| 1 | #ifndef lint
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| 2 | static const char yysccsid[] = "@(#)yaccpar 1.9 (Berkeley) 02/21/93";
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| 3 | #endif
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| 4 |
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| 5 | #include <stdlib.h>
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| 6 | #include <string.h>
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| 7 |
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| 8 | #define YYBYACC 1
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| 9 | #define YYMAJOR 1
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| 10 | #define YYMINOR 9
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| 11 | #define YYPATCH 20091027
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| 12 |
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| 13 | #define YYEMPTY (-1)
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| 14 | #define yyclearin (yychar = YYEMPTY)
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| 15 | #define yyerrok (yyerrflag = 0)
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| 16 | #define YYRECOVERING() (yyerrflag != 0)
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| 17 |
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| 18 | /* compatibility with bison */
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| 19 | #ifdef YYPARSE_PARAM
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| 20 | /* compatibility with FreeBSD */
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| 21 | #ifdef YYPARSE_PARAM_TYPE
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| 22 | #define YYPARSE_DECL() yyparse(YYPARSE_PARAM_TYPE YYPARSE_PARAM)
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| 23 | #else
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| 24 | #define YYPARSE_DECL() yyparse(void *YYPARSE_PARAM)
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| 25 | #endif
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| 26 | #else
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| 27 | #define YYPARSE_DECL() yyparse(void)
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| 28 | #endif /* YYPARSE_PARAM */
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| 29 |
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| 30 | extern int YYPARSE_DECL();
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| 31 |
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| 32 | static int yygrowstack(void);
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| 33 | #define YYPREFIX "yy"
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| 34 | /* $NetBSD: arith.y,v 1.17 2003/09/17 17:33:36 jmmv Exp $ */
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| 35 |
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| 36 | /*-
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| 37 | * Copyright (c) 1993
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| 38 | * The Regents of the University of California. All rights reserved.
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| 39 | *
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| 40 | * This code is derived from software contributed to Berkeley by
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| 41 | * Kenneth Almquist.
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| 42 | *
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| 43 | * Redistribution and use in source and binary forms, with or without
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| 44 | * modification, are permitted provided that the following conditions
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| 45 | * are met:
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| 46 | * 1. Redistributions of source code must retain the above copyright
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| 47 | * notice, this list of conditions and the following disclaimer.
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| 48 | * 2. Redistributions in binary form must reproduce the above copyright
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| 49 | * notice, this list of conditions and the following disclaimer in the
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| 50 | * documentation and/or other materials provided with the distribution.
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| 51 | * 3. Neither the name of the University nor the names of its contributors
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| 52 | * may be used to endorse or promote products derived from this software
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| 53 | * without specific prior written permission.
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| 54 | *
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| 55 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 56 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 57 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 58 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 59 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 60 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 61 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 62 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 63 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 64 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 65 | * SUCH DAMAGE.
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| 66 | */
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| 67 |
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| 68 | #if 0
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| 69 | #ifndef lint
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| 70 | static char sccsid[] = "@(#)arith.y 8.3 (Berkeley) 5/4/95";
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| 71 | #else
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| 72 | __RCSID("$NetBSD: arith.y,v 1.17 2003/09/17 17:33:36 jmmv Exp $");
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| 73 | #endif /* not lint */
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| 74 | #endif
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| 75 |
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| 76 | #include <stdlib.h>
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| 77 | #include "expand.h"
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| 78 | #include "shell.h"
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| 79 | #include "error.h"
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| 80 | #include "output.h"
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| 81 | #include "memalloc.h"
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| 82 | #include "shinstance.h"
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| 83 |
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| 84 | shinstance *arith_psh;
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| 85 | const char *arith_buf, *arith_startbuf;
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| 86 |
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| 87 | void yyerror(const char *);
