NetBSD-5.0.2/lib/libc/regex/regerror.c
/* $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;
}