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/* ScummVM - Graphic Adventure Engine
*
* ScummVM 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 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.
*
*/
// Heavily inspired by hoc
// Copyright (C) AT&T 1995
// All Rights Reserved
//
// Permission to use, copy, modify, and distribute this software and
// its documentation for any purpose and without fee is hereby
// granted, provided that the above copyright notice appear in all
// copies and that both that the copyright notice and this
// permission notice and warranty disclaimer appear in supporting
// documentation, and that the name of AT&T or any of its entities
// not be used in advertising or publicity pertaining to
// distribution of the software without specific, written prior
// permission.
//
// AT&T DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
// INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
// IN NO EVENT SHALL AT&T OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
// SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
// IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
// ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
// THIS SOFTWARE.
%debug
%{
#define FORBIDDEN_SYMBOL_ALLOW_ALL
#include "common/hash-str.h"
#include "director/lingo/lingo.h"
#include "director/lingo/lingo-gr.h"
extern int yylex();
extern int yyparse();
void yyerror(char *s) { error("%s", s); }
using namespace Director;
%}
%union {
Common::String *s;
int i;
float f;
int code;
}
%token UNARY UNDEF
%token<i> INT
%token<f> FLOAT
%token<s> VAR STRING
%token tIF tELSE tEND tFRAME tGO tINTO tLOOP tMCI tMCIWAIT tMOVIE tNEXT tOF tPREVIOUS
%token tPUT tSET tTHEN tTO
%token tGE tLE tGT tLT tEQ tNEQ
%type<code> asgn cond expr if end stmtlist
%type<s> gotoframe gotomovie
%right '='
%left '+' '-'
%left '*' '/' '%'
%right UNARY
%%
program: programline '\n' program
| programline
;
programline:
| func
| asgn { g_lingo->code1(g_lingo->c_xpop); }
| stmt
| expr { g_lingo->code1(g_lingo->c_printtop); }
| error { yyerrok; }
| /* empty */
;
asgn: tPUT expr tINTO VAR { g_lingo->code1(g_lingo->c_varpush); g_lingo->codeString($4->c_str()); g_lingo->code1(g_lingo->c_assign); $$ = $2; delete $4; }
| tSET VAR '=' expr { g_lingo->code1(g_lingo->c_varpush); g_lingo->codeString($2->c_str()); g_lingo->code1(g_lingo->c_assign); $$ = $4; delete $2; }
| tSET VAR tTO expr { g_lingo->code1(g_lingo->c_varpush); g_lingo->codeString($2->c_str()); g_lingo->code1(g_lingo->c_assign); $$ = $4; delete $2; }
;
stmt: expr { g_lingo->code1(g_lingo->c_xpop); }
| if cond tTHEN stmtlist end tEND tIF {
inst then, end;
WRITE_LE_UINT32(&then, $4);
WRITE_LE_UINT32(&end, $5);
(*g_lingo->_currentScript)[$1 + 1] = then; /* thenpart */
(*g_lingo->_currentScript)[$1 + 3] = end; } /* end, if cond fails */
| if cond tTHEN stmtlist end tELSE stmtlist end tEND tIF {
inst then, else1, end;
WRITE_LE_UINT32(&then, $4);
WRITE_LE_UINT32(&else1, $7);
WRITE_LE_UINT32(&end, $8);
(*g_lingo->_currentScript)[$1 + 1] = then; /* thenpart */
(*g_lingo->_currentScript)[$1 + 2] = else1; /* elsepart */
(*g_lingo->_currentScript)[$1 + 3] = end; } /* end, if cond fails */
;
expr: INT { g_lingo->code1(g_lingo->c_constpush); inst i; WRITE_LE_UINT32(&i, $1); $$ = g_lingo->code1(i); };
| VAR { g_lingo->code1(g_lingo->c_varpush); g_lingo->codeString($1->c_str()); $$ = g_lingo->code1(g_lingo->c_eval); delete $1; }
| asgn
