| 1 | #ifndef lint
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| 2 | /*static char yysccsid[] = "from: @(#)yaccpar 1.9 (Berkeley) 02/21/93";*/
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| 3 | static char yyrcsid[] = "$Id: skeleton.c,v 1.2 1997/06/23 02:51:17 tdukes Exp $";
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| 4 | #endif
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| 5 | #define YYBYACC 1
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| 6 | #define YYMAJOR 1
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| 7 | #define YYMINOR 9
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| 8 | #define yyclearin (yychar=(-1))
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| 9 | #define yyerrok (yyerrflag=0)
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| 10 | #define YYRECOVERING (yyerrflag!=0)
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| 11 | #define YYPREFIX "yy"
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| 12 | /* $NetBSD: arith.y,v 1.17 2003/09/17 17:33:36 jmmv Exp $ */
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| 13 |
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| 14 | /*-
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| 15 | * Copyright (c) 1993
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| 16 | * The Regents of the University of California. All rights reserved.
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| 17 | *
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| 18 | * This code is derived from software contributed to Berkeley by
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| 19 | * Kenneth Almquist.
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| 20 | *
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| 21 | * Redistribution and use in source and binary forms, with or without
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| 22 | * modification, are permitted provided that the following conditions
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| 23 | * are met:
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| 24 | * 1. Redistributions of source code must retain the above copyright
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| 25 | * notice, this list of conditions and the following disclaimer.
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| 26 | * 2. Redistributions in binary form must reproduce the above copyright
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| 27 | * notice, this list of conditions and the following disclaimer in the
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| 28 | * documentation and/or other materials provided with the distribution.
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| 29 | * 3. Neither the name of the University nor the names of its contributors
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| 30 | * may be used to endorse or promote products derived from this software
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| 31 | * without specific prior written permission.
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| 32 | *
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| 33 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 34 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 35 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 36 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 37 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 38 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 39 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 40 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 41 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 42 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 43 | * SUCH DAMAGE.
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| 44 | */
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| 45 |
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| 46 | #include <sys/cdefs.h>
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| 47 | #ifndef lint
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| 48 | #if 0
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| 49 | static char sccsid[] = "@(#)arith.y 8.3 (Berkeley) 5/4/95";
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| 50 | #else
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| 51 | __RCSID("$NetBSD: arith.y,v 1.17 2003/09/17 17:33:36 jmmv Exp $");
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| 52 | #endif
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| 53 | #endif /* not lint */
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| 54 |
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| 55 | #include <stdlib.h>
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| 56 | #include "expand.h"
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| 57 | #include "shell.h"
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| 58 | #include "error.h"
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| 59 | #include "output.h"
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| 60 | #include "memalloc.h"
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| 61 |
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| 62 | const char *arith_buf, *arith_startbuf;
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| 63 |
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| 64 | void yyerror(const char *);
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| 65 | #ifdef TESTARITH
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| 66 | int main(int , char *[]);
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| 67 | int error(char *);
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| 68 | #endif
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| 69 |
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| 70 | #define ARITH_NUM 257
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| 71 | #define ARITH_LPAREN 258
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| 72 | #define ARITH_RPAREN 259
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| 73 | #define ARITH_OR 260
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| 74 | #define ARITH_AND 261
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| 75 | #define ARITH_BOR 262
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| 76 | #define ARITH_BXOR 263
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| 77 | #define ARITH_BAND 264
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| 78 | #define ARITH_EQ 265
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| 79 | #define ARITH_NE 266
