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 sscanf_s function is equivalent to fscanf_s,
21 * except that input is obtained from a string (specified by the argument buffer) rather than from a stream
22 * The sscanf function reads data from buffer into the location given by each
23 * argument. Every argument must be a pointer to a variable with a type that
24 * corresponds to a type specifier in format. The format argument controls the
25 * interpretation of the input fields and has the same form and function as
26 * the format argument for the scanf function.
27 * If copying takes place between strings that overlap, the behavior is undefined.
28 *
29 * <INPUT PARAMETERS>
30 * buffer Stored data.
31 * format Format control string, see Format Specifications.
32 * ... Optional arguments.
33 *
34 * <OUTPUT PARAMETERS>
35 * ... The converted value stored in user assigned address
36 *
37 * <RETURN VALUE>
38 * Each of these functions returns the number of fields successfully converted
39 * and assigned; the return value does not include fields that were read but
40 * not assigned.
41 * A return value of 0 indicates that no fields were assigned.
42 * return -1 if an error occurs.
43 *******************************************************************************
44 */
45 #ifndef __MINGW32__
sscanf_s(const char * buffer,const char * format,...)46 int sscanf_s(const char *buffer, const char *format, ...)
47 {
48 int ret; /* If initialization causes e838 */
49 va_list arglist;
50
51 va_start(arglist, format);
52 ret = vsscanf_s(buffer, format, arglist);
53 va_end(arglist);
54 (void)arglist; /* to clear e438 last value assigned not used , the compiler will optimize this code */
55
56 return ret;
57 }
58 #endif
59
60