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: sscanf_s  function
12 * Create: 2014-02-25
13 */
14
15#include "securec.h"
16
17/*
18 * <FUNCTION DESCRIPTION>
19 *    The sscanf_s function is equivalent to fscanf_s,
20 *     except that input is obtained from a string (specified by the argument buffer) rather than from a stream
21 *    The sscanf function reads data from buffer into the location given by each
22 *    argument. Every argument must be a pointer to a variable with a type that
23 *    corresponds to a type specifier in format. The format argument controls the
24 *    interpretation of the input fields and has the same form and function as
25 *    the format argument for the scanf function.
26 *    If copying takes place between 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
39 *    not assigned.
40 *    A return value of 0 indicates that no fields were assigned.
41 *    return -1 if an error occurs.
42 */
43int sscanf_s(const char *buffer, const char *format, ...)
44{
45    int ret;                    /* If initialization causes  e838 */
46    va_list argList;
47
48    va_start(argList, format);
49    ret = vsscanf_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#if SECUREC_EXPORT_KERNEL_SYMBOL
56EXPORT_SYMBOL(sscanf_s);
57#endif
58
59