/**
* Main Windows time zone detection function. Returns the Windows
* time zone, translated to an ICU time zone, or NULL upon failure.
*/
U_CFUNC const char* U_EXPORT2
uprv_detectWindowsTimeZone() {
UErrorCode status = U_ZERO_ERROR;
UResourceBundle* bundle = NULL;
char* icuid = NULL;
char apiStdName[MAX_LENGTH_ID];
#if U_PLATFORM != U_PF_DURANGO
char regStdName[MAX_LENGTH_ID];
#endif // U_PLATFORM != U_PF_DURANGO
char tmpid[MAX_LENGTH_ID];
int32_t len;
int id;
int errorCode;
#if U_PLATFORM == U_PF_DURANGO
wchar_t ISOcodeW[3]; /* 2 letter iso code */
#endif
char ISOcode[3]; /* 2 letter iso code */
LONG result;
#if U_PLATFORM != U_PF_DURANGO
TZI tziKey;
TZI tziReg;
#endif // U_PLATFORM != U_PF_DURANGO
TIME_ZONE_INFORMATION apiTZI;
/* Obtain TIME_ZONE_INFORMATION from the API, and then convert it
to TZI. We could also interrogate the registry directly; we do
this below if needed. */
uprv_memset(&apiTZI, 0, sizeof(apiTZI));
#if U_PLATFORM != U_PF_DURANGO
uprv_memset(&tziKey, 0, sizeof(tziKey));
uprv_memset(&tziReg, 0, sizeof(tziReg));
#endif // U_PLATFORM != U_PF_DURANGO
GetTimeZoneInformation(&apiTZI);
#if U_PLATFORM != U_PF_DURANGO
tziKey.bias = apiTZI.Bias;
uprv_memcpy((char *)&tziKey.standardDate, (char*)&apiTZI.StandardDate,
sizeof(apiTZI.StandardDate));
uprv_memcpy((char *)&tziKey.daylightDate, (char*)&apiTZI.DaylightDate,
sizeof(apiTZI.DaylightDate));
#endif // U_PLATFORM != U_PF_DURANGO
/* Convert the wchar_t* standard name to char* */
uprv_memset(apiStdName, 0, sizeof(apiStdName));
wcstombs(apiStdName, apiTZI.StandardName, MAX_LENGTH_ID);
tmpid[0] = 0;
id = GetUserGeoID(GEOCLASS_NATION);
#if U_PLATFORM == U_PF_DURANGO
errorCode = GetGeoInfoW(id,GEO_ISO2,ISOcodeW,3,0);
wcstombs(ISOcode, ISOcodeW, 3);
#else
errorCode = GetGeoInfoA(id,GEO_ISO2,ISOcode,3,0);
#endif
bundle = ures_openDirect(NULL, "windowsZones", &status);
ures_getByKey(bundle, "mapTimezones", bundle, &status);
/* Note: We get the winid not from static tables but from resource bundle. */
while (U_SUCCESS(status) && ures_hasNext(bundle)) {
UBool idFound = FALSE;
const char* winid;
UResourceBundle* winTZ = ures_getNextResource(bundle, NULL, &status);
if (U_FAILURE(status)) {
break;
}
winid = ures_getKey(winTZ);
#if U_PLATFORM != U_PF_DURANGO
result = getTZI(winid, &tziReg);
if (result == ERROR_SUCCESS)
#endif // U_PLATFORM != U_PF_DURANGO
{
#if U_PLATFORM != U_PF_DURANGO
/* Windows alters the DaylightBias in some situations.