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| 80 | #define ARITH_LT 267
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| 81 | #define ARITH_GT 268
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| 82 | #define ARITH_GE 269
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| 83 | #define ARITH_LE 270
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| 84 | #define ARITH_LSHIFT 271
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| 85 | #define ARITH_RSHIFT 272
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| 86 | #define ARITH_ADD 273
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| 87 | #define ARITH_SUB 274
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| 88 | #define ARITH_MUL 275
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| 89 | #define ARITH_DIV 276
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| 90 | #define ARITH_REM 277
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| 91 | #define ARITH_UNARYMINUS 278
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| 92 | #define ARITH_UNARYPLUS 279
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| 93 | #define ARITH_NOT 280
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| 94 | #define ARITH_BNOT 281
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| 95 | #define YYERRCODE 256
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| 96 | short yylhs[] = { -1,
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| 97 | 0, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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| 98 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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| 99 | 1, 1, 1, 1, 1,
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| 100 | };
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| 101 | short yylen[] = { 2,
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| 102 | 1, 3, 3, 3, 3, 3, 3, 3, 3, 3,
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| 103 | 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
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| 104 | 2, 2, 2, 2, 1,
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| 105 | };
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| 106 | short yydefred[] = { 0,
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| 107 | 25, 0, 0, 0, 0, 0, 0, 0, 0, 24,
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| 108 | 23, 21, 22, 0, 0, 0, 0, 0, 0, 0,
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| 109 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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| 110 | 0, 2, 0, 0, 0, 0, 0, 0, 0, 0,
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| 111 | 0, 0, 0, 0, 0, 0, 0, 18, 19, 20,
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| 112 | };
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| 113 | short yydgoto[] = { 7,
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| 114 | 8,
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| 115 | };
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| 116 | short yysindex[] = { -255,
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| 117 | 0, -255, -255, -255, -255, -255, 0, -67, -85, 0,
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| 118 | 0, 0, 0, -255, -255, -255, -255, -255, -255, -255,
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| 119 | -255, -255, -255, -255, -255, -255, -255, -255, -255, -255,
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| 120 | -255, 0, -50, -34, -19, 141, -261, -233, -233, -223,
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| 121 | -223, -223, -223, -253, -253, -248, -248, 0, 0, 0,
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| 122 | };
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| 123 | short yyrindex[] = { 0,
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| 124 | 0, 0, 0, 0, 0, 0, 0, 30, 0, 0,
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| 125 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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| 126 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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| 127 | 0, 0, 143, 140, 136, 131, 125, 109, 117, 61,
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| 128 | 73, 85, 97, 33, 47, 1, 17, 0, 0, 0,
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| 129 | };
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| 130 | short yygindex[] = { 0,
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| 131 | 142,
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| 132 | };
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| 133 | #define YYTABLESIZE 418
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| 134 | short yytable[] = { 0,
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| 135 | 16, 1, 2, 19, 20, 21, 22, 23, 24, 25,
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| 136 | 26, 27, 28, 29, 30, 31, 17, 3, 4, 27,
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| 137 | 28, 29, 30, 31, 5, 6, 29, 30, 31, 1,
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| 138 | 0, 0, 14, 21, 22, 23, 24, 25, 26, 27,
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| 139 | 28, 29, 30, 31, 0, 0, 15, 25, 26, 27,
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| 140 | 28, 29, 30, 31, 0, 0, 0, 0, 0, 0,
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| 141 | 11, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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| 142 | 0, 0, 9, 0, 0, 0, 0, 0, 0, 0,
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| 143 | 0, 0, 0, 0, 10, 0, 0, 0, 0, 0,
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| 144 | 0, 0, 0, 0, 0, 0, 12, 0, 0, 0,
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| 145 | 0, 0, 0, 0, 0, 0, 0, 0, 8, 0,
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| 146 | 0, 0, 0, 0, 0, 0, 13, 0, 0, 0,
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| 147 | 0, 0, 0, 0, 7, 0, 0, 0, 0, 0,
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| 148 | 6, 0, 0, 0, 0, 5, 0, 0, 0, 4,
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| 149 | 0, 0, 3, 9, 10, 11, 12, 13, 0, 0,
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| 150 | 0, 0, 0, 0, 0, 33, 34, 35, 36, 37,
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| 151 | 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
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| 152 | 48, 49, 50, 32, 14, 15, 16, 17, 18, 19,
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| 153 | 20, 21, 22, 23, 24, 25, 26, 27, 28, 29,
