Sub_BN¶
Subtracts one integer big number from another.
Syntax¶
IppStatus ippsSub_BN(IppsBigNumState* pA, IppsBigNumState* pB, IppsBigNumState* pR);
Include Files¶
ippcp.h
Parameters¶
pA |
Pointer to the first integer big number of the data type IppsBigNumState. |
pB |
Pointer to the second integer big number of the data type IppsBigNumState. |
pR |
Pointer to the subtraction result. |
Description¶
The function subtracts one integer big number from another regardless of their signs and sizes and returns the result of the operation.
The following pseudocode represents this function:
(*pR) ← (*pA) - (*pB).
Return Values¶
ippStsNoErr |
Indicates no error. Any other value indicates an error or warning. |
ippStsNullPtrErr |
Indicates an error condition if any of the specified pointers is NULL. |
ippStsOutOfRangeErr |
Indicates an error condition if IppsBigNumState *pR is smaller than the result data length. |
ippStsContextMatchErr |
Indicates an error condition if any of the context parameters does not match the operation. |
Note
The function executes only under the condition that size of IppsBigNumState *pR is not less than either the length of IppsBigNumState *pA or that of IppsBigNumState *pB.