mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-16 06:39:17 +00:00
168 lines
4.3 KiB
C++
168 lines
4.3 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#ifndef GOB_VARIABLES_H
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#define GOB_VARIABLES_H
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namespace Gob {
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class Variables {
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public:
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enum Type {
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kVariableType8,
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kVariableType16,
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kVariableType32
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};
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Variables(uint32 size);
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virtual ~Variables();
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uint32 getSize() const;
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void writeVar8(uint32 var, uint8 value);
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void writeVar16(uint32 var, uint16 value);
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void writeVar32(uint32 var, uint32 value);
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void writeVarString(uint32 var, const char *value);
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void writeOff8(uint32 offset, uint8 value);
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void writeOff16(uint32 offset, uint16 value);
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void writeOff32(uint32 offset, uint32 value);
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void writeOffString(uint32 offset, const char *value);
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uint8 readVar8(uint32 var) const;
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uint16 readVar16(uint32 var) const;
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uint32 readVar32(uint32 var) const;
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void readVarString(uint32 var, char *value, uint32 length);
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uint8 readOff8(uint32 offset) const;
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uint16 readOff16(uint32 offset) const;
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uint32 readOff32(uint32 offset) const;
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void readOffString(uint32 offset, char *value, uint32 length);
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const uint8 *getAddressVar8(uint32 var) const;
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uint8 *getAddressVar8(uint32 var);
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const char *getAddressVarString(uint32 var) const;
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char *getAddressVarString(uint32 var);
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const uint8 *getAddressOff8(uint32 offset) const;
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uint8 *getAddressOff8(uint32 offset);
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const char *getAddressOffString(uint32 offset) const;
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char *getAddressOffString(uint32 offset);
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bool copyTo(uint32 offset, byte *variables, uint32 n) const;
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bool copyFrom(uint32 offset, const byte *variables, uint32 n);
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protected:
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virtual void write8(byte *buf, uint8 data) const = 0;
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virtual void write16(byte *buf, uint16 data) const = 0;
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virtual void write32(byte *buf, uint32 data) const = 0;
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virtual uint8 read8(const byte *buf) const = 0;
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virtual uint16 read16(const byte *buf) const = 0;
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virtual uint32 read32(const byte *buf) const = 0;
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private:
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uint32 _size;
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byte *_vars;
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void clear();
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};
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class VariablesLE : public Variables {
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public:
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VariablesLE(uint32 size);
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~VariablesLE();
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protected:
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void write8(byte *buf, uint8 data) const;
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void write16(byte *buf, uint16 data) const;
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void write32(byte *buf, uint32 data) const;
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uint8 read8(const byte *buf) const;
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uint16 read16(const byte *buf) const;
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uint32 read32(const byte *buf) const;
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};
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class VariablesBE : public Variables {
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public:
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VariablesBE(uint32 size);
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~VariablesBE();
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protected:
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void write8(byte *buf, uint8 data) const;
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void write16(byte *buf, uint16 data) const;
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void write32(byte *buf, uint32 data) const;
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uint8 read8(const byte *buf) const;
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uint16 read16(const byte *buf) const;
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uint32 read32(const byte *buf) const;
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};
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class VariableReference {
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public:
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VariableReference();
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VariableReference(Variables &vars, uint32 offset,
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Variables::Type type = Variables::kVariableType32);
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~VariableReference();
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void set(Variables &vars, uint32 offset, Variables::Type type = Variables::kVariableType32);
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VariableReference &operator=(uint32 value);
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VariableReference &operator+=(uint32 value);
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VariableReference &operator*=(uint32 value);
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operator uint32();
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private:
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Variables *_vars;
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uint32 _offset;
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Variables::Type _type;
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};
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class VariableStack {
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public:
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VariableStack(uint32 size);
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~VariableStack();
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void pushData(const Variables &vars, uint32 offset, uint32 size);
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void pushInt(uint32 value);
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void pop(Variables &vars, uint32 offset);
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private:
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byte *_stack;
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uint32 _size;
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uint32 _position;
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};
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} // End of namespace Gob
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#endif // GOB_VARIABLES_H
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