Merge pull request #892 from Retro-Junk/cryo

CRYO: New engine

1 files changed, 122 insertions, 0 deletions

diff --git a/engines/cryo/ResourceManager.cpp b/engines/cryo/ResourceManager.cpp
new file mode 100644
index 0000000000..79218c598c
--- /dev/null
+++ b/engines/cryo/ResourceManager.cpp
@@ -0,0 +1,122 @@
+/* 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 2
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "ResourceManager.h"
+
+namespace Cryo {
+
+ResourceManager::ResourceManager() {
+}
+
+ResourceManager::ResourceManager(const Common::String &datFileName) {
+	LoadDatFile(datFileName);
+}
+
+ResourceManager::~ResourceManager() {
+}
+
+bool ResourceManager::LoadDatFile(const Common::String &datFileName) {
+	if (_datFile.isOpen()) {
+		_datFile.close();
+		_files.clear();
+	}
+
+	assert(_datFile.open(datFileName));
+
+	uint16 numFiles = _datFile.readUint16LE();
+
+	for (uint16 i = 0; i < numFiles; i++) {
+		DatFileEntry entry;
+
+		_datFile.read(entry._name, sizeof(entry._name));
+		entry._size = _datFile.readUint32LE();
+		entry._offset = _datFile.readUint32LE();
+		entry._flag = _datFile.readByte();
+
+		_files.push_back(entry);
+	}
+
+	return true;
+}
+
+Common::SeekableReadStream *ResourceManager::GetFile(const Common::String &resName, unsigned int hintIndex) {
+	// First, try raw disk file so we can support modding/patching
+
+	if (Common::File::exists(resName)) {
+		debug("Loading %s from disk", resName);
+
+		Common::File *resource = new Common::File();
+		resource->open(resName);
+		return resource;
+	}
+
+	// Look inside .dat file
+
+	if (_datFile.isOpen()) {
+		for (unsigned int i = hintIndex; i < _files.size(); i++) {
+			if (!resName.compareToIgnoreCase(_files[i]._name)) {
+				debug("Loading %s from dat file", resName);
+				Common::SeekableSubReadStream *resource = new Common::SeekableSubReadStream(&_datFile, _files[i]._offset, _files[i]._offset + _files[i]._size);
+				return resource;
+			}
+		}
+	}
+
+	debug("Unable to load %s - does't exists", resName);
+	return nullptr;
+}
+
+Common::SeekableReadStream *ResourceManager::GetFile(unsigned int resIndex) {
+	if (_files.size() > resIndex) {
+		return GetFile(Common::String(_files[resIndex]._name), resIndex);
+	}
+
+	return nullptr;
+}
+
+void *ResourceManager::StreamToBuffer(Common::SeekableReadStream *stream, unsigned int *size) {
+	if (!stream)
+		return nullptr;
+
+	unsigned int readSize = stream->size();
+	byte *data = new byte[readSize + 1];
+	readSize = stream->read(data, readSize);
+
+	if (size)
+		*size = readSize;
+	return data;
+}
+
+void *ResourceManager::GetData(const Common::String &resName, unsigned int *size) {
+	Common::SeekableReadStream *resource = GetFile(resName);
+	void *data = StreamToBuffer(resource, size);
+	delete resource;
+	return data;
+}
+
+void *ResourceManager::GetData(int resIndex, unsigned int *size) {
+	Common::SeekableReadStream *resource = GetFile(resIndex);
+	void *data = StreamToBuffer(resource, size);
+	delete resource;
+	return data;
+}
+}