIBUTES) && (!(fileAttribs & FILE_ATTRIBUTE_READONLY)));
+}
+
+void WindowsFilesystemNode::addFile(AbstractFSList &list, ListMode mode, const char *base, bool hidden, WIN32_FIND_DATA* find_data) {
+	// Skip local directory (.) and parent (..)
+	if (!_tcscmp(find_data->cFileName, TEXT(".")) ||
+		!_tcscmp(find_data->cFileName, TEXT("..")))
+		return;
+
+	// Skip hidden files if asked
+	if ((find_data->dwFileAttributes & FILE_ATTRIBUTE_HIDDEN) && !hidden)
+		return;
+
+	bool isDirectory = ((find_data->dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) ? true : false);
+
+	if ((!isDirectory && mode == Common::FSNode::kListDirectoriesOnly) ||
+		(isDirectory && mode == Common::FSNode::kListFilesOnly))
+		return;
+
+	const char *fileName = tcharToChar(find_data->cFileName);
+
+	WindowsFilesystemNode entry;
+	entry._isDirectory = isDirectory;
+	entry._displayName = fileName;
+	entry._path = base;
+	entry._path += fileName;
+	if (entry._isDirectory)
+		entry._path += "\\";
+	entry._isValid = true;
+	entry._isPseudoRoot = false;
+
+	list.push_back(new WindowsFilesystemNode(entry));
+}
+
+const char* WindowsFilesystemNode::tcharToChar(const TCHAR *str) {
+#ifndef UNICODE
+	return str;
+#else
+	static char multiByteString[MAX_PATH];
+	WideCharToMultiByte(CP_UTF8, 0, str, _tcslen(str) + 1, multiByteString, MAX_PATH, nullptr, nullptr);
+	return multiByteString;
+#endif
+}
+
+const TCHAR* WindowsFilesystemNode::charToTchar(const char *str) {
+#ifndef UNICODE
+	return str;
+#else
+	static wchar_t wideCharString[MAX_PATH];
+	MultiByteToWideChar(CP_UTF8, 0, str, strlen(str) + 1, wideCharString, MAX_PATH);
+	return wideCharString;
+#endif
+}
+
+WindowsFilesystemNode::WindowsFilesystemNode() {
+	// Create a virtual root directory for standard Windows system
+	_isDirectory = true;
+	_isValid = false;
+	_path = "";
+	_isPseudoRoot = true;
+}
+
+WindowsFilesystemNode::WindowsFilesystemNode(const Common::String &p, const bool currentDir) {
+	if (currentDir) {
+		TCHAR path[MAX_PATH];
+		GetCurrentDirectory(MAX_PATH, path);
+		_path = tcharToChar(path);
+	} else {
+		assert(p.size() > 0);
+		_path = p;
+	}
+
+	_displayName = lastPathComponent(_path, '\\');
+
+	setFlags();
+
+	_isPseudoRoot = false;
+}
+
+void WindowsFilesystemNode::setFlags() {
+	// Check whether it is a directory, and whether the file actually exists
+	DWORD fileAttribs = GetFileAttributes(charToTchar(_path.c_str()));
+
+	if (fileAttribs == INVALID_FILE_ATTRIBUTES) {
+		_isDirectory = false;
+		_isValid = false;
+	} else {
+		_isDirectory = ((fileAttribs & FILE_ATTRIBUTE_DIRECTORY) != 0);
+		_isValid = true;
+		// Add a trailing slash, if necessary.
+		if (_isDirectory && _path.lastChar() != '\\') {
+			_path += '\\';
+		}
+	}
+}
+
+AbstractFSNode *WindowsFilesystemNode::getChild(const Common::String &n) const {
+	assert(_isDirectory);
+
+	// Make sure the string contains no slashes
+	assert(!n.contains('/'));
+
+	Common::String newPath(_path);
+	if (_path.lastChar() != '\\')
+		newPath += '\\';
+	newPath += n;
+
+	return new WindowsFilesystemNode(newPath, false);
+}
+
+bool WindowsFilesystemNode::getChildren(AbstractFSList &myList, ListMode mode, bool hidden) const {
+	assert(_isDirectory);
+
+	if (_isPseudoRoot) {
+		// Drives enumeration
+		TCHAR drive_buffer[100];
+		GetLogicalDriveStrings(sizeof(drive_buffer) / sizeof(TCHAR), drive_buffer);
+
+		for (TCHAR *current_drive = drive_buffer; *current_drive;
+			current_drive += _tcslen(current_drive) + 1) {
+				WindowsFilesystemNode entry;
+				char drive_name[2];
+
+				drive_name[0] = tcharToChar(current_drive)[0];
+				drive_name[1] = '\0';
+				entry._displayName = drive_name;
+				entry._isDirectory = true;
+				entry._isValid = true;
+				entry._isPseudoRoot = false;
+				entry._path = tcharToChar(current_drive);
+				myList.push_back(new WindowsFilesystemNode(entry));
+		}
+	} else {
+		// Files enumeration
+		WIN32_FIND_DATA desc;
+		HANDLE handle;
+		char searchPath[MAX_PATH + 10];
+
+		Common::sprintf_s(searchPath, "%s*", _path.c_str());
+
+		handle = FindFirstFile(charToTchar(searchPath), &desc);
+
+		if (handle == INVALID_HANDLE_VALUE)
+			return false;
+
+		addFile(myList, mode, _path.c_str(), hidden, &desc);
+
+		while (FindNextFile(handle, &desc))
+			addFile(myList, mode, _path.c_str(), hidden, &desc);
+
+		FindClose(handle);
+	}
+
+	return true;
+}
+
+AbstractFSNode *WindowsFilesystemNode::getParent() const {
+	assert(_isValid || _isPseudoRoot);
+
+	if (_isPseudoRoot)
+		return nullptr;
+
+	WindowsFilesystemNode *p;
+	if (_path.size() > 3) {
+		const char *start = _path.c_str();
+		const char *end = lastPathComponent(_path, '\\');
+
+		p = new WindowsFilesystemNode();
+		p->_path = Common::String(start, end - start);
+		p->_isValid = true;
+		p->_isDirectory = true;
+		p->_displayName = lastPathComponent(p->_path, '\\');
+		p->_isPseudoRoot = false;
+	} else {
+		// pseudo root
+		p = new WindowsFilesystemNode();
+	}
+
+	return p;
+}
+
+Common::SeekableReadStream *WindowsFilesystemNode::createReadStream() {
+	return StdioStream::makeFromPath(getPath(), StdioStream::WriteMode_Read);
+}
+
+Common::SeekableWriteStream *WindowsFilesystemNode::createWriteStream(bool atomic) {
+	return StdioStream::makeFromPath(getPath(), atomic ?
+			StdioStream::WriteMode_WriteAtomic : StdioStream::WriteMode_Write);
+}
+
+bool WindowsFilesystemNode::createDirectory() {
+	if (CreateDirectory(charToTchar(_path.c_str()), nullptr) != 0)
+		setFlags();
+
+	return _isValid && _isDirectory;
+}
+
+#endif //#ifdef WIN32