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/*
Miranda IM: the free IM client for Microsoft* Windows*
Copyright 2010 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.
implements services to handle location - based timezones, instead of
simple UTC offsets.
*/
#include "commonheaders.h"
#include <m_timezones.h>
typedef DWORD (WINAPI *pfnGetDynamicTimeZoneInformation_t)(DYNAMIC_TIME_ZONE_INFORMATION *pdtzi);
static pfnGetDynamicTimeZoneInformation_t pfnGetDynamicTimeZoneInformation;
typedef HRESULT (WINAPI *pfnSHLoadIndirectString_t)(LPCWSTR pszSource, LPWSTR pszOutBuf, UINT cchOutBuf, void **ppvReserved);
static pfnSHLoadIndirectString_t pfnSHLoadIndirectString;
typedef LANGID (WINAPI *pfnGetUserDefaultUILanguage_t)(void);
static pfnGetUserDefaultUILanguage_t pfnGetUserDefaultUILanguage;
typedef LANGID (WINAPI *pfnGetSystemDefaultUILanguage_t)(void);
static pfnGetSystemDefaultUILanguage_t pfnGetSystemDefaultUILanguage;
typedef LPARAM (WINAPI *pfnSendMessageW_t)(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam);
static pfnSendMessageW_t pfnSendMessageW;
typedef struct _REG_TZI_FORMAT
{
LONG Bias;
LONG StandardBias;
LONG DaylightBias;
SYSTEMTIME StandardDate;
SYSTEMTIME DaylightDate;
} REG_TZI_FORMAT;
#define MIM_TZ_DISPLAYLEN 128
struct MIM_TIMEZONE
{
unsigned hash;
int offset;
TCHAR tszName[MIM_TZ_NAMELEN]; // windows name for the time zone
wchar_t szDisplay[MIM_TZ_DISPLAYLEN]; // more descriptive display name (that's what usually appears in dialogs)
// every hour should be sufficient.
TIME_ZONE_INFORMATION tzi;
static int compareBias(const MIM_TIMEZONE* p1, const MIM_TIMEZONE* p2)
{ return p2->tzi.Bias - p1->tzi.Bias; }
};
typedef struct
{
DWORD timestamp; // last time updated
MIM_TIMEZONE myTZ; // set to my own timezone
} TZ_INT_INFO;
static TZ_INT_INFO myInfo;
bool muiInstalled;
static OBJLIST<MIM_TIMEZONE> g_timezones(55, NumericKeySortT);
static LIST<MIM_TIMEZONE> g_timezonesBias(55, MIM_TIMEZONE::compareBias);
void FormatTime (const SYSTEMTIME *st, const TCHAR *szFormat, TCHAR *szDest, int cbDest);
void UnixTimeToFileTime(time_t ts, LPFILETIME pft);
time_t FileTimeToUnixTime(LPFILETIME pft);
#define fnSystemTimeToTzSpecificLocalTime SystemTimeToTzSpecificLocalTime
void GetLocalizedString(HKEY hSubKey, const TCHAR *szName, wchar_t *szBuf, DWORD cbLen)
{
szBuf[0] = 0;
if (muiInstalled)
{
TCHAR tszTempBuf[MIM_TZ_NAMELEN], tszName[30];
mir_sntprintf(tszName, SIZEOF(tszName), _T("MUI_%s"), szName);
DWORD dwLength = cbLen * sizeof(TCHAR);
if (ERROR_SUCCESS == RegQueryValueEx(hSubKey, tszName, NULL, NULL, (unsigned char *)tszTempBuf, &dwLength))
{
tszTempBuf[min(dwLength / sizeof(TCHAR), cbLen - 1)] = 0;
if (pfnSHLoadIndirectString)
pfnSHLoadIndirectString(StrConvU(tszTempBuf), szBuf, cbLen, NULL);
}
}
if (szBuf[0] == 0)
{
DWORD dwLength = cbLen * sizeof(wchar_t);
RegQueryValueEx(hSubKey, szName, NULL, NULL, (unsigned char *)szBuf, &dwLength);
szBuf[min(dwLength / sizeof(TCHAR), cbLen - 1)] = 0;
}
}
void RecalculateTime(void)
{
GetTimeZoneInformation(&myInfo.myTZ.tzi);
myInfo.timestamp = time(NULL);
myInfo.myTZ.offset = INT_MIN;
bool found = false;
DYNAMIC_TIME_ZONE_INFORMATION dtzi;
if (pfnGetDynamicTimeZoneInformation && pfnGetDynamicTimeZoneInformation(&dtzi) != TIME_ZONE_ID_INVALID)
{
TCHAR *myTzKey = mir_u2t(dtzi.TimeZoneKeyName);
_tcscpy(myInfo.myTZ.tszName, myTzKey);
mir_free(myTzKey);
found = true;
}
for (int i = 0; i < g_timezones.getCount(); ++i)
{
MIM_TIMEZONE &tz = g_timezones[i];
if (tz.offset != INT_MIN) tz.offset = INT_MIN;
if ( !found)
{
if ( !wcscmp(tz.tzi.StandardName, myInfo.myTZ.tzi.StandardName) ||
!wcscmp(tz.tzi.DaylightName, myInfo.myTZ.tzi.DaylightName))
{
_tcscpy(myInfo.myTZ.tszName, tz.tszName);
found = true;
}
}
}
}
void InitTimeZones(void)
{
REG_TZI_FORMAT tzi;
HKEY hKey;
const TCHAR *tszKey = IsWinVerNT() ?
