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 #include "libbb.h"
  10
  11 const char* FAST_FUNC bb_basename(const char *name)
  12 {
  13         const char *cp = strrchr(name, '/');
  14         if (cp)
  15                 return cp + 1;
  16         return name;
  17 }
  18
  19 /*
  20  * "/"        -> "/"
  21  * "abc"      -> "abc"
  22  * "abc/def"  -> "def"
  23  * "abc/def/" -> ""
  24  */
  25 char* FAST_FUNC bb_get_last_path_component_nostrip(const char *path)
  26 {
  27         char *slash = strrchr(path, '/');
  28
  29         if (!slash || (slash == path && !slash[1]))
  30                 return (char*)path;
  31
  32         return slash + 1;
  33 }
  34
  35 /*
  36  * "/"        -> "/"
  37  * "abc"      -> "abc"
  38  * "abc/def"  -> "def"
  39  * "abc/def/" -> "def" !!
  40  */
  41 char* FAST_FUNC bb_get_last_path_component_strip(char *path)
  42 {
  43         char *slash = last_char_is(path, '/');
  44
  45         if (slash)
  46                 while (*slash == '/' && slash != path)
  47                         *slash-- = '\0';
  48
  49         return bb_get_last_path_component_nostrip(path);
  50 }