Bug 20981: On Windows, check TZ for timezone first

bdd0303a · Arthur Edelstein · Georg Koppen · 0ee3aa4c · bdd0303a
Commit bdd0303a authored Jan 14, 2017 by Arthur Edelstein Committed by Georg Koppen Mar 3, 2017
--- a/intl/icu/source/common/putil.cpp
+++ b/intl/icu/source/common/putil.cpp
@@ -984,6 +984,11 @@ uprv_tzname(int n)
 {
    const char *tzid = NULL;
 #if U_PLATFORM_USES_ONLY_WIN32_API
+    char* envValue = getenv("TZ");
+    if (envValue != NULL) {
+        return uprv_strdup(envValue);
+    }
+
    tzid = uprv_detectWindowsTimeZone();

    if (tzid != NULL) {