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: sprintf_s function
12 * Author: lishunda
13 * Create: 2014-02-25
14 */
15
16 #include "securec.h"
17
18 /*
19 * <FUNCTION DESCRIPTION>
20 * The sprintf_s function is equivalent to the sprintf function
21 * except for the parameter destMax and the explicit runtime-constraints violation
22 * The sprintf_s function formats and stores a series of characters and values
23 * in strDest. Each argument (if any) is converted and output according to
24 * the corresponding format specification in format. The format consists of
25 * ordinary characters and has the same form and function as the format argument
26 * for printf. A null character is appended after the last character written.
27 * If copying occurs between strings that overlap, the behavior is undefined.
28 *
29 * <INPUT PARAMETERS>
30 * strDest Storage location for output.
31 * destMax Maximum number of characters to store.
32 * format Format-control string.
33 * ... Optional arguments
34 *
35 * <OUTPUT PARAMETERS>
36 * strDest is updated
37 *
38 * <RETURN VALUE>
39 * return the number of bytes stored in strDest, not counting the terminating null character.
40 * return -1 if an error occurred.
41 *
42 * If there is a runtime-constraint violation, strDest[0] will be set to the '\0' when strDest and destMax valid
43 */
sprintf_s(char * strDest,size_t destMax,const char * format,...)44 int sprintf_s(char *strDest, size_t destMax, const char *format, ...)
45 {
46 int ret; /* If initialization causes e838 */
47 va_list argList;
48
49 va_start(argList, format);
50 ret = vsprintf_s(strDest, destMax, format, argList);
51 va_end(argList);
52 (void)argList; /* To clear e438 last value assigned not used , the compiler will optimize this code */
53
54 return ret;
55 }
56 #if SECUREC_IN_KERNEL
57 EXPORT_SYMBOL(sprintf_s);
58 #endif
59
60