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|
#ifndef lint
static const char yysccsid[] = "@(#)yaccpar 1.9 (Berkeley) 02/21/93";
#endif
#include <stdlib.h>
#include <string.h>
#define YYBYACC 1
#define YYMAJOR 1
#define YYMINOR 9
#define YYPATCH 20091027
#define YYEMPTY (-1)
#define yyclearin (yychar = YYEMPTY)
#define yyerrok (yyerrflag = 0)
#define YYRECOVERING() (yyerrflag != 0)
/* compatibility with bison */
#ifdef YYPARSE_PARAM
/* compatibility with FreeBSD */
#ifdef YYPARSE_PARAM_TYPE
#define YYPARSE_DECL() yyparse(YYPARSE_PARAM_TYPE YYPARSE_PARAM)
#else
#define YYPARSE_DECL() yyparse(void *YYPARSE_PARAM)
#endif
#else
#define YYPARSE_DECL() yyparse(void)
#endif /* YYPARSE_PARAM */
extern int YYPARSE_DECL();
static int yygrowstack(void);
#define YYPREFIX "yy"
/* $NetBSD: arith.y,v 1.17 2003/09/17 17:33:36 jmmv Exp $ */
/*-
* Copyright (c) 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Kenneth Almquist.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if 0
#ifndef lint
static char sccsid[] = "@(#)arith.y 8.3 (Berkeley) 5/4/95";
#else
__RCSID("$NetBSD: arith.y,v 1.17 2003/09/17 17:33:36 jmmv Exp $");
#endif /* not lint */
#endif
#include <stdlib.h>
#include "expand.h"
#include "shell.h"
#include "error.h"
#include "output.h"
#include "memalloc.h"
#include "shinstance.h"
shinstance *arith_psh;
const char *arith_buf, *arith_startbuf;
void yyerror(const char *);
#ifdef TESTARITH
int main(int , char *[]);
int error(char *);
#else
# undef malloc
# define malloc(cb) sh_malloc(NULL, (cb))
# undef realloc
# define realloc(pv,cb) sh_realloc(NULL, (pv), (cb))
# undef free
# define free(pv) sh_free(NULL, (pv))
#endif
#define ARITH_NUM 257
#define ARITH_LPAREN 258
#define ARITH_RPAREN 259
#define ARITH_OR 260
#define ARITH_AND 261
#define ARITH_BOR 262
#define ARITH_BXOR 263
#define ARITH_BAND 264
#define ARITH_EQ 265
#define ARITH_NE 266
#define ARITH_LT 267
#define ARITH_GT 268
#define ARITH_GE 269
#define ARITH_LE 270
#define ARITH_LSHIFT 271
#define ARITH_RSHIFT 272
#define ARITH_ADD 273
#define ARITH_SUB 274
#define ARITH_MUL 275
#define ARITH_DIV 276
#define ARITH_REM 277
#define ARITH_UNARYMINUS 278
#define ARITH_UNARYPLUS 279
#define ARITH_NOT 280
#define ARITH_BNOT 281
#define YYERRCODE 256
static const short yylhs[] = { -1,
0, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1,
};
static const short yylen[] = { 2,
1, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
2, 2, 2, 2, 1,
};
static const short yydefred[] = { 0,
25, 0, 0, 0, 0, 0, 0, 0, 0, 24,
23, 21, 22, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 2, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 18, 19, 20,
