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46 lines
1.3 KiB
C
46 lines
1.3 KiB
C
/* $OpenBSD: expr.c,v 1.18 2010/09/07 19:58:09 marco Exp $ */
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/*
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* Copyright (c) 2004 Marc Espie <espie@cvs.openbsd.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/cdefs.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stddef.h>
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#include "mdef.h"
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#include "extern.h"
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int32_t end_result;
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static const char *copy_toeval;
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int yyerror(const char *msg);
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extern void yy_scan_string(const char *);
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extern int yyparse(void);
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int
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yyerror(const char *msg)
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{
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fprintf(stderr, "m4: %s in expr %s\n", msg, copy_toeval);
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return(0);
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}
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int
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expr(const char *toeval)
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{
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copy_toeval = toeval;
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yy_scan_string(toeval);
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yyparse();
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return end_result;
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}
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