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datetime.h

00001 //-< DATEIME.H >-----------------------------------------------------*--------*
00002 // GigaBASE                  Version 1.0         (c) 1999  GARRET    *     ?  *
00003 // (Post Relational Database Management System)                      *   /\|  *
00004 //                                                                   *  /  \  *
00005 //                          Created:     20-Nov-98    K.A. Knizhnik  * / [] \ *
00006 //                          Last update: 10-Dec-98    K.A. Knizhnik  * GARRET *
00007 //-------------------------------------------------------------------*--------*
00008 // Date-time field type
00009 //-------------------------------------------------------------------*--------*
00010 
00011 #ifndef __DATETIME_H__
00012 #define __DATETIME_H__
00013 
00014 #include "stdtp.h"
00015 #include "class.h"
00016 
00017 BEGIN_GIGABASE_NAMESPACE
00018 
00019 
00023 class GIGABASE_DLL_ENTRY dbDateTime {
00024     int4 stamp;
00025   public:
00026     bool operator == (dbDateTime const& dt) const {
00027         return stamp == dt.stamp;
00028     }
00029     bool operator != (dbDateTime const& dt) const {
00030         return stamp != dt.stamp;
00031     }
00032     bool operator > (dbDateTime const& dt) const {
00033         return stamp > dt.stamp;
00034     }
00035     bool operator >= (dbDateTime const& dt) const {
00036         return stamp >= dt.stamp;
00037     }
00038     bool operator < (dbDateTime const& dt) const {
00039         return stamp < dt.stamp;
00040     }
00041     bool operator <= (dbDateTime const& dt) const {
00042         return stamp <= dt.stamp;
00043     }
00044     int operator - (dbDateTime const& dt) const {
00045         return stamp - dt.stamp;
00046     }
00047     int operator + (dbDateTime const& dt) const {
00048         return stamp + dt.stamp;
00049     }
00050 
00054     static dbDateTime current() {
00055         return dbDateTime(time(NULL));
00056     }
00057     
00061     dbDateTime(time_t t) {
00062         stamp = (int4)t;
00063     }
00064     
00068     dbDateTime() {
00069         stamp = -1;
00070     }
00071     
00075     bool isValid() const {
00076         return stamp != -1;
00077     }
00078 
00082     time_t asTime_t() const { return stamp; }
00083 
00087     void clear() { stamp = -1; }
00088 
00098     dbDateTime(int year, int month, int day,
00099                int hour=0, int min=0, int sec = 0)
00100     {
00101         struct tm t;
00102         t.tm_year = year > 1900 ? year - 1900 : year;
00103         t.tm_mon = month-1;
00104         t.tm_mday = day;
00105         t.tm_hour = hour;
00106         t.tm_min = min;
00107         t.tm_sec = sec;
00108         t.tm_isdst = -1;
00109         stamp = (int4)mktime(&t);
00110     }
00111     
00115     dbDateTime(int hour, int min) {
00116         stamp = (hour*60+min)*60;
00117     }
00118 
00119 #if HAVE_LOCALTIME_R && !defined(NO_PTHREADS)
00120 
00123     int year() {
00124         struct tm t;
00125         return localtime_r((time_t*)&stamp, &t)->tm_year + 1900;
00126     }
00130     int month() { // 1..12
00131         struct tm t;
00132         return localtime_r((time_t*)&stamp, &t)->tm_mon + 1;
00133     }
00137     int day() { // 1..31
00138         struct tm t;
00139         return localtime_r((time_t*)&stamp, &t)->tm_mday;
00140     }
00144     int dayOfYear() { // 1..366
00145         struct tm t;
00146         return localtime_r((time_t*)&stamp, &t)->tm_yday+1;
00147     }
00151     int dayOfWeek() { // 1..7
00152         struct tm t;
00153         return localtime_r((time_t*)&stamp, &t)->tm_wday+1;
00154     }
00158     int hour() { // 0..24
00159         struct tm t;
00160         return localtime_r((time_t*)&stamp, &t)->tm_hour;
00161     }
00165     int minute() { // 0..59
00166         struct tm t;
00167         return localtime_r((time_t*)&stamp, &t)->tm_min;
00168     }
00172     int second() { // 0..59
00173         struct tm t;
00174         return localtime_r((time_t*)&stamp, &t)->tm_sec;
00175     }
00183     char_t* asString(char* buf, int buf_size, char_t const* format = "%c") const {
00184         struct tm t;
