diff options
Diffstat (limited to 'include/arpa')
| -rw-r--r-- | include/arpa/inet.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/include/arpa/inet.h b/include/arpa/inet.h index 34ff52c..a7bd2c1 100644 --- a/include/arpa/inet.h +++ b/include/arpa/inet.h @@ -157,6 +157,32 @@ uint64_t _htonll(uint64_t) #endif +/* TODO We "need" conversion to and from two's complement. + * It is important to remember than intN_t cannot be + * used for this functions because they require two's + * complement. + * + * unsigned to_twos_complement(signed v) { + * unsigned r; + * if (v >= -0) + * return (unsigned)v; + * r = (unsigned)-v; + * r = ~(r - 1); + * return r; + * } + * + * signed from_twos_complement(unsigned v) { + * signed r; + * if ((v >> (X_BIT - 1)) == 0) + * return (signed)v; + * r = ~r; + * if (r == X_MAX) + * return errno = ERANGE, 0; + * return errno = 0, r + 1; + * } + */ + + #endif |