59 lines
2.0 KiB
C
59 lines
2.0 KiB
C
/*
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* Copyright (c) Huawei Technologies Co., Ltd. 2014-2018. All rights reserved.
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* Description: vscanf_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_STDIN 1
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#include "secinput.h"
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/*
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* <FUNCTION DESCRIPTION>
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* The vscanf_s function is equivalent to scanf_s, with the variable
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* argument list replaced by argList, The vscanf_s function reads data from the
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* standard input stream stdin and writes the data into the location that's
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* given by argument. Each argument must be a pointer to a variable of a type
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* that corresponds to a type specifier in format. If copying occurs between
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* strings that overlap, the behavior is undefined.
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*
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* <INPUT PARAMETERS>
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* format Format control string.
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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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* Returns the number of fields successfully converted and assigned;
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* the return value does not include fields that were read but not assigned.
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* A return value of 0 indicates that no fields were assigned.
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* return -1 if an error occurs.
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*/
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int vscanf_s(const char *format, va_list argList) {
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int retVal; /* If initialization causes e838 */
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SecFileStream fStr;
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SecInitFileStreamFromStdin(&fStr);
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/*
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* The "va_list" has different definition on different platform, so we can't
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* use argList == NULL To determine it's invalid. If you has fixed platform,
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* you can check some fields to validate it, such as "argList == NULL" or
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* argList.xxx != NULL or *(size_t *)&argList != 0.
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*/
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if (format == NULL || fStr.pf == NULL) {
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SECUREC_ERROR_INVALID_PARAMTER("vscanf_s");
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return SECUREC_SCANF_EINVAL;
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}
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SECUREC_LOCK_STDIN(0, fStr.pf);
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retVal = SecInputS(&fStr, format, argList);
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SECUREC_UNLOCK_STDIN(0, fStr.pf);
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if (retVal < 0) {
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SECUREC_ERROR_INVALID_PARAMTER("vscanf_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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