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 "secinput.h"
17 #if defined(SECUREC_VXWORKS_PLATFORM) && !defined(SECUREC_SYSAPI4VXWORKS)
18 #include <ctype.h>
19 #endif
20
21 /*******************************************************************************
22 * <NAME>
23 * vsscanf_s
24 *
25 *
26 * <FUNCTION DESCRIPTION>
27 * The vsscanf_s function is equivalent to sscanf_s, with the variable argument list replaced by arglist
28 * The vsscanf_s function reads data from buffer into the location given by
29 * each argument. Every argument must be a pointer to a variable with a type
30 * that corresponds to a type specifier in format. The format argument controls
31 * the interpretation of the input fields and has the same form and function
32 * as the format argument for the scanf function.
33 * If copying takes place between strings that overlap, the behavior is undefined.
34 *
35 * <INPUT PARAMETERS>
36 * buffer Stored data
37 * format Format control string, see Format Specifications.
38 * arglist pointer to list of arguments
39 *
40 * <OUTPUT PARAMETERS>
41 * arglist the converted value stored in user assigned address
42 *
43 * <RETURN VALUE>
44 * Each of these functions returns the number of fields successfully converted
45 * and assigned; the return value does not include fields that were read but
46 * not assigned. A return value of 0 indicates that no fields were assigned.
47 * return -1 if an error occurs.
48 *******************************************************************************
49 */
50 #ifndef __MINGW32__
vsscanf_s(const char * buffer,const char * format,va_list arglist)51 int vsscanf_s(const char *buffer, const char *format, va_list arglist)
52 {
53 SecFileStream fStr = SECUREC_INIT_SEC_FILE_STREAM;
54 int retVal; /* If initialization causes e838 */
55 size_t count; /* If initialization causes e838 */
56
57 /* validation section */
58 if (buffer == NULL || format == NULL) {
59 SECUREC_ERROR_INVALID_PARAMTER("vsscanf_s");
60 return SECUREC_SCANF_EINVAL;
61 }
62 count = strlen(buffer);
63 if (count == 0 || count > SECUREC_STRING_MAX_LEN) {
64 SecClearDestBuf(buffer, format, arglist);
65 SECUREC_ERROR_INVALID_PARAMTER("vsscanf_s");
66 return SECUREC_SCANF_EINVAL;
67 }
68 #ifdef SECUREC_VXWORKS_PLATFORM
69 if (isspace((int)buffer[0]) && isspace((int)buffer[count - 1])) {
70 SecClearDestBuf(buffer, format, arglist);
71 }
72 #endif
73 fStr.flag = SECUREC_MEM_STR_FLAG;
74 fStr.cur = (const char *)buffer;
75 fStr.count = (int)count;
76 retVal = SecInputS(&fStr, format, arglist);
77 if (retVal < 0) {
78 SECUREC_ERROR_INVALID_PARAMTER("vsscanf_s");
79 return SECUREC_SCANF_EINVAL;
80 }
81
82 return retVal;
83 }
84 #endif
85
86