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105 lines
3.7 KiB
C++
105 lines
3.7 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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* Additional copyright for this file:
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* Copyright (C) 1994-1998 Revolution Software Ltd.
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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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*
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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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*
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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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* $URL$
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* $Id$
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*/
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#ifndef SWORD2_INTERPRETER_H
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#define SWORD2_INTERPRETER_H
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#include "common/endian.h"
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namespace Sword2 {
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// Interpreter return codes
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enum {
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IR_STOP = 0, // Quit for a cycle
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IR_CONT = 1, // Continue as normal
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IR_TERMINATE = 2, // Return without updating the offset
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IR_REPEAT = 3, // Return; offset at start of function call
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IR_GOSUB = 4 // Return with updated offset
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};
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// Get parameter fix so that the playstation version can handle words not on
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// word boundaries
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#define Read8ip(var) { var = code[ip]; ip++; }
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#define Read16ip(var) { var = (int16)READ_LE_UINT16(code + ip); ip += 2; }
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#define Read32ip(var) { var = (int32)READ_LE_UINT32(code + ip); ip += 4; }
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#define Read32ipLeaveip(var) { var = (int32)READ_LE_UINT32(code + ip); }
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enum {
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// Compiled tokens
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CP_END_SCRIPT = 0,
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CP_PUSH_LOCAL_VAR32 = 1, // Push a local variable on to the stack
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CP_PUSH_GLOBAL_VAR32 = 2, // Push a global variable
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CP_POP_LOCAL_VAR32 = 3, // Pop a local variable from the stack
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CP_CALL_MCODE = 4, // Call a machine code function
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CP_PUSH_LOCAL_ADDR = 5, // Push the address of a local variable
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CP_PUSH_INT32 = 6, // Adjust the stack after calling an fn function
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CP_SKIPONFALSE = 7, // Skip if the bottom value on the stack is false
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CP_SKIPALWAYS = 8, // Skip a block of code
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CP_SWITCH = 9, // Switch on last stack value
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CP_ADDNPOP_LOCAL_VAR32 = 10, // Add to a local varible
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CP_SUBNPOP_LOCAL_VAR32 = 11, // Subtract from a local variable
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CP_SKIPONTRUE = 12, // Skip if the bottom value on the stack is true
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CP_POP_GLOBAL_VAR32 = 13, // Pop a global variable
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CP_ADDNPOP_GLOBAL_VAR32 = 14, // Add to a global variable
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CP_SUBNPOP_GLOBAL_VAR32 = 15, // Subtract from a global variable
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CP_DEBUGON = 16, // Turn debugging on
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CP_DEBUGOFF = 17, // Turn debugging off
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CP_QUIT = 18, // Quit for a cycle
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CP_TERMINATE = 19, // Quit script completely
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// Operators
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OP_ISEQUAL = 20, // '=='
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OP_PLUS = 21, // '+'
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OP_MINUS = 22, // '-'
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OP_TIMES = 23, // '*'
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OP_DIVIDE = 24, // '/'
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OP_NOTEQUAL = 25, // '=='
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OP_ANDAND = 26, // '&&'
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OP_GTTHAN = 27, // '>'
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OP_LSTHAN = 28, // '<'
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// More tokens, mixed types
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CP_JUMP_ON_RETURNED = 29, // Use table of jumps with value returned from fn_mcode
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CP_TEMP_TEXT_PROCESS = 30, // A dummy text process command for me
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CP_SAVE_MCODE_START = 31, // Save the mcode code start for restarting when necessary
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CP_RESTART_SCRIPT = 32, // Start the script from the beginning
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CP_PUSH_STRING = 33, // Push a pointer to a string on the stack
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CP_PUSH_DEREFERENCED_STRUCTURE = 34, // Push the address of a structure thing
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OP_GTTHANE = 35, // >=
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OP_LSTHANE = 36, // <=
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OP_OROR = 37 // || or OR
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};
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} // End of namespace Sword2
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#endif
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