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56 lines
2.0 KiB
56 lines
2.0 KiB
/**
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* Copyright 2020 Huawei Technologies Co., Ltd
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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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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