Visible to Intel only — GUID: GUID-15861EA2-E594-40C6-A974-73B7A5921C26
Visible to Intel only — GUID: GUID-15861EA2-E594-40C6-A974-73B7A5921C26
Adler32
Computes the Adler32 checksum for the source data buffer.
Syntax
IppStatus ippsAdler32_8u (const Ipp8u* pSrc, int srcLen, Ipp32u* pAdler32);
Include Files
ippdc.h
Domain Dependencies
Headers: ippcore.h, ippvm.h, ipps.h
Libraries: ippcore.lib, ippvm.lib, ipps.lib
Parameters
pSrc |
Pointer to the source data buffer. |
srcLen |
Number of elements in the source data buffer. |
pAdler32 |
Pointer to the checksum value. |
Description
This function computes the checksum for srcLen elements of the source data buffer pSrc and stores it in the pAdler32. The checksum is computed using the Adler32 algorithm that is a modified version of the Fletcher algorithm [Flet82], [ITU224 ], [RFC1950].
You need to call the Adler32 function twice: once with a NULL/zero length buffer to prime the checksum to 1, then call it again to compute the checksum on the buffer.
You can use this function to compute the accumulated value of the checksum for multiple buffers in the data stream by specifying as an input parameter the checksum value obtained in the preceding function call.
Return Values
ippStsNoErr |
Indicates no error. |
ippStsNullPtrErr |
Indicates an error if the pSrc pointer is NULL. |
ippStsSizeErr |
Indicates an error if srcLen is less than or equal to 0. |