224 lines
7.4 KiB
C
224 lines
7.4 KiB
C
/* $NetBSD: regerror.c,v 1.23 2007/02/09 23:44:18 junyoung Exp $ */
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/*-
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* Copyright (c) 1992, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Henry Spencer.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)regerror.c 8.4 (Berkeley) 3/20/94
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*/
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/*-
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* Copyright (c) 1992, 1993, 1994 Henry Spencer.
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*
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* This code is derived from software contributed to Berkeley by
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* Henry Spencer.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)regerror.c 8.4 (Berkeley) 3/20/94
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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#if 0
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static char sccsid[] = "@(#)regerror.c 8.4 (Berkeley) 3/20/94";
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#else
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__RCSID("$NetBSD: regerror.c,v 1.23 2007/02/09 23:44:18 junyoung Exp $");
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#endif
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#endif /* LIBC_SCCS and not lint */
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#include "namespace.h"
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#include <sys/types.h>
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#include <assert.h>
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#include <ctype.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <regex.h>
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#ifdef __weak_alias
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__weak_alias(regerror,_regerror)
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#endif
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#include "utils.h"
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/* ========= begin header generated by ./mkh ========= */
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* === regerror.c === */
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static const char *regatoi(const regex_t *preg, char *localbuf, size_t buflen);
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#ifdef __cplusplus
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}
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#endif
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/* ========= end header generated by ./mkh ========= */
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/*
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= #define REG_NOMATCH 1
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= #define REG_BADPAT 2
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= #define REG_ECOLLATE 3
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= #define REG_ECTYPE 4
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= #define REG_EESCAPE 5
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= #define REG_ESUBREG 6
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= #define REG_EBRACK 7
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= #define REG_EPAREN 8
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= #define REG_EBRACE 9
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= #define REG_BADBR 10
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= #define REG_ERANGE 11
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= #define REG_ESPACE 12
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= #define REG_BADRPT 13
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= #define REG_EMPTY 14
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= #define REG_ASSERT 15
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= #define REG_INVARG 16
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= #define REG_ATOI 255 // convert name to number (!)
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= #define REG_ITOA 0400 // convert number to name (!)
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*/
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static const struct rerr {
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int code;
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const char *name;
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const char *explain;
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} rerrs[] = {
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{ REG_NOMATCH, "REG_NOMATCH", "regexec() failed to match" },
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{ REG_BADPAT, "REG_BADPAT", "invalid regular expression" },
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{ REG_ECOLLATE, "REG_ECOLLATE", "invalid collating element" },
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{ REG_ECTYPE, "REG_ECTYPE", "invalid character class" },
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{ REG_EESCAPE, "REG_EESCAPE", "trailing backslash (\\)" },
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{ REG_ESUBREG, "REG_ESUBREG", "invalid backreference number" },
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{ REG_EBRACK, "REG_EBRACK", "brackets ([ ]) not balanced" },
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{ REG_EPAREN, "REG_EPAREN", "parentheses not balanced" },
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{ REG_EBRACE, "REG_EBRACE", "braces not balanced" },
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{ REG_BADBR, "REG_BADBR", "invalid repetition count(s)" },
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{ REG_ERANGE, "REG_ERANGE", "invalid character range" },
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{ REG_ESPACE, "REG_ESPACE", "out of memory" },
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{ REG_BADRPT, "REG_BADRPT", "repetition-operator operand invalid" },
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{ REG_EMPTY, "REG_EMPTY", "empty (sub)expression" },
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{ REG_ASSERT, "REG_ASSERT", "\"can't happen\" -- you found a bug" },
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{ REG_INVARG, "REG_INVARG", "invalid argument to regex routine" },
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{ 0, "", "*** unknown regexp error code ***" }
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};
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/*
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* regerror - the interface to error numbers
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* extern size_t regerror(int, const regex_t *, char *, size_t);
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*/
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/* ARGSUSED */
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size_t
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regerror(
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int errcode,
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const regex_t *preg,
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char *errbuf,
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size_t errbuf_size)
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{
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const struct rerr *r;
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size_t len;
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int target = errcode &~ REG_ITOA;
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const char *s;
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char convbuf[50];
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_DIAGASSERT(errcode != REG_ATOI || preg != NULL);
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_DIAGASSERT(errbuf != NULL);
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if (errcode == REG_ATOI)
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s = regatoi(preg, convbuf, sizeof convbuf);
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else {
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for (r = rerrs; r->code != 0; r++)
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if (r->code == target)
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break;
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if (errcode & REG_ITOA) {
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if (r->code != 0) {
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(void)strlcpy(convbuf, r->name, sizeof convbuf);
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} else
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(void)snprintf(convbuf, sizeof convbuf,
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"REG_0x%x", target);
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s = convbuf;
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} else
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s = r->explain;
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}
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len = strlen(s) + 1;
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if (errbuf_size > 0)
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(void)strlcpy(errbuf, s, errbuf_size);
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return(len);
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}
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/*
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* regatoi - internal routine to implement REG_ATOI
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* static const char *regatoi(const regex_t *preg, char *localbuf,
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* size_t buflen);
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*/
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static const char *
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regatoi(
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const regex_t *preg,
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char *localbuf,
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size_t buflen)
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{
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const struct rerr *r;
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for (r = rerrs; r->code != 0; r++)
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if (strcmp(r->name, preg->re_endp) == 0)
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break;
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if (r->code == 0)
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return "0";
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(void)snprintf(localbuf, buflen, "%d", r->code);
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return localbuf;
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}
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