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Diffstat (limited to 'engines/gob/variables.h')
| -rw-r--r-- | engines/gob/variables.h | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/engines/gob/variables.h b/engines/gob/variables.h new file mode 100644 index 0000000000..5989ed38ee --- /dev/null +++ b/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 |