00185         strftime(buf, buf_size, format, localtime_r((const time_t*)&stamp, &t));
00186         return buf;
00187     }
00191     static dbDateTime currentDate() {
00192         struct tm t;
00193         time_t curr = time(NULL);
00194         localtime_r(&curr, &t);;
00195         t.tm_hour = 0;
00196         t.tm_min = 0;
00197         t.tm_sec = 0;
00198         return dbDateTime(mktime(&t));
00199     }
00200 #else
00201 
00204     int year() {
00205         return localtime((time_t*)&stamp)->tm_year + 1900;
00206     }
00210     int month() { // 1..12
00211         return localtime((time_t*)&stamp)->tm_mon + 1;
00212     }
00216     int day() { // 1..31
00217         return localtime((time_t*)&stamp)->tm_mday;
00218     }
00222     int dayOfYear() { // 1..366
00223         return localtime((time_t*)&stamp)->tm_yday+1;
00224     }
00228     int dayOfWeek() { // 1..7
00229         return localtime((time_t*)&stamp)->tm_wday+1;
00230     }
00234     int hour() { // 0..24
00235         return localtime((time_t*)&stamp)->tm_hour;
00236     }
00240     int minute() { // 0..59
00241         return localtime((time_t*)&stamp)->tm_min;
00242     }
00246     int second() { // 0..59
00247         return localtime((time_t*)&stamp)->tm_sec;
00248     }
00256     char_t* asString(char_t* buf, int buf_size, char_t const* format = _T("%c")) const {
00257         STRFTIME(buf, buf_size, format, localtime((time_t*)&stamp));
00258         return buf;
00259     }
00263     static dbDateTime currentDate() {
00264         time_t curr = time(NULL);
00265         struct tm* tp = localtime(&curr);;
00266         tp->tm_hour = 0;
00267         tp->tm_min = 0;
00268         tp->tm_sec = 0;
00269         return dbDateTime(mktime(tp));
00270     }
00271 #endif
00272 
00273     CLASS_DESCRIPTOR(dbDateTime,
00274                      (KEY(stamp,INDEXED|HASHED),
00275                       METHOD(year), METHOD(month), METHOD(day),
00276                       METHOD(dayOfYear), METHOD(dayOfWeek),
00277                       METHOD(hour), METHOD(minute), METHOD(second)));
00278 
00284     dbQueryExpression operator == (char_t const* field) {
00285         dbQueryExpression expr;
00286         expr = dbComponent(field,_T("stamp")),_T("="),stamp;
00287         return expr;
00288     }
00294     dbQueryExpression operator != (char_t const* field) {
00295         dbQueryExpression expr;
00296         expr = dbComponent(field,_T("stamp")),_T("<>"),stamp;
00297         return expr;
00298     }
00304     dbQueryExpression operator < (char_t const* field) {
00305         dbQueryExpression expr;
00306         expr = dbComponent(field,_T("stamp")),_T(">"),stamp;
00307         return expr;
00308     }
00314     dbQueryExpression operator <= (char_t const* field) {
00315         dbQueryExpression expr;
00316         expr = dbComponent(field,_T("stamp")),_T(">="),stamp;
00317         return expr;
00318     }
00324     dbQueryExpression operator > (char_t const* field) {
00325         dbQueryExpression expr;
00326         expr = dbComponent(field,_T("stamp")),_T("<"),stamp;
00327         return expr;
00328     }
00334     dbQueryExpression operator >= (char_t const* field) {
00335         dbQueryExpression expr;
00336         expr = dbComponent(field,_T("stamp")),_T("<="),stamp;
00337         return expr;
00338     }
00346     friend dbQueryExpression between(char_t const* field, dbDateTime& from,
00347                                      dbDateTime& till)
00348     {
00349         dbQueryExpression expr;
00350         expr=dbComponent(field,_T("stamp")),_T("between"),from.stamp,_T("and"),till.stamp;
00351         return expr;
00352     }
00353 
00358     static dbQueryExpression ascent(char_t const* field) {
00359         dbQueryExpression expr;
00360         expr=dbComponent(field,_T("stamp"));
00361         return expr;
00362     }
00367     static dbQueryExpression descent(char_t const* field) {
00368         dbQueryExpression expr;
00369         expr=dbComponent(field,_T("stamp")),_T("desc");
00370         return expr;
00371     }
00372 };
00373 
00374 END_GIGABASE_NAMESPACE
00375 
00376 #endif
00377 
00378 
00379 
00380 
00381 
00382 
00383 

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