diff options
Diffstat (limited to 'util/chtons.h')
| -rw-r--r-- | util/chtons.h | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/util/chtons.h b/util/chtons.h new file mode 100644 index 0000000..4506e33 --- /dev/null +++ b/util/chtons.h @@ -0,0 +1,32 @@ +#ifndef _CHTONS_H_ +#define _CHTONS_H_ + +#include <endian.h> + +#if __BYTE_ORDER == __BIG_ENDIAN +# define BITNR(X) ((X)^31) +# if !defined(__constant_htonl) +# define __constant_htonl(x) (x) +# endif +# if !defined(__constant_htons) +# define __constant_htons(x) (x) +# endif +#elif __BYTE_ORDER == __LITTLE_ENDIAN +# define BITNR(X) ((X)^7) +# if !defined(__constant_htonl) +# define __constant_htonl(x) \ + ((unsigned long int)((((unsigned long int)(x) & 0x000000ffU) << 24) | \ + (((unsigned long int)(x) & 0x0000ff00U) << 8) | \ + (((unsigned long int)(x) & 0x00ff0000U) >> 8) | \ + (((unsigned long int)(x) & 0xff000000U) >> 24))) +# endif +# if !defined(__constant_htons) +# define __constant_htons(x) \ + ((unsigned short int)((((unsigned short int)(x) & 0x00ff) << 8) | \ + (((unsigned short int)(x) & 0xff00) >> 8))) +# endif +#else +# error "Don't know if bytes are big- or little-endian!" +#endif + +#endif |