diff options
Diffstat (limited to 'clist_classic_sje/dbtime.c')
| -rw-r--r-- | clist_classic_sje/dbtime.c | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/clist_classic_sje/dbtime.c b/clist_classic_sje/dbtime.c new file mode 100644 index 0000000..e9189b9 --- /dev/null +++ b/clist_classic_sje/dbtime.c @@ -0,0 +1,163 @@ +/*
+
+Miranda IM: the free IM client for Microsoft* Windows*
+
+Copyright 2000-2003 Miranda ICQ/IM project,
+all portions of this codebase are copyrighted to the people
+listed in contributors.txt.
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either version 2
+of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+*/
+
+#include "commonheaders.h"
+#include "database.h"
+
+static int daysInMonth[12]={31,28,31,30,31,30,31,31,30,31,30,31};
+static int IsLeapYear(int year)
+{
+ if(year&3) return 0;
+ if(year%100) return 1;
+ if(year%400) return 0;
+ return 1;
+}
+
+static int CompareSystemTimes(SYSTEMTIME *st,SYSTEMTIME *switchDate)
+{
+ FILETIME ft1,ft2;
+
+ if(switchDate->wYear==0) { //strange day-in-month thing
+ SYSTEMTIME tempst;
+
+ //short-circuit if the months aren't the same
+ if(st->wMonth<switchDate->wMonth) return -1;
+ if(st->wMonth>switchDate->wMonth) return 1;
+
+ tempst=*switchDate;
+ tempst.wYear=st->wYear;
+ tempst.wDay=1;
+ SystemTimeToFileTime(&tempst,&ft1);
+ FileTimeToSystemTime(&ft1,&tempst); //gets the day of week of the first of the month
+ tempst.wDay=1+(7+switchDate->wDayOfWeek-tempst.wDayOfWeek)%7;
+ if(switchDate->wDay==5) { //last wDayOfWeek in month
+ if(tempst.wMonth==2) {
+ if(IsLeapYear(tempst.wYear)) daysInMonth[1]=29;
+ else daysInMonth[1]=28;
+ }
+ tempst.wDay+=7*3; //can't be less than 4 of that day in the month
+ if(tempst.wDay+7<=daysInMonth[switchDate->wMonth-1]) tempst.wDay+=7;
+ }
+ else tempst.wDay+=7*(switchDate->wDay-1); //nth of month
+ SystemTimeToFileTime(&tempst,&ft2);
+ }
+ else {
+ switchDate->wYear=st->wYear;
+ SystemTimeToFileTime(switchDate,&ft2);
+ }
+ SystemTimeToFileTime(st,&ft1);
+ return CompareFileTime(&ft1,&ft2);
+}
+
+static int TimestampToLocal(WPARAM wParam,LPARAM lParam)
+{
+ TIME_ZONE_INFORMATION tzInfo;
+ LARGE_INTEGER liFiletime;
+ FILETIME filetime;
+ SYSTEMTIME st;
+
+ GetTimeZoneInformation(&tzInfo);
+ if(tzInfo.StandardDate.wMonth==0) { //no daylight savings time
+ return (int)(wParam-tzInfo.Bias*60);
+ }
+ //this huge number is the difference between 1970 and 1601 in seconds
+ liFiletime.QuadPart=(mir_i64(11644473600)+(__int64)wParam)*10000000;
+ filetime.dwHighDateTime=liFiletime.HighPart;
+ filetime.dwLowDateTime=liFiletime.LowPart;
+ FileTimeToSystemTime(&filetime,&st);
+ if(tzInfo.DaylightDate.wMonth<tzInfo.StandardDate.wMonth) {
+ //northern hemisphere
+ if(CompareSystemTimes(&st,&tzInfo.DaylightDate)<0 ||
+ CompareSystemTimes(&st,&tzInfo.StandardDate)>0) {
+ return (int)(wParam-(tzInfo.Bias+tzInfo.StandardBias)*60);
+ }
+ return (int)(wParam-(tzInfo.Bias+tzInfo.DaylightBias)*60);
+ }
+ else {
+ //southern hemisphere
+ if(CompareSystemTimes(&st,&tzInfo.StandardDate)<0 ||
+ CompareSystemTimes(&st,&tzInfo.DaylightDate)>0) {
+ return (int)(wParam-(tzInfo.Bias+tzInfo.DaylightBias)*60);
+ }
+ return (int)(wParam-(tzInfo.Bias+tzInfo.StandardBias)*60);
+ }
+ return 0;
+}
+
+static int TimestampToString(WPARAM wParam,LPARAM lParam)
+{
+ DBTIMETOSTRING *tts=(DBTIMETOSTRING*)lParam;
+ LARGE_INTEGER liFiletime;
+ FILETIME filetime;
+ SYSTEMTIME st;
+ char dateTimeStr[64];
+ char *pDest,*pFormat;
+ int destCharsLeft,dateTimeStrLen;
+
+ //this huge number is the difference between 1970 and 1601 in seconds
+ liFiletime.QuadPart=(mir_i64(11644473600)+(__int64)(DWORD)TimestampToLocal(wParam,0))*10000000;
+ filetime.dwHighDateTime=liFiletime.HighPart;
+ filetime.dwLowDateTime=liFiletime.LowPart;
+ FileTimeToSystemTime(&filetime,&st);
+ destCharsLeft=tts->cbDest;
+ for(pFormat=tts->szFormat,pDest=tts->szDest;*pFormat;pFormat++) {
+ switch(*pFormat) {
+ case 't':
+ GetTimeFormat(LOCALE_USER_DEFAULT,TIME_NOSECONDS,&st,NULL,dateTimeStr,sizeof(dateTimeStr));
+ break;
+ case 's':
+ GetTimeFormat(LOCALE_USER_DEFAULT,0,&st,NULL,dateTimeStr,sizeof(dateTimeStr));
+ break;
+ case 'm':
+ GetTimeFormat(LOCALE_USER_DEFAULT,TIME_NOMINUTESORSECONDS,&st,NULL,dateTimeStr,sizeof(dateTimeStr));
+ break;
+ case 'd':
+ GetDateFormat(LOCALE_USER_DEFAULT,DATE_SHORTDATE,&st,NULL,dateTimeStr,sizeof(dateTimeStr));
+ break;
+ case 'D':
+ GetDateFormat(LOCALE_USER_DEFAULT,DATE_LONGDATE,&st,NULL,dateTimeStr,sizeof(dateTimeStr));
+ break;
+ default:
+ if(destCharsLeft) {
+ *pDest++=*pFormat;
+ destCharsLeft--;
+ }
+ continue;
+ }
+ dateTimeStrLen=strlen(dateTimeStr);
+ if(destCharsLeft<dateTimeStrLen) dateTimeStrLen=destCharsLeft;
+ CopyMemory(pDest,dateTimeStr,dateTimeStrLen);
+ destCharsLeft-=dateTimeStrLen;
+ pDest+=dateTimeStrLen;
+ }
+ if(destCharsLeft) *pDest=0;
+ else tts->szDest[tts->cbDest-1]=0;
+ return 0;
+}
+
+int InitTime(void)
+{
+ CreateServiceFunction(MS_DB_TIME_TIMESTAMPTOLOCAL,TimestampToLocal);
+ CreateServiceFunction(MS_DB_TIME_TIMESTAMPTOSTRING,TimestampToString);
+ return 0;
+}
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