[apple/libc.git] / regex / regerror.c

/*
 * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this
 * file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*
 * 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. 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.
 */

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)regerror.c	8.4 (Berkeley) 3/20/94";
#endif /* LIBC_SCCS and not lint */

#include <sys/types.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <limits.h>
#include <stdlib.h>
#include <regex.h>

#include "utils.h"

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

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

#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 struct rerr {
	int code;
	char *name;
	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(errcode, preg, errbuf, errbuf_size)
int errcode;
const regex_t *preg;
char *errbuf;
size_t errbuf_size;
{
	register struct rerr *r;
	register size_t len;
	register int target = errcode &~ REG_ITOA;
	register char *s;
	char convbuf[50];

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

	len = strlen(s) + 1;
	if (errbuf_size > 0) {
		if (errbuf_size > len)
			(void) strcpy(errbuf, s);
		else {
			(void) strncpy(errbuf, s, errbuf_size-1);
			errbuf[errbuf_size-1] = '\0';
		}
	}

	return(len);
}

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

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

	sprintf(localbuf, "%d", r->code);
	return(localbuf);
}
Commit	Line	Data
e9ce8d39 A	1	/*
	2	* Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
734aad71	6	* Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
e9ce8d39	7	*
734aad71 A	8	* This file contains Original Code and/or Modifications of Original Code
	9	* as defined in and that are subject to the Apple Public Source License
	10	* Version 2.0 (the 'License'). You may not use this file except in
	11	* compliance with the License. Please obtain a copy of the License at
	12	* http://www.opensource.apple.com/apsl/ and read it before using this
	13	* file.
	14	*
	15	* The Original Code and all software distributed under the License are
	16	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
e9ce8d39 A	17	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
e9ce8d39 A	18	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
734aad71 A	19	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	20	* Please see the License for the specific language governing rights and
	21	* limitations under the License.
e9ce8d39 A	22	*
	23	* @APPLE_LICENSE_HEADER_END@
	24	*/
	25	/*
	26	* Copyright (c) 1992, 1993, 1994
	27	* The Regents of the University of California. All rights reserved.
	28	*
	29	* This code is derived from software contributed to Berkeley by
	30	* Henry Spencer.
	31	*
	32	* Redistribution and use in source and binary forms, with or without
	33	* modification, are permitted provided that the following conditions
	34	* are met:
	35	* 1. Redistributions of source code must retain the above copyright
	36	* notice, this list of conditions and the following disclaimer.
	37	* 2. Redistributions in binary form must reproduce the above copyright
	38	* notice, this list of conditions and the following disclaimer in the
	39	* documentation and/or other materials provided with the distribution.
	40	* 3. All advertising materials mentioning features or use of this software
	41	* must display the following acknowledgement:
	42	* This product includes software developed by the University of
	43	* California, Berkeley and its contributors.
	44	* 4. Neither the name of the University nor the names of its contributors
	45	* may be used to endorse or promote products derived from this software
	46	* without specific prior written permission.
	47	*
	48	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	49	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	50	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	51	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	52	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	53	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	54	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	55	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	56	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	57	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	58	* SUCH DAMAGE.
