(This is the documentation for SDL3, which is the current stable version. SDL2 was the previous version!)

SDL_crc16

Calculate a CRC-16 value.

Header File

Defined in <SDL3/SDL_stdinc.h>

Syntax

Uint16 SDL_crc16(Uint16 crc, const void *data, size_t len);

Function Parameters

Uint16	crc	the current checksum for this data set, or 0 for a new data set.
const void *	data	a new block of data to add to the checksum.
size_t	len	the size, in bytes, of the new block of data.

Return Value

(Uint16) Returns a CRC-16 checksum value of all blocks in the data set.

Remarks

https://en.wikipedia.org/wiki/Cyclic_redundancy_check

This function can be called multiple times, to stream data to be checksummed in blocks. Each call must provide the previous CRC-16 return value to be updated with the next block. The first call to this function for a set of blocks should pass in a zero CRC value.

Thread Safety

It is safe to call this function from any thread.

Version

This function is available since SDL 3.1.3.

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CategoryAPI, CategoryAPIFunction, CategoryStdinc

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