68 lines
2.3 KiB
C
68 lines
2.3 KiB
C
/*
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* Copyright (c) Huawei Technologies Co., Ltd. 2014-2018. All rights reserved.
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* Description: vswscanf_s function
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* Author: lishunda
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* Create: 2014-02-25
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*/
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#define SECUREC_INLINE_INIT_FILE_STREAM_STR 1
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#include "secinput.h"
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SECUREC_INLINE size_t SecWcslen(const wchar_t *s) {
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const wchar_t *end = s;
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while (*end != L'\0') {
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++end;
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}
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return ((size_t)((end - s)));
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}
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/*
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* <FUNCTION DESCRIPTION>
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* The vswscanf_s function is the wide-character equivalent of the
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* vsscanf_s function The vsscanf_s function reads data from buffer into the
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* location given by each argument. Every argument must be a pointer to a
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* variable with a type that corresponds to a type specifier in format. The
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* format argument controls the interpretation of the input fields and has the
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* same form and function as the format argument for the scanf function. If
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* copying takes place between strings that overlap, the behavior is undefined.
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*
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* <INPUT PARAMETERS>
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* buffer Stored data
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* format Format control string, see Format Specifications.
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* argList pointer to list of arguments
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*
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* <OUTPUT PARAMETERS>
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* argList the converted value stored in user assigned address
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*
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* <RETURN VALUE>
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* Each of these functions returns the number of fields successfully
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* converted and assigned; the return value does not include fields that were
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* read but not assigned. A return value of 0 indicates that no fields were
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* assigned. return -1 if an error occurs.
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*/
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int vswscanf_s(const wchar_t *buffer, const wchar_t *format, va_list argList) {
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size_t count; /* If initialization causes e838 */
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SecFileStream fStr;
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int retVal;
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/* Validation section */
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if (buffer == NULL || format == NULL) {
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SECUREC_ERROR_INVALID_PARAMTER("vswscanf_s");
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return SECUREC_SCANF_EINVAL;
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}
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count = SecWcslen(buffer);
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if (count == 0 || count > SECUREC_WCHAR_STRING_MAX_LEN) {
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SecClearDestBufW(buffer, format, argList);
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SECUREC_ERROR_INVALID_PARAMTER("vswscanf_s");
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return SECUREC_SCANF_EINVAL;
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}
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SecInitFileStreamFromString(&fStr, (const char *)buffer,
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(int)count * ((int)sizeof(wchar_t)));
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retVal = SecInputSW(&fStr, format, argList);
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if (retVal < 0) {
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SECUREC_ERROR_INVALID_PARAMTER("vswscanf_s");
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return SECUREC_SCANF_EINVAL;
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}
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return retVal;
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}
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