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
18 /*******************************************************************************
19 * <FUNCTION DESCRIPTION>
20 * The vfscanf_s function is equivalent to fscanf_s, with the variable argument list replaced by arglist
21 * The vfscanf_s function reads data from the current position of stream into
22 * the locations given by argument (if any). Each argument must be a pointer
23 * to a variable of a type that corresponds to a type specifier in format.
24 * format controls the interpretation of the input fields and has the same
25 * form and function as the format argument for scanf.
26 *
27 * <INPUT PARAMETERS>
28 * stream Pointer to FILE structure.
29 * format Format control string, see Format Specifications.
30 * arglist pointer to list of arguments
31 *
32 * <OUTPUT PARAMETERS>
33 * arglist the converted value stored in user assigned address
34 *
35 * <RETURN VALUE>
36 * Each of these functions returns the number of fields successfully converted
37 * and assigned; the return value does not include fields that were read but
38 * not assigned. A return value of 0 indicates that no fields were assigned.
39 * return -1 if an error occurs.
40 *******************************************************************************
41 */
vfscanf_s(FILE * stream,const char * format,va_list arglist)42 int vfscanf_s(FILE *stream, const char *format, va_list arglist)
43 {
44 int retVal; /* If initialization causes e838 */
45 SecFileStream fStr = SECUREC_INIT_SEC_FILE_STREAM;
46
47 if ((stream == NULL) || (format == NULL)) {
48 SECUREC_ERROR_INVALID_PARAMTER("vfscanf_s");
49 return SECUREC_SCANF_EINVAL;
50 }
51 if (stream == stdin) {
52 return vscanf_s(format, arglist);
53 }
54
55 SECUREC_LOCK_FILE(stream);
56 fStr.pf = stream;
57 fStr.flag = SECUREC_FILE_STREAM_FLAG;
58 fStr.oriFilePos = SECUREC_UNINITIALIZED_FILE_POS;
59
60 retVal = SecInputS(&fStr, format, arglist);
61
62 SECUREC_UNLOCK_FILE(stream);
63 if (retVal < 0) {
64 SECUREC_ERROR_INVALID_PARAMTER("vfscanf_s");
65 return SECUREC_SCANF_EINVAL;
66 }
67
68 return retVal;
69 }
70
71
72