u-tools/apps/tar/gnu/basename-lgpl.c

   1 /* -*- buffer-read-only: t -*- vi: set ro: */
   2 /* DO NOT EDIT! GENERATED AUTOMATICALLY! */
   3 /* basename.c -- return the last element in a file name
   4
   5    Copyright (C) 1990, 1998-2001, 2003-2006, 2009-2011 Free Software
   6    Foundation, Inc.
   7
   8    This program is free software: you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21 #include <config.h>
  22
  23 #include "dirname.h"
  24
  25 #include <string.h>
  26
  27 /* Return the address of the last file name component of NAME.  If
  28    NAME has no relative file name components because it is a file
  29    system root, return the empty string.  */
  30
  31 char *
  32 last_component (char const *name)
  33 {
  34   char const *base = name + FILE_SYSTEM_PREFIX_LEN (name);
  35   char const *p;
  36   bool saw_slash = false;
  37
  38   while (ISSLASH (*base))
  39     base++;
  40
  41   for (p = base; *p; p++)
  42     {
  43       if (ISSLASH (*p))
  44         saw_slash = true;
  45       else if (saw_slash)
  46         {
  47           base = p;
  48           saw_slash = false;
  49         }
  50     }
  51
  52   return (char *) base;
  53 }
  54
  55 /* Return the length of the basename NAME.  Typically NAME is the
  56    value returned by base_name or last_component.  Act like strlen
  57    (NAME), except omit all trailing slashes.  */
  58
  59 size_t
  60 base_len (char const *name)
  61 {
  62   size_t len;
  63   size_t prefix_len = FILE_SYSTEM_PREFIX_LEN (name);
  64
  65   for (len = strlen (name);  1 < len && ISSLASH (name[len - 1]);  len--)
  66     continue;
  67
  68   if (DOUBLE_SLASH_IS_DISTINCT_ROOT && len == 1
  69       && ISSLASH (name[0]) && ISSLASH (name[1]) && ! name[2])
  70     return 2;
  71
  72   if (FILE_SYSTEM_DRIVE_PREFIX_CAN_BE_RELATIVE && prefix_len
  73       && len == prefix_len && ISSLASH (name[prefix_len]))
  74     return prefix_len + 1;
  75
  76   return len;
  77 }