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| 88 | #ifdef TESTARITH
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| 89 | int main(int , char *[]);
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| 90 | int error(char *);
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| 91 | #else
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| 92 | # undef malloc
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| 93 | # define malloc(cb) sh_malloc(NULL, (cb))
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| 94 | # undef realloc
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| 95 | # define realloc(pv,cb) sh_realloc(NULL, (pv), (cb))
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| 96 | # undef free
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| 97 | # define free(pv) sh_free(NULL, (pv))
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| 98 | #endif
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| 99 |
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| 100 | #define ARITH_NUM 257
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| 101 | #define ARITH_LPAREN 258
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| 102 | #define ARITH_RPAREN 259
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| 103 | #define ARITH_OR 260
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| 104 | #define ARITH_AND 261
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| 105 | #define ARITH_BOR 262
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| 106 | #define ARITH_BXOR 263
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| 107 | #define ARITH_BAND 264
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| 108 | #define ARITH_EQ 265
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| 109 | #define ARITH_NE 266
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| 110 | #define ARITH_LT 267
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| 111 | #define ARITH_GT 268
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| 112 | #define ARITH_GE 269
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| 113 | #define ARITH_LE 270
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| 114 | #define ARITH_LSHIFT 271
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| 115 | #define ARITH_RSHIFT 272
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| 116 | #define ARITH_ADD 273
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| 117 | #define ARITH_SUB 274
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| 118 | #define ARITH_MUL 275
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| 119 | #define ARITH_DIV 276
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| 120 | #define ARITH_REM 277
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| 121 | #define ARITH_UNARYMINUS 278
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| 122 | #define ARITH_UNARYPLUS 279
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| 123 | #define ARITH_NOT 280
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| 124 | #define ARITH_BNOT 281
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| 125 | #define YYERRCODE 256
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| 126 | static const short yylhs[] = { -1,
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| 127 | 0, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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| 128 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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| 129 | 1, 1, 1, 1, 1,
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| 130 | };
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| 131 | static const short yylen[] = { 2,
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| 132 | 1, 3, 3, 3, 3, 3, 3, 3, 3, 3,
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| 133 | 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
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| 134 | 2, 2, 2, 2, 1,
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| 135 | };
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| 136 | static const short yydefred[] = { 0,
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| 137 | 25, 0, 0, 0, 0, 0, 0, 0, 0, 24,
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| 138 | 23, 21, 22, 0, 0, 0, 0, 0, 0, 0,
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| 139 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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| 140 | 0, 2, 0, 0, 0, 0, 0, 0, 0, 0,
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| 141 | 0, 0, 0, 0, 0, 0, 0, 18, 19, 20,
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| 142 | };
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| 143 | static const short yydgoto[] = { 7,
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| 144 | 8,
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| 145 | };
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| 146 | static const short yysindex[] = { -255,
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| 147 | 0, -255, -255, -255, -255, -255, 0, -67, -85, 0,
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| 148 | 0, 0, 0, -255, -255, -255, -255, -255, -255, -255,
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| 149 | -255, -255, -255, -255, -255, -255, -255, -255, -255, -255,
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| 150 | -255, 0, -50, -34, -19, 141, -261, -233, -233, -223,
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| 151 | -223, -223, -223, -253, -253, -248, -248, 0, 0, 0,
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| 152 | };
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| 153 | static const short yyrindex[] = { 0,
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| 154 | 0, 0, 0, 0, 0, 0, 0, 30, 0, 0,
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| 155 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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| 156 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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| 157 | 0, 0, 143, 140, 136, 131, 125, 109, 117, 61,
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| 158 | 73, 85, 97, 33, 47, 1, 17, 0, 0, 0,
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| 159 | };
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| 160 | static const short yygindex[] = { 0,
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| 161 | 142,
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| 162 | };
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| 163 | #define YYTABLESIZE 418
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| 164 | static const short yytable[] = { 0,
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| 165 | 16, 1, 2, 19, 20, 21, 22, 23, 24, 25,
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| 166 | 26, 27, 28, 29, 30, 31, 17, 3, 4, 27,
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| 167 | 28, 29, 30, 31, 5, 6, 29, 30, 31, 1,
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| 168 | 0, 0, 14, 21, 22, 23, 24, 25, 26, 27,