Using the bias and the rules suffices, so overwrite
these unreliable fields. */
tziKey.standardBias = tziReg.standardBias;
tziKey.daylightBias = tziReg.daylightBias;
#endif // U_PLATFORM != U_PF_DURANGO
#if U_PLATFORM != U_PF_DURANGO
if (uprv_memcmp((char *)&tziKey, (char*)&tziReg, sizeof(tziKey)) == 0)
#endif // U_PLATFORM != U_PF_DURANGO
{
const UChar* icuTZ = NULL;
if (errorCode != 0) {
icuTZ = ures_getStringByKey(winTZ, ISOcode, &len, &status);
}
if (errorCode==0 || icuTZ==NULL) {
/* fallback to default "001" and reset status */
status = U_ZERO_ERROR;
icuTZ = ures_getStringByKey(winTZ, "001", &len, &status);
}
#if U_PLATFORM != U_PF_DURANGO
if (U_SUCCESS(status)) {
/* Get the standard name from the registry key to compare with
the one from Windows API call. */
uprv_memset(regStdName, 0, sizeof(regStdName));
result = getSTDName(winid, regStdName, sizeof(regStdName));
if (result == ERROR_SUCCESS) {
if (uprv_strcmp(apiStdName, regStdName) == 0) {
#endif // U_PLATFORM != U_PF_DURANGO
idFound = TRUE;
#if U_PLATFORM != U_PF_DURANGO
}
}
#endif // U_PLATFORM != U_PF_DURANGO
/* tmpid buffer holds the ICU timezone ID corresponding to the timezone ID from Windows.
* If none is found, tmpid buffer will contain a fallback ID (i.e. the time zone ID matching
* the current time zone information)
*/
if (idFound || tmpid[0] == 0) {
/* if icuTZ has more than one city, take only the first (i.e. terminate icuTZ at first space) */
int index=0;
while (! (*icuTZ == '\0' || *icuTZ ==' ')) {
tmpid[index++]=(char)(*icuTZ++); /* safe to assume 'char' is ASCII compatible on windows */
}
tmpid[index]='\0';
}
#if U_PLATFORM != U_PF_DURANGO
}
#endif // U_PLATFORM != U_PF_DURANGO
}
}
ures_close(winTZ);
if (idFound) {
break;
}
}
/*
* Copy the timezone ID to icuid to be returned.
*/
if (tmpid[0] != 0) {
len = uprv_strlen(tmpid);
icuid = (char*)uprv_calloc(len + 1, sizeof(char));
if (icuid != NULL) {
uprv_strcpy(icuid, tmpid);
}
}
ures_close(bundle);
return icuid;
}
/**
* Main Windows time zone detection function. Returns the Windows
* time zone, translated to an ICU time zone, or NULL upon failure.
*/
U_CFUNC const char* U_EXPORT2
uprv_detectWindowsTimeZone() {
UErrorCode status = U_ZERO_ERROR;
UResourceBundle* bundle = NULL;
char* icuid = NULL;
char apiStdName[MAX_LENGTH_ID];
char regStdName[MAX_LENGTH_ID];
char tmpid[MAX_LENGTH_ID];
int32_t len;
int id;
int errorCode;
UChar ISOcodeW[3]; /* 2 letter iso code in UTF-16*/
char ISOcodeA[3]; /* 2 letter iso code in ansi */
LONG result;
TZI tziKey;
TZI tziReg;
TIME_ZONE_INFORMATION apiTZI;
BOOL isVistaOrHigher;
BOOL tryPreVistaFallback;
OSVERSIONINFO osVerInfo;
/* Obtain TIME_ZONE_INFORMATION from the API, and then convert it
to TZI. We could also interrogate the registry directly; we do
this below if needed. */
uprv_memset(&apiTZI, 0, sizeof(apiTZI));
uprv_memset(&tziKey, 0, sizeof(tziKey));
uprv_memset(&tziReg, 0, sizeof(tziReg));
GetTimeZoneInformation(&apiTZI);
tziKey.bias = apiTZI.Bias;
uprv_memcpy((char *)&tziKey.standardDate, (char*)&apiTZI.StandardDate,
sizeof(apiTZI.StandardDate));
uprv_memcpy((char *)&tziKey.daylightDate, (char*)&apiTZI.DaylightDate,
sizeof(apiTZI.DaylightDate));
/* Convert the wchar_t* standard name to char* */
uprv_memset(apiStdName, 0, sizeof(apiStdName));
wcstombs(apiStdName, apiTZI.StandardName, MAX_LENGTH_ID);
tmpid[0] = 0;
id = GetUserGeoID(GEOCLASS_NATION);
