FastCRC Library

C++ Interface

CFastCRC32

CFastCRC32 class does not have a base class.

CFastCRC32 class assists you in generating CRC32 checksums.

CRC32 checksums can be generated in two modes: accumulative and non-accumulative.

The accumulative mode is applied when the data for which the checksum is calculated (data) represents one or more continuous memory block(s) or when the data is created at runtime in many steps (for instance, when reading a file).

Non-accumulative mode can be applied when the data represents one continuous memory block, a null-terminated string, or a file.

To generate the checksum in the accumulative mode, perform the following:

• Instantiate a CFastCRC32 object.

• Call the Update member function for each continuous memory block of data to perform the calculations.

• Call the Final member function to obtain the checksum.

To generate the checksum in the non-accumulative mode, perform the following:

• Call the Calculate static member function to calculate and retrieve the checksum.

Class Members   |   Useful Links   |   HashCalc

Samples   CRC32 checksum generation for a file

               CRC32 checksum generation for a string