| // © 2016 and later: Unicode, Inc. and others. |
| // License & terms of use: http://www.unicode.org/copyright.html |
| /* |
| ******************************************************************************** |
| * Copyright (C) 2005-2015, International Business Machines |
| * Corporation and others. All Rights Reserved. |
| ******************************************************************************** |
| * |
| * File WINTZ.CPP |
| * |
| ******************************************************************************** |
| */ |
| |
| #include "unicode/utypes.h" |
| |
| #if U_PLATFORM_USES_ONLY_WIN32_API |
| |
| #include "wintz.h" |
| #include "cmemory.h" |
| #include "cstring.h" |
| |
| #include "unicode/ures.h" |
| #include "unicode/ustring.h" |
| #include "uresimp.h" |
| |
| #ifndef WIN32_LEAN_AND_MEAN |
| # define WIN32_LEAN_AND_MEAN |
| #endif |
| # define VC_EXTRALEAN |
| # define NOUSER |
| # define NOSERVICE |
| # define NOIME |
| # define NOMCX |
| #include <windows.h> |
| |
| U_NAMESPACE_BEGIN |
| |
| // The max size of TimeZoneKeyName is 128, defined in DYNAMIC_TIME_ZONE_INFORMATION |
| #define MAX_TIMEZONE_ID_LENGTH 128 |
| |
| /** |
| * Main Windows time zone detection function. |
| * Returns the Windows time zone converted to an ICU time zone as a heap-allocated buffer, or nullptr upon failure. |
| * Note: We use the Win32 API GetDynamicTimeZoneInformation to get the current time zone info. |
| * This API returns a non-localized time zone name, which we can then map to an ICU time zone name. |
| */ |
| U_INTERNAL const char* U_EXPORT2 |
| uprv_detectWindowsTimeZone() |
| { |
| UErrorCode status = U_ZERO_ERROR; |
| char* icuid = nullptr; |
| char dynamicTZKeyName[MAX_TIMEZONE_ID_LENGTH]; |
| char tmpid[MAX_TIMEZONE_ID_LENGTH]; |
| int32_t len; |
| int id = GEOID_NOT_AVAILABLE; |
| int errorCode; |
| wchar_t ISOcodeW[3] = {}; /* 2 letter ISO code in UTF-16 */ |
| char ISOcode[3] = {}; /* 2 letter ISO code in UTF-8 */ |
| |
| DYNAMIC_TIME_ZONE_INFORMATION dynamicTZI; |
| uprv_memset(&dynamicTZI, 0, sizeof(dynamicTZI)); |
| uprv_memset(dynamicTZKeyName, 0, sizeof(dynamicTZKeyName)); |
| uprv_memset(tmpid, 0, sizeof(tmpid)); |
| |
| /* Obtain TIME_ZONE_INFORMATION from the API and get the non-localized time zone name. */ |
| if (TIME_ZONE_ID_INVALID == GetDynamicTimeZoneInformation(&dynamicTZI)) { |
| return nullptr; |
| } |
| |
| id = GetUserGeoID(GEOCLASS_NATION); |
| errorCode = GetGeoInfoW(id, GEO_ISO2, ISOcodeW, 3, 0); |
| |
| // convert from wchar_t* (UTF-16 on Windows) to char* (UTF-8). |
| u_strToUTF8(ISOcode, UPRV_LENGTHOF(ISOcode), nullptr, |
| reinterpret_cast<const UChar*>(ISOcodeW), UPRV_LENGTHOF(ISOcodeW), &status); |
| |
| LocalUResourceBundlePointer bundle(ures_openDirect(nullptr, "windowsZones", &status)); |
| ures_getByKey(bundle.getAlias(), "mapTimezones", bundle.getAlias(), &status); |
| |
| // convert from wchar_t* (UTF-16 on Windows) to char* (UTF-8). |
| u_strToUTF8(dynamicTZKeyName, UPRV_LENGTHOF(dynamicTZKeyName), nullptr, |
| reinterpret_cast<const UChar*>(dynamicTZI.TimeZoneKeyName), -1, &status); |
| |
| if (U_FAILURE(status)) { |
| return nullptr; |
| } |
| |
| if (dynamicTZI.TimeZoneKeyName[0] != 0) { |
| StackUResourceBundle winTZ; |
| ures_getByKey(bundle.getAlias(), dynamicTZKeyName, winTZ.getAlias(), &status); |
| |
| if (U_SUCCESS(status)) { |
| const UChar* icuTZ = nullptr; |
| if (errorCode != 0) { |
| icuTZ = ures_getStringByKey(winTZ.getAlias(), ISOcode, &len, &status); |
| } |
| if (errorCode == 0 || icuTZ == nullptr) { |
| /* fallback to default "001" and reset status */ |
| status = U_ZERO_ERROR; |
| icuTZ = ures_getStringByKey(winTZ.getAlias(), "001", &len, &status); |
| } |
| |
| if (U_SUCCESS(status)) { |
| int index = 0; |
| |
| while (!(*icuTZ == '\0' || *icuTZ == ' ')) { |
| // time zone IDs only contain ASCII invariant characters. |
| tmpid[index++] = (char)(*icuTZ++); |
| } |
| tmpid[index] = '\0'; |
| } |
| } |
| } |
| |
| // Copy the timezone ID to icuid to be returned. |
| if (tmpid[0] != 0) { |
| icuid = uprv_strdup(tmpid); |
| } |
| |
| return icuid; |
| } |
| |
| U_NAMESPACE_END |
| #endif /* U_PLATFORM_USES_ONLY_WIN32_API */ |