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| 154 | 30, 31, 14, 15, 16, 17, 18, 19, 20, 21,
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| 155 | 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
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| 156 | 15, 16, 17, 18, 19, 20, 21, 22, 23, 24,
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| 157 | 25, 26, 27, 28, 29, 30, 31, 16, 17, 18,
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| 158 | 19, 20, 21, 22, 23, 24, 25, 26, 27, 28,
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| 159 | 29, 30, 31, 17, 18, 19, 20, 21, 22, 23,
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| 160 | 24, 25, 26, 27, 28, 29, 30, 31, 0, 16,
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| 161 | 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
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| 162 | 16, 16, 16, 16, 16, 17, 17, 17, 17, 17,
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| 163 | 17, 17, 17, 17, 17, 17, 17, 17, 17, 17,
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| 164 | 17, 14, 14, 14, 14, 14, 14, 14, 14, 14,
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| 165 | 14, 14, 14, 14, 14, 15, 15, 15, 15, 15,
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| 166 | 15, 15, 15, 15, 15, 15, 15, 15, 15, 11,
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| 167 | 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,
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| 168 | 11, 9, 9, 9, 9, 9, 9, 9, 9, 9,
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| 169 | 9, 9, 9, 10, 10, 10, 10, 10, 10, 10,
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| 170 | 10, 10, 10, 10, 10, 12, 12, 12, 12, 12,
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| 171 | 12, 12, 12, 12, 12, 12, 12, 8, 8, 8,
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| 172 | 8, 8, 8, 8, 8, 13, 13, 13, 13, 13,
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| 173 | 13, 13, 13, 7, 7, 7, 7, 7, 7, 6,
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| 174 | 6, 6, 6, 6, 5, 5, 5, 5, 4, 4,
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| 175 | 4, 3, 3, 0, 18, 19, 20, 21, 22, 23,
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| 176 | 24, 25, 26, 27, 28, 29, 30, 31,
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| 177 | };
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| 178 | short yycheck[] = { -1,
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| 179 | 0, 257, 258, 265, 266, 267, 268, 269, 270, 271,
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| 180 | 272, 273, 274, 275, 276, 277, 0, 273, 274, 273,
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| 181 | 274, 275, 276, 277, 280, 281, 275, 276, 277, 0,
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| 182 | -1, -1, 0, 267, 268, 269, 270, 271, 272, 273,
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| 183 | 274, 275, 276, 277, -1, -1, 0, 271, 272, 273,
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| 184 | 274, 275, 276, 277, -1, -1, -1, -1, -1, -1,
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| 185 | 0, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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| 186 | -1, -1, 0, -1, -1, -1, -1, -1, -1, -1,
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| 187 | -1, -1, -1, -1, 0, -1, -1, -1, -1, -1,
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| 188 | -1, -1, -1, -1, -1, -1, 0, -1, -1, -1,
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| 189 | -1, -1, -1, -1, -1, -1, -1, -1, 0, -1,
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| 190 | -1, -1, -1, -1, -1, -1, 0, -1, -1, -1,
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| 191 | -1, -1, -1, -1, 0, -1, -1, -1, -1, -1,
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| 192 | 0, -1, -1, -1, -1, 0, -1, -1, -1, 0,
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| 193 | -1, -1, 0, 2, 3, 4, 5, 6, -1, -1,
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| 194 | -1, -1, -1, -1, -1, 14, 15, 16, 17, 18,
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| 195 | 19, 20, 21, 22, 23, 24, 25, 26, 27, 28,
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| 196 | 29, 30, 31, 259, 260, 261, 262, 263, 264, 265,
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| 197 | 266, 267, 268, 269, 270, 271, 272, 273, 274, 275,
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| 198 | 276, 277, 260, 261, 262, 263, 264, 265, 266, 267,
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| 199 | 268, 269, 270, 271, 272, 273, 274, 275, 276, 277,
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| 200 | 261, 262, 263, 264, 265, 266, 267, 268, 269, 270,
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| 201 | 271, 272, 273, 274, 275, 276, 277, 262, 263, 264,
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| 202 | 265, 266, 267, 268, 269, 270, 271, 272, 273, 274,
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| 203 | 275, 276, 277, 263, 264, 265, 266, 267, 268, 269,
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| 204 | 270, 271, 272, 273, 274, 275, 276, 277, -1, 259,
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| 205 | 260, 261, 262, 263, 264, 265, 266, 267, 268, 269,
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| 206 | 270, 271, 272, 273, 274, 259, 260, 261, 262, 263,
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| 207 | 264, 265, 266, 267, 268, 269, 270, 271, 272, 273,
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| 208 | 274, 259, 260, 261, 262, 263, 264, 265, 266, 267,
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| 209 | 268, 269, 270, 271, 272, 259, 260, 261, 262, 263,
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| 210 | 264, 265, 266, 267, 268, 269, 270, 271, 272, 259,
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| 211 | 260, 261, 262, 263, 264, 265, 266, 267, 268, 269,
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| 212 | 270, 259, 260, 261, 262, 263, 264, 265, 266, 267,
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| 213 | 268, 269, 270, 259, 260, 261, 262, 263, 264, 265,
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| 214 | 266, 267, 268, 269, 270, 259, 260, 261, 262, 263,
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| 215 | 264, 265, 266, 267, 268, 269, 270, 259, 260, 261,
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| 216 | 262, 263, 264, 265, 266, 259, 260, 261, 262, 263,
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| 217 | 264, 265, 266, 259, 260, 261, 262, 263, 264, 259,
