Adapt the remaining OUString functions to std string_view

...for LIBO_INTERNAL_ONLY.  These had been missed by
1b43cceaea2084a0489db68cd0113508f34b6643 "Make many OUString functions take
std::u16string_view parameters" because they did not match the multi-overload
pattern that was addressed there, but they nevertheless benefit from being
changed just as well (witness e.g. the various resulting changes from copy() to
subView()).

This showed a conversion from OStringChar to std::string_view to be missing
(while the corresponding conversion form OUStringChar to std::u16string_view was
already present).

The improvement to loplugin:stringadd became necessary to fix

> [CPT] compilerplugins/clang/test/stringadd.cxx
> error: 'error' diagnostics expected but not seen:
>   File ~/lo/core/compilerplugins/clang/test/stringadd.cxx Line 43 (directive at ~/lo/core/compilerplugins/clang/test/stringadd.cxx:42): simplify by merging with the preceding assignment [loplugin:stringadd]
>   File ~/lo/core/compilerplugins/clang/test/stringadd.cxx Line 61 (directive at ~/lo/core/compilerplugins/clang/test/stringadd.cxx:60): simplify by merging with the preceding assignment [loplugin:stringadd]
> 2 errors generated.

Change-Id: Ie40de0616a66e60e289c1af0ca60aed6f9ecc279
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/107602
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

avmedia/source/gstreamer/gstframegrabber.cxx

@@ -48,7 +48,7 @@ void FrameGrabber::disposePipeline()
     }
 }
 
-FrameGrabber::FrameGrabber( const OUString &rURL ) :
+FrameGrabber::FrameGrabber( std::u16string_view rURL ) :
     FrameGrabber_BASE()
 {
     gchar *pPipelineStr;
@@ -87,7 +87,7 @@ FrameGrabber::~FrameGrabber()
     disposePipeline();
 }
 
-FrameGrabber* FrameGrabber::create( const OUString &rURL )
+FrameGrabber* FrameGrabber::create( std::u16string_view rURL )
 {
     return new FrameGrabber( rURL );
 }

avmedia/source/gstreamer/gstframegrabber.hxx

@@ -19,6 +19,10 @@
 
 #pragma once
 
+#include <sal/config.h>
+
+#include <string_view>
+
 #include "gstplayer.hxx"
 #include <com/sun/star/media/XFrameGrabber.hpp>
 #include <cppuhelper/implbase.hxx>
@@ -39,7 +43,7 @@ public:
     const FrameGrabber& operator=(const FrameGrabber&) =delete;
 
     // static create method instead of public Ctor
-    static FrameGrabber* create( const OUString &rURL );
+    static FrameGrabber* create( std::u16string_view rURL );
 
     virtual ~FrameGrabber() override;
 
@@ -52,7 +56,7 @@ public:
     virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames(  ) override;
 
 private:
-    explicit FrameGrabber( const OUString &aURL );
+    explicit FrameGrabber( std::u16string_view aURL );
 };
 
 } // avmedia::gst

avmedia/source/gstreamer/gstplayer.cxx

@@ -527,7 +527,7 @@ GstBusSyncReply Player::processSyncMessage( GstMessage *message )
     return GST_BUS_PASS;
 }
 
-void Player::preparePlaybin( const OUString& rURL, GstElement *pSink )
+void Player::preparePlaybin( std::u16string_view rURL, GstElement *pSink )
 {
     if (mpPlaybin != nullptr)
     {

avmedia/source/gstreamer/gstplayer.hxx

@@ -19,6 +19,10 @@
 
 #pragma once
 
+#include <sal/config.h>
+
+#include <string_view>
+
 #include <osl/conditn.hxx>
 #include "gstcommon.hxx"
 
@@ -42,7 +46,7 @@ public:
     explicit Player();
     virtual ~Player() override;
 
-    void preparePlaybin( const OUString& rURL, GstElement *pSink );
+    void preparePlaybin( std::u16string_view rURL, GstElement *pSink );
     bool create( const OUString& rURL );
     void processMessage( GstMessage *message );
     GstBusSyncReply processSyncMessage( GstMessage *message );

basctl/source/basicide/baside2.hxx

@@ -35,6 +35,7 @@
 #include <rtl/ustrbuf.hxx>
 
 #include <set>
+#include <string_view>
 
 #include <vcl/textdata.hxx>
 #include <basic/codecompletecache.hxx>
@@ -58,7 +59,7 @@ class ModulWindowLayout;
 // tools Strings limited to 64K).
 // defined in baside2b.cxx
 OUString getTextEngineText (ExtTextEngine&);
-void setTextEngineText (ExtTextEngine&, OUString const&);
+void setTextEngineText (ExtTextEngine&, std::u16string_view);
 
 class EditorWindow final : public vcl::Window, public SfxListener
 {

basctl/source/basicide/baside2b.cxx

@@ -121,7 +121,7 @@ OUString getTextEngineText (ExtTextEngine& rEngine)
     return aText;
 }
 
-void setTextEngineText (ExtTextEngine& rEngine, OUString const& aStr)
+void setTextEngineText (ExtTextEngine& rEngine, std::u16string_view aStr)
 {
     rEngine.SetText(OUString());
     OString aUTF8Str = OUStringToOString( aStr, RTL_TEXTENCODING_UTF8 );

basic/source/classes/image.cxx

@@ -28,6 +28,7 @@
 #include <image.hxx>
 #include <codegen.hxx>
 #include <memory>
+#include <string_view>
 
 SbiImage::SbiImage()
     : bError(false)
@@ -459,7 +460,7 @@ bool SbiImage::Save( SvStream& r, sal_uInt32 nVer )
         for( size_t i = 0; i < mvStringOffsets.size(); i++ )
         {
             sal_uInt16 nOff = static_cast<sal_uInt16>(mvStringOffsets[ i ]);
-            OString aStr(OUStringToOString(OUString(pStrings.get() + nOff), eCharSet));
+            OString aStr(OUStringToOString(std::u16string_view(pStrings.get() + nOff), eCharSet));
             memcpy( pByteStrings.get() + nOff, aStr.getStr(), (aStr.getLength() + 1) * sizeof( char ) );
         }
         r.WriteUInt32( nStringSize );

basic/source/inc/iosys.hxx

@@ -20,6 +20,8 @@
 #pragma once
 
 #include <memory>
+#include <string_view>
+
 #include <tools/stream.hxx>
 #include <o3tl/typed_flags_set.hxx>
 
@@ -58,7 +60,7 @@ class SbiStream
 public:
     SbiStream();
    ~SbiStream();
-    ErrCode const & Open( const OString&, StreamMode, SbiStreamFlags, short );
+    ErrCode const & Open( std::string_view, StreamMode, SbiStreamFlags, short );
     ErrCode const & Close();
     ErrCode Read(OString&, sal_uInt16 = 0, bool bForceReadingPerByte=false);
     ErrCode const & Read( char& );
@@ -96,7 +98,7 @@ public:
     void  SetChannel( short n  )       { nChan = n;   }
     short GetChannel() const           { return nChan;}
     void  ResetChannel()               { nChan = 0;   }
-    void  Open( short, const OString&, StreamMode, SbiStreamFlags, short );
+    void  Open( short, std::string_view, StreamMode, SbiStreamFlags, short );
     void  Close();
     void  Read(OString&);
     char  Read();

basic/source/runtime/iosys.cxx

@@ -421,7 +421,7 @@ void    UCBStream::SetSize( sal_uInt64 )
 
 
 ErrCode const & SbiStream::Open
-( const OString& rName, StreamMode nStrmMode, SbiStreamFlags nFlags, short nL )
+( std::string_view rName, StreamMode nStrmMode, SbiStreamFlags nFlags, short nL )
 {
     nMode   = nFlags;
     nLen    = nL;
@@ -631,7 +631,7 @@ ErrCode SbiIoSystem::GetError()
     return n;
 }
 
-void SbiIoSystem::Open(short nCh, const OString& rName, StreamMode nMode, SbiStreamFlags nFlags, short nLen)
+void SbiIoSystem::Open(short nCh, std::string_view rName, StreamMode nMode, SbiStreamFlags nFlags, short nLen)
 {
     nError = ERRCODE_NONE;
     if( nCh >= CHANNELS || !nCh )

basic/source/runtime/methods.cxx

@@ -63,6 +63,7 @@
 #include <com/sun/star/bridge/oleautomation/XAutomationObject.hpp>
 #include <memory>
 #include <random>
+#include <string_view>
 #include <o3tl/char16_t2wchar_t.hxx>
 
 using namespace comphelper;
@@ -2575,7 +2576,7 @@ static OUString implSetupWildcard(const OUString& rFileParam, SbiRTLData& rRTLDa
     return aPathStr;
 }
 
