1cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project/* basename.c -- return the last element in a file name 2cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project 305436638acc7c010349a69c3395f1a57c642dc62Ying Wang Copyright (C) 1990, 1998-2001, 2003-2006, 2009-2012 Free Software 405436638acc7c010349a69c3395f1a57c642dc62Ying Wang Foundation, Inc. 5cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project 605436638acc7c010349a69c3395f1a57c642dc62Ying Wang This program is free software: you can redistribute it and/or modify 7cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project it under the terms of the GNU General Public License as published by 805436638acc7c010349a69c3395f1a57c642dc62Ying Wang the Free Software Foundation; either version 3 of the License, or 905436638acc7c010349a69c3395f1a57c642dc62Ying Wang (at your option) any later version. 10cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project 11cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project This program is distributed in the hope that it will be useful, 12cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project but WITHOUT ANY WARRANTY; without even the implied warranty of 13cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project GNU General Public License for more details. 15cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project 16cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project You should have received a copy of the GNU General Public License 1705436638acc7c010349a69c3395f1a57c642dc62Ying Wang along with this program. If not, see <http://www.gnu.org/licenses/>. */ 18cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project 1905436638acc7c010349a69c3395f1a57c642dc62Ying Wang#include <config.h> 20cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project 21cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project#include "dirname.h" 22cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project 2305436638acc7c010349a69c3395f1a57c642dc62Ying Wang#include <string.h> 2405436638acc7c010349a69c3395f1a57c642dc62Ying Wang#include "xalloc.h" 2505436638acc7c010349a69c3395f1a57c642dc62Ying Wang#include "xstrndup.h" 26cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project 27cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Projectchar * 28cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Projectbase_name (char const *name) 29cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project{ 3005436638acc7c010349a69c3395f1a57c642dc62Ying Wang char const *base = last_component (name); 3105436638acc7c010349a69c3395f1a57c642dc62Ying Wang size_t length; 3205436638acc7c010349a69c3395f1a57c642dc62Ying Wang 3305436638acc7c010349a69c3395f1a57c642dc62Ying Wang /* If there is no last component, then name is a file system root or the 3405436638acc7c010349a69c3395f1a57c642dc62Ying Wang empty string. */ 3505436638acc7c010349a69c3395f1a57c642dc62Ying Wang if (! *base) 3605436638acc7c010349a69c3395f1a57c642dc62Ying Wang return xstrndup (name, base_len (name)); 3705436638acc7c010349a69c3395f1a57c642dc62Ying Wang 3805436638acc7c010349a69c3395f1a57c642dc62Ying Wang /* Collapse a sequence of trailing slashes into one. */ 3905436638acc7c010349a69c3395f1a57c642dc62Ying Wang length = base_len (base); 4005436638acc7c010349a69c3395f1a57c642dc62Ying Wang if (ISSLASH (base[length])) 4105436638acc7c010349a69c3395f1a57c642dc62Ying Wang length++; 4205436638acc7c010349a69c3395f1a57c642dc62Ying Wang 4305436638acc7c010349a69c3395f1a57c642dc62Ying Wang /* On systems with drive letters, "a/b:c" must return "./b:c" rather 4405436638acc7c010349a69c3395f1a57c642dc62Ying Wang than "b:c" to avoid confusion with a drive letter. On systems 4505436638acc7c010349a69c3395f1a57c642dc62Ying Wang with pure POSIX semantics, this is not an issue. */ 4605436638acc7c010349a69c3395f1a57c642dc62Ying Wang if (FILE_SYSTEM_PREFIX_LEN (base)) 47cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project { 4805436638acc7c010349a69c3395f1a57c642dc62Ying Wang char *p = xmalloc (length + 3); 4905436638acc7c010349a69c3395f1a57c642dc62Ying Wang p[0] = '.'; 5005436638acc7c010349a69c3395f1a57c642dc62Ying Wang p[1] = '/'; 5105436638acc7c010349a69c3395f1a57c642dc62Ying Wang memcpy (p + 2, base, length); 5205436638acc7c010349a69c3395f1a57c642dc62Ying Wang p[length + 2] = '\0'; 5305436638acc7c010349a69c3395f1a57c642dc62Ying Wang return p; 54cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project } 55cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project 5605436638acc7c010349a69c3395f1a57c642dc62Ying Wang /* Finally, copy the basename. */ 5705436638acc7c010349a69c3395f1a57c642dc62Ying Wang return xstrndup (base, length); 58cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project} 59