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