-static bool implCheckWildcard(const OUString& rName, SbiRTLData const& rRTLData)
+static bool implCheckWildcard(std::u16string_view rName, SbiRTLData const& rRTLData)
 {
     bool bMatch = true;
 

basic/source/sbx/sbxvalue.cxx

@@ -20,6 +20,7 @@
 #include <config_features.h>
 
 #include <math.h>
+#include <string_view>
 
 #include <o3tl/float_int_conversion.hxx>
 #include <tools/debug.hxx>
@@ -1499,7 +1500,7 @@ bool SbxValue::LoadData( SvStream& r, sal_uInt16 )
                 }
                 else
                 {
-                    write_uInt16_lenPrefixed_uInt8s_FromOUString(r, OUString(), RTL_TEXTENCODING_ASCII_US);
+                    write_uInt16_lenPrefixed_uInt8s_FromOUString(r, std::u16string_view(), RTL_TEXTENCODING_ASCII_US);
             }
             break;
             case SbxERROR:

chart2/qa/extras/chart2dump/chart2dump.cxx

@@ -124,7 +124,7 @@ protected:
         {
             if (m_aReferenceFile.is_open())
                 m_aReferenceFile.close();
-            OString sReferenceFile = OUStringToOString(m_directories.getPathFromSrc(getReferenceDirName()) + sFileName, RTL_TEXTENCODING_UTF8);
+            OString sReferenceFile = OUStringToOString(OUString(m_directories.getPathFromSrc(getReferenceDirName()) + sFileName), RTL_TEXTENCODING_UTF8);
             m_aReferenceFile.open(sReferenceFile.getStr(), std::ios_base::in);
             CPPUNIT_ASSERT_MESSAGE(OString("Can't open reference file: " + sReferenceFile).getStr(), m_aReferenceFile.is_open());
         }
@@ -132,7 +132,7 @@ protected:
         {
             if (m_aDumpFile.is_open())
                 m_aDumpFile.close();
-            OString sDumpFile = OUStringToOString(m_directories.getPathFromSrc(getReferenceDirName()) + sFileName, RTL_TEXTENCODING_UTF8);
+            OString sDumpFile = OUStringToOString(OUString(m_directories.getPathFromSrc(getReferenceDirName()) + sFileName), RTL_TEXTENCODING_UTF8);
             m_aDumpFile.open(sDumpFile.getStr(), std::ios_base::out | std::ofstream::binary | std::ofstream::trunc);
             CPPUNIT_ASSERT_MESSAGE(OString("Can't open dump file: " + sDumpFile).getStr(), m_aDumpFile.is_open());
         }

chart2/qa/extras/chart2geometry.cxx

@@ -23,6 +23,7 @@
 #include <libxml/xpathInternals.h>
 
 #include <algorithm>
+#include <string_view>
 
 using uno::Reference;
 using beans::XPropertySet;
@@ -170,7 +171,7 @@ void Chart2GeometryTest::registerNamespaces(xmlXPathContextPtr& pXmlXPathCtx)
     }
 }
 
-static OString OU2O(const OUString& sOUSource)
+static OString OU2O(std::u16string_view sOUSource)
 {
     return rtl::OUStringToOString(sOUSource, RTL_TEXTENCODING_UTF8);
 }

chart2/qa/extras/xshape/chart2xshape.cxx

@@ -16,6 +16,7 @@
 #include <test/xmltesttools.hxx>
 
 #include <fstream>
+#include <string_view>
 
 class Chart2XShapeTest : public ChartTest, public XmlTestTools
 {
@@ -49,7 +50,7 @@ private:
 
 namespace
 {
-bool checkDumpAgainstFile(const OUString& rDump, const OUString& aFilePath)
+bool checkDumpAgainstFile(const OUString& rDump, std::u16string_view aFilePath)
 {
     OString aOFile = OUStringToOString(aFilePath, RTL_TEXTENCODING_UTF8);
 

chart2/source/controller/inc/ChartController.hxx

@@ -40,6 +40,7 @@
 #include <com/sun/star/lang/XMultiServiceFactory.hpp>
 
 #include <memory>
+#include <string_view>
 
 namespace com::sun::star::accessibility { class XAccessible; }
 namespace com::sun::star::accessibility { class XAccessibleContext; }
@@ -426,7 +427,7 @@ private:
 
     //executeDispatch methods
     void executeDispatch_ObjectProperties();
-    void executeDispatch_FormatObject( const OUString& rDispatchCommand );
+    void executeDispatch_FormatObject( std::u16string_view rDispatchCommand );
     void executeDlg_ObjectProperties( const OUString& rObjectCID );
     bool executeDlg_ObjectProperties_withoutUndoGuard( const OUString& rObjectCID, bool bSuccessOnUnchanged );
 

chart2/source/controller/main/ChartController_Properties.cxx

@@ -650,7 +650,7 @@ OUString lcl_getObjectCIDForCommand( std::string_view rDispatchCommand, const un
 }
 // anonymous namespace
 
-void ChartController::executeDispatch_FormatObject(const OUString& rDispatchCommand)
+void ChartController::executeDispatch_FormatObject(std::u16string_view rDispatchCommand)
 {
     uno::Reference< XChartDocument > xChartDocument( getModel(), uno::UNO_QUERY );
     OString aCommand( OUStringToOString( rDispatchCommand, RTL_TEXTENCODING_ASCII_US ) );

codemaker/source/codemaker/global.cxx

@@ -356,7 +356,7 @@ FileStream &operator<<(FileStream& o, const OStringBuffer& s) {
     return o;
 }
 
-FileStream & operator <<(FileStream & out, OUString const & s) {
+FileStream & operator <<(FileStream & out, std::u16string_view s) {
     return out << OUStringToOString(s, RTL_TEXTENCODING_UTF8);
 }
 

codemaker/source/commoncpp/commoncpp.cxx

@@ -63,7 +63,7 @@ OString scopedCppName(OString const & type, bool ns_alias)
 }
 
 OString translateUnoToCppType(
-    codemaker::UnoType::Sort sort, OUString const & nucleus)
+    codemaker::UnoType::Sort sort, std::u16string_view nucleus)
 {
     OStringBuffer buf;
     if (sort <= codemaker::UnoType::Sort::Any) {
@@ -75,7 +75,7 @@ OString translateUnoToCppType(
         buf.append(cppTypes[static_cast<int>(sort)]);
     } else {
         if (sort == codemaker::UnoType::Sort::Interface
-            && nucleus == "com.sun.star.uno.XInterface")
+            && nucleus == u"com.sun.star.uno.XInterface")
         {
             buf.append("::css::uno::XInterface");
         } else {

codemaker/source/cppumaker/cpputype.cxx

@@ -25,6 +25,7 @@
 #include <cstdlib>
 #include <map>
 #include <set>
+#include <string_view>
 #include <memory>
 #include <vector>
 #include <iostream>
@@ -164,7 +165,7 @@ public:
     void dump(CppuOptions const & options);
 
     void dumpFile(
-        OUString const & uri, OUString const & name, bool hpp,
+        std::u16string_view uri, OUString const & name, bool hpp,
         CppuOptions const & options);
 
     void dumpDependedTypes(
@@ -219,7 +220,7 @@ protected:
 
     OUString resolveOuterTypedefs(OUString const & name) const;
 
-    OUString resolveAllTypedefs(OUString const & name) const;
+    OUString resolveAllTypedefs(std::u16string_view name) const;
 
     codemaker::cpp::IdentifierTranslationMode isGlobal() const;
 
@@ -412,7 +413,7 @@ void CppuType::dump(CppuOptions const & options)
 }
 
 void CppuType::dumpFile(
-    OUString const & uri, OUString const & name, bool hpp,
+    std::u16string_view uri, OUString const & name, bool hpp,
     CppuOptions const & options)
 {
     OUString fileUri(
@@ -990,7 +991,7 @@ OUString CppuType::resolveOuterTypedefs(OUString const & name) const
     }
 }
 
-OUString CppuType::resolveAllTypedefs(OUString const & name) const
+OUString CppuType::resolveAllTypedefs(std::u16string_view name) const
 {
     sal_Int32 k1;
     OUString n(b2u(codemaker::UnoType::decompose(u2b(name), &k1)));
@@ -1126,11 +1127,11 @@ private:
     }
 
     void dumpExceptionTypeName(
-        FileStream & out, OUString const & prefix, sal_uInt32 index,
+        FileStream & out, std::u16string_view prefix, sal_uInt32 index,
-        OUString const & name) const;
+        std::u16string_view name) const;
 
     sal_Int32 dumpExceptionTypeNames(
-        FileStream & out, OUString const & prefix,
+        FileStream & out, std::u16string_view prefix,
         std::vector< OUString > const & exceptions, bool runtimeException) const;
 
     rtl::Reference< unoidl::InterfaceTypeEntity > entity_;
@@ -1456,9 +1457,9 @@ void InterfaceType::dumpCppuAttributes(FileStream & out, sal_uInt32 & index)
             << "::rtl::OUString sAttributeName" << n << "( \"" << name_
             << "::" << attr.name << "\" );\n";
         sal_Int32 getExcn = dumpExceptionTypeNames(
-                                out, "get", attr.getExceptions, false);
+                                out, u"get", attr.getExceptions, false);
         sal_Int32 setExcn = dumpExceptionTypeNames(
-                                out, "set", attr.setExceptions, false);
+                                out, u"set", attr.setExceptions, false);
         out << indent()
             << ("typelib_typedescription_newExtendedInterfaceAttribute("
                 " &pAttribute,\n");
@@ -1525,7 +1526,7 @@ void InterfaceType::dumpCppuMethods(FileStream & out, sal_uInt32 & index)
             ++m;
         }
         sal_Int32 excn = dumpExceptionTypeNames(
-                             out, "", method.exceptions,
+                             out, u"", method.exceptions,
                              method.name != "acquire" && method.name != "release");
         out << indent() << "::rtl::OUString sReturnType" << n << "( \""
             << returnType << "\" );\n" << indent()
@@ -1589,15 +1590,15 @@ void InterfaceType::dumpMethodsCppuDecl(
 }
 
 void InterfaceType::dumpExceptionTypeName(
-    FileStream & out, OUString const & prefix, sal_uInt32 index,
+    FileStream & out, std::u16string_view prefix, sal_uInt32 index,
-    OUString const & name) const
+    std::u16string_view name) const
 {
     out << indent() << "::rtl::OUString the_" << prefix << "ExceptionName"
         << index << "( \"" << name << "\" );\n";
 }
 
 sal_Int32 InterfaceType::dumpExceptionTypeNames(
-    FileStream & out, OUString const & prefix,
+    FileStream & out, std::u16string_view prefix,
     std::vector< OUString > const & exceptions, bool runtimeException) const
 {
     sal_Int32 count = 0;
@@ -1608,7 +1609,7 @@ sal_Int32 InterfaceType::dumpExceptionTypeNames(
     }
     if (runtimeException) {
         dumpExceptionTypeName(
-            out, prefix, count++, "com.sun.star.uno.RuntimeException");
+            out, prefix, count++, u"com.sun.star.uno.RuntimeException");
     }
     if (count != 0) {
         out << indent() << "rtl_uString * the_" << prefix << "Exceptions[] = {";
@@ -1765,7 +1766,7 @@ void ConstantGroup::dumpDeclaration(FileStream & out)
     }
 }
 
