C Standard Library Extensions
6.2.0
|
Functions | |
unsigned short | qfits_swap_bytes_16 (unsigned short w) |
Swap a 16-bit number. More... | |
unsigned int | qfits_swap_bytes_32 (unsigned int dw) |
Swap a 32-bit number. More... | |
void | qfits_swap_bytes (void *p, int s) |
Swaps bytes in a variable of given size. More... | |
This module offers access to byte-swapping routines. Generic routines are offered that should work everywhere. Assembler is also included for x86 architectures, and dedicated assembler calls for processors > 386.
void qfits_swap_bytes | ( | void * | p, |
int | s | ||
) |
Swaps bytes in a variable of given size.
p | pointer to void (generic pointer) |
s | size of the element to swap, pointed to by p |
This byte-swapper is portable and works for any even variable size. It is not truly the most efficient ever, but does its job fine everywhere this file compiles.
Referenced by qfits_query_column(), and qfits_query_column_seq().
unsigned short qfits_swap_bytes_16 | ( | unsigned short | w | ) |
Swap a 16-bit number.
w | A 16-bit (short) number to byte-swap. |
This function swaps a 16-bit number, returned the swapped value without modifying the passed argument. Assembler included for x86 architectures.
unsigned int qfits_swap_bytes_32 | ( | unsigned int | dw | ) |
Swap a 32-bit number.
dw | A 32-bit (long) number to byte-swap. |
This function swaps a 32-bit number, returned the swapped value without modifying the passed argument. Assembler included for x86 architectures and optimized for processors above 386.