diff options
Diffstat (limited to 'src/date.c')
| -rw-r--r-- | src/date.c | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/src/date.c b/src/date.c index 8a609ae3c..1b4f10fb4 100644 --- a/src/date.c +++ b/src/date.c @@ -222,6 +222,9 @@ static int parseHhMmSs(const char *zDate, DateTime *p){ zDate++; } ms /= rScale; + /* Truncate to avoid problems with sub-milliseconds + ** rounding. https://sqlite.org/forum/forumpost/766a2c9231 */ + if( ms>0.999 ) ms = 0.999; } }else{ s = 0; @@ -271,8 +274,8 @@ static void computeJD(DateTime *p){ Y--; M += 12; } - A = Y/100; - B = 2 - A + (A/4); + A = (Y+4800)/100; + B = 38 - A + (A/4); X1 = 36525*(Y+4716)/100; X2 = 306001*(M+1)/10000; p->iJD = (sqlite3_int64)((X1 + X2 + D + B - 1524.5 ) * 86400000); @@ -456,7 +459,7 @@ static int validJulianDay(sqlite3_int64 iJD){ ** Compute the Year, Month, and Day from the julian day number. */ static void computeYMD(DateTime *p){ - int Z, A, B, C, D, E, X1; + int Z, alpha, A, B, C, D, E, X1; if( p->validYMD ) return; if( !p->validJD ){ p->Y = 2000; @@ -467,8 +470,8 @@ static void computeYMD(DateTime *p){ return; }else{ Z = (int)((p->iJD + 43200000)/86400000); - A = (int)((Z - 1867216.25)/36524.25); - A = Z + 1 + A - (A/4); + alpha = (int)((Z + 32044.75)/36524.25) - 52; + A = Z + 1 + alpha - ((alpha+100)/4) + 25; B = A + 1524; C = (int)((B - 122.1)/365.25); D = (36525*(C&32767))/100; @@ -1354,7 +1357,7 @@ static int daysAfterMonday(DateTime *pDate){ ** In other words, return the day of the week according ** to this code: ** -** 0=Sunday, 1=Monday, 2=Tues, ..., 6=Saturday +** 0=Sunday, 1=Monday, 2=Tuesday, ..., 6=Saturday */ static int daysAfterSunday(DateTime *pDate){ assert( pDate->validJD ); @@ -1429,7 +1432,7 @@ static void strftimeFunc( } case 'f': { /* Fractional seconds. (Non-standard) */ double s = x.s; - if( s>59.999 ) s = 59.999; + if( NEVER(s>59.999) ) s = 59.999; sqlite3_str_appendf(&sRes, "%06.3f", s); break; } |