-void dumpTypeParameterName(FileStream & out, OUString const & name)
+void dumpTypeParameterName(FileStream & out, std::u16string_view name)
 {
     // Prefix all type parameters with "typeparam_" to avoid problems when a
     // struct member has the same name as a type parameter, as in
@@ -2722,7 +2723,7 @@ void PolyStructType::dumpTemplateParameters(FileStream & out) const
     out << " >";
 }
 
-OUString typeToIdentifier(OUString const & name)
+OUString typeToIdentifier(std::u16string_view name)
 {
     sal_Int32 k;
     OUString n(b2u(codemaker::UnoType::decompose(u2b(name), &k)));
@@ -3553,7 +3554,7 @@ private:
 };
 
 void failsToSupply(
-    FileStream & o, OUString const & service, OString const & type)
+    FileStream & o, std::u16string_view service, OString const & type)
 {
     o << "::rtl::OUString(\"component context fails to supply service \") + \""
       << service << "\" + \" of type \" + \"" << type << "\"";

codemaker/source/cppumaker/dumputils.cxx

@@ -70,7 +70,7 @@ bool dumpNamespaceClose(
 }
 
 void dumpTypeIdentifier(FileStream & out, OUString const & entityName) {
-    out << entityName.copy(entityName.lastIndexOf('.') + 1);
+    out << entityName.subView(entityName.lastIndexOf('.') + 1);
 }
 
 }

codemaker/source/cppumaker/includes.cxx

@@ -265,7 +265,7 @@ void Includes::dumpInclude(
         << (hpp ? "hpp" : "hdl") << "\"\n";
 }
 
-bool Includes::isInterfaceType(OString const & entityName) const {
+bool Includes::isInterfaceType(std::string_view entityName) const {
     return m_manager->getSort(b2u(entityName)) == UnoType::Sort::Interface;
 }
 

codemaker/source/cppumaker/includes.hxx

@@ -21,6 +21,7 @@
 
 #include <rtl/ref.hxx>
 #include <rtl/ustring.hxx>
+#include <string_view>
 #include <vector>
 #include "dependencies.hxx"
 
@@ -68,7 +69,7 @@ private:
     Includes(Includes const &) = delete;
     Includes& operator =(const Includes&) = delete;
 
-    bool isInterfaceType(OString const & entityName) const;
+    bool isInterfaceType(std::string_view entityName) const;
 
     rtl::Reference< TypeManager > m_manager;
     Dependencies::Map m_map;

comphelper/qa/string/test_string.cxx

@@ -91,7 +91,7 @@ public:
         const OUString& str1, sal_Int32 off1, sal_Int32 len1,
         const OUString& str2, sal_Int32 off2, sal_Int32 len2) override
     {
-        return str1.copy(off1, len1).compareTo(str2.copy(off2, len2));
+        return str1.copy(off1, len1).compareTo(str2.subView(off2, len2));
     }
     virtual sal_Int32 SAL_CALL compareString(
         const OUString& str1,
@@ -238,7 +238,7 @@ void TestString::testNatural()
     );
     // Original behavior
     CPPUNIT_ASSERT(
-        OUString("Heading 9").compareTo("Heading 10") > 0
+        OUString("Heading 9").compareTo(u"Heading 10") > 0
     );
     CPPUNIT_ASSERT(
         compareNatural("Heading 10", "Heading 9", xCollator, xBI, lang::Locale()) > 0
@@ -248,7 +248,7 @@ void TestString::testNatural()
         compareNatural("July, the 4th", "July, the 10th", xCollator, xBI, lang::Locale()) < 0
     );
     CPPUNIT_ASSERT(
-        OUString("July, the 4th").compareTo("July, the 10th") > 0
+        OUString("July, the 4th").compareTo(u"July, the 10th") > 0
     );
     CPPUNIT_ASSERT(
         compareNatural("July, the 10th", "July, the 4th", xCollator, xBI, lang::Locale()) > 0
@@ -258,7 +258,7 @@ void TestString::testNatural()
         compareNatural("abc08", "abc010", xCollator, xBI, lang::Locale()) < 0
     );
     CPPUNIT_ASSERT(
-        OUString("abc08").compareTo("abc010") > 0
+        OUString("abc08").compareTo(u"abc010") > 0
     );
     CPPUNIT_ASSERT(
         compareNatural("abc010", "abc08", xCollator, xBI, lang::Locale()) > 0

comphelper/source/misc/docpasswordhelper.cxx

@@ -20,6 +20,7 @@
 #include <config_gpgme.h>
 
 #include <algorithm>
+#include <string_view>
 
 #include <comphelper/docpasswordhelper.hxx>
 #include <comphelper/storagehelper.hxx>
@@ -56,11 +57,11 @@ using namespace ::com::sun::star;
 namespace comphelper {
 
 
-static uno::Sequence< sal_Int8 > GeneratePBKDF2Hash( const OUString& aPassword, const uno::Sequence< sal_Int8 >& aSalt, sal_Int32 nCount, sal_Int32 nHashLength )
+static uno::Sequence< sal_Int8 > GeneratePBKDF2Hash( std::u16string_view aPassword, const uno::Sequence< sal_Int8 >& aSalt, sal_Int32 nCount, sal_Int32 nHashLength )
 {
     uno::Sequence< sal_Int8 > aResult;
 
-    if ( !aPassword.isEmpty() && aSalt.hasElements() && nCount && nHashLength )
+    if ( !aPassword.empty() && aSalt.hasElements() && nCount && nHashLength )
     {
         OString aBytePass = OUStringToOString( aPassword, RTL_TEXTENCODING_UTF8 );
         // FIXME this is subject to the SHA1-bug tdf#114939 - see also
@@ -84,7 +85,7 @@ IDocPasswordVerifier::~IDocPasswordVerifier()
 }
 
 
-uno::Sequence< beans::PropertyValue > DocPasswordHelper::GenerateNewModifyPasswordInfo( const OUString& aPassword )
+uno::Sequence< beans::PropertyValue > DocPasswordHelper::GenerateNewModifyPasswordInfo( std::u16string_view aPassword )
 {
     uno::Sequence< beans::PropertyValue > aResult;
 
@@ -109,10 +110,10 @@ uno::Sequence< beans::PropertyValue > DocPasswordHelper::GenerateNewModifyPasswo
 }
 
 
-bool DocPasswordHelper::IsModifyPasswordCorrect( const OUString& aPassword, const uno::Sequence< beans::PropertyValue >& aInfo )
+bool DocPasswordHelper::IsModifyPasswordCorrect( std::u16string_view aPassword, const uno::Sequence< beans::PropertyValue >& aInfo )
 {
     bool bResult = false;
-    if ( !aPassword.isEmpty() && aInfo.hasElements() )
+    if ( !aPassword.empty() && aInfo.hasElements() )
     {
         OUString sAlgorithm;
         uno::Sequence< sal_Int8 > aSalt;
@@ -223,7 +224,7 @@ sal_uInt32 DocPasswordHelper::GetWordHashAsUINT32(
 
 
 sal_uInt16 DocPasswordHelper::GetXLHashAsUINT16(
-                const OUString& aUString,
+                std::u16string_view aUString,
                 rtl_TextEncoding nEnc )
 {
     sal_uInt16 nResult = 0;
@@ -248,7 +249,7 @@ sal_uInt16 DocPasswordHelper::GetXLHashAsUINT16(
 
 
 Sequence< sal_Int8 > DocPasswordHelper::GetXLHashAsSequence(
-                const OUString& aUString )
+                std::u16string_view aUString )
 {
     sal_uInt16 nHash = GetXLHashAsUINT16( aUString );
     return {sal_Int8(nHash >> 8), sal_Int8(nHash & 0xFF)};

comphelper/source/misc/storagehelper.cxx

@@ -379,11 +379,11 @@ uno::Reference< embed::XStorage > OStorageHelper::GetStorageOfFormatFromStream(
 }
 
