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ExtGet_BN

Extracts the specified combination of the sign, data length, and value characteristics of the integer big number from the input structure.

Syntax

IppStatus ippsExtGet_BN(IppsBigNumSGN*
pSgn
, int*
pBitSize
, Ipp32u*
pData
, const IppsBigNumState*
pBN
);
Include Files
ippcp.h
Parameters
pSgn
Pointer to the sign of
IppsBigNumState
pBN
.
pBitSize
Pointer to the length of
pData
in bits.
pData
Pointer to the data array.
pBN
Pointer to the integer big number context
IppsBigNumState
.
Description
For the integer big number from the input structure, the function extracts the specified combination of the following characteristics: sign, data length, and value. The function is similar to the
Get_BN
function but more flexible, because any target pointer (
pSgn
,
pBitSize
, and/or
pData
) may be
NULL
, in which case the appropriate big number characteristic will not be extracted. For example,
ippsExtGet_BN(&sgn, 0,0, pBN);
extracts only the sign
ippsExtGet_BN(0, &dataLen, 0, pBN);
extracts only the data length
ippsExtGet_BN(&sgn, &dataLen, 0, pBN);
extracts the sign and data length
ippsExtGet_BN(0,0,0, pBN);
does nothing
ippsExtGet_BN(&sgn, &dataLen, pData, pBN);
does exactly what
Get_BN
does.
Return Values
ippStsNoErr
Indicates no error. Any other value indicates an error or warning.
ippStsNullPtrErr
Indicates an error condition if the pointer to the integer big number of the context is
NULL
.
ippStsContextMatchErr
Indicates an error condition if the context parameter does not match the operation.

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.