errorCode = GetGeoInfoW(id,GEO_ISO2,ISOcodeW,3,0);
u_strToUTF8(ISOcodeA, 3, NULL, ISOcodeW, 3, &status);
bundle = ures_openDirect(NULL, "windowsZones", &status);
ures_getByKey(bundle, "mapTimezones", bundle, &status);
/*
Windows Vista+ provides us with a "TimeZoneKeyName" that is not localized
and can be used to directly map a name in our bundle. Try to use that first
if we're on Vista or higher
*/
uprv_memset(&osVerInfo, 0, sizeof(osVerInfo));
osVerInfo.dwOSVersionInfoSize = sizeof(osVerInfo);
GetVersionEx(&osVerInfo);
isVistaOrHigher = osVerInfo.dwMajorVersion >= 6; /* actually includes Windows Server 2008 as well, but don't worry about it */
tryPreVistaFallback = TRUE;
if(isVistaOrHigher) {
result = getTZKeyName(regStdName, sizeof(regStdName));
if(ERROR_SUCCESS == result) {
UResourceBundle* winTZ = ures_getByKey(bundle, regStdName, NULL, &status);
if(U_SUCCESS(status)) {
const UChar* icuTZ = NULL;
if (errorCode != 0) {
icuTZ = ures_getStringByKey(winTZ, ISOcodeA, &len, &status);
}
if (errorCode==0 || icuTZ==NULL) {
/* fallback to default "001" and reset status */
status = U_ZERO_ERROR;
icuTZ = ures_getStringByKey(winTZ, "001", &len, &status);
}
if(U_SUCCESS(status)) {
int index=0;
while (! (*icuTZ == '\0' || *icuTZ ==' ')) {
tmpid[index++]=(char)(*icuTZ++); /* safe to assume 'char' is ASCII compatible on windows */
}
tmpid[index]='\0';
tryPreVistaFallback = FALSE;
}
}
ures_close(winTZ);
}
}
if(tryPreVistaFallback) {
/* Note: We get the winid not from static tables but from resource bundle. */
while (U_SUCCESS(status) && ures_hasNext(bundle)) {
UBool idFound = FALSE;
const char* winid;
UResourceBundle* winTZ = ures_getNextResource(bundle, NULL, &status);
if (U_FAILURE(status)) {
break;
}
winid = ures_getKey(winTZ);
result = getTZI(winid, &tziReg);
if (result == ERROR_SUCCESS) {
/* Windows alters the DaylightBias in some situations.
Using the bias and the rules suffices, so overwrite
these unreliable fields. */
tziKey.standardBias = tziReg.standardBias;
tziKey.daylightBias = tziReg.daylightBias;
if (uprv_memcmp((char *)&tziKey, (char*)&tziReg, sizeof(tziKey)) == 0) {
const UChar* icuTZ = NULL;
if (errorCode != 0) {
icuTZ = ures_getStringByKey(winTZ, ISOcodeA, &len, &status);
}
if (errorCode==0 || icuTZ==NULL) {
/* fallback to default "001" and reset status */
status = U_ZERO_ERROR;
icuTZ = ures_getStringByKey(winTZ, "001", &len, &status);
}
if (U_SUCCESS(status)) {
/* Get the standard name from the registry key to compare with
the one from Windows API call. */
uprv_memset(regStdName, 0, sizeof(regStdName));
result = getSTDName(winid, regStdName, sizeof(regStdName));
if (result == ERROR_SUCCESS) {
if (uprv_strcmp(apiStdName, regStdName) == 0) {
idFound = TRUE;
}
}
/* tmpid buffer holds the ICU timezone ID corresponding to the timezone ID from Windows.
* If none is found, tmpid buffer will contain a fallback ID (i.e. the time zone ID matching
* the current time zone information)
*/
if (idFound || tmpid[0] == 0) {
/* if icuTZ has more than one city, take only the first (i.e. terminate icuTZ at first space) */
int index=0;
while (! (*icuTZ == '\0' || *icuTZ ==' ')) {
tmpid[index++]=(char)(*icuTZ++); /* safe to assume 'char' is ASCII compatible on windows */
}
tmpid[index]='\0';
}
}
}
}
ures_close(winTZ);
if (idFound) {
break;
}
}
}
/*
* Copy the timezone ID to icuid to be returned.
