libbb/get_last_path_component.c

/* vi: set sw=4 ts=4: */
/*
 * get_last_path_component implementation for busybox
 *
 * Copyright (C) 2001  Manuel Novoa III  <mjn3@opensource.lineo.com>
 *
 * 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 2 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 */

/* Set to 1 if you want basename() behavior for NULL or "". */
/* WARNING!!! Doing so will break basename applet at least! */
#define EMULATE_BASENAME	0

char *get_last_path_component(char *path)
{
#if EMULATE_BASENAME
	static const char null_or_empty[] = ".";
#endif
	char *first = path;
	char *last;

#if EMULATE_BASENAME
	if (!path || !*path) {
		return (char *) null_or_empty;
	}
#endif

	last = path - 1;

	while (*path) {
		if ((*path != '/') && (path > ++last)) {
			last = first = path;
		}
		++path;
	}

	if (*first == '/') {
		last = first;
	}
	last[1] = 0;

	return first;
}