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c671850a83
Import the following commits from GCC as of r16-614-g9d039eff453f77: 31dd621796f libiberty: add ldirname function f3d07779fdb libiberty: Append <libgen.h> to AC_CHECK_DECLS [PR119218]. 90183362524 libiberty, gcc: Add memrchr to libiberty and use it [PR119283]. 43717ee9064 libiberty: Fix off-by-one when collecting range expression
95 lines
2.6 KiB
C
95 lines
2.6 KiB
C
/* Libiberty dirname. Like dirname, but is not overridden by the
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system C library.
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Copyright (C) 2025 Free Software Foundation, Inc.
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This file is part of the libiberty library.
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Libiberty is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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Libiberty is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with libiberty; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
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Boston, MA 02110-1301, USA. */
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/*
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@deftypefn Replacement {char*} ldirname (const char *@var{name})
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Given a pointer to a string containing a typical pathname
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(@samp{/usr/src/cmd/ls/ls.c} for example), returns a string containing the
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passed string up to, but not including, the final directory separator.
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If the given pathname doesn't contain a directory separator then this funtion
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returns the empty string; this includes an empty given pathname. @code{NULL}
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is returned on memory allocation error.
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@end deftypefn
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "ansidecl.h"
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#include "libiberty.h"
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#include "safe-ctype.h"
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#include "filenames.h"
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/* For malloc. */
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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/* For memcpy. */
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# if HAVE_STRING_H
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# include <string.h>
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# else
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# if HAVE_STRINGS_H
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# include <strings.h>
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# endif
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# endif
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#define LDIRNAME(FPREFIX,DIRSEP) \
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char *FPREFIX##_ldirname (const char *name) \
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{ \
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/* Note that lbasename guarantees that the returned */ \
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/* pointer lies within the passed string. */ \
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const char *basename = FPREFIX##_lbasename (name); \
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size_t size = basename - name; \
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char *res = NULL; \
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\
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res = (char*) malloc (size + 1); \
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if (res != NULL) \
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{ \
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if (size > 0) \
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{ \
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if (IS_DIR_SEPARATOR_1 ((DIRSEP),name[size - 1])) \
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size -= 1; \
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memcpy (res, name, size); \
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} \
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res[size] = '\0'; \
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} \
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\
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return res; \
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}
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LDIRNAME(dos,1)
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LDIRNAME(unix,0)
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char *
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ldirname (const char *name)
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{
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#if defined (HAVE_DOS_BASED_FILE_SYSTEM)
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return dos_ldirname (name);
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#else
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return unix_ldirname (name);
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#endif
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}
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