static unsigned long
convert_rawdcf(
register unsigned char *buffer,
register int size,
register clocktime_t *clock_time
)
{
if (size < 57)
{
printf("%-30s", "*** INCOMPLETE");
return CVT_NONE;
}
/*
* check Start and Parity bits
*/
if ((ext_bf(buffer, DCF_S) == 1) &&
pcheck(buffer, DCF_P_P1) &&
pcheck(buffer, DCF_P_P2) &&
pcheck(buffer, DCF_P_P3))
{
/*
* buffer OK
*/
clock_time->flags = 0;
clock_time->usecond= 0;
clock_time->second = 0;
clock_time->minute = ext_bf(buffer, DCF_M10);
clock_time->minute = TIMES10(clock_time->minute) + ext_bf(buffer, DCF_M1);
clock_time->hour = ext_bf(buffer, DCF_H10);
clock_time->hour = TIMES10(clock_time->hour) + ext_bf(buffer, DCF_H1);
clock_time->day = ext_bf(buffer, DCF_D10);
clock_time->day = TIMES10(clock_time->day) + ext_bf(buffer, DCF_D1);
clock_time->month = ext_bf(buffer, DCF_MO0);
clock_time->month = TIMES10(clock_time->month) + ext_bf(buffer, DCF_MO);
clock_time->year = ext_bf(buffer, DCF_Y10);
clock_time->year = TIMES10(clock_time->year) + ext_bf(buffer, DCF_Y1);
clock_time->wday = ext_bf(buffer, DCF_DW);
switch (ext_bf(buffer, DCF_Z))
{
case DCF_Z_MET:
clock_time->utcoffset = -60;
break;
case DCF_Z_MED:
clock_time->flags |= DCFB_DST;
clock_time->utcoffset = -120;
break;
default:
printf("%-30s", "*** BAD TIME ZONE");
return CVT_FAIL|CVT_BADFMT;
}
if (ext_bf(buffer, DCF_A1))
clock_time->flags |= DCFB_ANNOUNCE;
if (ext_bf(buffer, DCF_A2))
clock_time->flags |= DCFB_LEAP;
if (ext_bf(buffer, DCF_R))
clock_time->flags |= DCFB_ALTERNATE;
return CVT_OK;
}
else
{
/*
* bad format - not for us
*/
printf("%-30s", "*** BAD FORMAT (invalid/parity)");
return CVT_FAIL|CVT_BADFMT;
}
}
/*-----------------------------------------------------------------------
* convert a DCF77 data buffer into wall clock time + flags
*
* buffer holds a pointer to a DCF77 data buffer in symbolic
* representation
* size describes the length of DCF77 information in bits (represented
* as chars in symbolic notation
* clock points to a wall clock time description of the DCF77 data (result)
*/
static unsigned long
convert_rawdcf(
unsigned char *buffer,
int size,
clocktime_t *clock_time
)
{
if (size < 57)
{
PRINTF("%-30s", "*** INCOMPLETE");
return CVT_NONE;
}
/*
* check Start and Parity bits
*/
if ((ext_bf(buffer, DCF_S) == 1) &&
pcheck(buffer, DCF_P_P1) &&
pcheck(buffer, DCF_P_P2) &&
pcheck(buffer, DCF_P_P3))
{
/*
* buffer OK - extract all fields and build wall clock time from them
*/
clock_time->flags = 0;
clock_time->usecond= 0;
clock_time->second = 0;
clock_time->minute = ext_bf(buffer, DCF_M10);
clock_time->minute = TIMES10(clock_time->minute) + ext_bf(buffer, DCF_M1);
clock_time->hour = ext_bf(buffer, DCF_H10);
clock_time->hour = TIMES10(clock_time->hour) + ext_bf(buffer, DCF_H1);
clock_time->day = ext_bf(buffer, DCF_D10);
clock_time->day = TIMES10(clock_time->day) + ext_bf(buffer, DCF_D1);
clock_time->month = ext_bf(buffer, DCF_MO0);
clock_time->month = TIMES10(clock_time->month) + ext_bf(buffer, DCF_MO);
clock_time->year = ext_bf(buffer, DCF_Y10);
clock_time->year = TIMES10(clock_time->year) + ext_bf(buffer, DCF_Y1);
clock_time->wday = ext_bf(buffer, DCF_DW);
/*
* determine offset to UTC by examining the time zone
*/
switch (ext_bf(buffer, DCF_Z))
{
case DCF_Z_MET:
clock_time->utcoffset = -60;
break;
case DCF_Z_MED:
clock_time->flags |= DCFB_DST;
clock_time->utcoffset = -120;
break;
default:
PRINTF("%-30s", "*** BAD TIME ZONE");