| expr '+' expr { g_lingo->code1(g_lingo->c_add); }
| expr '-' expr { g_lingo->code1(g_lingo->c_sub); }
| expr '*' expr { g_lingo->code1(g_lingo->c_mul); }
| expr '/' expr { g_lingo->code1(g_lingo->c_div); }
| expr '>' expr { g_lingo->code1(g_lingo->c_gt); }
| expr '<' expr { g_lingo->code1(g_lingo->c_lt); }
| expr tNEQ expr { g_lingo->code1(g_lingo->c_neq); }
| expr tGE expr { g_lingo->code1(g_lingo->c_ge); }
| expr tLE expr { g_lingo->code1(g_lingo->c_le); }
| '+' expr %prec UNARY { $$ = $2; }
| '-' expr %prec UNARY { $$ = $2; g_lingo->code1(g_lingo->c_negate); }
| '(' expr ')' { $$ = $2; }
;
cond: expr { g_lingo->code1(STOP); }
| expr '=' expr { g_lingo->code2(g_lingo->c_eq, STOP); }
| '(' cond ')'
;
if: tIF { $$ = g_lingo->code1(g_lingo->c_ifcode); g_lingo->code3(STOP,STOP,STOP); }
;
end: /* nothing */ { g_lingo->code1(STOP); $$ = g_lingo->_currentScript->size(); }
;
stmtlist: /* nothing */ { $$ = g_lingo->_currentScript->size(); }
| stmtlist '\n'
| stmtlist stmt
;
func: tMCI STRING { g_lingo->code1(g_lingo->c_mci); g_lingo->codeString($2->c_str()); delete $2; }
| tMCIWAIT VAR { g_lingo->code1(g_lingo->c_mciwait); g_lingo->codeString($2->c_str()); delete $2; }
| tPUT expr { g_lingo->code1(g_lingo->c_printtop); }
| gotofunc
;
// go {to} {frame} whichFrame {of movie whichMovie}
// go {to} {frame "Open23" of} movie whichMovie
// go loop
// go next
// go previous
// go to {frame} whichFrame {of movie whichMovie}
// go to {frame whichFrame of} movie whichMovie
gotofunc: tGO tLOOP { g_lingo->code1(g_lingo->c_gotoloop); }
| tGO tNEXT { g_lingo->code1(g_lingo->c_gotonext); }
| tGO tPREVIOUS { g_lingo->code1(g_lingo->c_gotoprevious); }
| tGO gotoframe { g_lingo->code1(g_lingo->c_goto); g_lingo->codeString($2->c_str()); g_lingo->codeString(""); delete $2; }
| tGO gotoframe gotomovie { g_lingo->code1(g_lingo->c_goto); g_lingo->codeString($2->c_str()); g_lingo->codeString($3->c_str()); delete $2; delete $3; }
| tGO gotomovie { g_lingo->code1(g_lingo->c_goto); g_lingo->codeString(""); g_lingo->codeString($2->c_str()); delete $2; }
;
gotoframe: tTO tFRAME STRING { $$ = $3; }
| tFRAME STRING { $$ = $2; }
| tTO STRING { $$ = $2; }
| STRING { $$ = $1; }
;
gotomovie: tOF tMOVIE STRING { $$ = $3; }
| tMOVIE STRING { $$ = $2; }
| tTO tMOVIE STRING { $$ = $3; }
;
// repeat while (expression = TRUE)
// statements
// end repeat
//
// repeat with index = start to end
// statements
// end repeat
//
// repeat with index = high down to low
// statements
// end repeat
//
// macro
//
// Special Note The macro keyword is retained in Director 3.0 to maintain compatibility
// with scripts developed under Version 2.0. When writing new scripts, or editing old
// scripts, you should use handlers instead of macros. (Handlers are defined with the on keyword.)
//
// Syntax:
//
// -- [comment]
// macro macroName [argument1] [, argument2]
// [, argument3]
// [statement1]
// [statement2]
//
// Keyword. Defines a macro. A macro is a multiple-line script defined
// in the Text window. Macros can accept arguments (inputs) and
// optionally return a result. Macros can call other macros and can be
// called from any other script or factory.
//
// The first line of a castmember in the Text window that contains a macro must be
// a comment (--). You can define more than one macro in a given text castmember.
// The macro definition ends where the next macro (or factory) begins.
//
// See also:
// on keyword
%%
|
