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Diffstat (limited to 'engines/sword2/interpreter.h')
-rw-r--r-- | engines/sword2/interpreter.h | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/engines/sword2/interpreter.h b/engines/sword2/interpreter.h new file mode 100644 index 0000000000..365f818a98 --- /dev/null +++ b/engines/sword2/interpreter.h @@ -0,0 +1,96 @@ +/* Copyright (C) 1994-1998 Revolution Software Ltd. + * Copyright (C) 2003-2006 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + * $URL$ + * $Id$ + */ + +#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 = code[ip]; ip++; } +#define Read16ip(var) { var = (int16)READ_LE_UINT16(code + ip); ip += 2; } +#define Read32ip(var) { var = (int32)READ_LE_UINT32(code + ip); ip += 4; } +#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 |