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| 169 | 28, 29, 30, 31, 0, 0, 15, 25, 26, 27,
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| 170 | 28, 29, 30, 31, 0, 0, 0, 0, 0, 0,
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| 171 | 11, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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| 172 | 0, 0, 9, 0, 0, 0, 0, 0, 0, 0,
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| 173 | 0, 0, 0, 0, 10, 0, 0, 0, 0, 0,
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| 174 | 0, 0, 0, 0, 0, 0, 12, 0, 0, 0,
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| 175 | 0, 0, 0, 0, 0, 0, 0, 0, 8, 0,
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| 176 | 0, 0, 0, 0, 0, 0, 13, 0, 0, 0,
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| 177 | 0, 0, 0, 0, 7, 0, 0, 0, 0, 0,
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| 178 | 6, 0, 0, 0, 0, 5, 0, 0, 0, 4,
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| 179 | 0, 0, 3, 9, 10, 11, 12, 13, 0, 0,
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| 180 | 0, 0, 0, 0, 0, 33, 34, 35, 36, 37,
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| 181 | 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
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| 182 | 48, 49, 50, 32, 14, 15, 16, 17, 18, 19,
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| 183 | 20, 21, 22, 23, 24, 25, 26, 27, 28, 29,
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| 184 | 30, 31, 14, 15, 16, 17, 18, 19, 20, 21,
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| 185 | 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
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| 186 | 15, 16, 17, 18, 19, 20, 21, 22, 23, 24,
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| 187 | 25, 26, 27, 28, 29, 30, 31, 16, 17, 18,
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| 188 | 19, 20, 21, 22, 23, 24, 25, 26, 27, 28,
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| 189 | 29, 30, 31, 17, 18, 19, 20, 21, 22, 23,
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| 190 | 24, 25, 26, 27, 28, 29, 30, 31, 0, 16,
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| 191 | 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
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| 192 | 16, 16, 16, 16, 16, 17, 17, 17, 17, 17,
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| 193 | 17, 17, 17, 17, 17, 17, 17, 17, 17, 17,
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| 194 | 17, 14, 14, 14, 14, 14, 14, 14, 14, 14,
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| 195 | 14, 14, 14, 14, 14, 15, 15, 15, 15, 15,
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| 196 | 15, 15, 15, 15, 15, 15, 15, 15, 15, 11,
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| 197 | 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,
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| 198 | 11, 9, 9, 9, 9, 9, 9, 9, 9, 9,
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| 199 | 9, 9, 9, 10, 10, 10, 10, 10, 10, 10,
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| 200 | 10, 10, 10, 10, 10, 12, 12, 12, 12, 12,
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| 201 | 12, 12, 12, 12, 12, 12, 12, 8, 8, 8,
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| 202 | 8, 8, 8, 8, 8, 13, 13, 13, 13, 13,
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| 203 | 13, 13, 13, 7, 7, 7, 7, 7, 7, 6,
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| 204 | 6, 6, 6, 6, 5, 5, 5, 5, 4, 4,
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| 205 | 4, 3, 3, 0, 18, 19, 20, 21, 22, 23,
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| 206 | 24, 25, 26, 27, 28, 29, 30, 31,
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| 207 | };
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| 208 | static const short yycheck[] = { -1,
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| 209 | 0, 257, 258, 265, 266, 267, 268, 269, 270, 271,
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| 210 | 272, 273, 274, 275, 276, 277, 0, 273, 274, 273,
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| 211 | 274, 275, 276, 277, 280, 281, 275, 276, 277, 0,
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| 212 | -1, -1, 0, 267, 268, 269, 270, 271, 272, 273,
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| 213 | 274, 275, 276, 277, -1, -1, 0, 271, 272, 273,
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| 214 | 274, 275, 276, 277, -1, -1, -1, -1, -1, -1,
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| 215 | 0, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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| 216 | -1, -1, 0, -1, -1, -1, -1, -1, -1, -1,
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| 217 | -1, -1, -1, -1, 0, -1, -1, -1, -1, -1,
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| 218 | -1, -1, -1, -1, -1, -1, 0, -1, -1, -1,
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| 219 | -1, -1, -1, -1, -1, -1, -1, -1, 0, -1,
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| 220 | -1, -1, -1, -1, -1, -1, 0, -1, -1, -1,
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| 221 | -1, -1, -1, -1, 0, -1, -1, -1, -1, -1,
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| 222 | 0, -1, -1, -1, -1, 0, -1, -1, -1, 0,
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| 223 | -1, -1, 0, 2, 3, 4, 5, 6, -1, -1,
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| 224 | -1, -1, -1, -1, -1, 14, 15, 16, 17, 18,
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| 225 | 19, 20, 21, 22, 23, 24, 25, 26, 27, 28,
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| 226 | 29, 30, 31, 259, 260, 261, 262, 263, 264, 265,
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| 227 | 266, 267, 268, 269, 270, 271, 272, 273, 274, 275,
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| 228 | 276, 277, 260, 261, 262, 263, 264, 265, 266, 267,
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| 229 | 268, 269, 270, 271, 272, 273, 274, 275, 276, 277,
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| 230 | 261, 262, 263, 264, 265, 266, 267, 268, 269, 270,
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| 231 | 271, 272, 273, 274, 275, 276, 277, 262, 263, 264,
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| 232 | 265, 266, 267, 268, 269, 270, 271, 272, 273, 274,
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| 233 | 275, 276, 277, 263, 264, 265, 266, 267, 268, 269,
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| 234 | 270, 271, 272, 273, 274, 275, 276, 277, -1, 259,
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| 235 | 260, 261, 262, 263, 264, 265, 266, 267, 268, 269,
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| 236 | 270, 271, 272, 273, 274, 259, 260, 261, 262, 263,
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| 237 | 264, 265, 266, 267, 268, 269, 270, 271, 272, 273,
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| 238 | 274, 259, 260, 261, 262, 263, 264, 265, 266, 267,
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| 239 | 268, 269, 270, 271, 272, 259, 260, 261, 262, 263,
