Update ICU to 58.1

source/common/uts46.cpp

Index: source/common/uts46.cpp
diff --git a/source/common/uts46.cpp b/source/common/uts46.cpp
index 13a1f246c21cc91ee67a2aa2bafe76db85c5bd14..7bc4f925caca0ba26bababf5596f18423a571a5b 100644
--- a/source/common/uts46.cpp
+++ b/source/common/uts46.cpp
@@ -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) 2010-2015, International Business Machines
@@ -68,7 +70,7 @@ isASCIIOkBiDi(const char *s, int32_t length);
 IDNA::~IDNA() {}
 
 void
-IDNA::labelToASCII_UTF8(const StringPiece &label, ByteSink &dest,
+IDNA::labelToASCII_UTF8(StringPiece label, ByteSink &dest,
                         IDNAInfo &info, UErrorCode &errorCode) const {
     if(U_SUCCESS(errorCode)) {
         UnicodeString destString;
@@ -78,7 +80,7 @@ IDNA::labelToASCII_UTF8(const StringPiece &label, ByteSink &dest,
 }
 
 void
-IDNA::labelToUnicodeUTF8(const StringPiece &label, ByteSink &dest,
+IDNA::labelToUnicodeUTF8(StringPiece label, ByteSink &dest,
                          IDNAInfo &info, UErrorCode &errorCode) const {
     if(U_SUCCESS(errorCode)) {
         UnicodeString destString;
@@ -88,7 +90,7 @@ IDNA::labelToUnicodeUTF8(const StringPiece &label, ByteSink &dest,
 }
 
 void
-IDNA::nameToASCII_UTF8(const StringPiece &name, ByteSink &dest,
+IDNA::nameToASCII_UTF8(StringPiece name, ByteSink &dest,
                        IDNAInfo &info, UErrorCode &errorCode) const {
     if(U_SUCCESS(errorCode)) {
         UnicodeString destString;
@@ -98,7 +100,7 @@ IDNA::nameToASCII_UTF8(const StringPiece &name, ByteSink &dest,
 }
 
 void
-IDNA::nameToUnicodeUTF8(const StringPiece &name, ByteSink &dest,
+IDNA::nameToUnicodeUTF8(StringPiece name, ByteSink &dest,
                         IDNAInfo &info, UErrorCode &errorCode) const {
     if(U_SUCCESS(errorCode)) {
         UnicodeString destString;
@@ -131,19 +133,19 @@ public:
                   IDNAInfo &info, UErrorCode &errorCode) const;
 
     virtual void
-    labelToASCII_UTF8(const StringPiece &label, ByteSink &dest,
+    labelToASCII_UTF8(StringPiece label, ByteSink &dest,
                       IDNAInfo &info, UErrorCode &errorCode) const;
 
     virtual void
-    labelToUnicodeUTF8(const StringPiece &label, ByteSink &dest,
+    labelToUnicodeUTF8(StringPiece label, ByteSink &dest,
                        IDNAInfo &info, UErrorCode &errorCode) const;
 
     virtual void
-    nameToASCII_UTF8(const StringPiece &name, ByteSink &dest,
+    nameToASCII_UTF8(StringPiece name, ByteSink &dest,
                      IDNAInfo &info, UErrorCode &errorCode) const;
 
     virtual void
-    nameToUnicodeUTF8(const StringPiece &name, ByteSink &dest,
+    nameToUnicodeUTF8(StringPiece name, ByteSink &dest,
                       IDNAInfo &info, UErrorCode &errorCode) const;
 
 private:
@@ -154,7 +156,7 @@ private:
             IDNAInfo &info, UErrorCode &errorCode) const;
 
     void
-    processUTF8(const StringPiece &src,
+    processUTF8(StringPiece src,
                 UBool isLabel, UBool toASCII,
                 ByteSink &dest,
                 IDNAInfo &info, UErrorCode &errorCode) const;
@@ -251,25 +253,25 @@ UTS46::nameToUnicode(const UnicodeString &name, UnicodeString &dest,
 }
 
 void
-UTS46::labelToASCII_UTF8(const StringPiece &label, ByteSink &dest,
+UTS46::labelToASCII_UTF8(StringPiece label, ByteSink &dest,
                          IDNAInfo &info, UErrorCode &errorCode) const {
     processUTF8(label, TRUE, TRUE, dest, info, errorCode);
 }
 
 void
-UTS46::labelToUnicodeUTF8(const StringPiece &label, ByteSink &dest,
+UTS46::labelToUnicodeUTF8(StringPiece label, ByteSink &dest,
                           IDNAInfo &info, UErrorCode &errorCode) const {
     processUTF8(label, TRUE, FALSE, dest, info, errorCode);
 }
 
 void
-UTS46::nameToASCII_UTF8(const StringPiece &name, ByteSink &dest,
+UTS46::nameToASCII_UTF8(StringPiece name, ByteSink &dest,
                         IDNAInfo &info, UErrorCode &errorCode) const {
     processUTF8(name, FALSE, TRUE, dest, info, errorCode);
 }
 
 void
-UTS46::nameToUnicodeUTF8(const StringPiece &name, ByteSink &dest,
+UTS46::nameToUnicodeUTF8(StringPiece name, ByteSink &dest,
                          IDNAInfo &info, UErrorCode &errorCode) const {
     processUTF8(name, FALSE, FALSE, dest, info, errorCode);
 }
@@ -401,7 +403,7 @@ UTS46::process(const UnicodeString &src,
 }
 
 void
-UTS46::processUTF8(const StringPiece &src,
+UTS46::processUTF8(StringPiece src,
                    UBool isLabel, UBool toASCII,
                    ByteSink &dest,
                    IDNAInfo &info, UErrorCode &errorCode) const {