NAME¶

SDL_murmur3_32 - Calculate a 32-bit MurmurHash3 value for a block of data.

HEADER FILE¶

Defined in SDL3/SDL_stdinc.h

SYNOPSIS¶

#include "SDL3/SDL.h"

Uint32 SDL_murmur3_32(const void *data, size_t len, Uint32 seed);

DESCRIPTION¶

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

A seed may be specified, which changes the final results consistently, but this does not work like SDL_crc16
and SDL_crc32 : you can't feed a previous result from this function back into itself as the next seed value to calculate a hash in chunks; it won't produce the same hash as it would if the same data was provided in a single call.

If you aren't sure what to provide for a seed, zero is fine. Murmur3 is not cryptographically secure, so it shouldn't be used for hashing top-secret data.

FUNCTION PARAMETERS¶

data

the data to be hashed.

len

the size of data, in bytes.

seed

a value that alters the final hash value.

RETURN VALUE¶

( Uint32 ) Returns a Murmur3 32-bit hash value.

THREAD SAFETY¶

It is safe to call this function from any thread.

AVAILABILITY¶

This function is available since SDL 3.2.0.