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| 240 | 264, 265, 266, 267, 268, 269, 270, 271, 272, 259,
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| 241 | 260, 261, 262, 263, 264, 265, 266, 267, 268, 269,
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| 242 | 270, 259, 260, 261, 262, 263, 264, 265, 266, 267,
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| 243 | 268, 269, 270, 259, 260, 261, 262, 263, 264, 265,
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| 244 | 266, 267, 268, 269, 270, 259, 260, 261, 262, 263,
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| 245 | 264, 265, 266, 267, 268, 269, 270, 259, 260, 261,
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| 246 | 262, 263, 264, 265, 266, 259, 260, 261, 262, 263,
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| 247 | 264, 265, 266, 259, 260, 261, 262, 263, 264, 259,
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| 248 | 260, 261, 262, 263, 259, 260, 261, 262, 259, 260,
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| 249 | 261, 259, 260, -1, 264, 265, 266, 267, 268, 269,
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| 250 | 270, 271, 272, 273, 274, 275, 276, 277,
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| 251 | };
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| 252 | #define YYFINAL 7
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| 253 | #ifndef YYDEBUG
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| 254 | #define YYDEBUG 0
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| 255 | #endif
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| 256 | #define YYMAXTOKEN 281
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| 257 | #if YYDEBUG
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| 258 | static const char *yyname[] = {
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| 259 |
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| 260 | "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,
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| 261 | 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,
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| 262 | 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,
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| 263 | 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,
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| 264 | 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,
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| 265 | 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,
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| 266 | 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",
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| 267 | "ARITH_RPAREN","ARITH_OR","ARITH_AND","ARITH_BOR","ARITH_BXOR","ARITH_BAND",
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| 268 | "ARITH_EQ","ARITH_NE","ARITH_LT","ARITH_GT","ARITH_GE","ARITH_LE",
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| 269 | "ARITH_LSHIFT","ARITH_RSHIFT","ARITH_ADD","ARITH_SUB","ARITH_MUL","ARITH_DIV",
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| 270 | "ARITH_REM","ARITH_UNARYMINUS","ARITH_UNARYPLUS","ARITH_NOT","ARITH_BNOT",
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| 271 | };
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| 272 | static const char *yyrule[] = {
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| 273 | "$accept : exp",
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|---|
| 274 | "exp : expr",
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|---|
| 275 | "expr : ARITH_LPAREN expr ARITH_RPAREN",
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|---|
| 276 | "expr : expr ARITH_OR expr",
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|---|
| 277 | "expr : expr ARITH_AND expr",
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|---|
| 278 | "expr : expr ARITH_BOR expr",
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|---|
| 279 | "expr : expr ARITH_BXOR expr",
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|---|
| 280 | "expr : expr ARITH_BAND expr",
|
|---|
| 281 | "expr : expr ARITH_EQ expr",
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|---|
| 282 | "expr : expr ARITH_GT expr",
|
|---|
| 283 | "expr : expr ARITH_GE expr",
|
|---|
| 284 | "expr : expr ARITH_LT expr",
|
|---|
| 285 | "expr : expr ARITH_LE expr",
|
|---|
| 286 | "expr : expr ARITH_NE expr",
|
|---|
| 287 | "expr : expr ARITH_LSHIFT expr",
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|---|
| 288 | "expr : expr ARITH_RSHIFT expr",
|
|---|
| 289 | "expr : expr ARITH_ADD expr",
|
|---|
| 290 | "expr : expr ARITH_SUB expr",
|
|---|
| 291 | "expr : expr ARITH_MUL expr",
|
|---|
| 292 | "expr : expr ARITH_DIV expr",
|
|---|
| 293 | "expr : expr ARITH_REM expr",
|
|---|
| 294 | "expr : ARITH_NOT expr",
|
|---|
| 295 | "expr : ARITH_BNOT expr",
|
|---|
| 296 | "expr : ARITH_SUB expr",
|
|---|
| 297 | "expr : ARITH_ADD expr",
|
|---|
| 298 | "expr : ARITH_NUM",
|
|---|
| 299 |
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|---|
| 300 | };
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|---|
| 301 | #endif
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|---|
| 302 | #ifndef YYSTYPE
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|---|
| 303 | typedef int YYSTYPE;
|
|---|
| 304 | #endif
|
|---|
| 305 | #if YYDEBUG
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|---|
| 306 | #include <stdio.h>
|
|---|
| 307 | #endif
|
|---|
| 308 |
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|---|
| 309 | /* define the initial stack-sizes */
|
|---|
| 310 | #ifdef YYSTACKSIZE
|
|---|
| 311 | #undef YYMAXDEPTH
|
|---|
| 312 | #define YYMAXDEPTH YYSTACKSIZE
|
|---|
| 313 | #else
|
|---|
| 314 | #ifdef YYMAXDEPTH
|
|---|
| 315 | #define YYSTACKSIZE YYMAXDEPTH
|
|---|
| 316 | #else
|
|---|
| 317 | #define YYSTACKSIZE 500
|
|---|
| 318 | #define YYMAXDEPTH 500
|
|---|
| 319 | #endif
|
|---|
| 320 | #endif
|
|---|
| 321 |
|
|---|
| 322 | #define YYINITSTACKSIZE 500
|
|---|
| 323 |
|
|---|
| 324 | int yydebug;
|
|---|
| 325 | int yynerrs;
|
|---|
| 326 | int yyerrflag;
|
|---|
| 327 | int yychar;
|
|---|
| 328 | short *yyssp;
|
|---|
| 329 | YYSTYPE *yyvsp;
|
|---|
| 330 | YYSTYPE yyval;
|
|---|
| 331 | YYSTYPE yylval;
|
|---|
| 332 |
|
|---|
| 333 | /* variables for the parser stack */
|
|---|
| 334 | static short *yyss;
|
|---|
| 335 | static short *yysslim;
|
|---|
| 336 | static YYSTYPE *yyvs;
|
|---|
| 337 | static unsigned yystacksize;
|
|---|
| 338 | int
|
|---|
| 339 | arith(shinstance *psh, const char *s)
|
|---|
| 340 | {
|
|---|
| 341 | long result;
|
|---|
| 342 |
|
|---|
| 343 | INTOFF;
|
|---|
| 344 | /* todo lock */
|
|---|
| 345 | arith_psh = psh;
|
|---|
| 346 | arith_buf = arith_startbuf = s;
|
|---|
| 347 | result = yyparse();
|
|---|
| 348 | arith_lex_reset(); /* reprime lex */
|
|---|
| 349 | arith_psh = NULL;
|
|---|
| 350 | /* todo unlock */
|
|---|
| 351 | INTON;
|
|---|
| 352 |
|
|---|
| 353 | return (result);
|
|---|
| 354 | }
|
|---|
| 355 |
|
|---|
| 356 |
|
|---|
| 357 | /*
|
|---|
| 358 | * The exp(1) builtin.