};
static const short yydgoto[] = { 7,
8,
};
static const short yysindex[] = { -255,
0, -255, -255, -255, -255, -255, 0, -67, -85, 0,
0, 0, 0, -255, -255, -255, -255, -255, -255, -255,
-255, -255, -255, -255, -255, -255, -255, -255, -255, -255,
-255, 0, -50, -34, -19, 141, -261, -233, -233, -223,
-223, -223, -223, -253, -253, -248, -248, 0, 0, 0,
};
static const short yyrindex[] = { 0,
0, 0, 0, 0, 0, 0, 0, 30, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 143, 140, 136, 131, 125, 109, 117, 61,
73, 85, 97, 33, 47, 1, 17, 0, 0, 0,
};
static const short yygindex[] = { 0,
142,
};
#define YYTABLESIZE 418
static const short yytable[] = { 0,
16, 1, 2, 19, 20, 21, 22, 23, 24, 25,
26, 27, 28, 29, 30, 31, 17, 3, 4, 27,
28, 29, 30, 31, 5, 6, 29, 30, 31, 1,
0, 0, 14, 21, 22, 23, 24, 25, 26, 27,
28, 29, 30, 31, 0, 0, 15, 25, 26, 27,
28, 29, 30, 31, 0, 0, 0, 0, 0, 0,
11, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 9, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 10, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 12, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 8, 0,
0, 0, 0, 0, 0, 0, 13, 0, 0, 0,
0, 0, 0, 0, 7, 0, 0, 0, 0, 0,
6, 0, 0, 0, 0, 5, 0, 0, 0, 4,
0, 0, 3, 9, 10, 11, 12, 13, 0, 0,
0, 0, 0, 0, 0, 33, 34, 35, 36, 37,
38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
48, 49, 50, 32, 14, 15, 16, 17, 18, 19,
20, 21, 22, 23, 24, 25, 26, 27, 28, 29,
30, 31, 14, 15, 16, 17, 18, 19, 20, 21,
22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
15, 16, 17, 18, 19, 20, 21, 22, 23, 24,
25, 26, 27, 28, 29, 30, 31, 16, 17, 18,
19, 20, 21, 22, 23, 24, 25, 26, 27, 28,
29, 30, 31, 17, 18, 19, 20, 21, 22, 23,
24, 25, 26, 27, 28, 29, 30, 31, 0, 16,
16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
16, 16, 16, 16, 16, 17, 17, 17, 17, 17,
17, 17, 17, 17, 17, 17, 17, 17, 17, 17,
17, 14, 14, 14, 14, 14, 14, 14, 14, 14,
14, 14, 14, 14, 14, 15, 15, 15, 15, 15,
15, 15, 15, 15, 15, 15, 15, 15, 15, 11,
11, 11, 11, 11, 11, 11, 11, 11, 11, 11,
11, 9, 9, 9, 9, 9, 9, 9, 9, 9,
9, 9, 9, 10, 10, 10, 10, 10, 10, 10,
10, 10, 10, 10, 10, 12, 12, 12, 12, 12,
12, 12, 12, 12, 12, 12, 12, 8, 8, 8,
8, 8, 8, 8, 8, 13, 13, 13, 13, 13,
13, 13, 13, 7, 7, 7, 7, 7, 7, 6,
6, 6, 6, 6, 5, 5, 5, 5, 4, 4,
4, 3, 3, 0, 18, 19, 20, 21, 22, 23,
24, 25, 26, 27, 28, 29, 30, 31,
};
static const short yycheck[] = { -1,
0, 257, 258, 265, 266, 267, 268, 269, 270, 271,
272, 273, 274, 275, 276, 277, 0, 273, 274, 273,
274, 275, 276, 277, 280, 281, 275, 276, 277, 0,
-1, -1, 0, 267, 268, 269, 270, 271, 272, 273,
274, 275, 276, 277, -1, -1, 0, 271, 272, 273,
274, 275, 276, 277, -1, -1, -1, -1, -1, -1,
0, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, 0, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, 0, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, 0, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, 0, -1,
-1, -1, -1, -1, -1, -1, 0, -1, -1, -1,
-1, -1, -1, -1, 0, -1, -1, -1, -1, -1,
0, -1, -1, -1, -1, 0, -1, -1, -1, 0,
-1, -1, 0, 2, 3, 4, 5, 6, -1, -1,
-1, -1, -1, -1, -1, 14, 15, 16, 17, 18,
19, 20, 21, 22, 23, 24, 25, 26, 27, 28,
29, 30, 31, 259, 260, 261, 262, 263, 264, 265,
266, 267, 268, 269, 270, 271, 272, 273, 274, 275,
276, 277, 260, 261, 262, 263, 264, 265, 266, 267,
268, 269, 270, 271, 272, 273, 274, 275, 276, 277,
261, 262, 263, 264, 265, 266, 267, 268, 269, 270,
271, 272, 273, 274, 275, 276, 277, 262, 263, 264,
265, 266, 267, 268, 269, 270, 271, 272, 273, 274,
275, 276, 277, 263, 264, 265, 266, 267, 268, 269,
270, 271, 272, 273, 274, 275, 276, 277, -1, 259,
260, 261, 262, 263, 264, 265, 266, 267, 268, 269,
270, 271, 272, 273, 274, 259, 260, 261, 262, 263,
264, 265, 266, 267, 268, 269, 270, 271, 272, 273,
274, 259, 260, 261, 262, 263, 264, 265, 266, 267,
268, 269, 270, 271, 272, 259, 260, 261, 262, 263,
264, 265, 266, 267, 268, 269, 270, 271, 272, 259,
260, 261, 262, 263, 264, 265, 266, 267, 268, 269,
270, 259, 260, 261, 262, 263, 264, 265, 266, 267,
268, 269, 270, 259, 260, 261, 262, 263, 264, 265,
266, 267, 268, 269, 270, 259, 260, 261, 262, 263,
264, 265, 266, 267, 268, 269, 270, 259, 260, 261,
262, 263, 264, 265, 266, 259, 260, 261, 262, 263,
264, 265, 266, 259, 260, 261, 262, 263, 264, 259,
260, 261, 262, 263, 259, 260, 261, 262, 259, 260,
261, 259, 260, -1, 264, 265, 266, 267, 268, 269,
270, 271, 272, 273, 274, 275, 276, 277,
};
#define YYFINAL 7
#ifndef YYDEBUG
#define YYDEBUG 0
#endif
#define YYMAXTOKEN 281
#if YYDEBUG
static const char *yyname[] = {
"end-of-file",0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,"ARITH_NUM","ARITH_LPAREN",
"ARITH_RPAREN","ARITH_OR","ARITH_AND","ARITH_BOR","ARITH_BXOR","ARITH_BAND",
"ARITH_EQ","ARITH_NE","ARITH_LT","ARITH_GT","ARITH_GE","ARITH_LE",
"ARITH_LSHIFT","ARITH_RSHIFT","ARITH_ADD","ARITH_SUB","ARITH_MUL","ARITH_DIV",
"ARITH_REM","ARITH_UNARYMINUS","ARITH_UNARYPLUS","ARITH_NOT","ARITH_BNOT",
};
static const char *yyrule[] = {
"$accept : exp",
"exp : expr",
"expr : ARITH_LPAREN expr ARITH_RPAREN",
"expr : expr ARITH_OR expr",
"expr : expr ARITH_AND expr",
"expr : expr ARITH_BOR expr",
"expr : expr ARITH_BXOR expr",
"expr : expr ARITH_BAND expr",
"expr : expr ARITH_EQ expr",
"expr : expr ARITH_GT expr",
"expr : expr ARITH_GE expr",
"expr : expr ARITH_LT expr",
"expr : expr ARITH_LE expr",
"expr : expr ARITH_NE expr",
"expr : expr ARITH_LSHIFT expr",