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| 218 | 260, 261, 262, 263, 259, 260, 261, 262, 259, 260,
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| 219 | 261, 259, 260, -1, 264, 265, 266, 267, 268, 269,
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| 220 | 270, 271, 272, 273, 274, 275, 276, 277,
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| 221 | };
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| 222 | #define YYFINAL 7
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| 223 | #ifndef YYDEBUG
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| 224 | #define YYDEBUG 0
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| 225 | #endif
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| 226 | #define YYMAXTOKEN 281
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| 227 | #if YYDEBUG
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| 228 | char *yyname[] = {
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| 229 | "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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| 230 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
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| 231 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
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| 232 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
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| 233 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
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| 234 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
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| 235 | 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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| 236 | "ARITH_RPAREN","ARITH_OR","ARITH_AND","ARITH_BOR","ARITH_BXOR","ARITH_BAND",
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| 237 | "ARITH_EQ","ARITH_NE","ARITH_LT","ARITH_GT","ARITH_GE","ARITH_LE",
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| 238 | "ARITH_LSHIFT","ARITH_RSHIFT","ARITH_ADD","ARITH_SUB","ARITH_MUL","ARITH_DIV",
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| 239 | "ARITH_REM","ARITH_UNARYMINUS","ARITH_UNARYPLUS","ARITH_NOT","ARITH_BNOT",
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| 240 | };
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| 241 | char *yyrule[] = {
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| 242 | "$accept : exp",
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| 243 | "exp : expr",
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| 244 | "expr : ARITH_LPAREN expr ARITH_RPAREN",
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| 245 | "expr : expr ARITH_OR expr",
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| 246 | "expr : expr ARITH_AND expr",
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| 247 | "expr : expr ARITH_BOR expr",
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| 248 | "expr : expr ARITH_BXOR expr",
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| 249 | "expr : expr ARITH_BAND expr",
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| 250 | "expr : expr ARITH_EQ expr",
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| 251 | "expr : expr ARITH_GT expr",
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| 252 | "expr : expr ARITH_GE expr",
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| 253 | "expr : expr ARITH_LT expr",
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| 254 | "expr : expr ARITH_LE expr",
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| 255 | "expr : expr ARITH_NE expr",
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| 256 | "expr : expr ARITH_LSHIFT expr",
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|---|
| 257 | "expr : expr ARITH_RSHIFT expr",
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|---|
| 258 | "expr : expr ARITH_ADD expr",
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|---|
| 259 | "expr : expr ARITH_SUB expr",
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| 260 | "expr : expr ARITH_MUL expr",
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|---|
| 261 | "expr : expr ARITH_DIV expr",
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|---|
| 262 | "expr : expr ARITH_REM expr",
|
|---|
| 263 | "expr : ARITH_NOT expr",
|
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| 264 | "expr : ARITH_BNOT expr",
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| 265 | "expr : ARITH_SUB expr",
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|---|
| 266 | "expr : ARITH_ADD expr",
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|---|
| 267 | "expr : ARITH_NUM",
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|---|
| 268 | };
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|---|
| 269 | #endif
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|---|
| 270 | #ifndef YYSTYPE
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|---|
| 271 | typedef int YYSTYPE;
|
|---|
| 272 | #endif
|
|---|
| 273 | #ifdef YYSTACKSIZE
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|---|
| 274 | #undef YYMAXDEPTH
|
|---|
| 275 | #define YYMAXDEPTH YYSTACKSIZE
|
|---|
| 276 | #else
|
|---|
| 277 | #ifdef YYMAXDEPTH
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|---|
| 278 | #define YYSTACKSIZE YYMAXDEPTH
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| 279 | #else
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|---|
| 280 | #define YYSTACKSIZE 500
|
|---|
| 281 | #define YYMAXDEPTH 500
|
|---|
| 282 | #endif
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|---|
| 283 | #endif
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|---|
| 284 | int yydebug;
|
|---|
| 285 | int yynerrs;
|
|---|
| 286 | int yyerrflag;
|
|---|
| 287 | int yychar;
|
|---|
| 288 | short *yyssp;
|
|---|
| 289 | YYSTYPE *yyvsp;
|
|---|
| 290 | YYSTYPE yyval;
|
|---|
| 291 | YYSTYPE yylval;
|
|---|
| 292 | short yyss[YYSTACKSIZE];
|
|---|
| 293 | YYSTYPE yyvs[YYSTACKSIZE];
|
|---|
| 294 | #define yystacksize YYSTACKSIZE
|
|---|
| 295 | int
|
|---|
| 296 | arith(s)
|
|---|
| 297 | const char *s;
|
|---|
| 298 | {
|
|---|
| 299 | long result;
|
|---|
| 300 |
|
|---|
| 301 | arith_buf = arith_startbuf = s;
|
|---|
| 302 |
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|---|
| 303 | INTOFF;
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|---|
| 304 | result = yyparse();
|
|---|
| 305 | arith_lex_reset(); /* reprime lex */
|
|---|
| 306 | INTON;
|
|---|
| 307 |
|
|---|
| 308 | return (result);
|
|---|
| 309 | }
|
|---|
| 310 |
|
|---|
| 311 |
|
|---|
| 312 | /*
|
|---|
| 313 | * The exp(1) builtin.
