| /* 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; |
| } |