[BACK]Return to regerror.c CVS log [TXT][DIR] Up to [cvs.NetBSD.org] / src / lib / libc / regex

File: [cvs.NetBSD.org] / src / lib / libc / regex / regerror.c (download)

Revision 1.23, Fri Feb 9 23:44:18 2007 UTC (7 years, 7 months ago) by junyoung
Branch: MAIN
CVS Tags: yamt-pf42-baseX, yamt-pf42-base4, yamt-pf42-base3, yamt-pf42-base2, yamt-pf42-base, yamt-pf42, yamt-pagecache-tag8, yamt-pagecache-base9, yamt-pagecache-base8, yamt-pagecache-base7, yamt-pagecache-base6, yamt-pagecache-base5, yamt-pagecache-base4, yamt-pagecache-base3, yamt-pagecache-base2, yamt-pagecache-base, yamt-pagecache, wrstuden-revivesa-base-3, wrstuden-revivesa-base-2, wrstuden-revivesa-base-1, wrstuden-revivesa-base, wrstuden-revivesa, tls-maxphys-base, tls-maxphys, tls-earlyentropy-base, tls-earlyentropy, riastradh-xf86-video-intel-2-7-1-pre-2-21-15, riastradh-drm2-base3, riastradh-drm2-base2, riastradh-drm2-base1, riastradh-drm2-base, riastradh-drm2, netbsd-7-base, netbsd-7, netbsd-6-base, netbsd-6-1-RELEASE, netbsd-6-1-RC4, netbsd-6-1-RC3, netbsd-6-1-RC2, netbsd-6-1-RC1, netbsd-6-1-4-RELEASE, netbsd-6-1-3-RELEASE, netbsd-6-1-2-RELEASE, netbsd-6-1-1-RELEASE, netbsd-6-1, netbsd-6-0-RELEASE, netbsd-6-0-RC2, netbsd-6-0-RC1, netbsd-6-0-5-RELEASE, netbsd-6-0-4-RELEASE, netbsd-6-0-3-RELEASE, netbsd-6-0-2-RELEASE, netbsd-6-0-1-RELEASE, netbsd-6-0, netbsd-6, netbsd-5-base, netbsd-5-2-RELEASE, netbsd-5-2-RC1, netbsd-5-2-2-RELEASE, netbsd-5-2-1-RELEASE, netbsd-5-2, netbsd-5-1-RELEASE, netbsd-5-1-RC4, netbsd-5-1-RC3, netbsd-5-1-RC2, netbsd-5-1-RC1, netbsd-5-1-4-RELEASE, netbsd-5-1-3-RELEASE, netbsd-5-1-2-RELEASE, netbsd-5-1-1-RELEASE, netbsd-5-1, netbsd-5-0-RELEASE, netbsd-5-0-RC4, netbsd-5-0-RC3, netbsd-5-0-RC2, netbsd-5-0-RC1, netbsd-5-0-2-RELEASE, netbsd-5-0-1-RELEASE, netbsd-5-0, netbsd-5, mjf-devfs2-base, mjf-devfs2, matt-premerge-20091211, matt-nb6-plus-nbase, matt-nb6-plus-base, matt-nb6-plus, matt-nb5-pq3-base, matt-nb5-pq3, matt-nb5-mips64-u2-k2-k4-k7-k8-k9, matt-nb5-mips64-u1-k1-k5, matt-nb5-mips64-premerge-20101231, matt-nb5-mips64-premerge-20091211, matt-nb5-mips64-k15, matt-nb5-mips64, matt-nb4-mips64-k7-u2a-k9b, matt-mips64-premerge-20101231, matt-mips64-base2, matt-mips64-base, matt-mips64, matt-armv6-prevmlocking, matt-armv6-nbase, matt-armv6-base, matt-armv6, keiichi-mipv6-base, keiichi-mipv6, jym-xensuspend-nbase, jym-xensuspend-base, jym-xensuspend, hpcarm-cleanup-nbase, hpcarm-cleanup-base, hpcarm-cleanup, cube-autoconf-base, cube-autoconf, christos-time_t-nbase, christos-time_t-base, christos-time_t, cherry-xenmp-base, cherry-xenmp, bouyer-quota2-nbase, bouyer-quota2-base, bouyer-quota2, agc-symver-base, agc-symver, HEAD
Changes since 1.22: +3 -3 lines

Rearrange headers for better portability.