|
|---|
| 314 | */
|
|---|
| 315 | int
|
|---|
| 316 | expcmd(argc, argv)
|
|---|
| 317 | int argc;
|
|---|
| 318 | char **argv;
|
|---|
| 319 | {
|
|---|
| 320 | const char *p;
|
|---|
| 321 | char *concat;
|
|---|
| 322 | char **ap;
|
|---|
| 323 | long i;
|
|---|
| 324 |
|
|---|
| 325 | if (argc > 1) {
|
|---|
| 326 | p = argv[1];
|
|---|
| 327 | if (argc > 2) {
|
|---|
| 328 | /*
|
|---|
| 329 | * concatenate arguments
|
|---|
| 330 | */
|
|---|
| 331 | STARTSTACKSTR(concat);
|
|---|
| 332 | ap = argv + 2;
|
|---|
| 333 | for (;;) {
|
|---|
| 334 | while (*p)
|
|---|
| 335 | STPUTC(*p++, concat);
|
|---|
| 336 | if ((p = *ap++) == NULL)
|
|---|
| 337 | break;
|
|---|
| 338 | STPUTC(' ', concat);
|
|---|
| 339 | }
|
|---|
| 340 | STPUTC('\0', concat);
|
|---|
| 341 | p = grabstackstr(concat);
|
|---|
| 342 | }
|
|---|
| 343 | } else
|
|---|
| 344 | p = "";
|
|---|
| 345 |
|
|---|
| 346 | i = arith(p);
|
|---|
| 347 |
|
|---|
| 348 | out1fmt("%ld\n", i);
|
|---|
| 349 | return (! i);
|
|---|
| 350 | }
|
|---|
| 351 |
|
|---|
| 352 | /*************************/
|
|---|
| 353 | #ifdef TEST_ARITH
|
|---|
| 354 | #include <stdio.h>
|
|---|
| 355 | main(argc, argv)
|
|---|
| 356 | char *argv[];
|
|---|
| 357 | {
|
|---|
| 358 | printf("%d\n", exp(argv[1]));
|
|---|
| 359 | }
|
|---|
| 360 | error(s)
|
|---|
| 361 | char *s;
|
|---|
| 362 | {
|
|---|
| 363 | fprintf(stderr, "exp: %s\n", s);
|
|---|
| 364 | exit(1);
|
|---|
| 365 | }
|
|---|
| 366 | #endif
|
|---|
| 367 |
|
|---|
| 368 | void
|
|---|
| 369 | yyerror(s)
|
|---|
| 370 | const char *s;
|
|---|
| 371 | {
|
|---|
| 372 |
|
|---|
| 373 | yyerrok;
|
|---|
| 374 | yyclearin;
|
|---|
| 375 | arith_lex_reset(); /* reprime lex */
|
|---|
| 376 | error("arithmetic expression: %s: \"%s\"", s, arith_startbuf);
|
|---|
| 377 | /* NOTREACHED */
|
|---|
| 378 | }
|
|---|
| 379 | #define YYABORT goto yyabort
|
|---|
| 380 | #define YYREJECT goto yyabort
|
|---|
| 381 | #define YYACCEPT goto yyaccept
|
|---|
| 382 | #define YYERROR goto yyerrlab
|
|---|
| 383 | #ifdef __cplusplus
|
|---|
| 384 | extern "C" {
|
|---|
| 385 | char * getenv();
|
|---|
| 386 | int yylex();
|
|---|
| 387 | int yyparse();
|
|---|
| 388 | }
|
|---|
| 389 |
|
|---|
| 390 | #endif
|
|---|
| 391 | int
|
|---|
| 392 | #if defined(__STDC__)
|
|---|
| 393 | yyparse(void)
|
|---|
| 394 | #else
|
|---|
| 395 | yyparse()
|
|---|
| 396 | #endif
|
|---|
| 397 | {
|
|---|
| 398 | register int yym, yyn, yystate;
|
|---|
| 399 | #if YYDEBUG
|
|---|
| 400 | register char *yys;
|
|---|
| 401 | #ifndef __cplusplus
|
|---|
| 402 | extern char *getenv();
|
|---|
| 403 | #endif
|
|---|
| 404 |
|
|---|
| 405 | if (yys = getenv("YYDEBUG"))
|
|---|
| 406 | {
|
|---|
| 407 | yyn = *yys;
|
|---|
| 408 | if (yyn >= '0' && yyn <= '9')
|
|---|
| 409 | yydebug = yyn - '0';
|
|---|
| 410 | }
|
|---|
| 411 | #endif
|
|---|
