From 758f820bcc0f68aeebac1717e537ca13a320b909 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 18:11:47 +0200 Subject: Adding upstream version 9.1. Signed-off-by: Daniel Baumann --- lib/basename.c | 64 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 64 insertions(+) create mode 100644 lib/basename.c (limited to 'lib/basename.c') diff --git a/lib/basename.c b/lib/basename.c new file mode 100644 index 0000000..0e372ca --- /dev/null +++ b/lib/basename.c @@ -0,0 +1,64 @@ +/* basename.c -- return the last element in a file name + + Copyright (C) 1990, 1998-2001, 2003-2006, 2009-2022 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 . */ + +#include + +#include "dirname.h" + +#include +#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; +} -- cgit v1.2.3