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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();
using namespace Director;
void yyerror(char *s) {
g_lingo->_hadError = true;
error("%s at line %d col %d", s, g_lingo->_linenumber, g_lingo->_colnumber);
}
%}
%union {
Common::String *s;
int i;
double f;
int e[2]; // Entity + field
int code;
int narg; /* number of arguments */
}
%token CASTREF UNARY VOID VAR
%token<i> INT
%token<e> THEENTITY THEENTITYWITHID
%token<f> FLOAT
%token<s> BLTIN BLTINNOARGS ID STRING HANDLER
%token tDOWN tELSE tNLELSIF tEND tEXIT tFRAME tGLOBAL tGO tIF tINTO tLOOP tMACRO
%token tMCI tMCIWAIT tMOVIE tNEXT tOF tPREVIOUS tPUT tREPEAT tSET tTHEN tTO tWHEN
%token tWITH tWHILE tNLELSE tFACTORY tMETHOD
%token tGE tLE tGT tLT tEQ tNEQ tAND tOR tNOT
%token tCONCAT tCONTAINS tSTARTS
%type<code> asgn begin elseif elsestmtoneliner end expr if repeatwhile repeatwith stmtlist
%type<s> gotoframe gotomovie
%type<narg> argdef arglist
%right '='
%left '+' '-'
%left '*' '/' '%'
%right UNARY
%%
program: program nl programline
| programline
| error '\n' { yyerrok; }
;
nl: '\n' {
g_lingo->_linenumber++;
g_lingo->_colnumber = 1;
}
programline: /* empty */
| defn
| func
| macro
| asgn { g_lingo->code1(g_lingo->c_xpop); }
| stmt
;
asgn: tPUT expr tINTO ID {
g_lingo->code1(g_lingo->c_varpush);
g_lingo->codeString($4->c_str());
g_lingo->code1(g_lingo->c_assign);
$$ = $2;
delete $4; }
| tSET ID '=' expr {
g_lingo->code1(g_lingo->c_varpush);
g_lingo->codeString($2->c_str());
g_lingo->code1(g_lingo->c_assign);
$$ = $4;
delete $2; }
| tSET THEENTITY '=' expr {
g_lingo->code2(g_lingo->c_constpush, 0); // Put dummy id
g_lingo->code1(g_lingo->c_theentityassign);
inst e = 0, f = 0;
WRITE_UINT32(&e, $2[0]);
WRITE_UINT32(&f, $2[1]);
g_lingo->code2(e, f);
$$ = $4; }
| tSET THEENTITYWITHID expr '=' expr {
g_lingo->code1(g_lingo->c_swap);
g_lingo->code1(g_lingo->c_theentityassign);
inst e = 0, f = 0;
WRITE_UINT32(&e, $2[0]);
WRITE_UINT32(&f, $2[1]);
g_lingo->code2(e, f);
$$ = $5; }
| tSET ID tTO expr {
g_lingo->code1(g_lingo->c_varpush);
g_lingo->codeString($2->c_str());
g_lingo->code1(g_lingo->c_assign);
$$ = $4;
delete $2; }
| tSET THEENTITY tTO expr {
g_lingo->code2(g_lingo->c_constpush, 0); // Put dummy id
g_lingo->code1(g_lingo->c_theentityassign);
inst e = 0, f = 0;
WRITE_UINT32(&e, $2[0]);
WRITE_UINT32(&f, $2[1]);
g_lingo->code2(e, f);
$$ = $4; }
| tSET THEENTITYWITHID expr tTO expr {
g_lingo->code1(g_lingo->c_swap);
g_lingo->code1(g_lingo->c_theentityassign);
inst e = 0, f = 0;
WRITE_UINT32(&e, $2[0]);
WRITE_UINT32(&f, $2[1]);
g_lingo->code2(e, f);
$$ = $5; }
;
stmtoneliner: expr { g_lingo->code1(g_lingo->c_xpop); }
| func
;
stmt: stmtoneliner
| ifstmt
// repeat while (expression = TRUE)
// statements
// end repeat
//
| repeatwhile '(' cond ')' stmtlist end tEND tREPEAT {
inst body = 0, end = 0;
WRITE_UINT32(&body, $5);
WRITE_UINT32(&end, $6);
(*g_lingo->_currentScript)[$1 + 1] = body; /* body of loop */
(*g_lingo->_currentScript)[$1 + 2] = end; } /* end, if cond fails */
;
// repeat with index = start to end
// statements
// end repeat
//
| repeatwith '=' expr end tTO expr end stmtlist end tEND tREPEAT {
inst init = 0, finish = 0, body = 0, end = 0, inc = 0;
WRITE_UINT32(&init, $3);
WRITE_UINT32(&finish, $6);
