62 lines
2.0 KiB
C
62 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: vsprintf_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 "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
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* violation The vsprintf_s function takes a pointer to an argument list, and
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* then formats 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
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* null character, 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
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* '\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,
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va_list argList) {
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int retVal; /* If initialization causes e838 */
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if (SECUREC_VSPRINTF_PARAM_ERROR(format, strDest, destMax,
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SECUREC_STRING_MAX_LEN)) {
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SECUREC_VSPRINTF_CLEAR_DEST(strDest, destMax, SECUREC_STRING_MAX_LEN);
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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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