-/* basename.c -- return the last element in a path */
+/* basename.c -- return the last element in a path
+ Copyright (C) 1990, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2, or (at your option)
+ any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software Foundation,
+ Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#if HAVE_CONFIG_H
# include <config.h>
#endif
-#ifndef FILESYSTEM_PREFIX_LEN
-# define FILESYSTEM_PREFIX_LEN(f) 0
-#endif
-
-#ifndef ISSLASH
-# define ISSLASH(c) ((c) == '/')
+#if STDC_HEADERS || HAVE_STRING_H
+# include <string.h>
#endif
+#include "dirname.h"
/* In general, we can't use the builtin `basename' function if available,
since it has different meanings in different environments.
- In some environments the builtin `basename' modifies its argument. */
+ In some environments the builtin `basename' modifies its argument.
+
+ Return the address of the last file name component of NAME. If
+ NAME has no file name components because it is all slashes, return
+ NAME if it is empty, the address of its last slash otherwise. */
char *
-base_name (name)
- char const *name;
+base_name (char const *name)
{
- char const *base = name += FILESYSTEM_PREFIX_LEN (name);
+ char const *base = name + FILESYSTEM_PREFIX_LEN (name);
+ char const *p;
- for (; *name; name++)
- if (ISSLASH (*name))
- base = name + 1;
+ for (p = base; *p; p++)
+ {
+ if (ISSLASH (*p))
+ {
+ /* Treat multiple adjacent slashes like a single slash. */
+ do p++;
+ while (ISSLASH (*p));
+
+ /* If the file name ends in slash, use the trailing slash as
+ the basename if no non-slashes have been found. */
+ if (! *p)
+ {
+ if (ISSLASH (*base))
+ base = p - 1;
+ break;
+ }
+
+ /* *P is a non-slash preceded by a slash. */
+ base = p;
+ }
+ }
return (char *) base;
}
-#ifdef STDC_HEADERS
-# include <stdlib.h>
-#else
-char *malloc ();
-#endif
+/* Return the length of of the basename NAME. Typically NAME is the
+ value returned by base_name. Act like strlen (NAME), except omit
+ redundant trailing slashes. */
-char *
-base_name_strip_trailing_slashes (name)
- char const *name;
+size_t
+base_len (char const *name)
{
- char const *end_p = name += FILESYSTEM_PREFIX_LEN (name);
- char const *first, *p;
- char *base;
- int length;
-
- /* Make END_P point to the byte after the last non-slash character
- in NAME if one exists. */
- for (p = name; *p; p++)
- if (!ISSLASH (*p))
- end_p = p + 1;
-
- if (end_p == name)
- {
- first = end_p;
- }
- else
- {
- first = end_p - 1;
- while (first > name && !ISSLASH (*(first - 1)))
- --first;
- }
-
- length = end_p - first;
- base = (char *) malloc (length + 1);
- if (base == 0)
- return 0;
-
- memcpy (base, first, length);
- base[length] = '\0';
+ size_t len;
- return base;
-}
-
-#ifdef TEST
-# include <assert.h>
-# include <stdlib.h>
-
-# define CHECK(a,b) assert (strcmp (base_name_strip_trailing_slashes(a), b) \
- == 0)
+ for (len = strlen (name); 1 < len && ISSLASH (name[len - 1]); len--)
+ continue;
-int
-main ()
-{
- CHECK ("a", "a");
- CHECK ("ab", "ab");
- CHECK ("ab/c", "c");
- CHECK ("/ab/c", "c");
- CHECK ("/ab/c/", "c");
- CHECK ("/ab/c////", "c");
- CHECK ("/", "");
- CHECK ("////", "");
- CHECK ("////a", "a");
- CHECK ("//a//", "a");
- CHECK ("/a", "a");
- exit (0);
+ return len;
}
-#endif