Initial commit

engines/gob/totfile.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/>.
+ *
+ *
+ * This file is dual-licensed.
+ * In addition to the GPLv3 license mentioned above, this code is also
+ * licensed under LGPL 2.1. See LICENSES/COPYING.LGPL file for the
+ * full text of the license.
+ *
+ */
+
+#include "common/str.h"
+#include "common/stream.h"
+
+#include "gob/gob.h"
+#include "gob/totfile.h"
+#include "gob/dataio.h"
+#include "gob/videoplayer.h"
+
+namespace Gob {
+
+TOTFile::TOTFile(GobEngine *vm) : _vm(vm) {
+	_stream = nullptr;
+
+	memset(_header, 0, 128);
+}
+
+TOTFile::~TOTFile() {
+	unload();
+}
+
+bool TOTFile::load(const Common::String &fileName) {
+	// Trying to open normally
+	_stream = _vm->_dataIO->getFile(fileName);
+
+	if (!_stream)
+		// Trying to open from video
+		_stream = _vm->_vidPlayer->getEmbeddedFile(fileName);
+
+	if (!_stream)
+		return false;
+
+	if (_stream->read(_header, 128) != 128)
+		return false;
+
+	_stream->seek(0);
+
+	return true;
+}
+
+void TOTFile::unload() {
+	delete _stream;
+
+	_stream = nullptr;
+}
+
+Common::SeekableReadStream *TOTFile::getStream() const {
+	return _stream;
+}
+
+bool TOTFile::getProperties(Properties &props) const {
+	if (!_stream)
+		return false;
+
+	// Offset 39-41: Version in "Major.Minor" string form
+	if (_header[40] != '.')
+		return false;
+
+	props.versionMajor = _header[39] - '0';
+	props.versionMinor = _header[41] - '0';
+
+	props.variablesCount = READ_LE_UINT32(_header + 44);
+
+	props.textsOffset     = READ_LE_UINT32(_header + 48);
+	props.resourcesOffset = READ_LE_UINT32(_header + 52);
+
+	props.animDataSize = READ_LE_UINT16(_header + 56);
+
+	props.imFileNumber   = _header[59];
+	props.exFileNumber   = _header[60];
+	props.communHandling = _header[61];
+
+	for (int i = 0; i < 14; i++)
+		props.functions[i] = READ_LE_UINT16(_header + 100 + i * 2);
+
+	uint32 fileSize        = _stream->size();
+	uint32 textsOffset     = props.textsOffset;
+	uint32 resourcesOffset = props.resourcesOffset;
+
+	if (textsOffset == 0xFFFFFFFF)
+		textsOffset = 0;
+	if (resourcesOffset == 0xFFFFFFFF)
+		resourcesOffset = 0;
+
+	props.scriptEnd = fileSize;
+	if (textsOffset > 0)
+		props.scriptEnd = MIN(props.scriptEnd, textsOffset);
+	if (resourcesOffset > 0)
+		props.scriptEnd = MIN(props.scriptEnd, resourcesOffset);
+
+	// Calculate the sizes of the texts and resources tables for every possible order
+	if ((textsOffset > 0) && (resourcesOffset > 0)) {
+		// Both exists
+
+		if (props.textsOffset > resourcesOffset) {
+			// First resources, then texts
+			props.textsSize     = fileSize - textsOffset;
+			props.resourcesSize = textsOffset - resourcesOffset;
+		} else {
+			// First texts, then resources
+			props.textsSize     = resourcesOffset - textsOffset;
+			props.resourcesSize = fileSize - resourcesOffset;
+		}
+	} else if (textsOffset     > 0) {
+		// Only the texts table exists
+
+		props.textsSize     = fileSize - textsOffset;
+		props.resourcesSize = 0;
+	} else if (resourcesOffset > 0) {
+		// Only the resources table exists
+
+		props.textsSize     = 0;
+		props.resourcesSize = fileSize - resourcesOffset;
+	} else {
+		// Both don't exists
+
+		props.textsSize     = 0;
+		props.resourcesSize = 0;
+	}
+
+	return true;
+}
+
+Common::String TOTFile::createFileName(const Common::String &base, bool &isLOM) {
+	isLOM = false;
+
+	const char *dot;
+	if ((dot = strrchr(base.c_str(), '.'))) {
+		// fileName includes an extension
+
+		if (!scumm_stricmp(dot + 1, "LOM"))
+			isLOM = true;
+
+		return base;
+	}
+
+	return base + ".tot";
+}
+
+Common::String TOTFile::getFileBase(const Common::String &fileName) {
+	const char *dot;
+	if ((dot = strrchr(fileName.c_str(), '.'))) {
+		// fileName includes an extension
+		return Common::String(fileName.c_str(), dot);
+	}
+
+	return fileName;
+}
+
+} // End of namespace Gob