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Diffstat (limited to '')
| -rw-r--r-- | src/arith.y | 155 |
1 files changed, 0 insertions, 155 deletions
diff --git a/src/arith.y b/src/arith.y deleted file mode 100644 index 07b0b39..0000000 --- a/src/arith.y +++ /dev/null @@ -1,155 +0,0 @@ -%{ -/*- - * Copyright (c) 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. 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. - */ - -#include <stdlib.h> -#include "expand.h" -#include "shell.h" -#include "error.h" -#include "output.h" -#include "memalloc.h" - -const char *arith_buf, *arith_startbuf; - -#ifndef YYBISON -int yyparse(void); -#endif -void yyerror(const char *); -#ifdef TESTARITH -int main(int , char *[]); -int sh_error(char *); -#endif - -%} -%token ARITH_NUM ARITH_LPAREN ARITH_RPAREN - -%left ARITH_OR -%left ARITH_AND -%left ARITH_BOR -%left ARITH_BXOR -%left ARITH_BAND -%left ARITH_EQ ARITH_NE -%left ARITH_LT ARITH_GT ARITH_GE ARITH_LE -%left ARITH_LSHIFT ARITH_RSHIFT -%left ARITH_ADD ARITH_SUB -%left ARITH_MUL ARITH_DIV ARITH_REM -%left ARITH_UNARYMINUS ARITH_UNARYPLUS ARITH_NOT ARITH_BNOT -%% - -exp: expr { - return ($1); - } - ; - - -expr: ARITH_LPAREN expr ARITH_RPAREN { $$ = $2; } - | expr ARITH_OR expr { $$ = $1 || $3; } - | expr ARITH_AND expr { $$ = $1 && $3; } - | expr ARITH_BOR expr { $$ = $1 | $3; } - | expr ARITH_BXOR expr { $$ = $1 ^ $3; } - | expr ARITH_BAND expr { $$ = $1 & $3; } - | expr ARITH_EQ expr { $$ = $1 == $3; } - | expr ARITH_GT expr { $$ = $1 > $3; } - | expr ARITH_GE expr { $$ = $1 >= $3; } - | expr ARITH_LT expr { $$ = $1 < $3; } - | expr ARITH_LE expr { $$ = $1 <= $3; } - | expr ARITH_NE expr { $$ = $1 != $3; } - | expr ARITH_LSHIFT expr { $$ = $1 << $3; } - | expr ARITH_RSHIFT expr { $$ = $1 >> $3; } - | expr ARITH_ADD expr { $$ = $1 + $3; } - | expr ARITH_SUB expr { $$ = $1 - $3; } - | expr ARITH_MUL expr { $$ = $1 * $3; } - | expr ARITH_DIV expr { - if ($3 == 0) - yyerror("division by zero"); - $$ = $1 / $3; - } - | expr ARITH_REM expr { - if ($3 == 0) - yyerror("division by zero"); - $$ = $1 % $3; - } - | ARITH_NOT expr { $$ = !($2); } - | ARITH_BNOT expr { $$ = ~($2); } - | ARITH_SUB expr %prec ARITH_UNARYMINUS { $$ = -($2); } - | ARITH_ADD expr %prec ARITH_UNARYPLUS { $$ = $2; } - | ARITH_NUM - ; -%% -int -arith(s) - const char *s; -{ - long result; - - arith_buf = arith_startbuf = s; - - INTOFF; - result = yyparse(); - arith_lex_reset(); /* reprime lex */ - INTON; - - return (result); -} - - -/*************************/ -#ifdef TEST_ARITH -#include <stdio.h> -main(argc, argv) - char *argv[]; -{ - printf("%d\n", exp(argv[1])); -} -sh_error(s) - char *s; -{ - fprintf(stderr, "exp: %s\n", s); - exit(1); -} -#endif - -void -yyerror(s) - const char *s; -{ - -#ifndef YYBISON - yyerrok; -#endif - yyclearin; - arith_lex_reset(); /* reprime lex */ - sh_error("arithmetic expression: %s: \"%s\"", s, arith_startbuf); - /* NOTREACHED */ -} |