_T("SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Time Zones") :
_T("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Time Zones");
/*
* use GetDynamicTimeZoneInformation() on Vista+ - this will return a structure with
* the registry key name, so finding our own time zone later will be MUCH easier for
* localized systems or systems with a MUI pack installed
*/
if (IsWinVerVistaPlus())
pfnGetDynamicTimeZoneInformation = (pfnGetDynamicTimeZoneInformation_t)GetProcAddress(GetModuleHandle(_T("kernel32")), "GetDynamicTimeZoneInformation");
if (IsWinVer2000Plus())
{
pfnSHLoadIndirectString = (pfnSHLoadIndirectString_t)GetProcAddress(GetModuleHandle(_T("shlwapi")), "SHLoadIndirectString");
pfnGetSystemDefaultUILanguage = (pfnGetSystemDefaultUILanguage_t)GetProcAddress(GetModuleHandle(_T("kernel32")), "GetSystemDefaultUILanguage");
pfnGetUserDefaultUILanguage = (pfnGetUserDefaultUILanguage_t)GetProcAddress(GetModuleHandle(_T("kernel32")), "GetUserDefaultUILanguage");
muiInstalled = pfnSHLoadIndirectString && pfnGetSystemDefaultUILanguage() != pfnGetUserDefaultUILanguage();
}
pfnSendMessageW = (pfnSendMessageW_t)GetProcAddress(GetModuleHandle(_T("user32")), "SendMessageW");
if (ERROR_SUCCESS == RegOpenKeyEx(HKEY_LOCAL_MACHINE, tszKey, 0, KEY_ENUMERATE_SUB_KEYS, &hKey))
{
DWORD dwIndex = 0;
HKEY hSubKey;
TCHAR tszName[MIM_TZ_NAMELEN];
DWORD dwSize = SIZEOF(tszName);
while (ERROR_NO_MORE_ITEMS != RegEnumKeyEx(hKey, dwIndex++, tszName, &dwSize, NULL, NULL, 0, NULL))
{
if (ERROR_SUCCESS == RegOpenKeyEx(hKey, tszName, 0, KEY_QUERY_VALUE, &hSubKey))
{
dwSize = sizeof(tszName);
DWORD dwLength = sizeof(tzi);
if (ERROR_SUCCESS != RegQueryValueEx(hSubKey, _T("TZI"), NULL, NULL, (unsigned char *)&tzi, &dwLength))
continue;
MIM_TIMEZONE *tz = new MIM_TIMEZONE;
tz->tzi.Bias = tzi.Bias;
tz->tzi.StandardDate = tzi.StandardDate;
tz->tzi.StandardBias = tzi.StandardBias;
tz->tzi.DaylightDate = tzi.DaylightDate;
tz->tzi.DaylightBias = tzi.DaylightBias;
_tcscpy(tz->tszName, tszName);
tz->hash = mir_hashstrT(tszName);
tz->offset = INT_MIN;
GetLocalizedString(hSubKey, _T("Display"), tz->szDisplay, SIZEOF(tz->szDisplay));
GetLocalizedString(hSubKey, _T("Std"), tz->tzi.StandardName, SIZEOF(tz->tzi.StandardName));
GetLocalizedString(hSubKey, _T("Dlt"), tz->tzi.DaylightName, SIZEOF(tz->tzi.DaylightName));
g_timezones.insert(tz);
g_timezonesBias.insert(tz);
RegCloseKey(hSubKey);
}
dwSize = SIZEOF(tszName);
}
RegCloseKey(hKey);
}
RecalculateTime();
}
void UninitTimeZones(void)
{
g_timezonesBias.destroy();
g_timezones.destroy();
}
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