64 lines
1.3 KiB
C
64 lines
1.3 KiB
C
/* $NetBSD: buftvtots.c,v 1.3 1998/03/06 18:17:14 christos Exp $ */
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/*
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* buftvtots - pull a Unix-format (struct timeval) time stamp out of
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* an octet stream and convert it to a l_fp time stamp.
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* This is useful when using the clock line discipline.
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*/
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#include "ntp_fp.h"
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#include "ntp_unixtime.h"
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int
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buftvtots(bufp, ts)
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const char *bufp;
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l_fp *ts;
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{
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register const u_char *bp;
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register u_long sec;
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register u_long usec;
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#ifdef XNTP_BIG_ENDIAN
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bp = (const u_char *)bufp;
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sec = (u_long)*bp++ & 0xff;
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sec <<= 8;
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sec += (u_long)*bp++ & 0xff;
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sec <<= 8;
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sec += (u_long)*bp++ & 0xff;
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sec <<= 8;
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sec += (u_long)*bp++ & 0xff;
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usec = (u_long)*bp++ & 0xff;
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usec <<= 8;
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usec += (u_long)*bp++ & 0xff;
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usec <<= 8;
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usec += (u_long)*bp++ & 0xff;
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usec <<= 8;
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usec += (u_long)*bp & 0xff;
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#else
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bp = (u_char *)bufp + 7;
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usec = (u_long)*bp-- & 0xff;
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usec <<= 8;
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usec += (u_long)*bp-- & 0xff;
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usec <<= 8;
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usec += (u_long)*bp-- & 0xff;
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usec <<= 8;
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usec += (u_long)*bp-- & 0xff;
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sec = (u_long)*bp-- & 0xff;
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sec <<= 8;
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sec += (u_long)*bp-- & 0xff;
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sec <<= 8;
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sec += (u_long)*bp-- & 0xff;
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sec <<= 8;
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sec += (u_long)*bp & 0xff;
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#endif
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if (usec > 999999)
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return 0;
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ts->l_ui = sec + (u_long)JAN_1970;
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TVUTOTSF(usec, ts->l_uf);
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return 1;
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}
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