"expr : expr ARITH_RSHIFT expr",
"expr : expr ARITH_ADD expr",
"expr : expr ARITH_SUB expr",
"expr : expr ARITH_MUL expr",
"expr : expr ARITH_DIV expr",
"expr : expr ARITH_REM expr",
"expr : ARITH_NOT expr",
"expr : ARITH_BNOT expr",
"expr : ARITH_SUB expr",
"expr : ARITH_ADD expr",
"expr : ARITH_NUM",
};
#endif
#ifndef YYSTYPE
typedef int YYSTYPE;
#endif
#if YYDEBUG
#include <stdio.h>
#endif
/* define the initial stack-sizes */
#ifdef YYSTACKSIZE
#undef YYMAXDEPTH
#define YYMAXDEPTH YYSTACKSIZE
#else
#ifdef YYMAXDEPTH
#define YYSTACKSIZE YYMAXDEPTH
#else
#define YYSTACKSIZE 500
#define YYMAXDEPTH 500
#endif
#endif
#define YYINITSTACKSIZE 500
int yydebug;
int yynerrs;
int yyerrflag;
int yychar;
short *yyssp;
YYSTYPE *yyvsp;
YYSTYPE yyval;
YYSTYPE yylval;
/* variables for the parser stack */
static short *yyss;
static short *yysslim;
static YYSTYPE *yyvs;
static unsigned yystacksize;
int
arith(shinstance *psh, const char *s)
{
long result;
INTOFF;
/* todo lock */
arith_psh = psh;
arith_buf = arith_startbuf = s;
result = yyparse();
arith_lex_reset(); /* reprime lex */
arith_psh = NULL;
/* todo unlock */
INTON;
return (result);
}
/*
* The exp(1) builtin.
*/
int
expcmd(shinstance *psh, int argc, char **argv)
{
const char *p;
char *concat;
char **ap;
long i;
if (argc > 1) {
p = argv[1];
if (argc > 2) {
/*
* concatenate arguments
*/
STARTSTACKSTR(psh, concat);
ap = argv + 2;
for (;;) {
while (*p)
STPUTC(psh, *p++, concat);
if ((p = *ap++) == NULL)
break;
STPUTC(psh, ' ', concat);
}
STPUTC(psh, '\0', concat);
p = grabstackstr(psh, concat);
}
} else
p = "";
i = arith(psh, p);
out1fmt(psh, "%ld\n", i);
return (! i);
}
/*************************/
#ifdef TEST_ARITH
#include <stdio.h>
main(argc, argv)
char *argv[];
{
printf("%d\n", exp(argv[1]));
}
error(s)
char *s;
{
fprintf(stderr, "exp: %s\n", s);
exit(1);
}
#endif
void
yyerror(const char *s)
{
shinstance *psh = arith_psh;
#ifndef YYBISON /* yyerrok references yyerrstatus which is a local variable in yyparse().*/
yyerrok;
#endif
yyclearin;
arith_lex_reset(); /* reprime lex */
/** @todo unlock */
error(psh, "arithmetic expression: %s: \"%s\"", s, arith_startbuf);
/* NOTREACHED */
}
/* allocate initial stack or double stack size, up to YYMAXDEPTH */
static int yygrowstack(void)
{
int i;
unsigned newsize;
short *newss;
YYSTYPE *newvs;
if ((newsize = yystacksize) == 0)
newsize = YYINITSTACKSIZE;
else if (newsize >= YYMAXDEPTH)
return -1;
else if ((newsize *= 2) > YYMAXDEPTH)
newsize = YYMAXDEPTH;
i = yyssp - yyss;
newss = (yyss != 0)
? (short *)realloc(yyss, newsize * sizeof(*newss))
: (short *)malloc(newsize * sizeof(*newss));
if (newss == 0)
return -1;