|
|---|
| 359 | */
|
|---|
| 360 | int
|
|---|
| 361 | expcmd(shinstance *psh, int argc, char **argv)
|
|---|
| 362 | {
|
|---|
| 363 | const char *p;
|
|---|
| 364 | char *concat;
|
|---|
| 365 | char **ap;
|
|---|
| 366 | long i;
|
|---|
| 367 |
|
|---|
| 368 | if (argc > 1) {
|
|---|
| 369 | p = argv[1];
|
|---|
| 370 | if (argc > 2) {
|
|---|
| 371 | /*
|
|---|
| 372 | * concatenate arguments
|
|---|
| 373 | */
|
|---|
| 374 | STARTSTACKSTR(psh, concat);
|
|---|
| 375 | ap = argv + 2;
|
|---|
| 376 | for (;;) {
|
|---|
| 377 | while (*p)
|
|---|
| 378 | STPUTC(psh, *p++, concat);
|
|---|
| 379 | if ((p = *ap++) == NULL)
|
|---|
| 380 | break;
|
|---|
| 381 | STPUTC(psh, ' ', concat);
|
|---|
| 382 | }
|
|---|
| 383 | STPUTC(psh, '\0', concat);
|
|---|
| 384 | p = grabstackstr(psh, concat);
|
|---|
| 385 | }
|
|---|
| 386 | } else
|
|---|
| 387 | p = "";
|
|---|
| 388 |
|
|---|
| 389 | i = arith(psh, p);
|
|---|
| 390 |
|
|---|
| 391 | out1fmt(psh, "%ld\n", i);
|
|---|
| 392 | return (! i);
|
|---|
| 393 | }
|
|---|
| 394 |
|
|---|
| 395 | /*************************/
|
|---|
| 396 | #ifdef TEST_ARITH
|
|---|
| 397 | #include <stdio.h>
|
|---|
| 398 | main(argc, argv)
|
|---|
| 399 | char *argv[];
|
|---|
| 400 | {
|
|---|
| 401 | printf("%d\n", exp(argv[1]));
|
|---|
| 402 | }
|
|---|
| 403 | error(s)
|
|---|
| 404 | char *s;
|
|---|
| 405 | {
|
|---|
| 406 | fprintf(stderr, "exp: %s\n", s);
|
|---|
| 407 | exit(1);
|
|---|
| 408 | }
|
|---|
| 409 | #endif
|
|---|
| 410 |
|
|---|
| 411 | void
|
|---|
| 412 | yyerror(const char *s)
|
|---|
| 413 | {
|
|---|
| 414 | shinstance *psh = arith_psh;
|
|---|
| 415 | #ifndef YYBISON /* yyerrok references yyerrstatus which is a local variable in yyparse().*/
|
|---|
| 416 | yyerrok;
|
|---|
| 417 | #endif
|
|---|
| 418 | yyclearin;
|
|---|
| 419 | arith_lex_reset(); /* reprime lex */
|
|---|
| 420 | /** @todo unlock */
|
|---|
| 421 | error(psh, "arithmetic expression: %s: \"%s\"", s, arith_startbuf);
|
|---|
| 422 | /* NOTREACHED */
|
|---|
| 423 | }
|
|---|
| 424 | /* allocate initial stack or double stack size, up to YYMAXDEPTH */
|
|---|
| 425 | static int yygrowstack(void)
|
|---|
| 426 | {
|
|---|
| 427 | int i;
|
|---|
| 428 | unsigned newsize;
|
|---|
| 429 | short *newss;
|
|---|
| 430 | YYSTYPE *newvs;
|
|---|
| 431 |
|
|---|
| 432 | if ((newsize = yystacksize) == 0)
|
|---|
| 433 | newsize = YYINITSTACKSIZE;
|
|---|
| 434 | else if (newsize >= YYMAXDEPTH)
|
|---|
| 435 | return -1;
|
|---|
| 436 | else if ((newsize *= 2) > YYMAXDEPTH)
|
|---|
| 437 | newsize = YYMAXDEPTH;
|
|---|
| 438 |
|
|---|
| 439 | i = yyssp - yyss;
|
|---|
| 440 | newss = (yyss != 0)
|
|---|
| 441 | ? (short *)realloc(yyss, newsize * sizeof(*newss))
|
|---|
| 442 | : (short *)malloc(newsize * sizeof(*newss));
|
|---|
| 443 | if (newss == 0)
|
|---|
| 444 | return -1;
|
|---|
| 445 |
|
|---|
| 446 | yyss = newss;
|
|---|
| 447 | yyssp = newss + i;
|
|---|
| 448 | newvs = (yyvs != 0)
|
|---|
| 449 | ? (YYSTYPE *)realloc(yyvs, newsize * sizeof(*newvs))
|
|---|
| 450 | : (YYSTYPE *)malloc(newsize * sizeof(*newvs));
|
|---|
| 451 | if (newvs == 0)
|
|---|
| 452 | return -1;
|
|---|
| 453 |
|
|---|
| 454 | yyvs = newvs;
|
|---|
| 455 | yyvsp = newvs + i;
|
|---|