| 412 |
|
|---|
| 413 | yynerrs = 0;
|
|---|
| 414 | yyerrflag = 0;
|
|---|
| 415 | yychar = (-1);
|
|---|
| 416 |
|
|---|
| 417 | yyssp = yyss;
|
|---|
| 418 | yyvsp = yyvs;
|
|---|
| 419 | *yyssp = yystate = 0;
|
|---|
| 420 |
|
|---|
| 421 | yyloop:
|
|---|
| 422 | if ((yyn = yydefred[yystate]) != 0) goto yyreduce;
|
|---|
| 423 | if (yychar < 0)
|
|---|
| 424 | {
|
|---|
| 425 | if ((yychar = yylex()) < 0) yychar = 0;
|
|---|
| 426 | #if YYDEBUG
|
|---|
| 427 | if (yydebug)
|
|---|
| 428 | {
|
|---|
| 429 | yys = 0;
|
|---|
| 430 | if (yychar <= YYMAXTOKEN) yys = yyname[yychar];
|
|---|
| 431 | if (!yys) yys = "illegal-symbol";
|
|---|
| 432 | printf("%sdebug: state %d, reading %d (%s)\n",
|
|---|
| 433 | YYPREFIX, yystate, yychar, yys);
|
|---|
| 434 | }
|
|---|
| 435 | #endif
|
|---|
| 436 | }
|
|---|
| 437 | if ((yyn = yysindex[yystate]) && (yyn += yychar) >= 0 &&
|
|---|
| 438 | yyn <= YYTABLESIZE && yycheck[yyn] == yychar)
|
|---|
| 439 | {
|
|---|
| 440 | #if YYDEBUG
|
|---|
| 441 | if (yydebug)
|
|---|
| 442 | printf("%sdebug: state %d, shifting to state %d\n",
|
|---|
| 443 | YYPREFIX, yystate, yytable[yyn]);
|
|---|
| 444 | #endif
|
|---|
| 445 | if (yyssp >= yyss + yystacksize - 1)
|
|---|
| 446 | {
|
|---|
| 447 | goto yyoverflow;
|
|---|
| 448 | }
|
|---|
| 449 | *++yyssp = yystate = yytable[yyn];
|
|---|
| 450 | *++yyvsp = yylval;
|
|---|
| 451 | yychar = (-1);
|
|---|
| 452 | if (yyerrflag > 0) --yyerrflag;
|
|---|
| 453 | goto yyloop;
|
|---|
| 454 | }
|
|---|
| 455 | if ((yyn = yyrindex[yystate]) && (yyn += yychar) >= 0 &&
|
|---|
| 456 | yyn <= YYTABLESIZE && yycheck[yyn] == yychar)
|
|---|
| 457 | {
|
|---|
| 458 | yyn = yytable[yyn];
|
|---|
| 459 | goto yyreduce;
|
|---|
| 460 | }
|
|---|
| 461 | if (yyerrflag) goto yyinrecovery;
|
|---|
| 462 | yyerror("syntax error");
|
|---|
| 463 | #ifdef lint
|
|---|
| 464 | goto yyerrlab;
|
|---|
| 465 | #endif
|
|---|
| 466 | yyerrlab:
|
|---|
| 467 | ++yynerrs;
|
|---|
| 468 | yyinrecovery:
|
|---|
| 469 | if (yyerrflag < 3)
|
|---|
| 470 | {
|
|---|
| 471 | yyerrflag = 3;
|
|---|
| 472 | for (;;)
|
|---|
| 473 | {
|
|---|
| 474 | if ((yyn = yysindex[*yyssp]) && (yyn += YYERRCODE) >= 0 &&
|
|---|
| 475 | yyn <= YYTABLESIZE && yycheck[yyn] == YYERRCODE)
|
|---|
| 476 | {
|
|---|
| 477 | #if YYDEBUG
|
|---|
| 478 | if (yydebug)
|
|---|
| 479 | printf("%sdebug: state %d, error recovery shifting\
|
|---|
| 480 | to state %d\n", YYPREFIX, *yyssp, yytable[yyn]);
|
|---|
| 481 | #endif
|
|---|
| 482 | if (yyssp >= yyss + yystacksize - 1)
|
|---|
| 483 | {
|
|---|
| 484 | goto yyoverflow;
|
|---|
| 485 | }
|
|---|
| 486 | *++yyssp = yystate = yytable[yyn];
|
|---|
| 487 | *++yyvsp = yylval;
|
|---|
| 488 | goto yyloop;
|
|---|
| 489 | }
|
|---|
| 490 | else
|
|---|
| 491 | {
|
|---|
| 492 | #if YYDEBUG
|
|---|
| 493 | if (yydebug)
|
|---|