yyss = newss;
yyssp = newss + i;
newvs = (yyvs != 0)
? (YYSTYPE *)realloc(yyvs, newsize * sizeof(*newvs))
: (YYSTYPE *)malloc(newsize * sizeof(*newvs));
if (newvs == 0)
return -1;
yyvs = newvs;
yyvsp = newvs + i;
yystacksize = newsize;
yysslim = yyss + newsize - 1;
return 0;
}
#define YYABORT goto yyabort
#define YYREJECT goto yyabort
#define YYACCEPT goto yyaccept
#define YYERROR goto yyerrlab
int
YYPARSE_DECL()
{
int yym, yyn, yystate;
#if YYDEBUG
const char *yys;
if ((yys = getenv("YYDEBUG")) != 0)
{
yyn = *yys;
if (yyn >= '0' && yyn <= '9')
yydebug = yyn - '0';
}
#endif
yynerrs = 0;
yyerrflag = 0;
yychar = YYEMPTY;
yystate = 0;
if (yyss == NULL && yygrowstack()) goto yyoverflow;
yyssp = yyss;
yyvsp = yyvs;
yystate = 0;
*yyssp = 0;
yyloop:
if ((yyn = yydefred[yystate]) != 0) goto yyreduce;
if (yychar < 0)
{
if ((yychar = yylex()) < 0) yychar = 0;
#if YYDEBUG
if (yydebug)
{
yys = 0;
if (yychar <= YYMAXTOKEN) yys = yyname[yychar];
if (!yys) yys = "illegal-symbol";
printf("%sdebug: state %d, reading %d (%s)\n",
YYPREFIX, yystate, yychar, yys);
}
#endif
}
if ((yyn = yysindex[yystate]) && (yyn += yychar) >= 0 &&
yyn <= YYTABLESIZE && yycheck[yyn] == yychar)
{
#if YYDEBUG
if (yydebug)
printf("%sdebug: state %d, shifting to state %d\n",
YYPREFIX, yystate, yytable[yyn]);
#endif
if (yyssp >= yysslim && yygrowstack())
{
goto yyoverflow;
}
yystate = yytable[yyn];
*++yyssp = yytable[yyn];
*++yyvsp = yylval;
yychar = YYEMPTY;
if (yyerrflag > 0) --yyerrflag;
goto yyloop;
}
if ((yyn = yyrindex[yystate]) && (yyn += yychar) >= 0 &&
yyn <= YYTABLESIZE && yycheck[yyn] == yychar)
{
yyn = yytable[yyn];
goto yyreduce;
}
if (yyerrflag) goto yyinrecovery;
yyerror("syntax error");
goto yyerrlab;
yyerrlab:
++yynerrs;
yyinrecovery:
if (yyerrflag < 3)
{
yyerrflag = 3;
for (;;)
{
if ((yyn = yysindex[*yyssp]) && (yyn += YYERRCODE) >= 0 &&
yyn <= YYTABLESIZE && yycheck[yyn] == YYERRCODE)
{
#if YYDEBUG
if (yydebug)
printf("%sdebug: state %d, error recovery shifting\
to state %d\n", YYPREFIX, *yyssp, yytable[yyn]);
#endif
if (yyssp >= yysslim && yygrowstack())
{
goto yyoverflow;
}
yystate = yytable[yyn];
*++yyssp = yytable[yyn];
*++yyvsp = yylval;
goto yyloop;
}
else
{
#if YYDEBUG
if (yydebug)
printf("%sdebug: error recovery discarding state %d\n",
YYPREFIX, *yyssp);
#endif
if (yyssp <= yyss) goto yyabort;
--yyssp;
--yyvsp;
}
}
}
else
{
if (yychar == 0) goto yyabort;
#if YYDEBUG
if (yydebug)
{
yys = 0;
if (yychar <= YYMAXTOKEN) yys = yyname[yychar];
if (!yys) yys = "illegal-symbol";
printf("%sdebug: state %d, error recovery discards token %d (%s)\n",
YYPREFIX, yystate, yychar, yys);
}
#endif
yychar = YYEMPTY;
goto yyloop;
}
yyreduce:
