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/* Libiberty dirname. Like dirname, but is not overridden by the
system C library.
Copyright (C) 2025 Free Software Foundation, Inc.
This file is part of the libiberty library.
Libiberty is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
Libiberty 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with libiberty; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
Boston, MA 02110-1301, USA. */
/*
@deftypefn Replacement {char*} ldirname (const char *@var{name})
Given a pointer to a string containing a typical pathname
(@samp{/usr/src/cmd/ls/ls.c} for example), returns a string containing the
passed string up to, but not including, the final directory separator.
If the given pathname doesn't contain a directory separator then this funtion
returns the empty string; this includes an empty given pathname. @code{NULL}
is returned on memory allocation error.
@end deftypefn
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "ansidecl.h"
#include "libiberty.h"
#include "safe-ctype.h"
#include "filenames.h"
/* For malloc. */
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
/* For memcpy. */
# if HAVE_STRING_H
# include <string.h>
# else
# if HAVE_STRINGS_H
# include <strings.h>
# endif
# endif
#define LDIRNAME(FPREFIX,DIRSEP) \
char *FPREFIX##_ldirname (const char *name) \
{ \
/* Note that lbasename guarantees that the returned */ \
/* pointer lies within the passed string. */ \
const char *basename = FPREFIX##_lbasename (name); \
size_t size = basename - name; \
char *res = NULL; \
\
res = (char*) malloc (size + 1); \
if (res != NULL) \
{ \
if (size > 0) \
{ \
if (IS_DIR_SEPARATOR_1 ((DIRSEP),name[size - 1])) \
size -= 1; \
memcpy (res, name, size); \
} \
res[size] = '\0'; \
} \
\
return res; \
}
LDIRNAME(dos,1)
LDIRNAME(unix,0)
char *
ldirname (const char *name)
{
#if defined (HAVE_DOS_BASED_FILE_SYSTEM)
return dos_ldirname (name);
#else
return unix_ldirname (name);
#endif
}
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