HashPack, HashUnpack¶
Packs/unpacks the IppsHashState or IppsHashState_rmf context into/from a user-defined buffer.
Syntax¶
IppStatus ippsHashPack (const IppsHashState* pCtx, Ipp8u* pBuffer, int bufSize);
IppStatus ippsHashPack_rmf(const IppsHashState_rmf* pCtx, Ipp8u* pBuffer, int bufferSize);
IppStatus ippsHashUnpack (const Ipp8u* pBuffer, IppsHashState* pCtx);
IppStatus ippsHashUnpack_rmf(const Ipp8u* pBuffer, IppsHashState_rmf* pCtx);
Include Files¶
ippcp.h
Parameters¶
pCtx |
Pointer to the IppsHashState or IppsHashState_rmf context. |
pBuffer |
Pointer to the user-defined buffer. |
bufSize, bufferSize |
The size of the user-defined buffer in bytes. |
Description¶
The HashPack function transforms the *pCtx context to a position-independent form and stores it in the the *pBuffer buffer. The HashUnpack function performs the inverse operation, that is, transforms the contents of the *pBuffer buffer into a normal IppsHashState or IppsHashState_rmf context. The HashPack and HashUnpack functions enable replacing the position-dependent IppsHashState or IppsHashState_rmf context in the memory.
The value of the bufSize parameter must be not less than the size of IppsHashState or IppsHashState_rmf context. Call the HashGetSize function prior to HashPack to determine the size of the buffer.
Note
This function has a reduced memory footprint version. To learn more, see Reduced Memory Footprint Functions.
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. |
ippStsMemErr |
Indicates an error condition if the value of bufSize is less than the size of the IppsHashState context. |
ippStsContextMatchErr |
Indicates an error condition in a ippsHashPack_rmf call if the context parameter does not match the operation. |
ippStsNoMem |
Indicates an error condition if the value of bufferSize is less than the size of the IppsHashState_rmf context. |