Update ICU to 58.1

source/common/udataswp.h

Index: source/common/udataswp.h
diff --git a/source/common/udataswp.h b/source/common/udataswp.h
index 66c849556767086eab1b5fb9b032ef506700dc71..07e06c221a7075963bf00b3edd75dbaad1bc01eb 100644
--- a/source/common/udataswp.h
+++ b/source/common/udataswp.h
@@ -1,3 +1,5 @@
+// Copyright (C) 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
 /*
 *******************************************************************************
 *
@@ -318,6 +320,20 @@ uprv_compareInvEbcdic(const UDataSwapper *ds,
                       const char *outString, int32_t outLength,
                       const UChar *localString, int32_t localLength);
 
+/**
+ * \def uprv_compareInvWithUChar
+ * Compare an invariant-character strings with a UChar string
+ * @internal
+ */
+#if U_CHARSET_FAMILY==U_ASCII_FAMILY
+#   define uprv_compareInvWithUChar uprv_compareInvAscii
+#elif U_CHARSET_FAMILY==U_EBCDIC_FAMILY
+#   define uprv_compareInvWithUChar uprv_compareInvEbcdic
+#else
+#   error Unknown charset family!
+#endif
+
+
 /* material... -------------------------------------------------------------- */
 
 #if 0