queen initial import

svn-id: r10462

1 files changed, 143 insertions, 0 deletions

diff --git a/queen/resource.cpp b/queen/resource.cpp
new file mode 100644
index 0000000000..c9aee12867
--- /dev/null
+++ b/queen/resource.cpp
@@ -0,0 +1,143 @@
+/* ScummVM - Scumm Interpreter
+ * Copyright (C) 2003 The ScummVM project
+ *
+ * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ *
+ * $Header$
+ *
+ */
+
+#include "queen/queen.h"
+#include "queen/resource.h"
+
+#define	DEMO_JAS_VERSION_OFFSET	0x119A8
+#define JAS_VERSION_OFFSET	0x12484
+
+static const char *dataFilename = "queen.1";
+
+QueenResource::QueenResource(char *datafilePath) {
+
+	_datafilePath = datafilePath;
+	_resourceFile = new File();
+	_resourceFile->open(dataFilename, _datafilePath);
+	if (_resourceFile->isOpen() == false)
+		error("Could not open resource file '%s%s'", _datafilePath, dataFilename);
+
+	//detect game version based on resource file size.
+	//we try to verify that it is indeed the version we think it is later on
+
+	switch(_resourceFile->size()) {
+		case 3724538:
+			_gameVersion = &_gameVersionPE100v1;
+			break;
+		case 3732177:
+			_gameVersion = &_gameVersionPE100v2;
+			break;
+		case 22677657:
+			_gameVersion = &_gameVersionPEM10;
+			break;
+		case 190787021:
+			_gameVersion = &_gameVersionCEM10;
+			break;
+		default:
+			error("Unknown/unsupported FOTAQ version");
+	}
+
+	debug(5, "Detected game version: %s, which has %d resource entries", _gameVersion->versionString, _gameVersion->resourceEntries);
+
+	if (strcmp(_gameVersion->versionString, JASVersion()))
+			error("Verifying game version failed! (expected: '%s', found: '%s')", _gameVersion->versionString, JASVersion());
+
+}
+
+QueenResource::~QueenResource() {
+	_resourceFile->close();
+}
+
+int32 QueenResource::resourceIndex(const char *filename) {
+
+	char entryName[14];
+	char *ptr = entryName;
+	
+	assert(strlen(filename));
+	strcpy(entryName, filename);
+	do
+		*ptr = toupper(*ptr);
+	while (*ptr++);
+
+
+	/*
+	for (uint32 i = 0; i < _gameVersion->resourceEntries; i++)
+		if (!(strcmp(entryName, _gameVersion->resourceTable[i].filename)))
+				return i;
+	return -1;
+	*/
+	
+	uint32 low = 0;
+	uint32 high = _gameVersion->resourceEntries - 1;
+
+	if (!strcmp(entryName, _gameVersion->resourceTable[low].filename))
+		return low;
+	if (!strcmp(entryName, _gameVersion->resourceTable[high].filename))
+		return high;
+	
+
+	//Use simple binary search to locate file
+	for(;;) {
+		uint32 cur = (low + high) / 2;
+		int32 diff = strcmp(entryName, _gameVersion->resourceTable[cur].filename);
+
+		if (!diff)
+			return cur;
+
+		if ((cur == low) || (cur == high))
+			break;
+
+		if (diff > 0)
+			low = cur;
+		else
+			high = cur;
+	}
+
+	error("Couldn't find file '%s'", entryName);
+	return -1;
+}
+
+uint32 QueenResource::fileSize(const char *filename) {
+	return _gameVersion->resourceTable[resourceIndex(filename)].size;
+}
+
+uint32 QueenResource::fileOffset(const char *filename) {
+	return _gameVersion->resourceTable[resourceIndex(filename)].offset;
+}
+
+uint8 *QueenResource::loadJAS() {
+	uint32 size = fileSize("QUEEN.JAS");
+	uint8 *jas = (uint8 *)malloc(size);
+	_resourceFile->seek(fileOffset("QUEEN.JAS") + 20, SEEK_SET);
+	_resourceFile->read(jas, size - 20);
+	return jas;
+}
+
+const char *QueenResource::JASVersion() {
+	static char versionStr[6];
+	if (_gameVersion->isDemo)
+		_resourceFile->seek(fileOffset("QUEEN.JAS") + DEMO_JAS_VERSION_OFFSET, SEEK_SET );
+	else
+		_resourceFile->seek(fileOffset("QUEEN.JAS") + JAS_VERSION_OFFSET, SEEK_SET);
+	_resourceFile->read(versionStr, 6);
+	return versionStr;
+}
+