Update ICU to 58.1

source/common/ustr_imp.h

Index: source/common/ustr_imp.h
diff --git a/source/common/ustr_imp.h b/source/common/ustr_imp.h
index a746016d2c2faff399757a4c3d5ef81bbd195ee5..34a69363a765d629236ef5e0eb04d7777e6e0d00 100644
--- a/source/common/ustr_imp.h
+++ b/source/common/ustr_imp.h
@@ -1,3 +1,5 @@
+// Copyright (C) 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
 /*  
 **********************************************************************
 *   Copyright (C) 1999-2015, International Business Machines
@@ -218,6 +220,44 @@ ucasemap_mapUTF8(const UCaseMap *csm,
                  UTF8CaseMapper *stringCaseMapper,
                  UErrorCode *pErrorCode);
 
+#ifdef __cplusplus
+
+U_NAMESPACE_BEGIN
+namespace GreekUpper {
+
+// Data bits.
+static const uint32_t UPPER_MASK = 0x3ff;
+static const uint32_t HAS_VOWEL = 0x1000;
+static const uint32_t HAS_YPOGEGRAMMENI = 0x2000;
+static const uint32_t HAS_ACCENT = 0x4000;
+static const uint32_t HAS_DIALYTIKA = 0x8000;
+// Further bits during data building and processing, not stored in the data map.
+static const uint32_t HAS_COMBINING_DIALYTIKA = 0x10000;
+static const uint32_t HAS_OTHER_GREEK_DIACRITIC = 0x20000;
+
+static const uint32_t HAS_VOWEL_AND_ACCENT = HAS_VOWEL | HAS_ACCENT;
+static const uint32_t HAS_VOWEL_AND_ACCENT_AND_DIALYTIKA =
+        HAS_VOWEL_AND_ACCENT | HAS_DIALYTIKA;
+static const uint32_t HAS_EITHER_DIALYTIKA = HAS_DIALYTIKA | HAS_COMBINING_DIALYTIKA;
+
+// State bits.
+static const uint32_t AFTER_CASED = 1;
+static const uint32_t AFTER_VOWEL_WITH_ACCENT = 2;
+
+uint32_t getLetterData(UChar32 c);
+
+/**
+ * Returns a non-zero value for each of the Greek combining diacritics
+ * listed in The Unicode Standard, version 8, chapter 7.2 Greek,
+ * plus some perispomeni look-alikes.
+ */
+uint32_t getDiacriticData(UChar32 c);
+
+}  // namespace GreekUpper
+U_NAMESPACE_END
+
+#endif  // __cplusplus
+
 U_CAPI int32_t U_EXPORT2 
 ustr_hashUCharsN(const UChar *str, int32_t length);