WRITE_UINT32(&body, $8);
WRITE_UINT32(&end, $9);
WRITE_UINT32(&inc, 1);
(*g_lingo->_currentScript)[$1 + 1] = init; /* initial count value */
(*g_lingo->_currentScript)[$1 + 2] = finish;/* final count value */
(*g_lingo->_currentScript)[$1 + 3] = body; /* body of loop */
(*g_lingo->_currentScript)[$1 + 4] = inc; /* increment */
(*g_lingo->_currentScript)[$1 + 5] = end; } /* end, if cond fails */
// repeat with index = high down to low
// statements
// end repeat
//
| repeatwith '=' expr end tDOWN tTO expr end stmtlist end tEND tREPEAT {
inst init = 0, finish = 0, body = 0, end = 0, inc = 0;
WRITE_UINT32(&init, $3);
WRITE_UINT32(&finish, $7);
WRITE_UINT32(&body, $9);
WRITE_UINT32(&end, $10);
WRITE_UINT32(&inc, -1);
(*g_lingo->_currentScript)[$1 + 1] = init; /* initial count value */
(*g_lingo->_currentScript)[$1 + 2] = finish;/* final count value */
(*g_lingo->_currentScript)[$1 + 3] = body; /* body of loop */
(*g_lingo->_currentScript)[$1 + 4] = inc; /* increment */
(*g_lingo->_currentScript)[$1 + 5] = end; } /* end, if cond fails */
| tWHEN ID tTHEN expr {
g_lingo->code1(g_lingo->c_ifcode);
}
;
ifstmt: if cond tTHEN nl stmtlist end tEND tIF {
inst then = 0, end = 0;
WRITE_UINT32(&then, $5);
WRITE_UINT32(&end, $6);
(*g_lingo->_currentScript)[$1 + 1] = then; /* thenpart */
(*g_lingo->_currentScript)[$1 + 3] = end; /* end, if cond fails */
g_lingo->processIf(0, 0); }
| if cond tTHEN nl stmtlist end tNLELSE stmtlist end tEND tIF {
inst then = 0, else1 = 0, end = 0;
WRITE_UINT32(&then, $5);
WRITE_UINT32(&else1, $8);
WRITE_UINT32(&end, $9);
(*g_lingo->_currentScript)[$1 + 1] = then; /* thenpart */
(*g_lingo->_currentScript)[$1 + 2] = else1; /* elsepart */
(*g_lingo->_currentScript)[$1 + 3] = end; /* end, if cond fails */
g_lingo->processIf(0, 0); }
| if cond tTHEN nl stmtlist end begin elseifstmt end tEND tIF {
inst then = 0, else1 = 0, end = 0;
WRITE_UINT32(&then, $5);
WRITE_UINT32(&else1, $7);
WRITE_UINT32(&end, $9);
(*g_lingo->_currentScript)[$1 + 1] = then; /* thenpart */
(*g_lingo->_currentScript)[$1 + 2] = else1; /* elsepart */
(*g_lingo->_currentScript)[$1 + 3] = end; /* end, if cond fails */
g_lingo->processIf(0, $9); }
| if cond tTHEN begin stmtoneliner end {
inst then = 0, else1 = 0, end = 0;
WRITE_UINT32(&then, $4);
WRITE_UINT32(&else1, 0);
WRITE_UINT32(&end, $6);
(*g_lingo->_currentScript)[$1 + 1] = then; /* thenpart */
(*g_lingo->_currentScript)[$1 + 2] = else1; /* elsepart */
(*g_lingo->_currentScript)[$1 + 3] = end; /* end, if cond fails */
g_lingo->processIf(0, 0); }
| if cond tTHEN begin stmtoneliner end tNLELSE begin stmtoneliner end {
inst then = 0, else1 = 0, end = 0;
WRITE_UINT32(&then, $4);
WRITE_UINT32(&else1, $8);
WRITE_UINT32(&end, $10);
(*g_lingo->_currentScript)[$1 + 1] = then; /* thenpart */
(*g_lingo->_currentScript)[$1 + 2] = else1; /* elsepart */
(*g_lingo->_currentScript)[$1 + 3] = end; /* end, if cond fails */
g_lingo->processIf(0, 0); }
| if cond tTHEN begin stmtoneliner end elseifstmtoneliner end elsestmtoneliner end {
inst then = 0, else1 = 0, end = 0;
WRITE_UINT32(&then, $4);
WRITE_UINT32(&else1, $6);
WRITE_UINT32(&end, $10);
(*g_lingo->_currentScript)[$1 + 1] = then; /* thenpart */
(*g_lingo->_currentScript)[$1 + 2] = else1; /* elsepart */