/*	$NetBSD: regerror.c,v 1.23 2007/02/09 23:44:18 junyoung Exp $	*/

/*-
 * Copyright (c) 1992, 1993, 1994
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Henry Spencer.
 *
 * 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.
 *
 *	@(#)regerror.c	8.4 (Berkeley) 3/20/94
 */

/*-
 * Copyright (c) 1992, 1993, 1994 Henry Spencer.
 *
 * This code is derived from software contributed to Berkeley by
 * Henry Spencer.
 *
 * 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. 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.
 *
 *	@(#)regerror.c	8.4 (Berkeley) 3/20/94
 */

#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
#if 0
static char sccsid[] = "@(#)regerror.c	8.4 (Berkeley) 3/20/94";
#else
__RCSID("$NetBSD: regerror.c,v 1.23 2007/02/09 23:44:18 junyoung Exp $");
#endif
#endif /* LIBC_SCCS and not lint */

#include "namespace.h"
#include <sys/types.h>

#include <assert.h>
#include <ctype.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <regex.h>

#ifdef __weak_alias
__weak_alias(regerror,_regerror)
#endif

#include "utils.h"

/* ========= begin header generated by ./mkh ========= */
#ifdef __cplusplus
extern "C" {
#endif

/* === regerror.c === */
static const char *regatoi(const regex_t *preg, char *localbuf, size_t buflen);

#ifdef __cplusplus
}
#endif
/* ========= end header generated by ./mkh ========= */
/*
 = #define	REG_NOMATCH	 1
 = #define	REG_BADPAT	 2
 = #define	REG_ECOLLATE	 3
 = #define	REG_ECTYPE	 4
 = #define	REG_EESCAPE	 5
 = #define	REG_ESUBREG	 6
 = #define	REG_EBRACK	 7
 = #define	REG_EPAREN	 8
 = #define	REG_EBRACE	 9
 = #define	REG_BADBR	10
 = #define	REG_ERANGE	11
 = #define	REG_ESPACE	12
 = #define	REG_BADRPT	13
 = #define	REG_EMPTY	14
 = #define	REG_ASSERT	15
 = #define	REG_INVARG	16
 = #define	REG_ATOI	255	// convert name to number (!)
 = #define	REG_ITOA	0400	// convert number to name (!)
 */
static const struct rerr {
	int code;
	const char *name;
	const char *explain;
} rerrs[] = {
	{ REG_NOMATCH,	"REG_NOMATCH",	"regexec() failed to match" },
	{ REG_BADPAT,	"REG_BADPAT",	"invalid regular expression" },
	{ REG_ECOLLATE,	"REG_ECOLLATE",	"invalid collating element" },
	{ REG_ECTYPE,	"REG_ECTYPE",	"invalid character class" },
	{ REG_EESCAPE,	"REG_EESCAPE",	"trailing backslash (\\)" },
	{ REG_ESUBREG,	"REG_ESUBREG",	"invalid backreference number" },
	{ REG_EBRACK,	"REG_EBRACK",	"brackets ([ ]) not balanced" },
	{ REG_EPAREN,	"REG_EPAREN",	"parentheses not balanced" },
	{ REG_EBRACE,	"REG_EBRACE",	"braces not balanced" },
	{ REG_BADBR,	"REG_BADBR",	"invalid repetition count(s)" },
	{ REG_ERANGE,	"REG_ERANGE",	"invalid character range" },
	{ REG_ESPACE,	"REG_ESPACE",	"out of memory" },
	{ REG_BADRPT,	"REG_BADRPT",	"repetition-operator operand invalid" },
	{ REG_EMPTY,	"REG_EMPTY",	"empty (sub)expression" },
	{ REG_ASSERT,	"REG_ASSERT",	"\"can't happen\" -- you found a bug" },
	{ REG_INVARG,	"REG_INVARG",	"invalid argument to regex routine" },
	{ 0,		"",		"*** unknown regexp error code ***" }
};

/*
 * regerror - the interface to error numbers
 * extern size_t regerror(int, const regex_t *, char *, size_t);
 */
/* ARGSUSED */
size_t
regerror(
    int errcode,
    const regex_t *preg,
    char *errbuf,
    size_t errbuf_size)
{
	const struct rerr *r;
	size_t len;
	int target = errcode &~ REG_ITOA;
	const char *s;
	char convbuf[50];

	_DIAGASSERT(errcode != REG_ATOI || preg != NULL);
	_DIAGASSERT(errbuf != NULL);

	if (errcode == REG_ATOI)
		s = regatoi(preg, convbuf, sizeof convbuf);
	else {
		for (r = rerrs; r->code != 0; r++)
			if (r->code == target)
				break;
	
		if (errcode & REG_ITOA) {
			if (r->code != 0) {
				(void)strlcpy(convbuf, r->name, sizeof convbuf);
			} else
				(void)snprintf(convbuf, sizeof convbuf,
				    "REG_0x%x", target);
			s = convbuf;
		} else
			s = r->explain;
	}

	len = strlen(s) + 1;
	if (errbuf_size > 0)
		(void)strlcpy(errbuf, s, errbuf_size);

	return(len);
}

/*
 * regatoi - internal routine to implement REG_ATOI
 * static const char *regatoi(const regex_t *preg, char *localbuf,
 * size_t buflen);
 */
static const char *
regatoi(
    const regex_t *preg,
    char *localbuf,
    size_t buflen)
{
	const struct rerr *r;

	for (r = rerrs; r->code != 0; r++)
		if (strcmp(r->name, preg->re_endp) == 0)
			break;
	if (r->code == 0)
		return "0";

	(void)snprintf(localbuf, buflen, "%d", r->code);
	return localbuf;
}