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https://github.com/topjohnwu/ndk-busybox.git
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70 lines
1.6 KiB
C
70 lines
1.6 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* dirname implementation for busybox (for libc's missing one)
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*
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* Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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/* Note: The previous busybox implementation did not handle NULL path
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* and also moved a pointer before path, which is not portable in C.
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* So I replaced it with my uClibc version.
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*/
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#include <string.h>
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#include "libbb.h"
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#if __GNU_LIBRARY__ < 5
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extern
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char *dirname(char *path)
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{
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static const char null_or_empty_or_noslash[] = ".";
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register char *s;
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register char *last;
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char *first;
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last = s = path;
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if (s != NULL) {
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LOOP:
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while (*s && (*s != '/')) ++s;
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first = s;
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while (*s == '/') ++s;
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if (*s) {
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last = first;
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goto LOOP;
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}
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if (last == path) {
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if (*last != '/') {
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goto DOT;
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}
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if ((*++last == '/') && (last[1] == 0)) {
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++last;
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}
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}
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*last = 0;
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return path;
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}
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DOT:
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return (char *) null_or_empty_or_noslash;
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}
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#endif
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