release/src/router/busybox/libbb/get_last_path_component.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * bb_get_last_path_component implementation for busybox
   4  *
   5  * Copyright (C) 2001  Manuel Novoa III  <mjn3@codepoet.org>
   6  *
   7  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
   8  */
   9
  10 #include "libbb.h"
  11 /*
  12  * "/"        -> "/"
  13  * "abc"      -> "abc"
  14  * "abc/def"  -> "def"
  15  * "abc/def/" -> ""
  16  */
  17 char* FAST_FUNC bb_get_last_path_component_nostrip(const char *path)
  18 {
  19         char *slash = strrchr(path, '/');
  20
  21         if (!slash || (slash == path && !slash[1]))
  22                 return (char*)path;
  23
  24         return slash + 1;
  25 }
  26
  27 /*
  28  * "/"        -> "/"
  29  * "abc"      -> "abc"
  30  * "abc/def"  -> "def"
  31  * "abc/def/" -> "def" !!
  32  */
  33 char* FAST_FUNC bb_get_last_path_component_strip(char *path)
  34 {
  35         char *slash = last_char_is(path, '/');
  36
  37         if (slash)
  38                 while (*slash == '/' && slash != path)
  39                         *slash-- = '\0';
  40
  41         return bb_get_last_path_component_nostrip(path);
  42 }