| 456 | yystacksize = newsize;
|
|---|
| 457 | yysslim = yyss + newsize - 1;
|
|---|
| 458 | return 0;
|
|---|
| 459 | }
|
|---|
| 460 |
|
|---|
| 461 | #define YYABORT goto yyabort
|
|---|
| 462 | #define YYREJECT goto yyabort
|
|---|
| 463 | #define YYACCEPT goto yyaccept
|
|---|
| 464 | #define YYERROR goto yyerrlab
|
|---|
| 465 |
|
|---|
| 466 | int
|
|---|
| 467 | YYPARSE_DECL()
|
|---|
| 468 | {
|
|---|
| 469 | int yym, yyn, yystate;
|
|---|
| 470 | #if YYDEBUG
|
|---|
| 471 | const char *yys;
|
|---|
| 472 |
|
|---|
| 473 | if ((yys = getenv("YYDEBUG")) != 0)
|
|---|
| 474 | {
|
|---|
| 475 | yyn = *yys;
|
|---|
| 476 | if (yyn >= '0' && yyn <= '9')
|
|---|
| 477 | yydebug = yyn - '0';
|
|---|
| 478 | }
|
|---|
| 479 | #endif
|
|---|
| 480 |
|
|---|
| 481 | yynerrs = 0;
|
|---|
| 482 | yyerrflag = 0;
|
|---|
| 483 | yychar = YYEMPTY;
|
|---|
| 484 | yystate = 0;
|
|---|
| 485 |
|
|---|
| 486 | if (yyss == NULL && yygrowstack()) goto yyoverflow;
|
|---|
| 487 | yyssp = yyss;
|
|---|
| 488 | yyvsp = yyvs;
|
|---|
| 489 | yystate = 0;
|
|---|
| 490 | *yyssp = 0;
|
|---|
| 491 |
|
|---|
| 492 | yyloop:
|
|---|
| 493 | if ((yyn = yydefred[yystate]) != 0) goto yyreduce;
|
|---|
| 494 | if (yychar < 0)
|
|---|
| 495 | {
|
|---|
| 496 | if ((yychar = yylex()) < 0) yychar = 0;
|
|---|
| 497 | #if YYDEBUG
|
|---|
| 498 | if (yydebug)
|
|---|
| 499 | {
|
|---|
| 500 | yys = 0;
|
|---|
| 501 | if (yychar <= YYMAXTOKEN) yys = yyname[yychar];
|
|---|
| 502 | if (!yys) yys = "illegal-symbol";
|
|---|
| 503 | printf("%sdebug: state %d, reading %d (%s)\n",
|
|---|
| 504 | YYPREFIX, yystate, yychar, yys);
|
|---|
| 505 | }
|
|---|
| 506 | #endif
|
|---|
| 507 | }
|
|---|
| 508 | if ((yyn = yysindex[yystate]) && (yyn += yychar) >= 0 &&
|
|---|
| 509 | yyn <= YYTABLESIZE && yycheck[yyn] == yychar)
|
|---|
| 510 | {
|
|---|
| 511 | #if YYDEBUG
|
|---|
| 512 | if (yydebug)
|
|---|
| 513 | printf("%sdebug: state %d, shifting to state %d\n",
|
|---|
| 514 | YYPREFIX, yystate, yytable[yyn]);
|
|---|
| 515 | #endif
|
|---|
| 516 | if (yyssp >= yysslim && yygrowstack())
|
|---|
| 517 | {
|
|---|
| 518 | goto yyoverflow;
|
|---|
| 519 | }
|
|---|
| 520 | yystate = yytable[yyn];
|
|---|
| 521 | *++yyssp = yytable[yyn];
|
|---|
| 522 | *++yyvsp = yylval;
|
|---|
| 523 | yychar = YYEMPTY;
|
|---|
| 524 | if (yyerrflag > 0) --yyerrflag;
|
|---|
| 525 | goto yyloop;
|
|---|
| 526 | }
|
|---|
| 527 | if ((yyn = yyrindex[yystate]) && (yyn += yychar) >= 0 &&
|
|---|
| 528 | yyn <= YYTABLESIZE && yycheck[yyn] == yychar)
|
|---|
| 529 | {
|
|---|
| 530 | yyn = yytable[yyn];
|
|---|
| 531 | goto yyreduce;
|
|---|
| 532 | }
|
|---|
| 533 | if (yyerrflag) goto yyinrecovery;
|
|---|
| 534 |
|
|---|
| 535 | yyerror("syntax error");
|
|---|
| 536 |
|
|---|
| 537 | goto yyerrlab;
|
|---|
| 538 |
|
|---|
| 539 | yyerrlab:
|
|---|
| 540 | ++yynerrs;
|
|---|
| 541 |
|
|---|
| 542 | yyinrecovery:
|
|---|
| 543 | if (yyerrflag < 3)
|
|---|
| 544 | {
|
|---|
| 545 | yyerrflag = 3;
|
|---|
| 546 | for (;;)
|
|---|
| 547 | {
|
|---|
| 548 | if ((yyn = yysindex[*yyssp]) && (yyn += YYERRCODE) >= 0 &&
|
|---|
| 549 | yyn <= YYTABLESIZE && yycheck[yyn] == YYERRCODE)
|
|---|
| 550 | {
|
|---|
| 551 | #if YYDEBUG
|
|---|
| 552 | if (yydebug)