	59	*/
	60
	61	#if defined(LIBC_SCCS) && !defined(lint)
	62	static char sccsid[] = "@(#)regerror.c 8.4 (Berkeley) 3/20/94";
	63	#endif /* LIBC_SCCS and not lint */
	64
	65	#include <sys/types.h>
	66	#include <stdio.h>
	67	#include <string.h>
	68	#include <ctype.h>
	69	#include <limits.h>
	70	#include <stdlib.h>
	71	#include <regex.h>
	72
	73	#include "utils.h"
	74
	75	/* ========= begin header generated by ./mkh ========= */
	76	#ifdef __cplusplus
	77	extern "C" {
	78	#endif
	79
	80	/* === regerror.c === */
	81	static char regatoi __P((const regex_t preg, char *localbuf));
	82
	83	#ifdef __cplusplus
	84	}
	85	#endif
86	/* ========= end header generated by ./mkh ========= */
87	/*
88	= #define REG_NOMATCH 1
89	= #define REG_BADPAT 2
90	= #define REG_ECOLLATE 3
91	= #define REG_ECTYPE 4
92	= #define REG_EESCAPE 5
93	= #define REG_ESUBREG 6
94	= #define REG_EBRACK 7
95	= #define REG_EPAREN 8
96	= #define REG_EBRACE 9
97	= #define REG_BADBR 10
98	= #define REG_ERANGE 11
99	= #define REG_ESPACE 12
100	= #define REG_BADRPT 13
101	= #define REG_EMPTY 14
102	= #define REG_ASSERT 15
103	= #define REG_INVARG 16
104	= #define REG_ATOI 255 // convert name to number (!)
105	= #define REG_ITOA 0400 // convert number to name (!)
106	*/
107	static struct rerr {
108	int code;
109	char *name;
110	char *explain;
111	} rerrs[] = {
112	REG_NOMATCH, "REG_NOMATCH", "regexec() failed to match",
113	REG_BADPAT, "REG_BADPAT", "invalid regular expression",
114	REG_ECOLLATE, "REG_ECOLLATE", "invalid collating element",
115	REG_ECTYPE, "REG_ECTYPE", "invalid character class",
116	REG_EESCAPE, "REG_EESCAPE", "trailing backslash (\\)",
117	REG_ESUBREG, "REG_ESUBREG", "invalid backreference number",
118	REG_EBRACK, "REG_EBRACK", "brackets ([ ]) not balanced",
119	REG_EPAREN, "REG_EPAREN", "parentheses not balanced",
120	REG_EBRACE, "REG_EBRACE", "braces not balanced",
121	REG_BADBR, "REG_BADBR", "invalid repetition count(s)",
122	REG_ERANGE, "REG_ERANGE", "invalid character range",
123	REG_ESPACE, "REG_ESPACE", "out of memory",
124	REG_BADRPT, "REG_BADRPT", "repetition-operator operand invalid",
125	REG_EMPTY, "REG_EMPTY", "empty (sub)expression",
126	REG_ASSERT, "REG_ASSERT", "\"can't happen\" -- you found a bug",
127	REG_INVARG, "REG_INVARG", "invalid argument to regex routine",
128	0, "", "* unknown regexp error code *",
129	};
130
131	/*
132	- regerror - the interface to error numbers
133	= extern size_t regerror(int, const regex_t , char , size_t);
134	*/
135	/* ARGSUSED */
136	size_t
137	regerror(errcode, preg, errbuf, errbuf_size)
138	int errcode;
139	const regex_t *preg;
140	char *errbuf;
141	size_t errbuf_size;
142	{
143	register struct rerr *r;
144	register size_t len;
145	register int target = errcode &~ REG_ITOA;
146	register char *s;
147	char convbuf[50];
148
149	if (errcode == REG_ATOI)
150	s = regatoi(preg, convbuf);
151	else {
152	for (r = rerrs; r->code != 0; r++)
153	if (r->code == target)
154	break;
155
156	if (errcode&REG_ITOA) {
157	if (r->code != 0)
158	(void) strcpy(convbuf, r->name);
159	else
160	sprintf(convbuf, "REG_0x%x", target);
161	assert(strlen(convbuf) < sizeof(convbuf));
162	s = convbuf;
163	} else
164	s = r->explain;
165	}
166
167	len = strlen(s) + 1;
168	if (errbuf_size > 0) {
169	if (errbuf_size > len)
170	(void) strcpy(errbuf, s);
171	else {
172	(void) strncpy(errbuf, s, errbuf_size-1);
173	errbuf[errbuf_size-1] = '\0';
174	}
175	}
176
177	return(len);
178	}
179
180	/*
181	- regatoi - internal routine to implement REG_ATOI
182	== static char regatoi(const regex_t preg, char *localbuf);
183	*/
184	static char *
185	regatoi(preg, localbuf)
186	const regex_t *preg;
187	char *localbuf;
188	{
189	register struct rerr *r;
190	register size_t siz;
191	register char *p;
192
193	for (r = rerrs; r->code != 0; r++)
194	if (strcmp(r->name, preg->re_endp) == 0)
195	break;
196	if (r->code == 0)
197	return("0");
198
199	sprintf(localbuf, "%d", r->code);
200	return(localbuf);
201	}