Provided by: libsdl3-doc_3.2.20+ds-2_all 

NAME
SDL_Swap64 - Byte-swap an unsigned 64-bit number.
SYNOPSIS
#include <SDL3/SDL_endian.h>
SDL_FORCE_INLINE Uint64 SDL_Swap64(Uint64 x);
DESCRIPTION
This will always byte-swap the value, whether it's currently in the native byteorder of the system or
not. You should use SDL_Swap64LE or SDL_Swap64BE instead, in most cases.
Note that this is a forced-inline function in a header, and not a public API function available in the
SDL library (which is to say, the code is embedded in the calling program and the linker and dynamic
loader will not be able to find this function inside SDL itself).
FUNCTION PARAMETERS
x the value to byte-swap.
RETURN VALUE
Returns x, with its bytes in the opposite endian order.
THREAD SAFETY
It is safe to call this function from any thread.
AVAILABILITY
This function is available since SDL 3.2.0.
Simple Directmedia Layer SDL 3.2.20 SDL_Swap64(3)