mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-26 03:37:53 +00:00
96 lines
3.5 KiB
C++
96 lines
3.5 KiB
C++
/* Copyright (C) 1994-1998 Revolution Software Ltd.
|
|
* Copyright (C) 2003-2005 The ScummVM project
|
|
*
|
|
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
*
|
|
* $Header$
|
|
*/
|
|
|
|
#ifndef _INTERPRETER
|
|
#define _INTERPRETER
|
|
|
|
namespace Sword2 {
|
|
|
|
// Interpreter return codes
|
|
|
|
enum {
|
|
IR_STOP = 0, // Quit for a cycle
|
|
IR_CONT = 1, // Continue as normal
|
|
IR_TERMINATE = 2, // Return without updating the offset
|
|
IR_REPEAT = 3, // Return; offset at start of function call
|
|
IR_GOSUB = 4 // Return with updated offset
|
|
};
|
|
|
|
// Get parameter fix so that the playstation version can handle words not on
|
|
// word boundaries
|
|
|
|
#define Read8ip(var) { var = *((const int8 *)(code + ip)); ip++; }
|
|
#define Read16ip(var) { var = (int16) READ_LE_UINT16(code + ip); ip += sizeof(int16); }
|
|
#define Read32ip(var) { var = (int32) READ_LE_UINT32(code + ip); ip += sizeof(int32); }
|
|
#define Read32ipLeaveip(var) { var = (int32) READ_LE_UINT32(code + ip); }
|
|
|
|
enum {
|
|
// Compiled tokens
|
|
|
|
CP_END_SCRIPT = 0,
|
|
CP_PUSH_LOCAL_VAR32 = 1, // Push a local variable on to the stack
|
|
CP_PUSH_GLOBAL_VAR32 = 2, // Push a global variable
|
|
CP_POP_LOCAL_VAR32 = 3, // Pop a local variable from the stack
|
|
CP_CALL_MCODE = 4, // Call a machine code function
|
|
CP_PUSH_LOCAL_ADDR = 5, // Push the address of a local variable
|
|
CP_PUSH_INT32 = 6, // Adjust the stack after calling an fn function
|
|
CP_SKIPONFALSE = 7, // Skip if the bottom value on the stack is false
|
|
CP_SKIPALWAYS = 8, // Skip a block of code
|
|
CP_SWITCH = 9, // Switch on last stack value
|
|
CP_ADDNPOP_LOCAL_VAR32 = 10, // Add to a local varible
|
|
CP_SUBNPOP_LOCAL_VAR32 = 11, // Subtract from a local variable
|
|
CP_SKIPONTRUE = 12, // Skip if the bottom value on the stack is true
|
|
CP_POP_GLOBAL_VAR32 = 13, // Pop a global variable
|
|
CP_ADDNPOP_GLOBAL_VAR32 = 14, // Add to a global variable
|
|
CP_SUBNPOP_GLOBAL_VAR32 = 15, // Subtract from a global variable
|
|
CP_DEBUGON = 16, // Turn debugging on
|
|
CP_DEBUGOFF = 17, // Turn debugging off
|
|
CP_QUIT = 18, // Quit for a cycle
|
|
CP_TERMINATE = 19, // Quit script completely
|
|
|
|
// Operators
|
|
|
|
OP_ISEQUAL = 20, // '=='
|
|
OP_PLUS = 21, // '+'
|
|
OP_MINUS = 22, // '-'
|
|
OP_TIMES = 23, // '*'
|
|
OP_DIVIDE = 24, // '/'
|
|
OP_NOTEQUAL = 25, // '=='
|
|
OP_ANDAND = 26, // '&&'
|
|
OP_GTTHAN = 27, // '>'
|
|
OP_LSTHAN = 28, // '<'
|
|
|
|
// More tokens, mixed types
|
|
|
|
CP_JUMP_ON_RETURNED = 29, // Use table of jumps with value returned from fn_mcode
|
|
CP_TEMP_TEXT_PROCESS = 30, // A dummy text process command for me
|
|
CP_SAVE_MCODE_START = 31, // Save the mcode code start for restarting when necessary
|
|
CP_RESTART_SCRIPT = 32, // Start the script from the beginning
|
|
CP_PUSH_STRING = 33, // Push a pointer to a string on the stack
|
|
CP_PUSH_DEREFERENCED_STRUCTURE = 34, // Push the address of a structure thing
|
|
OP_GTTHANE = 35, // >=
|
|
OP_LSTHANE = 36, // <=
|
|
OP_OROR = 37 // || or OR
|
|
};
|
|
|
|
} // End of namespace Sword2
|
|
|
|
#endif
|