MOHAWK: Move Riven's name lists to a separate class

1 files changed, 102 insertions, 0 deletions

diff --git a/engines/mohawk/riven_stack.cpp b/engines/mohawk/riven_stack.cpp
new file mode 100644
index 0000000000..3ff34e7478
--- /dev/null
+++ b/engines/mohawk/riven_stack.cpp
@@ -0,0 +1,102 @@
+/* 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 "mohawk/riven_stack.h"
+
+#include "mohawk/riven.h"
+#include "mohawk/resource.h"
+
+namespace Mohawk {
+
+RivenNameList::RivenNameList() {
+
+}
+
+RivenNameList::RivenNameList(MohawkEngine_Riven *vm, uint16 id) {
+	loadResource(vm, id);
+}
+
+RivenNameList::~RivenNameList() {
+
+}
+
+void RivenNameList::loadResource(MohawkEngine_Riven *vm, uint16 id) {
+	Common::SeekableReadStream *nameStream = vm->getResource(ID_NAME, id);
+
+	uint16 namesCount = nameStream->readUint16BE();
+
+	Common::Array<uint16> stringOffsets;
+	stringOffsets.resize(namesCount);
+	for (uint16 i = 0; i < namesCount; i++) {
+		stringOffsets[i] = nameStream->readUint16BE();
+	}
+
+	_index.resize(namesCount);
+	for (uint16 i = 0; i < namesCount; i++) {
+		_index[i] = nameStream->readUint16BE();
+	}
+
+	int32 curNamesPos = nameStream->pos();
+
+	_names.resize(namesCount);
+	for (uint32 i = 0; i < namesCount; i++) {
+		nameStream->seek(curNamesPos + stringOffsets[i]);
+
+		Common::String name;
+		for (char c = nameStream->readByte(); c; c = nameStream->readByte())
+			name += c;
+
+		_names[i] = name;
+	}
+
+	delete nameStream;
+}
+
+Common::String RivenNameList::getName(uint16 nameID) const {
+	return _names[nameID];
+}
+
+int16 RivenNameList::getNameId(const Common::String &name) const {
+	int low = 0;
+	int high = _index.size() - 1;
+	int midpoint = 0;
+
+	// Binary search using the sorted _index array
+	while (low <= high)	{
+		midpoint = low + (high - low) / 2;
+
+		const Common::String &midpointName = _names[_index[midpoint]];
+
+		int comparison = name.compareToIgnoreCase(midpointName);
+		if (comparison == 0) {
+			return _index[midpoint];
+		} else if (comparison < 0) {
+			high = midpoint - 1;
+		} else {
+			low = midpoint + 1;
+		}
+	}
+
+	return -1;
+}
+
+} // End of namespace Mohawk