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/* ScummVM Tools
*
* ScummVM Tools 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 3 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, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef DEC_SIMPLE_DISASSEMBLER_H
#define DEC_SIMPLE_DISASSEMBLER_H
#include "disassembler.h"
/**
* Simple disassembler acting as a base for instruction sets only consisting of simple instructions (opcode params...).
*/
class SimpleDisassembler : public Disassembler {
protected:
uint32 _address; ///< Variable to maintain the current address.
/**
* Read parameters and associate them with an instruction.
*
* @param inst The instruction to associate the parameters with.
* @param typeString NUL-terminated string describing the type of each parameter.
*/
void readParams(InstPtr inst, const char *typeString);
/**
* Reads data for a single parameter.
*
* @param inst The instruction the parameter will belong to. Used for reference in parameter reading.
* @param type Character describing the type of the parameter.
* @return The read data as a ValuePtr.
*/
virtual ValuePtr readParameter(InstPtr inst, char type);
public:
/**
* Constructor for SimpleDisassembler.
*
* @param insts Reference to the vector in which disassembled instructions should be placed.
*/
SimpleDisassembler(InstVec &insts);
};
#define INC_ADDR _address++;
#define ADD_INST(category) _insts.push_back(new category());
#define LAST_INST (_insts.back())
#define START_OPCODES \
_address = _addressBase; \
while (_f.pos() != (int)_f.size()) { \
uint32 full_opcode = 0; \
uint8 opcode = _f.readByte(); \
std::string opcodePrefix; \
switch (opcode) {
#define END_OPCODES \
default: \
throw UnknownOpcodeException(_address, opcode);\
} \
INC_ADDR; \
}
#define OPCODE_BASE(val) \
case val: \
full_opcode = (full_opcode << 8) + val;
#define OPCODE_END break;
#define OPCODE_BODY(name, category, stackChange, params, codeGenData) \
ADD_INST(category); \
LAST_INST->_opcode = full_opcode; \
LAST_INST->_address = _address; \
LAST_INST->_stackChange = stackChange; \
LAST_INST->_name = opcodePrefix + std::string(name); \
LAST_INST->_codeGenData = codeGenData; \
readParams(LAST_INST, params); \
#define OPCODE_MD(val, name, category, stackChange, params, codeGenData) \
OPCODE_BASE(val)\
OPCODE_BODY(name, category, stackChange, params, codeGenData)\
OPCODE_END;
#define OPCODE(val, name, category, stackChange, params) \
OPCODE_MD(val, name, category, stackChange, params, "")
#define START_SUBOPCODE_WITH_PREFIX(val,prefix) \
OPCODE_BASE(val) \
opcodePrefix = prefix + std::string("."); \
opcode = _f.readByte(); \
switch (opcode) {
#define START_SUBOPCODE(val) \
OPCODE_BASE(val) \
opcode = _f.readByte(); \
switch (opcode) {
#define END_SUBOPCODE \
default: \
throw UnknownOpcodeException(_address, opcode);\
} \
INC_ADDR; \
OPCODE_END;
#endif
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