46 lines
1.5 KiB
C
46 lines
1.5 KiB
C
/*
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* Copyright (c) Huawei Technologies Co., Ltd. 2014-2018. All rights reserved.
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* Description: scanf_s function
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* Author: lishunda
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* Create: 2014-02-25
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*/
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#include "securec.h"
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/*
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* <FUNCTION DESCRIPTION>
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* The scanf_s function is equivalent to fscanf_s with the argument stdin interposed before the arguments to scanf_s
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* The scanf_s function reads data from the standard input stream stdin and
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* writes the data into the location that's given by argument. Each argument
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* must be a pointer to a variable of a type that corresponds to a type specifier
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* in format. If copying occurs between strings that overlap, the behavior is
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* undefined.
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*
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* <INPUT PARAMETERS>
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* format Format control string.
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* ... Optional arguments.
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*
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* <OUTPUT PARAMETERS>
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* ... 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 scanf_s(const char *format, ...)
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{
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int ret; /* If initialization causes e838 */
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va_list argList;
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va_start(argList, format);
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ret = vscanf_s(format, argList);
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va_end(argList);
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(void)argList; /* To clear e438 last value assigned not used , the compiler will optimize this code */
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return ret;
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}
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