(*g_lingo->_currentScript)[$1 + 3] = end; /* end, if cond fails */
g_lingo->processIf(0, $10); }
;
elsestmtoneliner: /* nothing */ { $$ = 0; }
| tNLELSE begin stmtoneliner { $$ = $2; }
;
elseifstmt: elseifstmt elseifstmt1
| elseifstmt1
;
elseifstmtoneliner: elseifstmtoneliner elseifstmtoneliner1
| elseifstmtoneliner1
;
elseifstmtoneliner1: elseif cond tTHEN begin stmt end {
inst then = 0;
WRITE_UINT32(&then, $4);
(*g_lingo->_currentScript)[$1 + 1] = then; /* thenpart */
g_lingo->codeLabel($1); }
;
elseifstmt1: elseifstmtoneliner
| elseif cond tTHEN stmtlist end {
inst then = 0;
WRITE_UINT32(&then, $4);
(*g_lingo->_currentScript)[$1 + 1] = then; /* thenpart */
g_lingo->codeLabel($1); }
;
cond: expr { g_lingo->code1(STOP); }
| expr '=' expr { g_lingo->code2(g_lingo->c_eq, STOP); }
| '(' cond ')'
;
repeatwhile: tREPEAT tWHILE { $$ = g_lingo->code3(g_lingo->c_repeatwhilecode, STOP, STOP); }
;
repeatwith: tREPEAT tWITH ID {
$$ = g_lingo->code3(g_lingo->c_repeatwithcode, STOP, STOP);
g_lingo->code3(STOP, STOP, STOP);
g_lingo->codeString($3->c_str());
delete $3; }
;
if: tIF {
$$ = g_lingo->code1(g_lingo->c_ifcode);
g_lingo->code3(STOP, STOP, STOP);
g_lingo->code1(0); // Do not skip end
g_lingo->codeLabel(0); } // Mark beginning of the if() statement
;
elseif: tNLELSIF {
inst skipEnd;
WRITE_UINT32(&skipEnd, 1); // We have to skip end to avoid multiple executions
$$ = g_lingo->code1(g_lingo->c_ifcode);
g_lingo->code3(STOP, STOP, STOP);
g_lingo->code1(skipEnd); }
;
begin: /* nothing */ { $$ = g_lingo->_currentScript->size(); }
;
end: /* nothing */ { g_lingo->code1(STOP); $$ = g_lingo->_currentScript->size(); }
;
stmtlist: /* nothing */ { $$ = g_lingo->_currentScript->size(); }
| stmtlist nl
| stmtlist stmt
;
expr: INT {
$$ = g_lingo->code1(g_lingo->c_constpush);
inst i = 0;
WRITE_UINT32(&i, $1);
g_lingo->code1(i); }
| FLOAT {
$$ = g_lingo->code1(g_lingo->c_fconstpush);
g_lingo->codeFloat($1); }
| STRING {
$$ = g_lingo->code1(g_lingo->c_stringpush);
g_lingo->codeString($1->c_str()); }
| BLTIN '(' arglist ')' {
if ($3 != g_lingo->_builtins[*$1]->nargs)
error("Built-in function %s expects %d arguments but got %d", $1->c_str(), g_lingo->_builtins[*$1]->nargs, $3);
$$ = g_lingo->code1(g_lingo->_builtins[*$1]->func);
delete $1; }
| BLTINNOARGS {
$$ = g_lingo->code1(g_lingo->_builtins[*$1]->func);
delete $1; }
| ID '(' arglist ')' {
$$ = g_lingo->code1(g_lingo->c_call);
g_lingo->codeString($1->c_str());
inst numpar = 0;
WRITE_UINT32(&numpar, $3);
g_lingo->code1(numpar);
delete $1; }
| ID {
$$ = g_lingo->codeId(*$1);
delete $1; }
| THEENTITY {
$$ = g_lingo->code2(g_lingo->c_constpush, 0); // Put dummy id
g_lingo->code1(g_lingo->c_theentitypush);
inst e = 0, f = 0;
WRITE_UINT32(&e, $1[0]);
WRITE_UINT32(&f, $1[1]);
g_lingo->code2(e, f); }
| THEENTITYWITHID expr {
$$ = g_lingo->code1(g_lingo->c_theentitypush);
inst e = 0, f = 0;
WRITE_UINT32(&e, $1[0]);
WRITE_UINT32(&f, $1[1]);
g_lingo->code2(e, f); }
| asgn
| expr '+' expr { g_lingo->code1(g_lingo->c_add); }
| expr '-' expr { g_lingo->code1(g_lingo->c_sub); }
| expr '*' expr { g_lingo->code1(g_lingo->c_mul); }
| expr '/' expr { g_lingo->code1(g_lingo->c_div); }
| expr '>' expr { g_lingo->code1(g_lingo->c_gt); }
| expr '<' expr { g_lingo->code1(g_lingo->c_lt); }
| expr tNEQ expr { g_lingo->code1(g_lingo->c_neq); }