|
|---|
| 553 | printf("%sdebug: state %d, error recovery shifting\
|
|---|
| 554 | to state %d\n", YYPREFIX, *yyssp, yytable[yyn]);
|
|---|
| 555 | #endif
|
|---|
| 556 | if (yyssp >= yysslim && yygrowstack())
|
|---|
| 557 | {
|
|---|
| 558 | goto yyoverflow;
|
|---|
| 559 | }
|
|---|
| 560 | yystate = yytable[yyn];
|
|---|
| 561 | *++yyssp = yytable[yyn];
|
|---|
| 562 | *++yyvsp = yylval;
|
|---|
| 563 | goto yyloop;
|
|---|
| 564 | }
|
|---|
| 565 | else
|
|---|
| 566 | {
|
|---|
| 567 | #if YYDEBUG
|
|---|
| 568 | if (yydebug)
|
|---|
| 569 | printf("%sdebug: error recovery discarding state %d\n",
|
|---|
| 570 | YYPREFIX, *yyssp);
|
|---|
| 571 | #endif
|
|---|
| 572 | if (yyssp <= yyss) goto yyabort;
|
|---|
| 573 | --yyssp;
|
|---|
| 574 | --yyvsp;
|
|---|
| 575 | }
|
|---|
| 576 | }
|
|---|
| 577 | }
|
|---|
| 578 | else
|
|---|
| 579 | {
|
|---|
| 580 | if (yychar == 0) goto yyabort;
|
|---|
| 581 | #if YYDEBUG
|
|---|
| 582 | if (yydebug)
|
|---|
| 583 | {
|
|---|
| 584 | yys = 0;
|
|---|
| 585 | if (yychar <= YYMAXTOKEN) yys = yyname[yychar];
|
|---|
| 586 | if (!yys) yys = "illegal-symbol";
|
|---|
| 587 | printf("%sdebug: state %d, error recovery discards token %d (%s)\n",
|
|---|
| 588 | YYPREFIX, yystate, yychar, yys);
|
|---|
| 589 | }
|
|---|
| 590 | #endif
|
|---|
| 591 | yychar = YYEMPTY;
|
|---|
| 592 | goto yyloop;
|
|---|
| 593 | }
|
|---|
| 594 |
|
|---|
| 595 | yyreduce:
|
|---|
| 596 | #if YYDEBUG
|
|---|
| 597 | if (yydebug)
|
|---|
| 598 | printf("%sdebug: state %d, reducing by rule %d (%s)\n",
|
|---|
| 599 | YYPREFIX, yystate, yyn, yyrule[yyn]);
|
|---|
| 600 | #endif
|
|---|
| 601 | yym = yylen[yyn];
|
|---|
| 602 | if (yym)
|
|---|
| 603 | yyval = yyvsp[1-yym];
|
|---|
| 604 | else
|
|---|
| 605 | memset(&yyval, 0, sizeof yyval);
|
|---|
| 606 | switch (yyn)
|
|---|
| 607 | {
|
|---|
| 608 | case 1:
|
|---|
| 609 | {
|
|---|
| 610 | return (yyvsp[0]);
|
|---|
| 611 | }
|
|---|
| 612 | break;
|
|---|
| 613 | case 2:
|
|---|
| 614 | { yyval = yyvsp[-1]; }
|
|---|
| 615 | break;
|
|---|
| 616 | case 3:
|
|---|
| 617 | { yyval = yyvsp[-2] ? yyvsp[-2] : yyvsp[0] ? yyvsp[0] : 0; }
|
|---|
| 618 | break;
|
|---|
| 619 | case 4:
|
|---|
| 620 | { yyval = yyvsp[-2] ? ( yyvsp[0] ? yyvsp[0] : 0 ) : 0; }
|
|---|
| 621 | break;
|
|---|
| 622 | case 5:
|
|---|
| 623 | { yyval = yyvsp[-2] | yyvsp[0]; }
|
|---|
| 624 | break;
|
|---|
| 625 | case 6:
|
|---|
| 626 | { yyval = yyvsp[-2] ^ yyvsp[0]; }
|
|---|
| 627 | break;
|
|---|
| 628 | case 7:
|
|---|
| 629 | { yyval = yyvsp[-2] & yyvsp[0]; }
|
|---|
| 630 | break;
|
|---|
| 631 | case 8:
|
|---|
| 632 | { yyval = yyvsp[-2] == yyvsp[0]; }
|
|---|
| 633 | break;
|
|---|
| 634 | case 9:
|
|---|
| 635 | { yyval = yyvsp[-2] > yyvsp[0]; }
|
|---|
| 636 | break;
|
|---|
| 637 | case 10:
|
|---|
| 638 | { yyval = yyvsp[-2] >= yyvsp[0]; }
|
|---|
| 639 | break;
|
|---|
| 640 | case 11:
|
|---|
| 641 | { yyval = yyvsp[-2] < yyvsp[0]; }
|
|---|
| 642 | break;
|
|---|
| 643 | case 12:
|
|---|
| 644 | { yyval = yyvsp[-2] <= yyvsp[0]; }
|
|---|
| 645 | break;
|
|---|
| 646 | case 13:
|
|---|
| 647 | { yyval = yyvsp[-2] != yyvsp[0]; }
|
|---|
| 648 | break;
|
|---|
| 649 | case 14:
|
|---|
| 650 | { yyval = yyvsp[-2] << yyvsp[0]; }
