64 lines
1.8 KiB
C
64 lines
1.8 KiB
C
/* basename.c -- return the last element in a file name
|
|
|
|
Copyright (C) 1990, 1998-2001, 2003-2006, 2009-2023 Free Software
|
|
Foundation, Inc.
|
|
|
|
This program is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program 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 General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <https://www.gnu.org/licenses/>. */
|
|
|
|
#include <config.h>
|
|
|
|
#include "dirname.h"
|
|
|
|
#include <string.h>
|
|
#include "xalloc.h"
|
|
|
|
char *
|
|
base_name (char const *name)
|
|
{
|
|
char const *base = last_component (name);
|
|
idx_t length;
|
|
int dotslash_len;
|
|
if (*base)
|
|
{
|
|
length = base_len (base);
|
|
|
|
/* Collapse a sequence of trailing slashes into one. */
|
|
length += ISSLASH (base[length]);
|
|
|
|
/* On systems with drive letters, "a/b:c" must return "./b:c" rather
|
|
than "b:c" to avoid confusion with a drive letter. On systems
|
|
with pure POSIX semantics, this is not an issue. */
|
|
dotslash_len = FILE_SYSTEM_PREFIX_LEN (base) != 0 ? 2 : 0;
|
|
}
|
|
else
|
|
{
|
|
/* There is no last component, so NAME is a file system root or
|
|
the empty string. */
|
|
base = name;
|
|
length = base_len (base);
|
|
dotslash_len = 0;
|
|
}
|
|
|
|
char *p = ximalloc (dotslash_len + length + 1);
|
|
if (dotslash_len)
|
|
{
|
|
p[0] = '.';
|
|
p[1] = '/';
|
|
}
|
|
|
|
/* Finally, copy the basename. */
|
|
memcpy (p + dotslash_len, base, length);
|
|
p[dotslash_len + length] = '\0';
|
|
return p;
|
|
}
|