 
-uno::Sequence< beans::NamedValue > OStorageHelper::CreatePackageEncryptionData( const OUString& aPassword )
+uno::Sequence< beans::NamedValue > OStorageHelper::CreatePackageEncryptionData( std::u16string_view aPassword )
 {
     // TODO/LATER: Should not the method be part of DocPasswordHelper?
     uno::Sequence< beans::NamedValue > aEncryptionData;
-    if ( !aPassword.isEmpty() )
+    if ( !aPassword.empty() )
     {
         sal_Int32 nSha1Ind = 0;
         // generate SHA256 start key

compilerplugins/clang/stringadd.cxx

@@ -291,7 +291,9 @@ bool StringAdd::isSideEffectFree(Expr const* expr)
     {
         // check for calls through OUString::number/OUString::unacquired
         if (auto calleeMethodDecl = dyn_cast_or_null<CXXMethodDecl>(callExpr->getCalleeDecl()))
-            if (calleeMethodDecl && calleeMethodDecl->getIdentifier())
+            if (calleeMethodDecl)
+            {
+                if (calleeMethodDecl->getIdentifier())
                 {
                     auto name = calleeMethodDecl->getName();
                     if (callExpr->getNumArgs() > 0
@@ -306,6 +308,22 @@ bool StringAdd::isSideEffectFree(Expr const* expr)
                         }
                     }
                 }
+                else if (auto const d = dyn_cast<CXXConversionDecl>(calleeMethodDecl))
+                {
+                    if (loplugin::TypeCheck(d->getConversionType())
+                            .ClassOrStruct("basic_string_view")
+                            .StdNamespace())
+                    {
+                        auto const tc = loplugin::TypeCheck(calleeMethodDecl->getParent());
+                        if (tc.Class("OUString").Namespace("rtl").GlobalNamespace()
+                            || tc.Class("OString").Namespace("rtl").GlobalNamespace())
+                        {
+                            if (isSideEffectFree(callExpr->getCallee()))
+                                return true;
+                        }
+                    }
+                }
+            }
         if (auto calleeFunctionDecl = dyn_cast_or_null<FunctionDecl>(callExpr->getCalleeDecl()))
             if (calleeFunctionDecl && calleeFunctionDecl->getIdentifier())
             {

connectivity/source/commontools/CommonTools.cxx

@@ -141,7 +141,7 @@ namespace connectivity
         return aRet;
     }
 
-    bool existsJavaClassByName( const ::rtl::Reference< jvmaccess::VirtualMachine >& _pJVM,const OUString& _sClassName )
+    bool existsJavaClassByName( const ::rtl::Reference< jvmaccess::VirtualMachine >& _pJVM,std::u16string_view _sClassName )
     {
         bool bRet = false;
         if ( _pJVM.is() )

connectivity/source/commontools/DriversConfig.cxx

@@ -144,7 +144,7 @@ DriversConfig& DriversConfig::operator=( const DriversConfig& _rhs )
 }
 
 
-OUString DriversConfig::getDriverFactoryName(const OUString& _sURL) const
+OUString DriversConfig::getDriverFactoryName(std::u16string_view _sURL) const
 {
     const TInstalledDrivers& rDrivers = m_aNode->getInstalledDrivers(m_xORB);
     OUString sRet;
@@ -162,7 +162,7 @@ OUString DriversConfig::getDriverFactoryName(const OUString& _sURL) const
     return sRet;
 }
 
-OUString DriversConfig::getDriverTypeDisplayName(const OUString& _sURL) const
+OUString DriversConfig::getDriverTypeDisplayName(std::u16string_view _sURL) const
 {
     const TInstalledDrivers& rDrivers = m_aNode->getInstalledDrivers(m_xORB);
     OUString sRet;
@@ -180,22 +180,25 @@ OUString DriversConfig::getDriverTypeDisplayName(const OUString& _sURL) const
     return sRet;
 }
 
-const ::comphelper::NamedValueCollection& DriversConfig::getProperties(const OUString& _sURL) const
+const ::comphelper::NamedValueCollection& DriversConfig::getProperties(std::u16string_view _sURL)
+    const
 {
     return impl_get(_sURL,1);
 }
 
-const ::comphelper::NamedValueCollection& DriversConfig::getFeatures(const OUString& _sURL) const
+const ::comphelper::NamedValueCollection& DriversConfig::getFeatures(std::u16string_view _sURL)
+    const
 {
     return impl_get(_sURL,0);
 }
 
-const ::comphelper::NamedValueCollection& DriversConfig::getMetaData(const OUString& _sURL) const
+const ::comphelper::NamedValueCollection& DriversConfig::getMetaData(std::u16string_view _sURL)
+    const
 {
     return impl_get(_sURL,2);
 }
 
-const ::comphelper::NamedValueCollection& DriversConfig::impl_get(const OUString& _sURL,sal_Int32 _nProps) const
+const ::comphelper::NamedValueCollection& DriversConfig::impl_get(std::u16string_view _sURL,sal_Int32 _nProps) const
 {
     const TInstalledDrivers& rDrivers = m_aNode->getInstalledDrivers(m_xORB);
     const ::comphelper::NamedValueCollection* pRet = nullptr;

connectivity/source/drivers/dbase/dindexnode.cxx

@@ -760,7 +760,7 @@ int ONDXKey::Compare(const ONDXKey& rKey) const
     }
     else if (IsText(getDBType()))
     {
-        nRes = getValue().getString().compareTo(rKey.getValue());
+        nRes = getValue().getString().compareTo(rKey.getValue().getString());
     }
     else
     {

connectivity/source/drivers/evoab2/NStatement.cxx

@@ -17,6 +17,10 @@
  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  */
 
+#include <sal/config.h>
+
+#include <string_view>
+
 #include <osl/diagnose.h>
 #include <rtl/ustring.hxx>
 #include <sal/log.hxx>
@@ -54,9 +58,9 @@ EBookQuery * createTrue()
     return e_book_query_from_string("(exists \"full_name\")");
 }
 
-EBookQuery * createTest( const OUString &aColumnName,
+EBookQuery * createTest( std::u16string_view aColumnName,
                              EBookQueryTest eTest,
-                             const OUString &aMatch )
+                             std::u16string_view aMatch )
 {
     OString sMatch = OUStringToOString( aMatch, RTL_TEXTENCODING_UTF8 );
     OString sColumnName = OUStringToOString( aColumnName, RTL_TEXTENCODING_UTF8 );
@@ -364,7 +368,7 @@ EBookQuery *OCommonStatement::whereAnalysis( const OSQLParseNode* parseTree )
         {
             // String containing only a '%' and nothing else matches everything
             pResult = createTest( aColumnName, E_BOOK_QUERY_CONTAINS,
-                                  "" );
+                                  u"" );
         }
         else if( aMatchString.indexOf( WILDCARD ) == -1 )
         {   // Simple string , eg. "to match" "contains in evo"
@@ -381,9 +385,10 @@ EBookQuery *OCommonStatement::whereAnalysis( const OSQLParseNode* parseTree )
         else if( aMatchString.indexOf ( WILDCARD ) == aMatchString.lastIndexOf ( WILDCARD ) )
         {   // One occurrence of '%'  matches...
             if ( aMatchString.startsWith(OUStringChar(WILDCARD)) )
-                pResult = createTest( aColumnName, E_BOOK_QUERY_ENDS_WITH, aMatchString.copy( 1 ) );
+                pResult = createTest(
+                    aColumnName, E_BOOK_QUERY_ENDS_WITH, aMatchString.subView( 1 ) );
             else if ( aMatchString.indexOf ( WILDCARD ) == aMatchString.getLength() - 1 )
-                pResult = createTest( aColumnName, E_BOOK_QUERY_BEGINS_WITH, aMatchString.copy( 0, aMatchString.getLength() - 1 ) );
+                pResult = createTest( aColumnName, E_BOOK_QUERY_BEGINS_WITH, aMatchString.subView( 0, aMatchString.getLength() - 1 ) );
             else
                 m_xConnection->throwGenericSQLException(STR_QUERY_LIKE_WILDCARD,*this);
         }
@@ -391,7 +396,7 @@ EBookQuery *OCommonStatement::whereAnalysis( const OSQLParseNode* parseTree )
                  aMatchString.startsWith(OUStringChar(WILDCARD)) &&
                  aMatchString.indexOf ( WILDCARD, 1) == aMatchString.getLength() - 1 ) {
             // one '%' at the start and another at the end
-            pResult = createTest( aColumnName, E_BOOK_QUERY_CONTAINS, aMatchString.copy (1, aMatchString.getLength() - 2) );
+            pResult = createTest( aColumnName, E_BOOK_QUERY_CONTAINS, aMatchString.subView (1, aMatchString.getLength() - 2) );
         }
         else
             m_xConnection->throwGenericSQLException(STR_QUERY_LIKE_WILDCARD_MANY,*this);

connectivity/source/drivers/file/FStringFunctions.cxx

@@ -43,7 +43,7 @@ ORowSetValue OOp_Ascii::operate(const ORowSetValue& lhs) const
 {
     if (lhs.isNull())
         return lhs;
-    OString sStr(OUStringToOString(lhs, RTL_TEXTENCODING_ASCII_US));
+    OString sStr(OUStringToOString(lhs.getString(), RTL_TEXTENCODING_ASCII_US));
     sal_Int32 nAscii = sStr.toChar();
     return nAscii;
 }

connectivity/source/drivers/firebird/StatementCommonBase.cxx

@@ -124,7 +124,7 @@ void SAL_CALL OStatementCommonBase::close()
     dispose();
 }
 
-void OStatementCommonBase::prepareAndDescribeStatement(const OUString& sql,
+void OStatementCommonBase::prepareAndDescribeStatement(std::u16string_view sql,
                                                       XSQLDA*& pOutSqlda,
                                                       XSQLDA* pInSqlda)
 {

connectivity/source/drivers/firebird/StatementCommonBase.hxx

@@ -20,6 +20,10 @@
 #ifndef INCLUDED_CONNECTIVITY_SOURCE_DRIVERS_FIREBIRD_STATEMENTCOMMONBASE_HXX
 #define INCLUDED_CONNECTIVITY_SOURCE_DRIVERS_FIREBIRD_STATEMENTCOMMONBASE_HXX
 