| 494 | printf("%sdebug: error recovery discarding state %d\n",
|
|---|
| 495 | YYPREFIX, *yyssp);
|
|---|
| 496 | #endif
|
|---|
| 497 | if (yyssp <= yyss) goto yyabort;
|
|---|
| 498 | --yyssp;
|
|---|
| 499 | --yyvsp;
|
|---|
| 500 | }
|
|---|
| 501 | }
|
|---|
| 502 | }
|
|---|
| 503 | else
|
|---|
| 504 | {
|
|---|
| 505 | if (yychar == 0) goto yyabort;
|
|---|
| 506 | #if YYDEBUG
|
|---|
| 507 | if (yydebug)
|
|---|
| 508 | {
|
|---|
| 509 | yys = 0;
|
|---|
| 510 | if (yychar <= YYMAXTOKEN) yys = yyname[yychar];
|
|---|
| 511 | if (!yys) yys = "illegal-symbol";
|
|---|
| 512 | printf("%sdebug: state %d, error recovery discards token %d (%s)\n",
|
|---|
| 513 | YYPREFIX, yystate, yychar, yys);
|
|---|
| 514 | }
|
|---|
| 515 | #endif
|
|---|
| 516 | yychar = (-1);
|
|---|
| 517 | goto yyloop;
|
|---|
| 518 | }
|
|---|
| 519 | yyreduce:
|
|---|
| 520 | #if YYDEBUG
|
|---|
| 521 | if (yydebug)
|
|---|
| 522 | printf("%sdebug: state %d, reducing by rule %d (%s)\n",
|
|---|
| 523 | YYPREFIX, yystate, yyn, yyrule[yyn]);
|
|---|
| 524 | #endif
|
|---|
| 525 | yym = yylen[yyn];
|
|---|
| 526 | yyval = yyvsp[1-yym];
|
|---|
| 527 | switch (yyn)
|
|---|
| 528 | {
|
|---|
| 529 | case 1:
|
|---|
| 530 | {
|
|---|
| 531 | return (yyvsp[0]);
|
|---|
| 532 | }
|
|---|
| 533 | break;
|
|---|
| 534 | case 2:
|
|---|
| 535 | { yyval = yyvsp[-1]; }
|
|---|
| 536 | break;
|
|---|
| 537 | case 3:
|
|---|
| 538 | { yyval = yyvsp[-2] ? yyvsp[-2] : yyvsp[0] ? yyvsp[0] : 0; }
|
|---|
| 539 | break;
|
|---|
| 540 | case 4:
|
|---|
| 541 | { yyval = yyvsp[-2] ? ( yyvsp[0] ? yyvsp[0] : 0 ) : 0; }
|
|---|
| 542 | break;
|
|---|
| 543 | case 5:
|
|---|
| 544 | { yyval = yyvsp[-2] | yyvsp[0]; }
|
|---|
| 545 | break;
|
|---|
| 546 | case 6:
|
|---|
| 547 | { yyval = yyvsp[-2] ^ yyvsp[0]; }
|
|---|
| 548 | break;
|
|---|
| 549 | case 7:
|
|---|
| 550 | { yyval = yyvsp[-2] & yyvsp[0]; }
|
|---|
| 551 | break;
|
|---|
| 552 | case 8:
|
|---|
| 553 | { yyval = yyvsp[-2] == yyvsp[0]; }
|
|---|
| 554 | break;
|
|---|
| 555 | case 9:
|
|---|
| 556 | { yyval = yyvsp[-2] > yyvsp[0]; }
|
|---|
| 557 | break;
|
|---|
| 558 | case 10:
|
|---|
| 559 | { yyval = yyvsp[-2] >= yyvsp[0]; }
|
|---|
| 560 | break;
|
|---|
| 561 | case 11:
|
|---|
| 562 | { yyval = yyvsp[-2] < yyvsp[0]; }
|
|---|
| 563 | break;
|
|---|
| 564 | case 12:
|
|---|
| 565 | { yyval = yyvsp[-2] <= yyvsp[0]; }
|
|---|
| 566 | break;
|
|---|
| 567 | case 13:
|
|---|
| 568 | { yyval = yyvsp[-2] != yyvsp[0]; }
|
|---|
| 569 | break;
|
|---|
| 570 | case 14:
|
|---|
| 571 | { yyval = yyvsp[-2] << yyvsp[0]; }
|
|---|
| 572 | break;
|
|---|
| 573 | case 15:
|
|---|
| 574 | { yyval = yyvsp[-2] >> yyvsp[0]; }
|
|---|
| 575 | break;
|
|---|
| 576 | case 16:
|
|---|
| 577 | { yyval = yyvsp[-2] + yyvsp[0]; }
|
|---|
| 578 | break;
|
|---|
| 579 | case 17:
|
|---|
| 580 | { yyval = yyvsp[-2] - yyvsp[0]; }
|
|---|
