1 /*
2 * Copyright (c) Huawei Technologies Co., Ltd. 2014-2020. 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 * Author: lishunda
13 * Create: 2014-02-25
14 */
15
16 #include "securec.h"
17
18 /*
19 * <FUNCTION DESCRIPTION>
20 * The swscanf_s function is the wide-character equivalent of the sscanf_s function
21 * The swscanf_s function reads data from buffer into the location given by
22 * each argument. Every argument must be a pointer to a variable with a type
23 * that corresponds to a type specifier in format. The format argument controls
24 * the interpretation of the input fields and has the same form and function
25 * as the format argument for the scanf function. If copying takes place between
26 * strings that overlap, the behavior is undefined.
27 *
28 * <INPUT PARAMETERS>
29 * buffer Stored data.
30 * format Format control string, see Format Specifications.
31 * ... Optional arguments.
32 *
33 * <OUTPUT PARAMETERS>
34 * ... the converted value stored in user assigned address
35 *
36 * <RETURN VALUE>
37 * Each of these functions returns the number of fields successfully converted
38 * and assigned; The return value does not include fields that were read but not
39 * assigned.
40 * A return value of 0 indicates that no fields were assigned.
41 * return -1 if an error occurs.
42 */
swscanf_s(const wchar_t * buffer,const wchar_t * format,...)43 int swscanf_s(const wchar_t *buffer, const wchar_t *format, ...)
44 {
45 int ret; /* If initialization causes e838 */
46 va_list argList;
47
48 va_start(argList, format);
49 ret = vswscanf_s(buffer, format, argList);
50 va_end(argList);
51 (void)argList; /* To clear e438 last value assigned not used , the compiler will optimize this code */
52
53 return ret;
54 }
55
56