Endian-swap a 64-bit value in place
#include <gulliver.h> void ENDIAN_SWAP64( uint64_t * num );
libc
Use the -l c option to qcc to link against this library. This library is usually included automatically.
The ENDIAN_SWAP64() macro endian-swaps the value pointed to by num in place.
Swap the endianness of a value:
#include <stdio.h> #include <stdlib.h> #include <gulliver.h> #include <inttypes.h> int main( void ) { uint64_t val = 0x1234deadbeef5678LL; ENDIAN_SWAP16( &val ); printf( "val = 0x%016x\n", val ); return EXIT_SUCCESS; }
This prints:
val = 0x7856efbeadde3412
Safety: | |
---|---|
Cancellation point | No |
Interrupt handler | Yes |
Signal handler | Yes |
Thread | Yes |
ENDIAN_SWAP64() is implemented as a macro.