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 "securecutil.h"
17
18 /*******************************************************************************
19 * <FUNCTION DESCRIPTION>
20 * The vsprintf_s function is equivalent to the vsprintf function
21 * except for the parameter destMax and the explicit runtime-constraints violation
22 * The vsprintf_s function takes a pointer to an argument list, and then formats
23 * and writes the given data to the memory pointed to by strDest.
24 * The function differ from the non-secure versions only in that the secure
25 * versions support positional parameters.
26 *
27 * <INPUT PARAMETERS>
28 * strDest Storage location for the output.
29 * destMax Size of strDest
30 * format Format specification.
31 * arglist pointer to list of arguments
32 *
33 * <OUTPUT PARAMETERS>
34 * strDest is updated
35 *
36 * <RETURN VALUE>
37 * return the number of characters written, not including the terminating null character,
38 * return -1 if an error occurs.
39 *
40 * If there is a runtime-constraint violation, strDest[0] will be set to the '\0' when strDest and destMax valid
41 *******************************************************************************
42 */
43 #ifndef __MINGW32__
vsprintf_s(char * strDest,size_t destMax,const char * format,va_list arglist)44 int vsprintf_s(char *strDest, size_t destMax, const char *format, va_list arglist)
45 {
46 int retVal; /* If initialization causes e838 */
47
48 if (format == NULL || strDest == NULL || destMax == 0 || destMax > SECUREC_STRING_MAX_LEN) {
49 if (strDest != NULL && destMax > 0) {
50 strDest[0] = '\0';
51 }
52 SECUREC_ERROR_INVALID_PARAMTER("vsprintf_s");
53 return -1;
54 }
55
56 retVal = SecVsnprintfImpl(strDest, destMax, format, arglist);
57
58 if (retVal < 0) {
59 strDest[0] = '\0';
60 if (retVal == SECUREC_PRINTF_TRUNCATE) {
61 /* Buffer is too small */
62 SECUREC_ERROR_INVALID_RANGE("vsprintf_s");
63 }
64 SECUREC_ERROR_INVALID_PARAMTER("vsprintf_s");
65 return -1;
66 }
67
68 return retVal;
69 }
70 #endif
71
72