| 581 | break;
|
|---|
| 582 | case 18:
|
|---|
| 583 | { yyval = yyvsp[-2] * yyvsp[0]; }
|
|---|
| 584 | break;
|
|---|
| 585 | case 19:
|
|---|
| 586 | {
|
|---|
| 587 | if (yyvsp[0] == 0)
|
|---|
| 588 | yyerror("division by zero");
|
|---|
| 589 | yyval = yyvsp[-2] / yyvsp[0];
|
|---|
| 590 | }
|
|---|
| 591 | break;
|
|---|
| 592 | case 20:
|
|---|
| 593 | {
|
|---|
| 594 | if (yyvsp[0] == 0)
|
|---|
| 595 | yyerror("division by zero");
|
|---|
| 596 | yyval = yyvsp[-2] % yyvsp[0];
|
|---|
| 597 | }
|
|---|
| 598 | break;
|
|---|
| 599 | case 21:
|
|---|
| 600 | { yyval = !(yyvsp[0]); }
|
|---|
| 601 | break;
|
|---|
| 602 | case 22:
|
|---|
| 603 | { yyval = ~(yyvsp[0]); }
|
|---|
| 604 | break;
|
|---|
| 605 | case 23:
|
|---|
| 606 | { yyval = -(yyvsp[0]); }
|
|---|
| 607 | break;
|
|---|
| 608 | case 24:
|
|---|
| 609 | { yyval = yyvsp[0]; }
|
|---|
| 610 | break;
|
|---|
| 611 | }
|
|---|
| 612 | yyssp -= yym;
|
|---|
| 613 | yystate = *yyssp;
|
|---|
| 614 | yyvsp -= yym;
|
|---|
| 615 | yym = yylhs[yyn];
|
|---|
| 616 | if (yystate == 0 && yym == 0)
|
|---|
| 617 | {
|
|---|
| 618 | #if YYDEBUG
|
|---|
| 619 | if (yydebug)
|
|---|
| 620 | printf("%sdebug: after reduction, shifting from state 0 to\
|
|---|
| 621 | state %d\n", YYPREFIX, YYFINAL);
|
|---|
| 622 | #endif
|
|---|
| 623 | yystate = YYFINAL;
|
|---|
| 624 | *++yyssp = YYFINAL;
|
|---|
| 625 | *++yyvsp = yyval;
|
|---|
| 626 | if (yychar < 0)
|
|---|
| 627 | {
|
|---|
| 628 | if ((yychar = yylex()) < 0) yychar = 0;
|
|---|
| 629 | #if YYDEBUG
|
|---|
| 630 | if (yydebug)
|
|---|
| 631 | {
|
|---|
| 632 | yys = 0;
|
|---|
| 633 | if (yychar <= YYMAXTOKEN) yys = yyname[yychar];
|
|---|
| 634 | if (!yys) yys = "illegal-symbol";
|
|---|
| 635 | printf("%sdebug: state %d, reading %d (%s)\n",
|
|---|
| 636 | YYPREFIX, YYFINAL, yychar, yys);
|
|---|
| 637 | }
|
|---|
| 638 | #endif
|
|---|
| 639 | }
|
|---|
| 640 | if (yychar == 0) goto yyaccept;
|
|---|
| 641 | goto yyloop;
|
|---|
| 642 | }
|
|---|
| 643 | if ((yyn = yygindex[yym]) && (yyn += yystate) >= 0 &&
|
|---|
| 644 | yyn <= YYTABLESIZE && yycheck[yyn] == yystate)
|
|---|
| 645 | yystate = yytable[yyn];
|
|---|
| 646 | else
|
|---|
| 647 | yystate = yydgoto[yym];
|
|---|
| 648 | #if YYDEBUG
|
|---|
| 649 | if (yydebug)
|
|---|
| 650 | printf("%sdebug: after reduction, shifting from state %d \
|
|---|
| 651 | to state %d\n", YYPREFIX, *yyssp, yystate);
|
|---|
| 652 | #endif
|
|---|
| 653 | if (yyssp >= yyss + yystacksize - 1)
|
|---|
| 654 | {
|
|---|
| 655 | goto yyoverflow;
|
|---|
| 656 | }
|
|---|
| 657 | *++yyssp = yystate;
|
|---|
| 658 | *++yyvsp = yyval;
|
|---|
| 659 | goto yyloop;
|
|---|
| 660 | yyoverflow:
|
|---|
| 661 | yyerror("yacc stack overflow");
|
|---|
| 662 | yyabort:
|
|---|
| 663 | return (1);
|
|---|
| 664 | yyaccept:
|
|---|
| 665 | return (0);
|
|---|
| 666 | }
|
|---|
