diff options
Diffstat (limited to 'usr.sbin/xntpd/lib/buftvtots.c')
| -rw-r--r-- | usr.sbin/xntpd/lib/buftvtots.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/usr.sbin/xntpd/lib/buftvtots.c b/usr.sbin/xntpd/lib/buftvtots.c new file mode 100644 index 0000000..d9b484d --- /dev/null +++ b/usr.sbin/xntpd/lib/buftvtots.c @@ -0,0 +1,61 @@ +/* buftvtots.c,v 3.1 1993/07/06 01:07:59 jbj Exp + * buftvtots - pull a Unix-format (struct timeval) time stamp out of + * an octet stream and convert it to a l_fp time stamp. + * This is useful when using the clock line discipline. + */ +#include "ntp_fp.h" +#include "ntp_unixtime.h" + +int +buftvtots(bufp, ts) + const char *bufp; + l_fp *ts; +{ + register const u_char *bp; + register U_LONG sec; + register U_LONG usec; + +#ifdef XNTP_BIG_ENDIAN + bp = (u_char *)bufp; + + sec = (U_LONG)*bp++ & 0xff; + sec <<= 8; + sec += (U_LONG)*bp++ & 0xff; + sec <<= 8; + sec += (U_LONG)*bp++ & 0xff; + sec <<= 8; + sec += (U_LONG)*bp++ & 0xff; + + usec = (U_LONG)*bp++ & 0xff; + usec <<= 8; + usec += (U_LONG)*bp++ & 0xff; + usec <<= 8; + usec += (U_LONG)*bp++ & 0xff; + usec <<= 8; + usec += (U_LONG)*bp & 0xff; +#else + bp = (u_char *)bufp + 7; + + usec = (U_LONG)*bp-- & 0xff; + usec <<= 8; + usec += (U_LONG)*bp-- & 0xff; + usec <<= 8; + usec += (U_LONG)*bp-- & 0xff; + usec <<= 8; + usec += (U_LONG)*bp-- & 0xff; + + sec = (U_LONG)*bp-- & 0xff; + sec <<= 8; + sec += (U_LONG)*bp-- & 0xff; + sec <<= 8; + sec += (U_LONG)*bp-- & 0xff; + sec <<= 8; + sec += (U_LONG)*bp & 0xff; +#endif + if (usec > 999999) + return 0; + + ts->l_ui = sec + (U_LONG)JAN_1970; + TVUTOTSF(usec, ts->l_uf); + return 1; +} |
