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74 lines
2.5 KiB
74 lines
2.5 KiB
5 years ago
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/**
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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 "secureprintoutput.h"
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/*
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* <FUNCTION DESCRIPTION>
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* The vsprintf_s function is equivalent to the vsprintf function
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* except for the parameter destMax and the explicit runtime-constraints violation
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* The vsprintf_s function takes a pointer to an argument list, and then formats
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* and writes the given data to the memory pointed to by strDest.
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* The function differ from the non-secure versions only in that the secure
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* versions support positional parameters.
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*
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* <INPUT PARAMETERS>
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* strDest Storage location for the output.
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* destMax Size of strDest
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* format Format specification.
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* argList pointer to list of arguments
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*
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* <OUTPUT PARAMETERS>
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* strDest is updated
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*
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* <RETURN VALUE>
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* return the number of characters written, not including the terminating null character,
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* return -1 if an error occurs.
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*
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* If there is a runtime-constraint violation, strDest[0] will be set to the '\0' when strDest and destMax valid
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*/
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int vsprintf_s(char *strDest, size_t destMax, const char *format, va_list argList)
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{
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int retVal; /* If initialization causes e838 */
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if (format == NULL || strDest == NULL || destMax == 0 || destMax > SECUREC_STRING_MAX_LEN) {
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if (strDest != NULL && destMax > 0 && destMax <= SECUREC_STRING_MAX_LEN) {
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strDest[0] = '\0';
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}
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SECUREC_ERROR_INVALID_PARAMTER("vsprintf_s");
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return -1;
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}
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retVal = SecVsnprintfImpl(strDest, destMax, format, argList);
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if (retVal < 0) {
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strDest[0] = '\0';
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if (retVal == SECUREC_PRINTF_TRUNCATE) {
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/* Buffer is too small */
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SECUREC_ERROR_INVALID_RANGE("vsprintf_s");
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}
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SECUREC_ERROR_INVALID_PARAMTER("vsprintf_s");
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return -1;
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}
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return retVal;
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}
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#if SECUREC_IN_KERNEL
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EXPORT_SYMBOL(vsprintf_s);
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#endif
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