+#include <sal/config.h>
+
+#include <string_view>
+
 #include "Connection.hxx"
 #include "SubComponent.hxx"
 
@@ -81,7 +85,7 @@ namespace connectivity::firebird
             virtual ~OStatementCommonBase() override;
 
             /// @throws css::sdbc::SQLException
-            void prepareAndDescribeStatement(const OUString& sqlIn,
+            void prepareAndDescribeStatement(std::u16string_view sqlIn,
                                              XSQLDA*& pOutSqlda,
                                              XSQLDA* pInSqlda=nullptr);
 

connectivity/source/drivers/jdbc/Class.cxx

@@ -36,7 +36,7 @@ jclass java_lang_Class::getMyClass() const
     return theClass;
 }
 
-java_lang_Class* java_lang_Class::forName(const OUString& _par0)
+java_lang_Class* java_lang_Class::forName(std::u16string_view _par0)
 {
     jobject out(nullptr);
     SDBThreadAttach t;

connectivity/source/drivers/odbc/ODatabaseMetaDataResultSet.cxx

@@ -822,7 +822,7 @@ void ODatabaseMetaDataResultSet::openTypeInfo()
 }
 
 void ODatabaseMetaDataResultSet::openTables(const Any& catalog, const OUString& schemaPattern,
-                            const OUString& tableNamePattern,
+                            std::u16string_view tableNamePattern,
                             const Sequence< OUString >& types )
 {
     OString aPKQ,aPKO,aPKN,aCOL;
@@ -919,7 +919,8 @@ void ODatabaseMetaDataResultSet::openSchemas()
 }
 
 void ODatabaseMetaDataResultSet::openColumnPrivileges(  const Any& catalog, const OUString& schema,
-                                        const OUString& table,   const OUString& columnNamePattern )
+                                        std::u16string_view table,
+                                        std::u16string_view columnNamePattern )
 {
     const OUString *pSchemaPat = nullptr;
 
@@ -953,7 +954,7 @@ void ODatabaseMetaDataResultSet::openColumnPrivileges(  const Any& catalog, cons
 }
 
 void ODatabaseMetaDataResultSet::openColumns(   const Any& catalog,             const OUString& schemaPattern,
-                                const OUString& tableNamePattern,    const OUString& columnNamePattern )
+                                std::u16string_view tableNamePattern,    std::u16string_view columnNamePattern )
 {
     const OUString *pSchemaPat = nullptr;
 
@@ -1020,7 +1021,7 @@ void ODatabaseMetaDataResultSet::openColumns(   const Any& catalog,
 }
 
 void ODatabaseMetaDataResultSet::openProcedureColumns(  const Any& catalog,     const OUString& schemaPattern,
-                                const OUString& procedureNamePattern,const OUString& columnNamePattern )
+                                std::u16string_view procedureNamePattern,std::u16string_view columnNamePattern )
 {
     const OUString *pSchemaPat = nullptr;
 
@@ -1053,7 +1054,7 @@ void ODatabaseMetaDataResultSet::openProcedureColumns(  const Any& catalog,
 }
 
 void ODatabaseMetaDataResultSet::openProcedures(const Any& catalog, const OUString& schemaPattern,
-                                const OUString& procedureNamePattern)
+                                std::u16string_view procedureNamePattern)
 {
     const OUString *pSchemaPat = nullptr;
 
@@ -1083,11 +1084,11 @@ void ODatabaseMetaDataResultSet::openProcedures(const Any& catalog, const OUStri
 }
 
 void ODatabaseMetaDataResultSet::openSpecialColumns(bool _bRowVer,const Any& catalog, const OUString& schema,
-                                    const OUString& table,sal_Int32 scope,   bool nullable )
+                                    std::u16string_view table,sal_Int32 scope,   bool nullable )
 {
     // Some ODBC drivers really don't like getting an empty string as tableName
     // E.g. psqlodbc up to at least version 09.01.0100 segfaults
-    if (table.isEmpty())
+    if (table.empty())
     {
         const char errMsg[] = "ODBC: Trying to get special columns of empty table name";
         const char SQLState[] = "HY009";
@@ -1123,13 +1124,13 @@ void ODatabaseMetaDataResultSet::openSpecialColumns(bool _bRowVer,const Any& cat
 }
 
 void ODatabaseMetaDataResultSet::openVersionColumns(const Any& catalog, const OUString& schema,
-                                    const OUString& table)
+                                    std::u16string_view table)
 {
     openSpecialColumns(true,catalog,schema,table,SQL_SCOPE_TRANSACTION,false);
 }
 
 void ODatabaseMetaDataResultSet::openBestRowIdentifier( const Any& catalog, const OUString& schema,
-                                        const OUString& table,sal_Int32 scope,bool nullable )
+                                        std::u16string_view table,sal_Int32 scope,bool nullable )
 {
     openSpecialColumns(false,catalog,schema,table,scope,nullable);
 }
@@ -1198,7 +1199,7 @@ void ODatabaseMetaDataResultSet::openExportedKeys(const Any& catalog, const OUSt
 }
 
 void ODatabaseMetaDataResultSet::openPrimaryKeys(const Any& catalog, const OUString& schema,
-                                  const OUString& table)
+                                  std::u16string_view table)
 {
     const OUString *pSchemaPat = nullptr;
 
@@ -1228,7 +1229,7 @@ void ODatabaseMetaDataResultSet::openPrimaryKeys(const Any& catalog, const OUStr
 }
 
 void ODatabaseMetaDataResultSet::openTablePrivileges(const Any& catalog, const OUString& schemaPattern,
-                                  const OUString& tableNamePattern)
+                                  std::u16string_view tableNamePattern)
 {
     const OUString *pSchemaPat = nullptr;
 
@@ -1257,7 +1258,7 @@ void ODatabaseMetaDataResultSet::openTablePrivileges(const Any& catalog, const O
 }
 
 void ODatabaseMetaDataResultSet::openIndexInfo( const Any& catalog, const OUString& schema,
-                                const OUString& table, bool unique, bool approximate )
+                                std::u16string_view table, bool unique, bool approximate )
 {
     const OUString *pSchemaPat = nullptr;
 

connectivity/source/drivers/odbc/OStatement.cxx

@@ -833,7 +833,7 @@ void OStatement_Base::setMaxFieldSize(sal_Int64 _par0)
     setStmtOption<SQLULEN, SQL_IS_UINTEGER>(SQL_ATTR_MAX_LENGTH, _par0);
 }
 
-void OStatement_Base::setCursorName(const OUString &_par0)
+void OStatement_Base::setCursorName(std::u16string_view _par0)
 {
     OSL_ENSURE(m_aStatementHandle,"StatementHandle is null!");
     OString aName(OUStringToOString(_par0,getOwnConnection()->getTextEncoding()));

connectivity/source/drivers/postgresql/pq_connection.cxx

@@ -443,7 +443,7 @@ void Connection::initialize( const Sequence< Any >& aArguments )
         nColon = url.indexOf( ':' , 1+ nColon );
         if( nColon != -1 )
         {
-             o = OUStringToOString( url.copy(nColon+1), ConnectionSettings::encoding );
+             o = OUStringToOString( url.subView(nColon+1), ConnectionSettings::encoding );
         }
     }
     {

connectivity/source/drivers/postgresql/pq_statement.cxx

@@ -61,6 +61,7 @@
 #include <com/sun/star/container/XEnumerationAccess.hpp>
 
 #include <string.h>
+#include <string_view>
 
 using osl::MutexGuard;
 
@@ -239,7 +240,7 @@ sal_Int32 Statement::executeUpdate( const OUString& sql )
 /// @throws SQLException
 static void raiseSQLException(
     const Reference< XInterface> & owner,
-    const OString & sql,
+    std::string_view sql,
     const char * errorMsg,
     const char *errorType = nullptr )
 {

connectivity/source/drivers/postgresql/pq_tools.cxx

@@ -57,6 +57,7 @@
 
 #include <libpq-fe.h>
 #include <string.h>
+#include <string_view>
 
 using com::sun::star::beans::XPropertySet;
 
@@ -91,16 +92,16 @@ OUString concatQualified( const OUString & a, const OUString &b)
     return a + "." + b;
 }
 
-static OString iOUStringToOString( const OUString& str, ConnectionSettings const *settings) {
+static OString iOUStringToOString( std::u16string_view str, ConnectionSettings const *settings) {
     OSL_ENSURE(settings, "pgsql-sdbc: OUStringToOString got NULL settings");
-    return OUStringToOString( str, ConnectionSettings::encoding );
+    return rtl::OUStringToOString( str, ConnectionSettings::encoding );
 }
 
-OString OUStringToOString( const OUString& str, ConnectionSettings const *settings) {
+OString OUStringToOString( std::u16string_view str, ConnectionSettings const *settings) {
     return iOUStringToOString( str, settings );
 }
 
-void bufferEscapeConstant( OUStringBuffer & buf, const OUString & value, ConnectionSettings *settings )
+void bufferEscapeConstant( OUStringBuffer & buf, std::u16string_view value, ConnectionSettings *settings )
 {
 
     OString y = iOUStringToOString( value, settings );
@@ -127,14 +128,14 @@ void bufferEscapeConstant( OUStringBuffer & buf, const OUString & value, Connect
     buf.append( OStringToOUString( strbuf.makeStringAndClear(), RTL_TEXTENCODING_UTF8 ) );
 }
 
