mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-22 19:00:07 +00:00
72 lines
1.9 KiB
C
72 lines
1.9 KiB
C
/* Return basename of given pathname according to the weird XPG specification.
|
|
Copyright (C) 1997, 1999 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <string.h>
|
|
#include <libgen.h>
|
|
|
|
|
|
char *
|
|
__xpg_basename (char *filename)
|
|
{
|
|
char *p;
|
|
|
|
if (filename == NULL || filename[0] == '\0')
|
|
/* We return a pointer to a static string containing ".". */
|
|
p = (char *) ".";
|
|
else
|
|
{
|
|
p = strrchr (filename, '/');
|
|
|
|
if (p == NULL)
|
|
/* There is no slash in the filename. Return the whole string. */
|
|
p = filename;
|
|
else
|
|
{
|
|
if (p[1] == '\0')
|
|
{
|
|
/* We must remove trailing '/'. */
|
|
while (p > filename && p[-1] == '/')
|
|
--p;
|
|
|
|
/* Now we can be in two situations:
|
|
a) the string only contains '/' characters, so we return
|
|
'/'
|
|
b) p points past the last component, but we have to remove
|
|
the trailing slash. */
|
|
if (p > filename)
|
|
{
|
|
*p-- = '\0';
|
|
while (p > filename && p[-1] != '/')
|
|
--p;
|
|
}
|
|
else
|
|
/* The last slash we already found is the right position
|
|
to return. */
|
|
while (p[1] != '\0')
|
|
++p;
|
|
}
|
|
else
|
|
/* Go to the first character of the name. */
|
|
++p;
|
|
}
|
|
}
|
|
|
|
return p;
|
|
}
|