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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 3 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, see <http://www.gnu.org/licenses/>.
*
*/
// 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.
%require "3.6"
%defines "engines/private/tokens.h"
%output "engines/private/grammar.cpp"
%define api.prefix {PRIVATE_}
%{
#include "private/private.h"
#include "private/grammar.h"
#undef yyerror
#define yyerror PRIVATE_xerror
#define code1(c1) code(c1);
#define code2(c1,c2) code(c1); code(c2)
#define code3(c1,c2,c3) code(c1); code(c2); code(c3)
using namespace Private;
using namespace Gen;
using namespace Settings;
extern int PRIVATE_lex();
//extern int PRIVATE_parse();
void PRIVATE_xerror(const char *str) {
}
int PRIVATE_wrap() {
return 1;
}
%}
%union {
Private::Symbol *sym; /* symbol table pointer */
int (**inst)(); /* machine instruction */
char *s; /* string value */
int *i; /* integer value */
int narg; /* auxiliary value to count function arguments */
}
%token<s> NAME
%token<sym> STRING NUM
%type <inst> body if startp cond end expr statements statement fcall value
%token LTE GTE NEQ EQ FALSETOK TRUETOK NULLTOK IFTOK ELSETOK RECT GOTOTOK DEBUGTOK EMITCODEONTOK EMITCODEOFFTOK RESETIDTOK DEFINETOK SETTINGTOK RANDOMTOK
%type<narg> params
%%
lines: line lines
| line
;
line: DEBUGTOK '{' debug '}' { /* Not used in the game */ }
| EMITCODEONTOK { /* Unclear what this is */ }
| EMITCODEOFFTOK { /* Unclear what this is */ }
| RESETIDTOK { /* Unclear what this is */ }
| DEFINETOK NAME '{' define '}' { g_private->maps.installAll($NAME); }
| SETTINGTOK NAME '{' statements '}' { g_setts->save($NAME);
g_setts->init(); }
;
debug: /* nothing */
| NAME ',' debug
;
statements: /* nothing */ { $$ = g_vm->_progp; }
| statement statements
statement: GOTOTOK NAME ';' {
$$ = g_vm->_progp;
code2(strpush, (Inst) g_private->maps.constant(STRING, 0, $NAME));
code2(constpush, (Inst) g_private->maps.constant(NUM, 1, NULL));
code2(strpush, (Inst) g_private->maps.constant(STRING, 0, "goto"));
code1(funcpush);
}
| fcall ';' { $$ = $1; }
| if cond body end {
/* else-less if */
($1)[1] = (Inst)$3; /* thenpart */
($1)[3] = (Inst)$4;
} /* end, if cond fails */
| if cond body end ELSETOK body end {
/* if with else */
($1)[1] = (Inst)$3; /* thenpart */
($1)[2] = (Inst)$6; /* elsepart */
($1)[3] = (Inst)$7;
} /* end, if cond fails */
;
body: statement { $$ = $1; }
| '{' statements '}' { $$ = $2; }
;
end: /* nothing */ { code1(STOP); $$ = g_vm->_progp; }
;
if: IFTOK { $$ = code1(ifcode); code3(STOP, STOP, STOP); }
;
cond: '(' expr ')' { code1(STOP); $$ = $2; }
;
define: /* nothing */
| NAME ',' RECT '(' NUM ',' NUM ',' NUM ',' NUM ')' ',' define {
Common::Rect *r = new Common::Rect($5->u.val, $7->u.val, $9->u.val, $11->u.val);
assert(r->isValidRect());
g_private->maps.defineSymbol($NAME, r);
}
| NAME ',' RECT '(' NUM ',' NUM ',' NUM ',' NUM ')' {
Common::Rect *r = new Common::Rect($5->u.val, $7->u.val, $9->u.val, $11->u.val);
g_private->maps.defineSymbol($NAME, r);
}
| NAME ',' define { g_private->maps.defineSymbol($NAME, NULL); }
| NAME { g_private->maps.defineSymbol($NAME, NULL); }
;
fcall: GOTOTOK '(' NAME ')' {
$$ = g_vm->_progp;
code2(strpush, (Inst) g_private->maps.constant(STRING, 0, $NAME));
code2(constpush, (Inst) g_private->maps.constant(NUM, 1, NULL));
code2(strpush, (Inst) g_private->maps.constant(STRING, 0, "goto"));
code1(funcpush);
}
| RECT '(' NUM ',' NUM ',' NUM ',' NUM ')' { $$ = g_vm->_progp; }
| NAME '(' startp params ')' {
$$ = $startp;
code2(constpush, (Inst) g_private->maps.constant(NUM, $params, NULL));
code2(strpush, (Inst) g_private->maps.constant(STRING, 0, $NAME));
code1(funcpush);
}
;
startp: /*nothing*/ { $$ = g_vm->_progp; }
;
params: /* nothing */ { $$ = 0; }
| fcall ',' params { $$ = $3 + 1; }
| expr ',' params { $$ = $3 + 1; }
| expr { $$ = 1; }
| fcall { $$ = 1; }
;
value: NULLTOK { code2(constpush, (Inst) g_private->maps.constant(NUM, 0, NULL)); }
| FALSETOK { code2(constpush, (Inst) g_private->maps.constant(NUM, 0, NULL)); }
| TRUETOK { code2(constpush, (Inst) g_private->maps.constant(NUM, 1, NULL)); }
| NUM { code2(constpush, (Inst)$NUM); }
| STRING { code2(strpush, (Inst)$STRING); }
| NAME { code1(varpush); code1((Inst) g_private->maps.lookupName($NAME)); code1(eval); }
;
expr: value { $$ = $1; }
| '!' value { code1(negate); $$ = $2; }
| value EQ value { code1(eq); }
| value NEQ value { code1(ne); }
| value '+' value { code1(add); }
| value '<' value { code1(lt); }
| value '>' value { code1(gt); }
| value LTE value { code1(le); }
| value GTE value { code1(ge); }
| value '+' { $$ = $1; } // unclear what it should do
| RANDOMTOK '(' NUM '%' ')' { code3(constpush, (Inst)$NUM, randbool); }
;
|