-static void ibufferQuoteConstant( OUStringBuffer & buf, const OUString & value, ConnectionSettings *settings )
+static void ibufferQuoteConstant( OUStringBuffer & buf, std::u16string_view value, ConnectionSettings *settings )
 {
     buf.append( "'" );
     bufferEscapeConstant( buf, value, settings );
     buf.append( "'" );
 }
 
-void bufferQuoteConstant( OUStringBuffer & buf, const OUString & value, ConnectionSettings *settings )
+void bufferQuoteConstant( OUStringBuffer & buf, std::u16string_view value, ConnectionSettings *settings )
 {
     return ibufferQuoteConstant( buf, value, settings );
 }
@@ -151,7 +152,7 @@ void bufferQuoteAnyConstant( OUStringBuffer & buf, const Any &val, ConnectionSet
         buf.append( "NULL" );
 }
 
-static void ibufferQuoteIdentifier( OUStringBuffer & buf, const OUString &toQuote, ConnectionSettings *settings )
+static void ibufferQuoteIdentifier( OUStringBuffer & buf, std::u16string_view toQuote, ConnectionSettings *settings )
 {
     OSL_ENSURE(settings, "pgsql-sdbc: bufferQuoteIdentifier got NULL settings");
 
@@ -171,14 +172,14 @@ static void ibufferQuoteIdentifier( OUStringBuffer & buf, const OUString &toQuot
     PQfreemem( cstr );
 }
 
-void bufferQuoteIdentifier( OUStringBuffer & buf, const OUString &toQuote, ConnectionSettings *settings )
+void bufferQuoteIdentifier( OUStringBuffer & buf, std::u16string_view toQuote, ConnectionSettings *settings )
 {
     return ibufferQuoteIdentifier(buf, toQuote, settings);
 }
 
 
 void bufferQuoteQualifiedIdentifier(
-    OUStringBuffer & buf, const OUString &schema, const OUString &table, ConnectionSettings *settings )
+    OUStringBuffer & buf, std::u16string_view schema, std::u16string_view table, ConnectionSettings *settings )
 {
     ibufferQuoteIdentifier(buf, schema, settings);
     buf.append( "." );
@@ -187,9 +188,9 @@ void bufferQuoteQualifiedIdentifier(
 
 void bufferQuoteQualifiedIdentifier(
     OUStringBuffer & buf,
-    const OUString &schema,
+    std::u16string_view schema,
-    const OUString &table,
+    std::u16string_view table,
-    const OUString &col,
+    std::u16string_view col,
     ConnectionSettings *settings)
 {
     ibufferQuoteIdentifier(buf, schema, settings);
@@ -544,10 +545,10 @@ void tokenizeSQL( const OString & sql, std::vector< OString > &vec  )
 }
 
 
-void splitConcatenatedIdentifier( const OUString & source, OUString *first, OUString *second)
+void splitConcatenatedIdentifier( std::u16string_view source, OUString *first, OUString *second)
 {
     std::vector< OString > vec;
-    tokenizeSQL( OUStringToOString( source, RTL_TEXTENCODING_UTF8 ), vec );
+    tokenizeSQL( rtl::OUStringToOString( source, RTL_TEXTENCODING_UTF8 ), vec );
     switch (vec.size())
     {
     case 1:

connectivity/source/drivers/postgresql/pq_tools.hxx

@@ -57,28 +57,28 @@ bool isWhitespace( sal_Unicode c );
 
 OUString concatQualified( const OUString & a, const OUString &b);
 
-OString OUStringToOString( const OUString& str, ConnectionSettings const *settings);
+OString OUStringToOString( std::u16string_view str, ConnectionSettings const *settings);
 
-void bufferQuoteConstant( OUStringBuffer & buf, const OUString & str, ConnectionSettings *settings );
+void bufferQuoteConstant( OUStringBuffer & buf, std::u16string_view str, ConnectionSettings *settings );
 void bufferQuoteAnyConstant( OUStringBuffer & buf, const css::uno::Any &val, ConnectionSettings *settings );
 
-void bufferEscapeConstant( OUStringBuffer & buf, const OUString & str, ConnectionSettings *settings );
+void bufferEscapeConstant( OUStringBuffer & buf, std::u16string_view str, ConnectionSettings *settings );
 
 OUString sqltype2string(
     const css::uno::Reference< css::beans::XPropertySet > & column );
 
 
 void bufferQuoteQualifiedIdentifier(
-    OUStringBuffer & buf, const OUString &schema, const OUString &name, ConnectionSettings *settings );
+    OUStringBuffer & buf, std::u16string_view schema, std::u16string_view name, ConnectionSettings *settings );
 
 void bufferQuoteQualifiedIdentifier(
     OUStringBuffer & buf,
-    const OUString &schema,
+    std::u16string_view schema,
-    const OUString &name,
+    std::u16string_view name,
-    const OUString &col,
+    std::u16string_view col,
     ConnectionSettings *settings );
 
-void bufferQuoteIdentifier( OUStringBuffer & buf, const OUString &toQuote, ConnectionSettings *settings );
+void bufferQuoteIdentifier( OUStringBuffer & buf, std::u16string_view toQuote, ConnectionSettings *settings );
 void bufferKey2TableConstraint(
     OUStringBuffer &buf,
     const css::uno::Reference< css::beans::XPropertySet > &key,
@@ -115,7 +115,7 @@ OUString array2String( const css::uno::Sequence< css::uno::Any > &seq );
 css::uno::Reference< css::sdbc::XConnection > extractConnectionFromStatement(
     const css::uno::Reference< css::uno::XInterface > & stmt );
 
-void splitConcatenatedIdentifier( const OUString & source, OUString *first, OUString *second);
+void splitConcatenatedIdentifier( std::u16string_view source, OUString *first, OUString *second);
 
 
 void fillAttnum2attnameMap(

connectivity/source/drivers/postgresql/pq_xcolumns.cxx

@@ -328,8 +328,8 @@ void Columns::refresh()
 
 
 void alterColumnByDescriptor(
-    const OUString & schemaName,
+    std::u16string_view schemaName,
-    const OUString & tableName,
+    std::u16string_view tableName,
     ConnectionSettings *settings,
     const Reference< XStatement > &stmt,
     const css::uno::Reference< css::beans::XPropertySet > & past,

connectivity/source/drivers/postgresql/pq_xcolumns.hxx

@@ -37,6 +37,10 @@
 #ifndef INCLUDED_CONNECTIVITY_SOURCE_DRIVERS_POSTGRESQL_PQ_XCOLUMNS_HXX
 #define INCLUDED_CONNECTIVITY_SOURCE_DRIVERS_POSTGRESQL_PQ_XCOLUMNS_HXX
 
+#include <sal/config.h>
+
+#include <string_view>
+
 #include "pq_xcontainer.hxx"
 #include "pq_xbase.hxx"
 
@@ -46,8 +50,8 @@ namespace pq_sdbc_driver
 {
 
 void alterColumnByDescriptor(
-    const OUString & schemaName,
+    std::u16string_view schemaName,
-    const OUString & tableName,
+    std::u16string_view tableName,
     ConnectionSettings *settings,
     const css::uno::Reference< css::sdbc::XStatement > &stmt,
     const css::uno::Reference< css::beans::XPropertySet > & past,

connectivity/source/inc/java/lang/Class.hxx

@@ -21,6 +21,10 @@
 
 //************ Class: java.lang.Class
 
+#include <sal/config.h>
+
+#include <string_view>
+
 #include <java/lang/Object.hxx>
 
 namespace connectivity
@@ -36,7 +40,7 @@ namespace connectivity
         // a Constructor, that is needed for when Returning the Object is needed:
         java_lang_Class( JNIEnv * pEnv, jobject myObj ) : java_lang_Object( pEnv, myObj ){}
 
-        static java_lang_Class * forName( const OUString &_par0 );
+        static java_lang_Class * forName( std::u16string_view _par0 );
         // return the jre object
         jobject newInstanceObject();
 

connectivity/source/inc/odbc/ODatabaseMetaDataResultSet.hxx

@@ -39,6 +39,7 @@
 #include <odbc/ODatabaseMetaData.hxx>
 #include <odbc/odbcbasedllapi.hxx>
 #include <memory>
+#include <string_view>
 
