diff options
Diffstat (limited to 'usr.bin/m4/expr.c')
-rw-r--r-- | usr.bin/m4/expr.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/usr.bin/m4/expr.c b/usr.bin/m4/expr.c new file mode 100644 index 0000000..a6c901f --- /dev/null +++ b/usr.bin/m4/expr.c @@ -0,0 +1,50 @@ +/* $NetBSD: expr.c,v 1.19 2009/10/26 21:11:28 christos Exp $ */ +/* $OpenBSD: expr.c,v 1.17 2006/01/20 23:10:19 espie 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. + */ +#if HAVE_NBTOOL_CONFIG_H +#include "nbtool_config.h" +#endif +#include <sys/cdefs.h> +__RCSID("$NetBSD: expr.c,v 1.19 2009/10/26 21:11:28 christos Exp $"); +#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); +extern int yyerror(const char *); + +int +yyerror(const char *msg) +{ + fprintf(stderr, "m4: %s in expr %s\n", msg, copy_toeval); + return(0); +} + +int +expr(const char *toeval) +{ + copy_toeval = toeval; + yy_scan_string(toeval); + yyparse(); + return end_result; +} |