mirror of https://gitee.com/openkylin/wget.git
76 lines
2.0 KiB
C
76 lines
2.0 KiB
C
|
/* basename.c -- return the last element in a file name
|
||
|
|
|
||
|
|
Copyright (C) 1990, 1998-2001, 2003-2006, 2009-2019 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>
|
||
|
|
|
||
|
|
/* Return the address of the last file name component of NAME. If
|
||
|
|
NAME has no relative file name components because it is a file
|
||
|
|
system root, return the empty string. */
|
||
|
|
|
||
|
|
char *
|
||
|
|
last_component (char const *name)
|
||
|
|
{
|
||
|
|
char const *base = name + FILE_SYSTEM_PREFIX_LEN (name);
|
||
|
|
char const *p;
|
||
|
|
bool saw_slash = false;
|
||
|
|
|
||
|
|
while (ISSLASH (*base))
|
||
|
|
base++;
|
||
|
|
|
||
|
|
for (p = base; *p; p++)
|
||
|
|
{
|
||
|
|
if (ISSLASH (*p))
|
||
|
|
saw_slash = true;
|
||
|
|
else if (saw_slash)
|
||
|
|
{
|
||
|
|
base = p;
|
||
|
|
saw_slash = false;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return (char *) base;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Return the length of the basename NAME. Typically NAME is the
|
||
|
|
value returned by base_name or last_component. Act like strlen
|
||
|
|
(NAME), except omit all trailing slashes. */
|
||
|
|
|
||
|
|
size_t
|
||
|
|
base_len (char const *name)
|
||
|
|
{
|
||
|
|
size_t len;
|
||
|
|
size_t prefix_len = FILE_SYSTEM_PREFIX_LEN (name);
|
||
|
|
|
||
|
|
for (len = strlen (name); 1 < len && ISSLASH (name[len - 1]); len--)
|
||
|
|
continue;
|
||
|
|
|
||
|
|
if (DOUBLE_SLASH_IS_DISTINCT_ROOT && len == 1
|
||
|
|
&& ISSLASH (name[0]) && ISSLASH (name[1]) && ! name[2])
|
||
|
|
return 2;
|
||
|
|
|
||
|
|
if (FILE_SYSTEM_DRIVE_PREFIX_CAN_BE_RELATIVE && prefix_len
|
||
|
|
&& len == prefix_len && ISSLASH (name[prefix_len]))
|
||
|
|
return prefix_len + 1;
|
||
|
|
|
||
|
|
return len;
|
||
|
|
}
|