wstok.c revision 1219:f89f56c2d9ac 
1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22
23/*
24 * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
25 * Use is subject to license terms.
26 */
27
28#pragma ident	"%Z%%M%	%I%	%E% SMI"
29
30/*	Copyright (c) 1986 AT&T	*/
31/*	  All Rights Reserved  	*/
32
33
34/*	This module is created for NLS on Sep.03.86		*/
35
36/*
37 * uses wcspbrk and wcsspn to break string into tokens on
38 * sequentially subsequent calls. returns WNULL when no
39 * non-separator characters remain.
40 * 'subsequent' calls are calls with first argument WNULL.
41 */
42
43#pragma weak wstok = _wstok
44
45#include "synonyms.h"
46#include "mtlib.h"
47#include "mse_int.h"
48#include <stdlib.h>
49#include <wchar.h>
50#include <thread.h>
51#include "libc.h"
52#include "tsd.h"
53
54#ifndef WNULL
55#define	WNULL	(wchar_t *)0
56#endif
57
58wchar_t *
59__wcstok_xpg5(wchar_t *string, const wchar_t *sepset, wchar_t **ptr)
60{
61	wchar_t *q, *r;
62
63	/* first or subsequent call */
64	if ((string == WNULL && (string = *ptr) == 0) ||
65	    (((q = string + wcsspn(string, sepset)) != WNULL) && *q == L'\0'))
66		return (WNULL);
67
68	/* sepset becomes next string after separator */
69	if ((r = wcspbrk(q, sepset)) == WNULL)	/* move past token */
70		*ptr = 0;	/* indicate this is last token */
71	else {
72		*r = L'\0';
73		*ptr = r + 1;
74	}
75	return (q);
76}
77
78
79wchar_t *
80wcstok(wchar_t *string, const wchar_t *sepset)
81{
82	wchar_t **lasts = tsdalloc(_T_WCSTOK, sizeof (wchar_t *), NULL);
83
84	if (lasts == NULL)
85		return (NULL);
86	return (__wcstok_xpg5(string, sepset, lasts));
87}
88
89wchar_t *
90_wstok(wchar_t *string, const wchar_t *sepset)
91{
92	return (wcstok(string, sepset));
93}
94