[apple/libc.git] / gen / FreeBSD / basename.c

/*
 * Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com>
 * All rights reserved.
 *
 * 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. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED ``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 AUTHOR 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 0
#ifndef lint
static char rcsid[] = "$OpenBSD: basename.c,v 1.4 1999/05/30 17:10:30 espie Exp $";
#endif /* not lint */
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/lib/libc/gen/basename.c,v 1.7 2002/12/30 01:41:14 marcel Exp $");

#include <errno.h>
#include <libgen.h>
#include <stdlib.h>
#include <string.h>
#include <sys/param.h>

char *
basename_r(const char *path, char *bname)
{
	const char *endp, *startp;
	size_t len;

	/* Empty or NULL string gets treated as "." */
	if (path == NULL || *path == '\0') {
		bname[0] = '.';
		bname[1] = '\0';
		return (bname);
	}

	/* Strip any trailing slashes */
	endp = path + strlen(path) - 1;
	while (endp > path && *endp == '/')
		endp--;

	/* All slashes becomes "/" */
	if (endp == path && *endp == '/') {
		bname[0] = '/';
		bname[1] = '\0';
		return (bname);
	}

	/* Find the start of the base */
	startp = endp;
	while (startp > path && *(startp - 1) != '/')
		startp--;

	len = endp - startp + 1;
	if (len >= MAXPATHLEN) {
		errno = ENAMETOOLONG;
		return (NULL);
	}
	memcpy(bname, startp, len);
	bname[len] = '\0';
	return (bname);
}

#if __DARWIN_UNIX03
#define const /**/
#endif

char *
basename(const char *path)
{
	static char *bname = NULL;

	if (bname == NULL) {
		bname = (char *)malloc(MAXPATHLEN);
		if (bname == NULL)
			return (NULL);
	}
	return (basename_r(path, bname));
}
Commit	Line	Data
5b2abdfb A	1	/*
	2	* Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com>
	3	* All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
	13	* 3. The name of the author may not be used to endorse or promote products
	14	* derived from this software without specific prior written permission.
	15	*
	16	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
	17	* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
	18	* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
	19	* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
	20	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
	21	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
	22	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
	23	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
	24	* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
	25	* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	26	*/
	27
9385eb3d A	28	#if 0
9385eb3d A	29	#ifndef lint
5b2abdfb A	30	static char rcsid[] = "$OpenBSD: basename.c,v 1.4 1999/05/30 17:10:30 espie Exp $";
5b2abdfb A	31	#endif /* not lint */
9385eb3d A	32	#endif
	33	#include <sys/cdefs.h>
	34	__FBSDID("$FreeBSD: src/lib/libc/gen/basename.c,v 1.7 2002/12/30 01:41:14 marcel Exp $");
5b2abdfb A	35
	36	#include <errno.h>
	37	#include <libgen.h>
9385eb3d	38	#include <stdlib.h>
5b2abdfb A	39	#include <string.h>
5b2abdfb A	40	#include <sys/param.h>
5b2abdfb A	41
5b2abdfb A	42	char *
974e3884	43	basename_r(const char path, char bname)
5b2abdfb	44	{
9385eb3d	45	const char endp, startp;
974e3884	46	size_t len;
5b2abdfb A	47
	48	/* Empty or NULL string gets treated as "." */
	49	if (path == NULL \|\| *path == '\0') {
974e3884 A	50	bname[0] = '.';
	51	bname[1] = '\0';
	52	return (bname);
5b2abdfb A	53	}
5b2abdfb A	54
974e3884	55	/* Strip any trailing slashes */
5b2abdfb A	56	endp = path + strlen(path) - 1;
	57	while (endp > path && *endp == '/')
	58	endp--;
	59
	60	/* All slashes becomes "/" */
	61	if (endp == path && *endp == '/') {
974e3884 A	62	bname[0] = '/';
	63	bname[1] = '\0';
	64	return (bname);
5b2abdfb A	65	}
	66
	67	/* Find the start of the base */
	68	startp = endp;
	69	while (startp > path && *(startp - 1) != '/')
	70	startp--;
	71
974e3884 A	72	len = endp - startp + 1;
974e3884 A	73	if (len >= MAXPATHLEN) {
5b2abdfb	74	errno = ENAMETOOLONG;
974e3884 A	75	return (NULL);
	76	}
	77	memcpy(bname, startp, len);
	78	bname[len] = '\0';
	79	return (bname);
	80	}
	81
	82	#if __DARWIN_UNIX03
	83	#define const /**/
	84	#endif
	85
	86	char *
	87	basename(const char *path)
	88	{
	89	static char *bname = NULL;
	90
	91	if (bname == NULL) {
	92	bname = (char *)malloc(MAXPATHLEN);
	93	if (bname == NULL)
	94	return (NULL);
5b2abdfb	95	}
974e3884	96	return (basename_r(path, bname));
5b2abdfb	97	}