1 /*
2 * Copyright (c) 2021 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "securec.h"
17
18 /*******************************************************************************
19 * <FUNCTION DESCRIPTION>
20 * The fwscanf_s function is the wide-character equivalent of the fscanf_s function
21 * The fwscanf_s function reads data from the current position of stream into
22 * the locations given by argument (if any). Each argument must be a pointer
23 * to a variable of a type that corresponds to a type specifier in format.
24 * format controls the interpretation of the input fields and has the same
25 * form and function as the format argument for scanf; see scanf for a
26 * description of format.
27 *
28 * <INPUT PARAMETERS>
29 * stream Pointer to FILE structure.
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
39 * not assigned. A return value of 0 indicates that no fields were assigned.
40 * A value of -1 indicates that an error has occurred.
41 *******************************************************************************
42 */
fwscanf_s(FILE * stream,const wchar_t * format,...)43 int fwscanf_s(FILE *stream, const wchar_t *format, ...)
44 {
45 int ret; /* If initialization causes e838 */
46 va_list arglist;
47
48 va_start(arglist, format);
49 ret = vfwscanf_s(stream, 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