1 files changed, 161 insertions, 0 deletions
diff --git a/engines/toltecs/resource.cpp b/engines/toltecs/resource.cpp
new file mode 100644
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--- /dev/null
+++ b/engines/toltecs/resource.cpp
@@ -0,0 +1,161 @@
+/* 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 "common/events.h"
+#include "common/keyboard.h"
+#include "common/file.h"
+#include "common/savefile.h"
+#include "common/config-manager.h"
+
+#include "base/plugins.h"
+#include "base/version.h"
+
+#include "sound/mixer.h"
+
+#include "toltecs/toltecs.h"
+#include "toltecs/resource.h"
+
+namespace Toltecs {
+
+
+/* ArchiveReader */
+
+ArchiveReader::ArchiveReader() {
+}
+
+ArchiveReader::~ArchiveReader() {
+}
+
+void ArchiveReader::openArchive(const char *filename) {
+	open(filename);
+	for (uint i = 0; i < 10000; i++)
+	    _offsets[i] = readUint32LE();
+}
+
+uint32 ArchiveReader::openResource(uint resIndex) {
+	uint32 resourceSize = getResourceSize(resIndex);
+	seek(_offsets[resIndex]);
+	return resourceSize;
+}
+
+void ArchiveReader::closeResource() {
+}
+
+
+uint32 ArchiveReader::getResourceSize(uint resIndex) {
+	return _offsets[resIndex + 1] - _offsets[resIndex];
+}
+
+void ArchiveReader::dump(uint resIndex, const char *prefix) {
+	int32 resourceSize = getResourceSize(resIndex);
+	byte *data = new byte[resourceSize];
+
+	char fn[256];
+	
+	if (prefix)
+		snprintf(fn, 256, "%s_%04X.0", prefix, resIndex);
+	else
+		snprintf(fn, 256, "%04X.0", resIndex);
+
+	openResource(resIndex);
+	read(data, resourceSize);
+	closeResource();
+
+	FILE *o = fopen(fn, "wb");
+	fwrite(data, resourceSize, 1, o);
+	fclose(o);
+
+	delete[] data;
+}
+
+/* ResourceCache */
+
+ResourceCache::ResourceCache(ToltecsEngine *vm) : _vm(vm) {
+
+	_base = new byte[kMaxCacheSize];
+	_bytesUsed = 0;
+
+	memset(_cache, 0, sizeof(_cache));
+	_cacheCount = 0;
+
+    _curItemOffset = 0;
+    _curItemSize = 0;
+
+}
+
+ResourceCache::~ResourceCache() {
+	delete[] _base;
+}
+
+byte *ResourceCache::load(uint resIndex) {
+	byte *data = NULL;
+	if (existsItem(resIndex)) {
+	    debug(1, "ResourceCache::load(%d) From cache", resIndex);
+	    data = _base + _curItemOffset;
+	} else {
+	    debug(1, "ResourceCache::load(%d) From disk", resIndex);
+	    uint32 size = _vm->_arc->openResource(resIndex);
+		data = addItem(resIndex, size);
+		_vm->_arc->read(data, size);
+		_vm->_arc->closeResource();
+	}
+	return data;
+}
+
+bool ResourceCache::existsItem(uint resIndex) {
+	for (uint i = 0; i < _cacheCount; i++) {
+	    if (_cache[i].resIndex == resIndex) {
+		    _curItemOffset = _cache[i].offset;
+		    _curItemSize = _cache[i].size;
+		    return true;
+		}
+	}
+	return false;
+}
+
+byte *ResourceCache::addItem(uint resIndex, uint32 size) {
+
+	checkCapacity(size);
+
+    _curItemOffset = _bytesUsed;
+    _curItemSize = size;
+
+    _cache[_cacheCount].resIndex = resIndex;
+    _cache[_cacheCount].offset = _curItemOffset;
+    _cache[_cacheCount].size = _curItemSize;
+    _cacheCount++;
+    
+    _bytesUsed += size;
+
+	return _base + _curItemOffset;
+
+}
+
+void ResourceCache::checkCapacity(uint32 size) {
+	if (_cacheCount > kMaxCacheItems || _bytesUsed + size > kMaxCacheSize) {
+        _cacheCount = 0;
+        _bytesUsed = 0;
+	}
+}
+
+} // End of namespace Toltecs