busybox/libbb/get_last_path_component.c

/* vi: set sw=4 ts=4: */
/*
 * bb_get_last_path_component implementation for busybox
 *
 * Copyright (C) 2001  Manuel Novoa III  <mjn3@codepoet.org>
 *
 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
 */

#include "libbb.h"
/*
 * "/"        -> "/"
 * "abc"      -> "abc"
 * "abc/def"  -> "def"
 * "abc/def/" -> ""
 */
char* FAST_FUNC bb_get_last_path_component_nostrip(const char *path)
{
	char *slash = strrchr(path, '/');

	if (!slash || (slash == path && !slash[1]))
		return (char*)path;

	return slash + 1;
}

/*
 * "/"        -> "/"
 * "abc"      -> "abc"
 * "abc/def"  -> "def"
 * "abc/def/" -> "def" !!
 */
char* FAST_FUNC bb_get_last_path_component_strip(char *path)
{
	char *slash = last_char_is(path, '/');

	if (slash)
		while (*slash == '/' && slash != path)
			*slash-- = '\0';

	return bb_get_last_path_component_nostrip(path);
}