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engines/saga/resource_rsc.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/>.
+ *
+ */
+
+// RSC Resource file management module (SAGA 1, used in ITE)
+
+#include "saga/saga.h"
+#include "saga/resource.h"
+
+namespace Saga {
+
+void ResourceContext_RSC::processPatches(Resource *resource, const GamePatchDescription *patchFiles) {
+	const GamePatchDescription *patchDescription;
+	ResourceData *resourceData;
+
+	// Process external patch files
+	for (patchDescription = patchFiles; patchDescription && patchDescription->fileName; ++patchDescription) {
+		if ((patchDescription->fileType & _fileType) != 0) {
+			if (patchDescription->resourceId < _table.size()) {
+				resourceData = &_table[patchDescription->resourceId];
+				// Check if we've already found a patch for this resource. One is enough.
+				if (!resourceData->patchData) {
+					resourceData->patchData = new PatchData(patchDescription->fileName);
+					Common::SeekableReadStream *s = resourceData->patchData->getStream();
+					if (s) {
+						resourceData->offset = 0;
+						resourceData->size = s->size();
+						// The patched ITE file is in memory, so close the patch file
+						resourceData->patchData->closeStream();
+					} else {
+						delete resourceData->patchData;
+						resourceData->patchData = nullptr;
+					}
+				}
+			}
+		}
+	}
+}
+
+} // End of namespace Saga