| expr tGE expr { g_lingo->code1(g_lingo->c_ge); }
| expr tLE expr { g_lingo->code1(g_lingo->c_le); }
| expr tAND expr { g_lingo->code1(g_lingo->c_and); }
| expr tOR expr { g_lingo->code1(g_lingo->c_or); }
| tNOT expr %prec UNARY { g_lingo->code1(g_lingo->c_not); }
| expr '&' expr { g_lingo->code1(g_lingo->c_ampersand); }
| expr tCONCAT expr { g_lingo->code1(g_lingo->c_concat); }
| expr tCONTAINS expr { g_lingo->code1(g_lingo->c_contains); }
| expr tSTARTS expr { g_lingo->code1(g_lingo->c_starts); }
| '+' expr %prec UNARY { $$ = $2; }
| '-' expr %prec UNARY { $$ = $2; g_lingo->code1(g_lingo->c_negate); }
| '(' expr ')' { $$ = $2; }
;
func: tMCI STRING { g_lingo->code1(g_lingo->c_mci); g_lingo->codeString($2->c_str()); delete $2; }
| tMCIWAIT ID { 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
| tEXIT { g_lingo->code2(g_lingo->c_constpush, (inst)0); // Push fake value on stack
g_lingo->code1(g_lingo->c_procret); }
| tGLOBAL globallist
;
globallist: ID { g_lingo->code1(g_lingo->c_global); g_lingo->codeString($1->c_str()); delete $1; }
| globallist ',' ID { g_lingo->code1(g_lingo->c_global); g_lingo->codeString($3->c_str()); delete $3; }
;
// 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 { $$ = $3; }
;
// macro
//
// Special Note The macro keyword is retained in Director 3.0 to maintain compatibility
// with scripts developed under Version 2.0. When writing new scripts, or editing old
// scripts, you should use handlers instead of macros. (Handlers are defined with the on keyword.)
//
// Syntax:
//
// -- [comment]
// macro macroName [argument1] [, argument2]
// [, argument3]
// [statement1]
// [statement2]
//
// Keyword. Defines a macro. A macro is a multiple-line script defined
// in the Text window. Macros can accept arguments (inputs) and
// optionally return a result. Macros can call other macros and can be
// called from any other script or factory.
//
// The first line of a castmember in the Text window that contains a macro must be
// a comment (--). You can define more than one macro in a given text castmember.
// The macro definition ends where the next macro (or factory) begins.
//
// See also:
// on keyword
defn: tMACRO ID { g_lingo->_indef = true; }
begin argdef nl argstore stmtlist {
g_lingo->code2(g_lingo->c_constpush, (inst)0); // Push fake value on stack
g_lingo->code1(g_lingo->c_procret);
g_lingo->define(*$2, $4, $5);
g_lingo->_indef = false; }
| tFACTORY ID {
g_lingo->codeFactory(*$2);
}
| tMETHOD ID { g_lingo->_indef = true; }
begin argdef nl argstore stmtlist {
g_lingo->code2(g_lingo->c_constpush, (inst)0); // Push fake value on stack
g_lingo->code1(g_lingo->c_procret);
g_lingo->define(*$2, $4, $5, &g_lingo->_currentFactory);
g_lingo->_indef = false; } ;
argdef: /* nothing */ { $$ = 0; }
| ID { g_lingo->codeArg($1); $$ = 1; }
| argdef ',' ID { g_lingo->codeArg($3); $$ = $1 + 1; }
| argdef nl ',' ID { g_lingo->codeArg($4); $$ = $1 + 1; }
;
argstore: /* nothing */ { g_lingo->codeArgStore(); }
;
macro: ID begin arglist {
g_lingo->code1(g_lingo->c_call);
g_lingo->codeString($1->c_str());
inst numpar = 0;
WRITE_UINT32(&numpar, $3);
g_lingo->code1(numpar); }
;
arglist: /* nothing */ { $$ = 0; }
| expr { $$ = 1; }
| arglist ',' expr { $$ = $1 + 1; }
;
%%
|