updated and simplified basename function from FreeBSD.
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Kelvin Sherlock
parent
a6e0b2d0c3
commit
1bd5fc519f
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@ -31,8 +31,8 @@
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#ifndef _LIBGEN_H_
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#define _LIBGEN_H_
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char *basename(const char *);
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char *basename(char *);
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char *basename_r(const char *, char *);
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char *dirname(const char *);
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char *dirname(char *);
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#endif /* !_LIBGEN_H_ */
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113
libc/basename.c
113
libc/basename.c
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@ -1,85 +1,54 @@
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/* $OpenBSD: basename.c,v 1.14 2005/08/08 08:05:33 espie Exp $ */
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/*
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* Copyright (c) 1997, 2004 Todd C. Miller <Todd.Miller@courtesan.com>
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/*-
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* Copyright (c) 2015-2016 Nuxi, https://nuxi.nl/
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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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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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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#include <errno.h>
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#include <libgen.h>
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#include <stdlib.h>
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#include <string.h>
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//#include <sys/param.h>
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#define MAXPATHLEN 1024
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#ifndef ENAMETOOLONG
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#define ENAMETOOLONG EINVAL
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#endif
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static int is_sep(char c) {
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return c == '/' || c == ':';
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}
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#define __DECONST(a,b) (a)(b)
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char *
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basename_r(const char *path, char *bname)
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(basename)(char *path)
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{
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const char *endp, *startp;
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size_t len;
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char *ptr;
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/* Empty or NULL string gets treated as "." */
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if (path == NULL || *path == '\0') {
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bname[0] = '.';
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bname[1] = '\0';
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return (bname);
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}
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/*
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* If path is a null pointer or points to an empty string,
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* basename() shall return a pointer to the string ".".
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*/
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if (path == NULL || *path == '\0')
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return (__DECONST(char *, "."));
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/* Strip any trailing slashes */
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endp = path + strlen(path) - 1;
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while (endp > path && is_sep(*endp))
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endp--;
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/* Find end of last pathname component and null terminate it. */
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ptr = path + strlen(path);
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while (ptr > path + 1 && *(ptr - 1) == '/')
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--ptr;
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*ptr-- = '\0';
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/* All slashes becomes "/" */
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if (endp == path && is_sep(*endp)) {
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bname[0] = '/';
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bname[1] = '\0';
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return (bname);
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}
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/* Find the start of the base */
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startp = endp;
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while (startp > path && !is_sep(*(startp - 1)))
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startp--;
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len = endp - startp + 1;
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if (len >= MAXPATHLEN) {
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errno = ENAMETOOLONG;
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return (NULL);
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}
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memcpy(bname, startp, len);
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bname[len] = '\0';
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return (bname);
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}
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char *
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basename(const char *path)
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{
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static char *bname = NULL;
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if (bname == NULL) {
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bname = (char *)malloc(MAXPATHLEN);
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if (bname == NULL)
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return (NULL);
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}
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return (basename_r(path, bname));
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}
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/* Find beginning of last pathname component. */
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while (ptr > path && *(ptr - 1) != '/')
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--ptr;
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return (ptr);
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}
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