 namespace connectivity::odbc
     {
@@ -199,31 +200,31 @@ namespace connectivity::odbc
             /// @throws css::sdbc::SQLException
             /// @throws css::uno::RuntimeException
             void openTables(const css::uno::Any& catalog, const OUString& schemaPattern,
-                                            const OUString& tableNamePattern, const css::uno::Sequence< OUString >& types );
+                                            std::u16string_view tableNamePattern, const css::uno::Sequence< OUString >& types );
             /// @throws css::sdbc::SQLException
             /// @throws css::uno::RuntimeException
             void openColumnPrivileges(      const css::uno::Any& catalog,    const OUString& schema,
-                                                                    const OUString& table,   const OUString& columnNamePattern );
+                                                                    std::u16string_view table,   std::u16string_view columnNamePattern );
             /// @throws css::sdbc::SQLException
             /// @throws css::uno::RuntimeException
             void openColumns(       const css::uno::Any& catalog,                            const OUString& schemaPattern,
-                                                    const OUString& tableNamePattern,        const OUString& columnNamePattern );
+                                                    std::u16string_view tableNamePattern,        std::u16string_view columnNamePattern );
             /// @throws css::sdbc::SQLException
             /// @throws css::uno::RuntimeException
             void openProcedureColumns(      const css::uno::Any& catalog,            const OUString& schemaPattern,
-                                                            const OUString& procedureNamePattern,const OUString& columnNamePattern );
+                                                            std::u16string_view procedureNamePattern,std::u16string_view columnNamePattern );
             /// @throws css::sdbc::SQLException
             /// @throws css::uno::RuntimeException
             void openProcedures(    const css::uno::Any& catalog,            const OUString& schemaPattern,
-                                                            const OUString& procedureNamePattern);
+                                                            std::u16string_view procedureNamePattern);
             /// @throws css::sdbc::SQLException
             /// @throws css::uno::RuntimeException
             void openVersionColumns(const css::uno::Any& catalog, const OUString& schema,
-                                                            const OUString& table);
+                                                            std::u16string_view table);
             /// @throws css::sdbc::SQLException
             /// @throws css::uno::RuntimeException
             void openBestRowIdentifier( const css::uno::Any& catalog, const OUString& schema,
-                                                                    const OUString& table,sal_Int32 scope, bool nullable );
+                                                                    std::u16string_view table,sal_Int32 scope, bool nullable );
             /// @throws css::sdbc::SQLException
             /// @throws css::uno::RuntimeException
             void openForeignKeys( const css::uno::Any& catalog, const OUString* schema,const OUString* table,
@@ -236,19 +237,19 @@ namespace connectivity::odbc
             void openImportedKeys(const css::uno::Any& catalog, const OUString& schema,const OUString& table);
             /// @throws css::sdbc::SQLException
             /// @throws css::uno::RuntimeException
-            void openPrimaryKeys(const css::uno::Any& catalog, const OUString& schema,const OUString& table);
+            void openPrimaryKeys(const css::uno::Any& catalog, const OUString& schema,std::u16string_view table);
             /// @throws css::sdbc::SQLException
             /// @throws css::uno::RuntimeException
             void openTablePrivileges(const css::uno::Any& catalog, const OUString& schemaPattern,
-                                                              const OUString& tableNamePattern);
+                                                              std::u16string_view tableNamePattern);
             /// @throws css::sdbc::SQLException
             /// @throws css::uno::RuntimeException
             void openSpecialColumns(bool _bRowVer,const css::uno::Any& catalog, const OUString& schema,
-                                                                    const OUString& table,sal_Int32 scope,   bool nullable );
+                                                                    std::u16string_view table,sal_Int32 scope,   bool nullable );
             /// @throws css::sdbc::SQLException
             /// @throws css::uno::RuntimeException
             void openIndexInfo( const css::uno::Any& catalog, const OUString& schema,
-                                                    const OUString& table,bool unique,bool approximate );
+                                                    std::u16string_view table,bool unique,bool approximate );
 
         protected:
             using OPropertySetHelper::getFastPropertyValue;

connectivity/source/inc/odbc/OStatement.hxx

@@ -35,6 +35,7 @@
 #include <odbc/OFunctions.hxx>
 #include <odbc/OConnection.hxx>
 #include <odbc/odbcbasedllapi.hxx>
+#include <string_view>
 #include <vector>
 #include <com/sun/star/lang/XServiceInfo.hpp>
 
@@ -91,7 +92,7 @@ namespace connectivity::odbc
             void setMaxRows(sal_Int64 _par0)                ;
             void setFetchDirection(sal_Int32 _par0)         ;
             void setFetchSize(sal_Int32 _par0)              ;
-            void setCursorName(const OUString &_par0);
+            void setCursorName(std::u16string_view _par0);
             void setEscapeProcessing( const bool _bEscapeProc );
             template < typename T, SQLINTEGER BufferLength > SQLRETURN setStmtOption (SQLINTEGER fOption, T value) const;
 

connectivity/source/parse/internalnode.cxx

@@ -33,7 +33,7 @@ OSQLInternalNode::OSQLInternalNode(const char* pNewValue,
 }
 
 
-OSQLInternalNode::OSQLInternalNode(const OString &NewValue,
+OSQLInternalNode::OSQLInternalNode(std::string_view NewValue,
                                  SQLNodeType eNodeType,
                                  sal_uInt32 nNodeID)
                 :OSQLParseNode(NewValue,eNodeType,nNodeID)

connectivity/source/parse/sqlnode.cxx

@@ -1599,7 +1599,7 @@ OSQLParseNode::OSQLParseNode(const char * pNewValue,
     OSL_ENSURE(m_eNodeType >= SQLNodeType::Rule && m_eNodeType <= SQLNodeType::Concat,"OSQLParseNode: created with invalid NodeType");
 }
 
-OSQLParseNode::OSQLParseNode(const OString &_rNewValue,
+OSQLParseNode::OSQLParseNode(std::string_view _rNewValue,
                              SQLNodeType eNewNodeType,
                              sal_uInt32 nNewNodeID)
         :m_pParent(nullptr)
@@ -2508,7 +2508,7 @@ void OSQLParseNode::parseLeaf(OUStringBuffer& rString, const SQLParseNodeParamet
 }
 
 
-sal_Int32 OSQLParser::getFunctionReturnType(const OUString& _sFunctionName, const IParseContext* pContext)
+sal_Int32 OSQLParser::getFunctionReturnType(std::u16string_view _sFunctionName, const IParseContext* pContext)
 {
     sal_Int32 nType = DataType::VARCHAR;
     OString sFunctionName(OUStringToOString(_sFunctionName,RTL_TEXTENCODING_UTF8));

cppu/source/LogBridge/LogBridge.cxx

@@ -199,7 +199,8 @@ static void LogProbe(
 {
     OString sTemp;
     if ( pMemberType && pMemberType->pTypeName )
-        sTemp = OUStringToOString(pMemberType->pTypeName,RTL_TEXTENCODING_ASCII_US);
+        sTemp = OUStringToOString(
+            OUString::unacquired(&pMemberType->pTypeName),RTL_TEXTENCODING_ASCII_US);
     if ( pre  )
     {
         SAL_INFO("cppu.log", "{ LogBridge () " << sTemp );

cppu/source/typelib/typelib.cxx

@@ -279,7 +279,7 @@ TypeDescriptor_Init_Impl::~TypeDescriptor_Init_Impl()
             typelib_TypeDescriptionReference * pTDR = rEntry.second;
             if (pTDR)
             {
-                OString aTypeName( OUStringToOString( pTDR->pTypeName, RTL_TEXTENCODING_ASCII_US ) );
+                OString aTypeName( OUStringToOString( OUString::unacquired(&pTDR->pTypeName), RTL_TEXTENCODING_ASCII_US ) );
                 SAL_INFO("cppu.typelib", "remaining type: " << aTypeName << "; ref count = " << pTDR->nRefCount);
             }
             else

cppu/source/uno/lbenv.cxx

@@ -41,6 +41,7 @@
 #include "prim.hxx"
 #include "loadmodule.hxx"
 
+#include <string_view>
 #include <unordered_map>
 #include <vector>
 #include <stdio.h>
@@ -672,7 +673,7 @@ void writeLine(
 
 
 void writeLine(
-    void * stream, const OUString & rLine, const char * pFilter )
+    void * stream, std::u16string_view rLine, const char * pFilter )
 {
     OString aLine( OUStringToOString(
                               rLine, RTL_TEXTENCODING_ASCII_US ) );
@@ -777,7 +778,8 @@ extern "C" void SAL_CALL uno_dumpEnvironmentByName(
     else
     {
         writeLine(
-            stream, "environment \"" + OUString::unacquired(&pEnvDcp) + "\" does not exist!",
+            stream,
+            OUString("environment \"" + OUString::unacquired(&pEnvDcp) + "\" does not exist!"),
             pFilter );
     }
 }

cpputools/source/unoexe/unoexe.cxx

@@ -18,6 +18,7 @@
  */
 
 #include <stdio.h>
+#include <string_view>
 
 #include <sal/main.h>
 #include <sal/log.hxx>
@@ -68,7 +69,7 @@ static void out( const char * pText )
         fprintf( stderr, "%s", pText );
 }
 
-static void out( const OUString & rText )
+static void out( std::u16string_view rText )
 {
     if (! s_quiet)
     {

cui/source/dialogs/AdditionsDialog.cxx

@@ -7,6 +7,11 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  *
  */
+
+#include <sal/config.h>
+
+#include <string_view>
+
 #include <config_folders.h>
 
