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In RtlQueryTimezoneInformation use information from the registry if it 

is available.
This commit is contained in:
Rein Klazes 2004-10-18 21:19:28 +00:00 committed by Alexandre Julliard
parent 715ea985b9
commit c5c93d186e
1 changed files with 87 additions and 7 deletions
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94
dlls/ntdll/time.c
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@ -58,6 +58,25 @@ static CRITICAL_SECTION_DEBUG critsect_debug =
};
static CRITICAL_SECTION TIME_GetBias_section = { &critsect_debug, -1, 0, 0, 0, 0 };
/* TimeZone registry key values */
static const WCHAR TZInformationKeyW[] = { 'M','a','c','h','i','n','e','\\',
'S','Y','S','T','E','M','\\','C','u','r','r','e','n','t','C','o','n','t','r',
'o','l','S','e','t','\\','C','o','n','t','r','o','l','\\','T','i','m','e','z',
'o','n','e','I','n','f','o','r','m','a','t','i','o','n', 0};
static const WCHAR TZStandardStartW[] = {
'S','t','a','n','d','a','r','d','s','t','a','r','t', 0};
static const WCHAR TZDaylightStartW[] = {
'D','a','y','l','i','g','h','t','s','t','a','r','t', 0};
static const WCHAR TZDaylightBiasW[] = {
'D','a','y','l','i','g','h','t','B','i','a','s', 0};
static const WCHAR TZStandardBiasW[] = {
'S','t','a','n','d','a','r','d','B','i','a','s', 0};
static const WCHAR TZBiasW[] = {'B','i','a','s', 0};
static const WCHAR TZDaylightNameW[] = {
'D','a','y','l','i','g','h','t','N','a','m','e', 0};
static const WCHAR TZStandardNameW[] = {
'S','t','a','n','d','a','r','d','N','a','m','e', 0};
#define SETTIME_MAX_ADJUST 120
@ -780,6 +799,62 @@ static const WCHAR* TIME_GetTZAsStr (time_t utc, int bias, int dst)
return NULL;
}
/*** TIME_GetTimeZoneInfoFromReg: helper for GetTimeZoneInformation ***/
static int TIME_GetTimeZoneInfoFromReg(LPTIME_ZONE_INFORMATION tzinfo)
{
BYTE buf[90];
KEY_VALUE_PARTIAL_INFORMATION * KpInfo =
(KEY_VALUE_PARTIAL_INFORMATION *) buf;
HKEY hkey;
DWORD size;
OBJECT_ATTRIBUTES attr;
UNICODE_STRING nameW;
attr.Length = sizeof(attr);
attr.RootDirectory = 0;
attr.ObjectName = &nameW;
attr.Attributes = 0;
attr.SecurityDescriptor = NULL;
attr.SecurityQualityOfService = NULL;
RtlInitUnicodeString( &nameW, TZInformationKeyW);
if (!NtOpenKey( &hkey, KEY_ALL_ACCESS, &attr )) {
#define GTZIFR_N( valkey, tofield) \
RtlInitUnicodeString( &nameW, valkey );\
if (!NtQueryValueKey( hkey, &nameW, KeyValuePartialInformation, KpInfo,\
sizeof(buf), &size )) { \
if( size >= (sizeof((tofield)) + \
offsetof(KEY_VALUE_PARTIAL_INFORMATION,Data))); { \
memcpy(&(tofield), \
KpInfo->Data, sizeof(tofield)); \
} \
}
#define GTZIFR_S( valkey, tofield) \
RtlInitUnicodeString( &nameW, valkey );\
if (!NtQueryValueKey( hkey, &nameW, KeyValuePartialInformation, KpInfo,\
sizeof(buf), &size )) { \
strncpyW( tofield, (WCHAR*) KpInfo->Data, \
sizeof( tofield) / sizeof(WCHAR) ); \
}
GTZIFR_N( TZStandardStartW, tzinfo->StandardDate)
GTZIFR_N( TZDaylightStartW, tzinfo->DaylightDate)
GTZIFR_N( TZBiasW, tzinfo->Bias)
GTZIFR_N( TZStandardBiasW, tzinfo->StandardBias)
GTZIFR_N( TZDaylightBiasW, tzinfo->DaylightBias)
GTZIFR_S( TZStandardNameW, tzinfo->StandardName)
GTZIFR_S( TZDaylightNameW, tzinfo->DaylightName)
#undef GTZIFR_N
#undef GTZIFR_S
NtClose( hkey );
return 1;
}
return 0;
}
/***********************************************************************
* RtlQueryTimeZoneInformation [NTDLL.@]
*
@ -800,14 +875,19 @@ NTSTATUS WINAPI RtlQueryTimeZoneInformation(LPTIME_ZONE_INFORMATION tzinfo)
memset(tzinfo, 0, sizeof(TIME_ZONE_INFORMATION));
gmt = time(NULL);
bias = TIME_GetBias(gmt, &daylight);
if( !TIME_GetTimeZoneInfoFromReg(tzinfo)) {
tzinfo->Bias = -bias / 60;
tzinfo->StandardBias = 0;
tzinfo->DaylightBias = -60;
psTZ = TIME_GetTZAsStr (gmt, (-bias/60), daylight);
if (psTZ) strcpyW( tzinfo->StandardName, psTZ );
gmt = time(NULL);
bias = TIME_GetBias(gmt, &daylight);
tzinfo->Bias = -bias / 60;
tzinfo->StandardBias = 0;
tzinfo->DaylightBias = -60;
tzinfo->StandardName[0]='\0';
tzinfo->DaylightName[0]='\0';
psTZ = TIME_GetTZAsStr (gmt, (-bias/60), daylight);
if (psTZ) strcpyW( tzinfo->StandardName, psTZ );
}
return STATUS_SUCCESS;
}