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Linux (musl ABI) build of the OpenBSD m4 program
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1234567891011121314151617181920212223242526272829303132333435363738394041424344/* $OpenBSD: expr.c,v 1.18 2010/09/07 19:58:09 marco Exp $ *//* * Copyright (c) 2004 Marc Espie <espie@cvs.openbsd.org> * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */#include <stdint.h>#include <stdio.h>#include <stddef.h>#include "mdef.h"#include "extern.h"
int32_t end_result;const char *copy_toeval;
extern void yy_scan_string(const char *);extern int yyparse(void);
intyyerror(const char *msg){ fprintf(stderr, "m4: %s in expr %s\n", msg, copy_toeval); return(0);}
intexpr(const char *toeval){ copy_toeval = toeval; yy_scan_string(toeval); yyparse(); return end_result;}