return CVT_FAIL|CVT_BADFMT;
}
/*
* extract various warnings from DCF77
*/
if (ext_bf(buffer, DCF_A1))
clock_time->flags |= DCFB_ANNOUNCE;
if (ext_bf(buffer, DCF_A2))
clock_time->flags |= DCFB_LEAP;
if (ext_bf(buffer, DCF_R))
clock_time->flags |= DCFB_ALTERNATE;
return CVT_OK;
}
else
{
/*
* bad format - not for us
*/
PRINTF("%-30s", "*** BAD FORMAT (invalid/parity)");
return CVT_FAIL|CVT_BADFMT;
}
}
static u_long
convert_rawdcf(
unsigned char *buffer,
int size,
struct dcfparam *dcfprm,
clocktime_t *clock_time
)
{
unsigned char *s = buffer;
const unsigned char *b = dcfprm->onebits;
const unsigned char *c = dcfprm->zerobits;
int i;
parseprintf(DD_RAWDCF,("parse: convert_rawdcf: \"%s\"\n", buffer));
if (size < 57)
{
#ifndef PARSEKERNEL
msyslog(LOG_ERR, "parse: convert_rawdcf: INCOMPLETE DATA - time code only has %d bits", size);
#endif
return CVT_NONE;
}
for (i = 0; i < size; i++)
{
if ((*s != *b) && (*s != *c))
{
/*
* we only have two types of bytes (ones and zeros)
*/
#ifndef PARSEKERNEL
msyslog(LOG_ERR, "parse: convert_rawdcf: BAD DATA - no conversion");
#endif
return CVT_NONE;
}
if (*b) b++;
if (*c) c++;
s++;
}
/*
* check Start and Parity bits
*/
if ((ext_bf(buffer, DCF_S, dcfprm->zerobits) == 1) &&
pcheck(buffer, DCF_P_P1, dcfprm->zerobits) &&
pcheck(buffer, DCF_P_P2, dcfprm->zerobits) &&
pcheck(buffer, DCF_P_P3, dcfprm->zerobits))
{
/*
* buffer OK
*/
parseprintf(DD_RAWDCF,("parse: convert_rawdcf: parity check passed\n"));
clock_time->flags = PARSEB_S_ANTENNA|PARSEB_S_LEAP;
clock_time->utctime= 0;
clock_time->usecond= 0;
clock_time->second = 0;
clock_time->minute = ext_bf(buffer, DCF_M10, dcfprm->zerobits);
clock_time->minute = TIMES10(clock_time->minute) + ext_bf(buffer, DCF_M1, dcfprm->zerobits);
clock_time->hour = ext_bf(buffer, DCF_H10, dcfprm->zerobits);
clock_time->hour = TIMES10(clock_time->hour) + ext_bf(buffer, DCF_H1, dcfprm->zerobits);
clock_time->day = ext_bf(buffer, DCF_D10, dcfprm->zerobits);
clock_time->day = TIMES10(clock_time->day) + ext_bf(buffer, DCF_D1, dcfprm->zerobits);
clock_time->month = ext_bf(buffer, DCF_MO0, dcfprm->zerobits);
clock_time->month = TIMES10(clock_time->month) + ext_bf(buffer, DCF_MO, dcfprm->zerobits);
clock_time->year = ext_bf(buffer, DCF_Y10, dcfprm->zerobits);
clock_time->year = TIMES10(clock_time->year) + ext_bf(buffer, DCF_Y1, dcfprm->zerobits);
switch (ext_bf(buffer, DCF_Z, dcfprm->zerobits))
{
case DCF_Z_MET:
clock_time->utcoffset = -1*60*60;
break;
case DCF_Z_MED:
clock_time->flags |= PARSEB_DST;
clock_time->utcoffset = -2*60*60;
break;
default:
parseprintf(DD_RAWDCF,("parse: convert_rawdcf: BAD TIME ZONE\n"));
return CVT_FAIL|CVT_BADFMT;
}
if (ext_bf(buffer, DCF_A1, dcfprm->zerobits))
clock_time->flags |= PARSEB_ANNOUNCE;
if (ext_bf(buffer, DCF_A2, dcfprm->zerobits))
clock_time->flags |= PARSEB_LEAPADD; /* default: DCF77 data format deficiency */
if (ext_bf(buffer, DCF_R, dcfprm->zerobits))
clock_time->flags |= PARSEB_CALLBIT;
parseprintf(DD_RAWDCF,("parse: convert_rawdcf: TIME CODE OK: %d:%d, %d.%d.%d, flags 0x%lx\n",
(int)clock_time->hour, (int)clock_time->minute, (int)clock_time->day, (int)clock_time->month,(int) clock_time->year,
(u_long)clock_time->flags));
return CVT_OK;
}
else
{
/*
* bad format - not for us
*/
#ifndef PARSEKERNEL
msyslog(LOG_ERR, "parse: convert_rawdcf: parity check FAILED for \"%s\"", buffer);
#endif
return CVT_FAIL|CVT_BADFMT;
}
}
