Home Conference 2005 Order Boxed Set Product Download VU Training FAQ Press and News Docs and Papers Partner Help Team     register/help User Name: Password: Login	ODATE.CPP Go to the documentation of this file. //Filename : ODATE.CPP //Description : Date Information Object #include <stdlib.h> #include <string.h> #include <windowsx.h> #include <OSTR.H> #include <OMISC.H> #include <ODATE.H> //--------- Define static member variables -----------// #define JULIAN_ADJUSTMENT 1721425L static char month_str_array[][10] = { "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" } ; static int month_tot[]= { 0, 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 } ; // Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec // 31 28 31 30 31 30 31 31 30 31 30 31 //------------ Begin of function DateInfo::julain ----------// long DateInfo::julian( int year, int month, int day ) { long total, dayYear ; dayYear = day_year( year, month, day) ; if (dayYear < 1) return( -1) ; /* Illegal Date */ total = ytoj(year) ; total+= dayYear ; total+= JULIAN_ADJUSTMENT ; return total; } //-------------- End of function DateInfo::julian ------------// //--------- Begin of function DateInfo::julian ---------// long DateInfo::julian( char *dateStr ) { return julian( m.atoi( dateStr,4 ), m.atoi( dateStr+4,2 ), m.atoi( dateStr+6,2 ) ); } //---------- End of function DateInfo::julian ----------// //------------ Begin of function DateInfo::get_date ---------// int DateInfo::get_date( long julianDate, char returnType ) { int year, month, day, nDays, maxDays ; long totalDays ; //JULIAN_ADJUSTMENT = 1721425 if ( julianDate > 5373484 || julianDate < JULIAN_ADJUSTMENT ) return -1; totalDays = (long) (julianDate) - JULIAN_ADJUSTMENT ; year = (int) ((double)totalDays/365.2425) + 1 ; nDays = (int) (totalDays - ytoj(year)) ; if ( nDays <= 0 ) { year-- ; nDays = (int) (totalDays - ytoj(year)) ; } if (year%4 == 0 && year%100 != 0 || year%400 == 0) maxDays = 366 ; else maxDays = 365 ; if ( nDays > maxDays ) { year++ ; nDays -= maxDays ; } if ( month_day( year, nDays, month, day ) < 0 ) return -1; //............................................// switch( returnType ) { case 'Y': return year; case 'M': // return the month return month; case 'D': return day; } return 0; } //------------- End of function DateInfo::get_date --------// //------------ Begin of function DateInfo:: ---------// char* DateInfo::date_str( long julianDate, int shortMonthStr, int showDate) { int year, month, day, nDays, maxDays ; long totalDays ; static char strBuf[10]; if ( julianDate > 5373484 || julianDate < JULIAN_ADJUSTMENT ) { strBuf[0]=NULL; return strBuf; } totalDays = (long) (julianDate) - JULIAN_ADJUSTMENT ; year = (int) ((double)totalDays/365.2425) + 1 ; nDays = (int) (totalDays - ytoj(year)) ; if ( nDays <= 0 ) { year-- ; nDays = (int) (totalDays - ytoj(year)) ; } if (year%4 == 0 && year%100 != 0 || year%400 == 0) maxDays = 366 ; else maxDays = 365 ; if ( nDays > maxDays ) { year++ ; nDays -= maxDays ; } if ( month_day( year, nDays, month, day ) < 0 ) { strBuf[0]=NULL; return strBuf; } //--------------------------------------------// static String str; str = month_str_array[month-1]; if( shortMonthStr ) str = str.left(3); if( showDate ) { str += " "; str += itoa(day,strBuf,10); str += ","; } str += " Yr."; str += itoa(year,strBuf,10); return str; } //------------- End of function DateInfo::date_str --------// //------------ Begin of function DateInfo::month_str ---------// char* DateInfo::month_str(int monthNo) { return month_str_array[monthNo-1]; } //------------- End of function DateInfo::month_str --------// //---------- Begin of function DateInfo::day_year ----------// int DateInfo::day_year( int year, int month, int day ) { int isLeap, monthDays ; isLeap = ( year%4 == 0 && year%100 != 0 || year%400 == 0 ) ? 1 : 0 ; monthDays = month_tot[ month+1 ] - month_tot[ month] ; if ( month == 2 ) monthDays += isLeap ; if ( year < 0 || month < 1 || month > 12 || day < 1 || day > monthDays ) return( -1 ) ; /* Illegal Date */ if ( month <= 2 ) isLeap = 0 ; return( month_tot[month] + day + isLeap ) ; } //------------- End of function DateInfo::day_year -----------// //----------- Begin of function DateInfo::ytoj ----------// long DateInfo::ytoj( int yr ) { yr-- ; return( yr*365L + yr/4L - yr/100L + yr/400L ) ; } //--------------- End of function DateInfo::ytoj -----------// //--------- Begin of function DateInfo::month_day ---------// int DateInfo::month_day( int year, int days, int &monthRef, int &dayRef ) { int isLeap, i ; isLeap = ( year%4 == 0 && year%100 != 0 || year%400 == 0 ) ? 1 : 0 ; if ( days <= 59 ) isLeap = 0 ; for( i = 2; i <= 13; i++) { if ( days <= month_tot[i] + isLeap ) { monthRef = --i ; if ( i <= 2) isLeap = 0 ; dayRef = days - month_tot[ i] - isLeap ; return( 0) ; } } dayRef = 0 ; monthRef = 0 ; return( -1 ) ; } //----------- End of function DateInfo::month_day -----------// //--------- Begin of function DateInfo::time_str ---------// char* DateInfo::time_str(int inTime) { // #### begin Gilbert 18/8 ####// static char strBuf[6] = "00:00"; //itoa( inTime/100, strBuf, 10 ); //itoa( inTime%100, strBuf+3, 10 ); strBuf[4] = '0' + inTime % 10; strBuf[3] = '0' + (inTime/10) % 10; strBuf[1] = '0' + (inTime/100) % 10; strBuf[0] = '0' + (inTime/1000) % 10; // #### end Gilbert 18/8 ####// return strBuf; } //---------- End of function DateInfo::time_str ----------// //-------- Begin of function DateInfo::days_in_month ------// int DateInfo::days_in_month(int inMonth) { return month_tot[inMonth+1] - month_tot[inMonth]; } //---------- End of function DateInfo::days_in_month ------// //-------- Begin of function DateInfo::add_months ------// int DateInfo::add_months(int inDate, int addMonth) { int inYear = year(inDate); int inMonth = month(inDate); int inDay = day(inDate); inMonth += addMonth; if( inMonth > 12 ) { inMonth -= 12; inYear++; } if( inDay > days_in_month(inMonth) ) inDay = days_in_month(inMonth); return julian( inYear, inMonth, inDay ); } //---------- End of function DateInfo::add_months ------// //-------- Begin of function DateInfo::file_time_to_julian ------// int DateInfo::file_time_to_julian(FILETIME& fileTime) { /* WORD dosTime, dosDate; CoFileTimeToDosDateTime( &fileTime, &dosDate, &dosTime ); //--------------------------------------------// // Bits Contents // 0-4 Days of the month (1-31). // 5-8 Months (1 = January, 2 = February, and so forth). // 9-15 Year offset from 1980 (add 1980 to get actual year). //--------------------------------------------// return julian( 1980 + (dosDate>>9), (dosDate>>5) & 0x0F, dosDate & 0x0F ); */ return 0; } //---------- End of function DateInfo::file_time_to_julian ------//
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