Using DLL to determine Daylight Savings Time
see GetTimeZoneInformation function placed in the kernel32.dll
if it returns TIME_ZONE_ID_DAYLIGHT (2), then time should be shifted to summer time
if it returns TIME_ZONE_ID_DAYLIGHT (2), then time should be shifted to summer time
Thanks Slawa, do you have a code example?
-charliev
local time sample in c++
TIME_ZONE_INFORMATION tzinfo={0};
int rettz=::GetTimeZoneInformation(&tzinfo);
int tmzone=0;
//---- standard or daylight both
if(rettz!=TIME_ZONE_ID_UNKNOWN) tmzone=tzinfo.Bias;
//---- if daylight then modify
if(rettz==TIME_ZONE_ID_DAYLIGHT) tmzone+=tzinfo.DaylightBias;
time_t local_time=time(NULL)-tmzone*60;
local time sample in c++
TIME_ZONE_INFORMATION tzinfo={0};
int rettz=::GetTimeZoneInformation(&tzinfo);
int tmzone=0;
//---- standard or daylight both
if(rettz!=TIME_ZONE_ID_UNKNOWN) tmzone=tzinfo.Bias;
//---- if daylight then modify
if(rettz==TIME_ZONE_ID_DAYLIGHT) tmzone+=tzinfo.DaylightBias;
time_t local_time=time(NULL)-tmzone*60;
Thank you Slawa, but I guess I need help parsing tzinfo to get DaylightBias under MT4.
-charliev
Slawa, although this was a complete solution you provided me in my "Millisecond Resolution" post... anything that could help me in this direction would be much appreciated.
Thanks,
-charliev
Thanks,
-charliev
//+------------------------------------------------------------------+
//| LocalTime.mq4 |
//| Copyright © 2006, MetaQuotes Software Corp. |
//| http://www.metaquotes.net |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2006, MetaQuotes Software Corp."
#property link "http://www.metaquotes.net"
#import "kernel32.dll"
void GetLocalTime(int& TimeArray[]);
#import
//+------------------------------------------------------------------+
//| script program start function |
//+------------------------------------------------------------------+
int start()
{
int TimeArray[4];
int nYear,nMonth,nDay,nHour,nMin,nSec,nMilliSec;
//----
GetLocalTime(TimeArray);
Print(GetLastError());
nYear=TimeArray[0]&0x0000FFFF;
nMonth=TimeArray[0]>>16;
nDay=TimeArray[1]>>16;
nHour=TimeArray[2]&0x0000FFFF;
nMin=TimeArray[2]>>16;
nSec=TimeArray[3]&0x0000FFFF;
nMilliSec=TimeArray[3]>>16;
Print(nYear,".",nMonth,".",nDay," ",nHour,":",nMin,":",nSec,":",nMilliSec);
//----
return(0);
}
//+------------------------------------------------------------------+
//+------------------------------------------------------------------+
//| LocalTime.mq4 |
//| Copyright © 2006, MetaQuotes Software Corp. |
//| http://www.metaquotes.net |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2006, MetaQuotes Software Corp."
#property link "http://www.metaquotes.net"
#import "kernel32.dll"
void GetLocalTime(int& TimeArray[]);
int GetTimeZoneInformation(int& TZInfoArray[]);
#import
//+------------------------------------------------------------------+
//| script program start function |
//+------------------------------------------------------------------+
int start()
{
int TimeArray[4];
int TZInfoArray[43];
int nYear,nMonth,nDay,nHour,nMin,nSec,nMilliSec;
string sMilliSec;
//----
GetLocalTime(TimeArray);
//---- parse date and time from array
nYear=TimeArray[0]&0x0000FFFF;
nMonth=TimeArray[0]>>16;
nDay=TimeArray[1]>>16;
nHour=TimeArray[2]&0x0000FFFF;
nMin=TimeArray[2]>>16;
nSec=TimeArray[3]&0x0000FFFF;
nMilliSec=TimeArray[3]>>16;
//---- format date and time items
sMilliSec=1000+nMilliSec;
sMilliSec=StringSubstr(sMilliSec,1);
string time_string=FormatDateTime(nYear,nMonth,nDay,nHour,nMin,nSec);
Print("Local time is: ",time_string,":",sMilliSec);
//---- shift with daylight savings
int gmt_shift=0;
int ret=GetTimeZoneInformation(TZInfoArray);
if(ret!=0) gmt_shift=TZInfoArray[0];
Print("Difference between your local time and GMT is: ",gmt_shift," minutes");
if(ret==2) gmt_shift+=TZInfoArray[42];
Print("Current difference between your local time and GMT is: ",gmt_shift," minutes");
//---- GMT
datetime local_time=StrToTime(time_string)+nSec;
Print("Greenwich mean time is: ",TimeToStr(local_time+gmt_shift*60,TIME_DATE|TIME_SECONDS));
//---- winter time (nYear remains the current)
nMonth=TZInfoArray[17]>>16;
nDay=TZInfoArray[18]>>16;
nHour=TZInfoArray[19]&0x0000FFFF;
nMin=TZInfoArray[19]>>16;
nSec=TZInfoArray[20]&0x0000FFFF;
time_string=FormatDateTime(nYear,nMonth,nDay,nHour,nMin,nSec);
Print("Standard time is: ",time_string);
//---- summer time (nYear remains the current)
nMonth=TZInfoArray[38]>>16;
nDay=TZInfoArray[39]>>16;
nHour=TZInfoArray[40]&0x0000FFFF;
nMin=TZInfoArray[40]>>16;
nSec=TZInfoArray[41]&0x0000FFFF;
time_string=FormatDateTime(nYear,nMonth,nDay,nHour,nMin,nSec);
Print("Daylight savings time is: ",time_string);
//----
return(0);
}
//+------------------------------------------------------------------+
//| |
//+------------------------------------------------------------------+
string FormatDateTime(int nYear,int nMonth,int nDay,int nHour,int nMin,int nSec)
{
string sMonth,sDay,sHour,sMin,sSec;
//----
sMonth=100+nMonth;
sMonth=StringSubstr(sMonth,1);
sDay=100+nDay;
sDay=StringSubstr(sDay,1);
sHour=100+nHour;
sHour=StringSubstr(sHour,1);
sMin=100+nMin;
sMin=StringSubstr(sMin,1);
sSec=100+nSec;
sSec=StringSubstr(sSec,1);
//----
return(StringConcatenate(nYear,".",sMonth,".",sDay," ",sHour,":",sMin,":",sSec));
}
//+------------------------------------------------------------------+
Slawa, WOW! Excellent... THANKS!
-charliev
-charliev
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Does anyone have a code example to determine daylight savings time?
Thank you,
-charliev