buftvtots.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* Copyright (c) 1996 by Sun Microsystems, Inc.
* All Rights Reserved.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* 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 = (const 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;
}