1 /*
2 * Copyright (c) Huawei Technologies Co., Ltd. 2014-2021. All rights reserved.
3 * Licensed under Mulan PSL v2.
4 * You can use this software according to the terms and conditions of the Mulan PSL v2.
5 * You may obtain a copy of Mulan PSL v2 at:
6 * http://license.coscl.org.cn/MulanPSL2
7 * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
8 * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
9 * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
10 * See the Mulan PSL v2 for more details.
11 * Description: swscanf_s function
12 * Create: 2014-02-25
13 */
14
15 #include "securec.h"
16
17 /*
18 * <FUNCTION DESCRIPTION>
19 * The swscanf_s function is the wide-character equivalent of the sscanf_s function
20 * The swscanf_s function reads data from buffer into the location given by
21 * each argument. Every argument must be a pointer to a variable with a type
22 * that corresponds to a type specifier in format. The format argument controls
23 * the interpretation of the input fields and has the same form and function
24 * as the format argument for the scanf function. If copying takes place between
25 * strings that overlap, the behavior is undefined.
26 *
27 * <INPUT PARAMETERS>
28 * buffer Stored data.
29 * format Format control string, see Format Specifications.
30 * ... Optional arguments.
31 *
32 * <OUTPUT PARAMETERS>
33 * ... the converted value stored in user assigned address
34 *
35 * <RETURN VALUE>
36 * Each of these functions returns the number of fields successfully converted
37 * and assigned; The return value does not include fields that were read but not
38 * assigned.
39 * A return value of 0 indicates that no fields were assigned.
40 * return -1 if an error occurs.
41 */
swscanf_s(const wchar_t * buffer,const wchar_t * format,...)42 int swscanf_s(const wchar_t *buffer, const wchar_t *format, ...)
43 {
44 int ret; /* If initialization causes e838 */
45 va_list argList;
46
47 va_start(argList, format);
48 ret = vswscanf_s(buffer, format, argList);
49 va_end(argList);
50 (void)argList; /* To clear e438 last value assigned not used , the compiler will optimize this code */
51
52 return ret;
53 }
54
55