Script variables are now always stored in the game version's native endianess.

This should make Woodruff playable on big-endian systems.

svn-id: r32352

engines/gob/variables.h

@@ -0,0 +1,147 @@
+/* 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.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#ifndef GOB_VARIABLES_H
+#define GOB_VARIABLES_H
+
+namespace Gob {
+
+class Variables {
+public:
+	Variables(uint32 size);
+	virtual ~Variables();
+
+	void writeVar8(uint32 var, uint8 value);
+	void writeVar16(uint32 var, uint16 value);
+	void writeVar32(uint32 var, uint32 value);
+
+	void writeVarString(uint32 var, const char *value);
+
+	void writeOff8(uint32 offset, uint8 value);
+	void writeOff16(uint32 offset, uint16 value);
+	void writeOff32(uint32 offset, uint32 value);
+
+	void writeOffString(uint32 offset, const char *value);
+
+	uint8 readVar8(uint32 var) const;
+	uint16 readVar16(uint32 var) const;
+	uint32 readVar32(uint32 var) const;
+
+	void readVarString(uint32 var, char *value, uint32 length);
+
+	uint8 readOff8(uint32 offset) const;
+	uint16 readOff16(uint32 offset) const;
+	uint32 readOff32(uint32 offset) const;
+
+	void readOffString(uint32 offset, char *value, uint32 length);
+
+
+	const uint8 *getAddressVar8(uint32 var) const;
+	uint8 *getAddressVar8(uint32 var, uint32 n = 1);
+
+	const uint16 *getAddressVar16(uint32 var) const;
+	uint16 *getAddressVar16(uint32 var, uint32 n = 1);
+
+	const uint32 *getAddressVar32(uint32 var) const;
+	uint32 *getAddressVar32(uint32 var, uint32 n = 1);
+
+	const char *getAddressVarString(uint32 var) const;
+	char *getAddressVarString(uint32 var, uint32 n = 0xFFFFFFFF);
+
+	const uint8 *getAddressOff8(uint32 offset) const;
+	uint8 *getAddressOff8(uint32 offset, uint32 n = 1);
+
+	const uint16 *getAddressOff16(uint32 offset) const;
+	uint16 *getAddressOff16(uint32 offset, uint32 n = 1);
+
+	const uint32 *getAddressOff32(uint32 offset) const;
+	uint32 *getAddressOff32(uint32 offset, uint32 n = 1);
+
+	const char *getAddressOffString(uint32 offset) const;
+	char *getAddressOffString(uint32 offset, uint32 n = 0xFFFFFFFF);
+
+
+	bool copyTo(uint32 offset, byte *variables, byte *sizes, uint32 n) const;
+	bool copyFrom(uint32 offset, const byte *variables, const byte *sizes, uint32 n);
+
+protected:
+	virtual void write8(byte *buf, uint8 data) const = 0;
+	virtual void write16(byte *buf, uint16 data) const = 0;
+	virtual void write32(byte *buf, uint32 data) const = 0;
+
+	virtual uint8 read8(const byte *buf) const = 0;
+	virtual uint16 read16(const byte *buf) const = 0;
+	virtual uint32 read32(const byte *buf) const = 0;
+
+private:
+	// Basically the number of additional bytes occupied
+	static const byte kSize8 = 0;
+	static const byte kSize16 = 1;
+	static const byte kSize32 = 3;
+
+	uint32 _size;
+
+	byte *_vars;
+	byte *_sizes;
+
+	void clear();
+	void clearSize(uint32 offset);
+	void writeSize(uint32 offset, byte n);
+	void writeSizeString(uint32 offset, uint32 length);
+};
+
+class VariablesLE : public Variables {
+public:
+	VariablesLE(uint32 size);
+	~VariablesLE();
+
+protected:
+	void write8(byte *buf, uint8 data) const;
+	void write16(byte *buf, uint16 data) const;
+	void write32(byte *buf, uint32 data) const;
+
+	uint8 read8(const byte *buf) const;
+	uint16 read16(const byte *buf) const;
+	uint32 read32(const byte *buf) const;
+};
+
+class VariablesBE : public Variables {
+public:
+	VariablesBE(uint32 size);
+	~VariablesBE();
+
+protected:
+	void write8(byte *buf, uint8 data) const;
+	void write16(byte *buf, uint16 data) const;
+	void write32(byte *buf, uint32 data) const;
+
+	uint8 read8(const byte *buf) const;
+	uint16 read16(const byte *buf) const;
+	uint32 read32(const byte *buf) const;
+};
+
+} // End of namespace Gob
+
+#endif // GOB_VARIABLES_H