otimezone.cpp

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00001 #include <stdio.h>
00002 #include <stdlib.h>
00003 
00004 #include <sys/types.h>
00005 
00006 #include "otimezone.h"
00007 
00008 namespace {
00009 
00010     QDateTime utcTime( time_t t) {
00011         tm* broken = ::gmtime( &t );
00012         QDateTime ret;
00013         ret.setDate( QDate( broken->tm_year + 1900, broken->tm_mon +1, broken->tm_mday ) );
00014         ret.setTime( QTime( broken->tm_hour, broken->tm_min, broken->tm_sec ) );
00015         return ret;
00016     }
00017     QDateTime utcTime( time_t t, const QString&  zone) {
00018         QCString org = ::getenv( "TZ" );
00019 #ifndef Q_OS_MACX   // Following line causes bus errors on Mac
00020         ::setenv( "TZ", zone.latin1(), true );
00021         ::tzset();
00022 
00023         tm* broken = ::localtime( &t );
00024         ::setenv( "TZ", org, true );
00025 #else
00026 #warning "Need a replacement for MacOSX!!"
00027         tm* broken = ::localtime( &t );
00028 #endif
00029 
00030         QDateTime ret;
00031         ret.setDate( QDate( broken->tm_year + 1900, broken->tm_mon +1, broken->tm_mday ) );
00032         ret.setTime( QTime( broken->tm_hour, broken->tm_min, broken->tm_sec ) );
00033 
00034         return ret;
00035     }
00036     time_t to_Time_t( const QDateTime& utc, const QString& str ) {
00037         QDate d = utc.date();
00038         QTime t = utc.time();
00039 
00040         tm broken;
00041         broken.tm_year = d.year()  - 1900;
00042         broken.tm_mon  = d.month() - 1;
00043         broken.tm_mday = d.day();
00044         broken.tm_hour = t.hour();
00045         broken.tm_min  = t.minute();
00046         broken.tm_sec = t.second();
00047 
00048         QCString org = ::getenv( "TZ" );
00049 #ifndef Q_OS_MACX   // Following line causes bus errors on Mac
00050         ::setenv( "TZ", str.latin1(), true );
00051         ::tzset();
00052 
00053         time_t ti = ::mktime( &broken );
00054         ::setenv( "TZ", org, true );
00055 #else
00056 #warning "Need a replacement for MacOSX!!"
00057         time_t ti = ::mktime( &broken );
00058 #endif
00059         return ti;
00060     }
00061 }
00062 OTimeZone::OTimeZone( const ZoneName& zone )
00063     : m_name(zone) {
00064 }
00065 OTimeZone::~OTimeZone() {
00066 }
00067 
00068 bool OTimeZone::isValid()const {
00069     return !m_name.isEmpty();
00070 }
00071 
00072 /*
00073  * we will get the current timezone
00074  * and ask it to convert to the timezone date
00075  */
00076 QDateTime OTimeZone::toLocalDateTime( const QDateTime& dt) {
00077     return OTimeZone::current().toDateTime( dt, *this );
00078 }
00079 QDateTime OTimeZone::toUTCDateTime( const QDateTime& dt ) {
00080     return OTimeZone::utc().toDateTime( dt, *this );
00081 }
00082 QDateTime OTimeZone::fromUTCDateTime( time_t t) {
00083     return utcTime( t );
00084 }
00085 QDateTime OTimeZone::toDateTime( time_t t) {
00086     return utcTime( t, m_name );
00087 }
00088 /*
00089  * convert dt to utc using zone.m_name
00090  * convert utc -> timeZoneDT using this->m_name
00091  */
00092 QDateTime OTimeZone::toDateTime( const QDateTime& dt, const OTimeZone& zone ) {
00093     time_t utc = to_Time_t( dt, zone.m_name );
00094     qWarning("%d %s", utc, zone.m_name.latin1() );
00095     return utcTime( utc, m_name );
00096 }
00097 time_t OTimeZone::fromDateTime( const QDateTime& time ) {
00098     return to_Time_t( time, m_name );
00099 }
00100 time_t OTimeZone::fromUTCDateTime( const QDateTime& time ) {
00101     return to_Time_t( time, "UTC" );
00102 }
00103 OTimeZone OTimeZone::current() {
00104     QCString str = ::getenv("TZ");
00105     OTimeZone zone( str );
00106     return zone;
00107 }
00108 OTimeZone OTimeZone::utc() {
00109     return OTimeZone("UTC");
00110 }
00111 QString OTimeZone::timeZone()const {
00112     return m_name;
00113 }
libopie PIM API Documentation

otimezone.cpp