|
|---|
| 651 | break;
|
|---|
| 652 | case 15:
|
|---|
| 653 | { yyval = yyvsp[-2] >> yyvsp[0]; }
|
|---|
| 654 | break;
|
|---|
| 655 | case 16:
|
|---|
| 656 | { yyval = yyvsp[-2] + yyvsp[0]; }
|
|---|
| 657 | break;
|
|---|
| 658 | case 17:
|
|---|
| 659 | { yyval = yyvsp[-2] - yyvsp[0]; }
|
|---|
| 660 | break;
|
|---|
| 661 | case 18:
|
|---|
| 662 | { yyval = yyvsp[-2] * yyvsp[0]; }
|
|---|
| 663 | break;
|
|---|
| 664 | case 19:
|
|---|
| 665 | {
|
|---|
| 666 | if (yyvsp[0] == 0)
|
|---|
| 667 | yyerror("division by zero");
|
|---|
| 668 | yyval = yyvsp[-2] / yyvsp[0];
|
|---|
| 669 | }
|
|---|
| 670 | break;
|
|---|
| 671 | case 20:
|
|---|
| 672 | {
|
|---|
| 673 | if (yyvsp[0] == 0)
|
|---|
| 674 | yyerror("division by zero");
|
|---|
| 675 | yyval = yyvsp[-2] % yyvsp[0];
|
|---|
| 676 | }
|
|---|
| 677 | break;
|
|---|
| 678 | case 21:
|
|---|
| 679 | { yyval = !(yyvsp[0]); }
|
|---|
| 680 | break;
|
|---|
| 681 | case 22:
|
|---|
| 682 | { yyval = ~(yyvsp[0]); }
|
|---|
| 683 | break;
|
|---|
| 684 | case 23:
|
|---|
| 685 | { yyval = -(yyvsp[0]); }
|
|---|
| 686 | break;
|
|---|
| 687 | case 24:
|
|---|
| 688 | { yyval = yyvsp[0]; }
|
|---|
| 689 | break;
|
|---|
| 690 | }
|
|---|
| 691 | yyssp -= yym;
|
|---|
| 692 | yystate = *yyssp;
|
|---|
| 693 | yyvsp -= yym;
|
|---|
| 694 | yym = yylhs[yyn];
|
|---|
| 695 | if (yystate == 0 && yym == 0)
|
|---|
| 696 | {
|
|---|
| 697 | #if YYDEBUG
|
|---|
| 698 | if (yydebug)
|
|---|
| 699 | printf("%sdebug: after reduction, shifting from state 0 to\
|
|---|
| 700 | state %d\n", YYPREFIX, YYFINAL);
|
|---|
| 701 | #endif
|
|---|
| 702 | yystate = YYFINAL;
|
|---|
| 703 | *++yyssp = YYFINAL;
|
|---|
| 704 | *++yyvsp = yyval;
|
|---|
| 705 | if (yychar < 0)
|
|---|
| 706 | {
|
|---|
| 707 | if ((yychar = yylex()) < 0) yychar = 0;
|
|---|
| 708 | #if YYDEBUG
|
|---|
| 709 | if (yydebug)
|
|---|
| 710 | {
|
|---|
| 711 | yys = 0;
|
|---|
| 712 | if (yychar <= YYMAXTOKEN) yys = yyname[yychar];
|
|---|
| 713 | if (!yys) yys = "illegal-symbol";
|
|---|
| 714 | printf("%sdebug: state %d, reading %d (%s)\n",
|
|---|
| 715 | YYPREFIX, YYFINAL, yychar, yys);
|
|---|
| 716 | }
|
|---|
| 717 | #endif
|
|---|
| 718 | }
|
|---|
| 719 | if (yychar == 0) goto yyaccept;
|
|---|
| 720 | goto yyloop;
|
|---|
| 721 | }
|
|---|
| 722 | if ((yyn = yygindex[yym]) && (yyn += yystate) >= 0 &&
|
|---|
| 723 | yyn <= YYTABLESIZE && yycheck[yyn] == yystate)
|
|---|
| 724 | yystate = yytable[yyn];
|
|---|
| 725 | else
|
|---|
| 726 | yystate = yydgoto[yym];
|
|---|
| 727 | #if YYDEBUG
|
|---|
| 728 | if (yydebug)
|
|---|
| 729 | printf("%sdebug: after reduction, shifting from state %d \
|
|---|
| 730 | to state %d\n", YYPREFIX, *yyssp, yystate);
|
|---|
| 731 | #endif
|
|---|
| 732 | if (yyssp >= yysslim && yygrowstack())
|
|---|
| 733 | {
|
|---|
| 734 | goto yyoverflow;
|
|---|
| 735 | }
|
|---|
| 736 | *++yyssp = (short) yystate;
|
|---|
| 737 | *++yyvsp = yyval;
|
|---|
| 738 | goto yyloop;
|
|---|
| 739 |
|
|---|
| 740 | yyoverflow:
|
|---|
| 741 | yyerror("yacc stack overflow");
|
|---|
| 742 |
|
|---|
| 743 | yyabort:
|
|---|
| 744 | return (1);
|
|---|
| 745 |
|
|---|
| 746 | yyaccept:
|
|---|
| 747 | return (0);
|
|---|
| 748 | }
|
|---|
