White space fixes from coreutils.

[gnulib.git] / lib / basename.c

diff --git a/lib/basename.c b/lib/basename.c
index 7e0c1f6..54f037e 100644 (file)
--- a/lib/basename.c
+++ b/lib/basename.c
@@ -1,5 +1,5 @@
 /* basename.c -- return the last element in a path
-   Copyright (C) 1990 Free Software Foundation, Inc.
+   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
@@ -12,27 +12,68 @@
    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., 675 Mass Ave, Cambridge, MA 02139, USA.  */
+   along with this program; if not, write to the Free Software Foundation,
+   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
 
-#ifdef HAVE_CONFIG_H
-#include <config.h>
+#if HAVE_CONFIG_H
+# include <config.h>
 #endif
 
-/* Return NAME with any leading path stripped off.
-   Don't use strrchr/rindex.  */
+#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.
+
+   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 *
-basename (name)
-     const char *name;
+base_name (char const *name)
 {
-  const char *base = name;
+  char const *base = name + FILESYSTEM_PREFIX_LEN (name);
+  char const *p;
 
-  while (*name)
+  for (p = base; *p; p++)
     {
-      if (*name == '/')
-       base = name + 1;
-      ++name;
+      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;
 }
+
+/* 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.  */
+
+size_t
+base_len (char const *name)
+{
+  size_t len;
+
+  for (len = strlen (name);  1 < len && ISSLASH (name[len - 1]);  len--)
+    continue;
+
+  return len;
+}