amended sleeptracker structure

Thanks to Lee, the inventor of sleeptracker for disclosing missing piece of
information.

Signed-off-by: Michael Krelin <hacker@klever.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/st-decode.cc b/lib/st-decode.cc
index f8459ac..0fb41de 100644
--- a/lib/st-decode.cc
+++ b/lib/st-decode.cc
@@ -1,75 +1,75 @@
 #include <stdexcept>
 #include <numeric>
 #include <napkin/exception.h>
 #include <napkin/st/decode.h>
 
 namespace napkin {
     namespace sleeptracker {
         using std::invalid_argument;
         using std::runtime_error;
 
         struct st_time_t {
             uint8_t hour;
             uint8_t min;
         };
         struct st_date_t {
             uint8_t month;
             uint8_t day;
+            uint8_t dow;
         };
         struct st_fulltime_t {
             uint8_t hour;
             uint8_t min;
             uint8_t sec;
         };
         struct st_data_header_t {
             char magic;
             st_date_t today;
-            uint8_t unknown;
             uint8_t window;
             st_time_t to_bed;
             st_time_t alarm;
             uint8_t nawakes;
         };
         struct st_data_footer_t {
             uint16_t data_a;
             uint8_t checksum;
             uint8_t eof_mark;
         };
 
         static void back_a_day(struct tm& t) {
             time_t ts = mktime(&t);
             if(ts==(time_t)-1)
                 throw exception_st_data("failed to make up time to step back a day");
             ts -= 60*60*24;
             if(!localtime_r(&ts,&t))
                 throw exception_st_data("failed to localtime_r() while stepping back a day");
         }
 
         hypnodata_t& decode(hypnodata_t& rv,const void *data,size_t data_length) {
             if(data_length < (sizeof(st_data_header_t)+sizeof(st_data_footer_t)))
                 throw exception_st_data_envelope("not enough sleeptracker data to decode");
             st_data_header_t *h = (st_data_header_t*)data;
             if(h->magic != 'V')
                 throw exception_st_data_envelope("invalid magic in the data");
             st_data_footer_t *f = (st_data_footer_t*)(static_cast<const char *>(data)+data_length-sizeof(st_data_footer_t));
             if( (std::accumulate((uint8_t*)&h->today,(uint8_t*)&f->checksum,0)&0xFF) != f->checksum )
                 throw exception_st_data_integrity("checksum mismatch");
             st_fulltime_t *aawake = (st_fulltime_t*)&h[1];
             if((void*)&aawake[h->nawakes] != (void*)f)
                 throw exception_st_data_envelope("unbelievably screwed up data");
             rv.clear();
             time_t now = time(0);
             struct tm t;
             if(!localtime_r(&now,&t))
                 throw exception_st_data("failed to localtime_r()");
             t.tm_mon = h->today.month-1;
             t.tm_mday = h->today.day;
             time_t mkt = mktime(&t);
             if(mkt == (time_t)-1)
                 throw exception_st_data("failed to mktime() for a timestamp");
             if(mkt > now) {
                 --t.tm_year;
             }
             struct tm ta;
             memmove(&ta,&t,sizeof(ta));
             ta.tm_sec = 0;