*/
if (tmpid[0] != 0) {
len = uprv_strlen(tmpid);
icuid = (char*)uprv_calloc(len + 1, sizeof(char));
if (icuid != NULL) {
uprv_strcpy(icuid, tmpid);
}
}
ures_close(bundle);
return icuid;
}
int
main (int argc, char **argv)
{
BOOL ret;
HKEY hkey, skey;
WCHAR keyname[256], stdname[256], std2name[256], country[10], *spc;
GEOID geo;
int opt, idx, gotit = -1;
setlocale (LC_ALL, "");
while ((opt = getopt_long (argc, argv, opts, longopts, NULL)) != EOF)
switch (opt)
{
case 'h':
usage (stdout);
return 0;
case 'V':
print_version ();
return 0;
default:
fprintf (stderr, "Try `%s --help' for more information.\n",
program_invocation_short_name);
return 1;
}
if (optind < argc)
{
usage (stderr);
return 1;
}
/* First fetch current timezone information from registry. */
hkey = reg_open (HKEY_LOCAL_MACHINE, REG_TZINFO, "timezone information");
if (!hkey)
return 1;
/* Vista introduced the TimeZoneKeyName value, which simplifies the
job a lot. */
if (!reg_query (hkey, L"TimeZoneKeyName", keyname, sizeof keyname, NULL))
{
/* Pre-Vista we have a lot more to do. First fetch the name of the
Standard (non-DST) timezone. If we can't get that, give up. */
if (!reg_query (hkey, L"StandardName", stdname, sizeof stdname,
"timezone information"))
{
reg_close (hkey);
return 1;
}
reg_close (hkey);
/* Now open the timezone database registry key. Every subkey is a
timezone. The key name is what we're after, but to find the right
one, we have to compare the name of the previously fetched
"StandardName" with the "Std" value in the timezone info... */
hkey = reg_open (HKEY_LOCAL_MACHINE, REG_TZDB, "timezone database");
if (!hkey)
return 1;
for (idx = 0; reg_enum (hkey, idx, keyname, sizeof keyname); ++idx)
{
skey = reg_open (hkey, keyname, NULL);
if (skey)
{
/* ...however, on MUI-enabled machines, the names are not stored
directly in the above StandardName, rather it is a resource
pointer into tzres.dll. This is stored in MUI_Std.
Fortunately it's easy to recognize this situation: If
StandardName starts with @, it's a resource pointer, otherwise
it's the cleartext value. */
ret = reg_query (skey, stdname[0] == L'@' ? L"MUI_Std" : L"Std",
std2name, sizeof std2name, NULL);
reg_close (skey);
if (ret && !wcscmp (stdname, std2name))
break;
}
}
}
reg_close (hkey);
/* We fetch the current Geo-location of the user and convert it to an
ISO 3166-1 compatible nation code. */
*country = L'\0';
geo = GetUserGeoID (GEOCLASS_NATION);
if (geo != GEOID_NOT_AVAILABLE)
GetGeoInfoW (geo, GEO_ISO2, country, sizeof country, 0);
/* If, for some reason, the Geo-location isn't available, we use the locale
setting instead. */
if (!*country)
GetLocaleInfoW (LOCALE_USER_DEFAULT, LOCALE_SISO3166CTRYNAME,
country, sizeof country);
/* Now iterate over the mapping table and find the right entry. */
for (idx = 0; idx < TZMAP_SIZE; ++idx)
{
if (!wcscmp (keyname, tzmap[idx].win_tzkey))
{
if (gotit < 0)
gotit = idx;
if (!wcscmp (country, tzmap[idx].country))
break;
}
else if (gotit >= 0)
{
idx = gotit;
break;
}
}
if (idx >= TZMAP_SIZE)
{
if (gotit < 0)
{
fprintf (stderr,
"%s: can't find matching POSIX timezone for "
"Windows timezone \"%ls\"\n",
program_invocation_short_name, keyname);
return 1;
}
idx = gotit;
}
/* Got one. Print it.
Note: The tzmap array is in the R/O data section on x86_64. Don't
try to overwrite the space, as the code did originally. */
spc = wcschr (tzmap[idx].posix_tzid, L' ');
if (!spc)
spc = wcschr (tzmap[idx].posix_tzid, L'\0');
printf ("%.*ls\n", (int) (spc - tzmap[idx].posix_tzid), tzmap[idx].posix_tzid);
return 0;
}
