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: fwscanf_s function
12 * Create: 2014-02-25
13 */
14
15 #include "securec.h"
16
17 /*
18 * <FUNCTION DESCRIPTION>
19 * The fwscanf_s function is the wide-character equivalent of the fscanf_s function
20 * The fwscanf_s function reads data from the current position of stream into
21 * the locations given by argument (if any). Each argument must be a pointer
22 * to a variable of a type that corresponds to a type specifier in format.
23 * format controls the interpretation of the input fields and has the same
24 * form and function as the format argument for scanf.
25 *
26 * <INPUT PARAMETERS>
27 * stream Pointer to FILE structure.
28 * format Format control string, see Format Specifications.
29 * ... Optional arguments.
30 *
31 * <OUTPUT PARAMETERS>
32 * ... The converted value stored in user assigned address
33 *
34 * <RETURN VALUE>
35 * Each of these functions returns the number of fields successfully converted
36 * and assigned; the return value does not include fields that were read but
37 * not assigned. A return value of 0 indicates that no fields were assigned.
38 * return -1 if an error occurs.
39 */
fwscanf_s(FILE * stream,const wchar_t * format,...)40 int fwscanf_s(FILE *stream, const wchar_t *format, ...)
41 {
42 int ret; /* If initialization causes e838 */
43 va_list argList;
44
45 va_start(argList, format);
46 ret = vfwscanf_s(stream, format, argList);
47 va_end(argList);
48 (void)argList; /* To clear e438 last value assigned not used , the compiler will optimize this code */
49
50 return ret;
51 }
52
53