#if YYDEBUG
if (yydebug)
printf("%sdebug: state %d, reducing by rule %d (%s)\n",
YYPREFIX, yystate, yyn, yyrule[yyn]);
#endif
yym = yylen[yyn];
if (yym)
yyval = yyvsp[1-yym];
else
memset(&yyval, 0, sizeof yyval);
switch (yyn)
{
case 1:
{
return (yyvsp[0]);
}
break;
case 2:
{ yyval = yyvsp[-1]; }
break;
case 3:
{ yyval = yyvsp[-2] ? yyvsp[-2] : yyvsp[0] ? yyvsp[0] : 0; }
break;
case 4:
{ yyval = yyvsp[-2] ? ( yyvsp[0] ? yyvsp[0] : 0 ) : 0; }
break;
case 5:
{ yyval = yyvsp[-2] | yyvsp[0]; }
break;
case 6:
{ yyval = yyvsp[-2] ^ yyvsp[0]; }
break;
case 7:
{ yyval = yyvsp[-2] & yyvsp[0]; }
break;
case 8:
{ yyval = yyvsp[-2] == yyvsp[0]; }
break;
case 9:
{ yyval = yyvsp[-2] > yyvsp[0]; }
break;
case 10:
{ yyval = yyvsp[-2] >= yyvsp[0]; }
break;
case 11:
{ yyval = yyvsp[-2] < yyvsp[0]; }
break;
case 12:
{ yyval = yyvsp[-2] <= yyvsp[0]; }
break;
case 13:
{ yyval = yyvsp[-2] != yyvsp[0]; }
break;
case 14:
{ yyval = yyvsp[-2] << yyvsp[0]; }
break;
case 15:
{ yyval = yyvsp[-2] >> yyvsp[0]; }
break;
case 16:
{ yyval = yyvsp[-2] + yyvsp[0]; }
break;
case 17:
{ yyval = yyvsp[-2] - yyvsp[0]; }
break;
case 18:
{ yyval = yyvsp[-2] * yyvsp[0]; }
break;
case 19:
{
if (yyvsp[0] == 0)
yyerror("division by zero");
yyval = yyvsp[-2] / yyvsp[0];
}
break;
case 20:
{
if (yyvsp[0] == 0)
yyerror("division by zero");
yyval = yyvsp[-2] % yyvsp[0];
}
break;
case 21:
{ yyval = !(yyvsp[0]); }
break;
case 22:
{ yyval = ~(yyvsp[0]); }
break;
case 23:
{ yyval = -(yyvsp[0]); }
break;
case 24:
{ yyval = yyvsp[0]; }
break;
}
yyssp -= yym;
yystate = *yyssp;
yyvsp -= yym;
yym = yylhs[yyn];
if (yystate == 0 && yym == 0)
{
#if YYDEBUG
if (yydebug)
printf("%sdebug: after reduction, shifting from state 0 to\
state %d\n", YYPREFIX, YYFINAL);
#endif
yystate = YYFINAL;
*++yyssp = YYFINAL;
*++yyvsp = yyval;
if (yychar < 0)
{
if ((yychar = yylex()) < 0) yychar = 0;
#if YYDEBUG
if (yydebug)
{
yys = 0;
if (yychar <= YYMAXTOKEN) yys = yyname[yychar];
if (!yys) yys = "illegal-symbol";
printf("%sdebug: state %d, reading %d (%s)\n",
YYPREFIX, YYFINAL, yychar, yys);
}
#endif
}
if (yychar == 0) goto yyaccept;
goto yyloop;
}
if ((yyn = yygindex[yym]) && (yyn += yystate) >= 0 &&
yyn <= YYTABLESIZE && yycheck[yyn] == yystate)
yystate = yytable[yyn];
else
yystate = yydgoto[yym];
#if YYDEBUG
if (yydebug)
printf("%sdebug: after reduction, shifting from state %d \
to state %d\n", YYPREFIX, *yyssp, yystate);
#endif
if (yyssp >= yysslim && yygrowstack())
{
goto yyoverflow;
}
*++yyssp = (short) yystate;
*++yyvsp = yyval;
goto yyloop;
yyoverflow:
yyerror("yacc stack overflow");
yyabort:
return (1);
yyaccept:
return (0);
}
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