expr.c revision 256281
1/* $OpenBSD: expr.c,v 1.18 2010/09/07 19:58:09 marco Exp $ */ 2/* 3 * Copyright (c) 2004 Marc Espie <espie@cvs.openbsd.org> 4 * 5 * Permission to use, copy, modify, and distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17#include <sys/cdefs.h> 18__FBSDID("$FreeBSD: stable/10/usr.bin/m4/expr.c 241777 2012-10-20 10:33:15Z ed $"); 19 20#include <stdint.h> 21#include <stdio.h> 22#include <stddef.h> 23#include "mdef.h" 24#include "extern.h" 25 26int32_t end_result; 27static const char *copy_toeval; 28int yyerror(const char *msg); 29 30extern void yy_scan_string(const char *); 31extern int yyparse(void); 32 33int 34yyerror(const char *msg) 35{ 36 fprintf(stderr, "m4: %s in expr %s\n", msg, copy_toeval); 37 return(0); 38} 39 40int 41expr(const char *toeval) 42{ 43 copy_toeval = toeval; 44 yy_scan_string(toeval); 45 yyparse(); 46 return end_result; 47} 48