 #include <AdditionsDialog.hxx>
@@ -142,50 +147,57 @@ void parseResponse(const std::string& rResponse, std::vector<AdditionInfo>& aAdd
         try
         {
             AdditionInfo aNewAddition = {
-                OStringToOUString(OString(arrayElement.child("id").string_value().get()),
+                OStringToOUString(std::string_view(arrayElement.child("id").string_value().get()),
                                   RTL_TEXTENCODING_UTF8),
-                OStringToOUString(OString(arrayElement.child("name").string_value().get()),
+                OStringToOUString(std::string_view(arrayElement.child("name").string_value().get()),
-                                  RTL_TEXTENCODING_UTF8),
-                OStringToOUString(OString(arrayElement.child("author").string_value().get()),
-                                  RTL_TEXTENCODING_UTF8),
-                OStringToOUString(OString(arrayElement.child("url").string_value().get()),
-                                  RTL_TEXTENCODING_UTF8),
-                OStringToOUString(OString(arrayElement.child("screenshotURL").string_value().get()),
                                   RTL_TEXTENCODING_UTF8),
                 OStringToOUString(
-                    OString(arrayElement.child("extensionIntroduction").string_value().get()),
+                    std::string_view(arrayElement.child("author").string_value().get()),
+                    RTL_TEXTENCODING_UTF8),
+                OStringToOUString(std::string_view(arrayElement.child("url").string_value().get()),
                                   RTL_TEXTENCODING_UTF8),
                 OStringToOUString(
-                    OString(arrayElement.child("extensionDescription").string_value().get()),
+                    std::string_view(arrayElement.child("screenshotURL").string_value().get()),
                     RTL_TEXTENCODING_UTF8),
-                OStringToOUString(OString(arrayElement.child("releases")
+                OStringToOUString(
+                    std::string_view(
+                        arrayElement.child("extensionIntroduction").string_value().get()),
+                    RTL_TEXTENCODING_UTF8),
+                OStringToOUString(
+                    std::string_view(
+                        arrayElement.child("extensionDescription").string_value().get()),
+                    RTL_TEXTENCODING_UTF8),
+                OStringToOUString(std::string_view(arrayElement.child("releases")
                                                        .child(0)
                                                        .child("compatibility")
                                                        .string_value()
                                                        .get()),
                                   RTL_TEXTENCODING_UTF8),
-                OStringToOUString(OString(arrayElement.child("releases")
+                OStringToOUString(std::string_view(arrayElement.child("releases")
                                                        .child(0)
                                                        .child("releaseName")
                                                        .string_value()
                                                        .get()),
                                   RTL_TEXTENCODING_UTF8),
-                OStringToOUString(OString(arrayElement.child("releases")
+                OStringToOUString(std::string_view(arrayElement.child("releases")
                                                        .child(0)
                                                        .child("license")
                                                        .string_value()
                                                        .get()),
                                   RTL_TEXTENCODING_UTF8),
-                OStringToOUString(OString(arrayElement.child("commentNumber").string_value().get()),
+                OStringToOUString(
-                                  RTL_TEXTENCODING_UTF8),
+                    std::string_view(arrayElement.child("commentNumber").string_value().get()),
-                OStringToOUString(OString(arrayElement.child("commentURL").string_value().get()),
-                                  RTL_TEXTENCODING_UTF8),
-                OStringToOUString(OString(arrayElement.child("rating").string_value().get()),
                     RTL_TEXTENCODING_UTF8),
                 OStringToOUString(
-                    OString(arrayElement.child("downloadNumber").string_value().get()),
+                    std::string_view(arrayElement.child("commentURL").string_value().get()),
                     RTL_TEXTENCODING_UTF8),
-                OStringToOUString(OString(arrayElement.child("releases")
+                OStringToOUString(
+                    std::string_view(arrayElement.child("rating").string_value().get()),
+                    RTL_TEXTENCODING_UTF8),
+                OStringToOUString(
+                    std::string_view(arrayElement.child("downloadNumber").string_value().get()),
+                    RTL_TEXTENCODING_UTF8),
+                OStringToOUString(std::string_view(arrayElement.child("releases")
                                                        .child(0)
                                                        .child("downloadURL")
                                                        .string_value()

dbaccess/qa/unit/dbtest_base.cxx

@@ -47,7 +47,9 @@ utl::TempFile DBTestBase::createTempCopy(OUString const & pathname) {
     tmp.EnableKillingFile();
     auto const e = osl::File::copy(url, tmp.GetURL());
     CPPUNIT_ASSERT_EQUAL_MESSAGE(
-        (OUStringToOString("<" + url + "> -> <" + tmp.GetURL() + ">", RTL_TEXTENCODING_UTF8)
+        (OString(
+            "<" + OUStringToOString(url, RTL_TEXTENCODING_UTF8) + "> -> <"
+            + OUStringToOString(tmp.GetURL(), RTL_TEXTENCODING_UTF8) + ">")
          .getStr()),
         osl::FileBase::E_None, e);
     return tmp;

dbaccess/source/core/misc/dsntypes.cxx

@@ -72,7 +72,7 @@ ODsnTypeCollection::~ODsnTypeCollection()
 #endif
 }
 
-OUString ODsnTypeCollection::getTypeDisplayName(const OUString& _sURL) const
+OUString ODsnTypeCollection::getTypeDisplayName(std::u16string_view _sURL) const
 {
     return m_aDriverConfig.getDriverTypeDisplayName(_sURL);
 }
@@ -130,7 +130,7 @@ bool ODsnTypeCollection::hasDriver( const char* _pAsciiPattern ) const
     return !sPrefix.isEmpty();
 }
 
-bool ODsnTypeCollection::isConnectionUrlRequired(const OUString& _sURL) const
+bool ODsnTypeCollection::isConnectionUrlRequired(std::u16string_view _sURL) const
 {
     OUString sRet;
     OUString sOldPattern;
@@ -146,7 +146,7 @@ bool ODsnTypeCollection::isConnectionUrlRequired(const OUString& _sURL) const
     return !sRet.isEmpty() && sRet[sRet.getLength()-1] == '*';
 }
 
-OUString ODsnTypeCollection::getMediaType(const OUString& _sURL) const
+OUString ODsnTypeCollection::getMediaType(std::u16string_view _sURL) const
 {
     const ::comphelper::NamedValueCollection& aFeatures = m_aDriverConfig.getMetaData(_sURL);
     return aFeatures.getOrDefault("MediaType",OUString());
@@ -236,43 +236,43 @@ void ODsnTypeCollection::extractHostNamePort(const OUString& _rDsn,OUString& _sD
     }
 }
 
-OUString ODsnTypeCollection::getJavaDriverClass(const OUString& _sURL) const
+OUString ODsnTypeCollection::getJavaDriverClass(std::u16string_view _sURL) const
 {
     const ::comphelper::NamedValueCollection& aFeatures = m_aDriverConfig.getProperties(_sURL);
     return aFeatures.getOrDefault("JavaDriverClass",OUString());
 }
 
-bool ODsnTypeCollection::isFileSystemBased(const OUString& _sURL) const
+bool ODsnTypeCollection::isFileSystemBased(std::u16string_view _sURL) const
 {
     const ::comphelper::NamedValueCollection& aFeatures = m_aDriverConfig.getMetaData(_sURL);
     return aFeatures.getOrDefault("FileSystemBased",false);
 }
 
-bool ODsnTypeCollection::supportsTableCreation(const OUString& _sURL) const
+bool ODsnTypeCollection::supportsTableCreation(std::u16string_view _sURL) const
 {
     const ::comphelper::NamedValueCollection& aFeatures = m_aDriverConfig.getMetaData(_sURL);
     return aFeatures.getOrDefault("SupportsTableCreation",false);
 }
 
-bool ODsnTypeCollection::supportsColumnDescription(const OUString& _sURL) const
+bool ODsnTypeCollection::supportsColumnDescription(std::u16string_view _sURL) const
 {
     const ::comphelper::NamedValueCollection& aFeatures = m_aDriverConfig.getMetaData(_sURL);
     return aFeatures.getOrDefault("SupportsColumnDescription",false);
 }
 
-bool ODsnTypeCollection::supportsBrowsing(const OUString& _sURL) const
+bool ODsnTypeCollection::supportsBrowsing(std::u16string_view _sURL) const
 {
     const ::comphelper::NamedValueCollection& aFeatures = m_aDriverConfig.getMetaData(_sURL);
     return aFeatures.getOrDefault("SupportsBrowsing",false);
 }
 
-bool ODsnTypeCollection::supportsDBCreation(const OUString& _sURL) const
+bool ODsnTypeCollection::supportsDBCreation(std::u16string_view _sURL) const
 {
     const ::comphelper::NamedValueCollection& aFeatures = m_aDriverConfig.getMetaData(_sURL);
     return aFeatures.getOrDefault("SupportsDBCreation",false);
 }
 
-Sequence<PropertyValue> ODsnTypeCollection::getDefaultDBSettings( const OUString& _sURL ) const
+Sequence<PropertyValue> ODsnTypeCollection::getDefaultDBSettings( std::u16string_view _sURL ) const
 {
     const ::comphelper::NamedValueCollection& aProperties = m_aDriverConfig.getProperties(_sURL);
     return aProperties.getPropertyValues();
@@ -467,7 +467,7 @@ void ODsnTypeCollection::fillPageIds(const OUString& _sURL,std::vector<sal_Int16
     }
 }
 
-OUString ODsnTypeCollection::getType(const OUString& _sURL) const
+OUString ODsnTypeCollection::getType(std::u16string_view _sURL) const
 {
     OUString sOldPattern;
     for (auto const& dsnPrefix : m_aDsnPrefixes)
@@ -481,7 +481,7 @@ OUString ODsnTypeCollection::getType(const OUString& _sURL) const
     return sOldPattern;
 }
 
-sal_Int32 ODsnTypeCollection::getIndexOf(const OUString& _sURL) const
+sal_Int32 ODsnTypeCollection::getIndexOf(std::u16string_view _sURL) const
 {
     sal_Int32 nRet = -1;
     OUString sOldPattern;

dbaccess/source/filter/hsqldb/rowinputbinary.cxx

@@ -17,6 +17,10 @@
  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  */
 
+#include <sal/config.h>
+
+#include <string_view>
+
 #include "rowinputbinary.hxx"
 #include <com/sun/star/sdbc/DataType.hpp>
 #include <com/sun/star/io/WrongFormatException.hpp>
@@ -82,7 +86,8 @@ OUString lcl_double_dabble(const std::vector<sal_uInt8>& bytes)
         digit += '0';
 
     /* Resize and return the resulting string. */
-    return OStringToOUString(OString(scratch.data(), scratch.size()), RTL_TEXTENCODING_UTF8);
+    return OStringToOUString(std::string_view(scratch.data(), scratch.size()),
+                             RTL_TEXTENCODING_UTF8);
 }
 
 OUString lcl_makeStringFromBigint(const std::vector<sal_uInt8>& bytes)

dbaccess/source/filter/hsqldb/utils.cxx

@@ -51,7 +51,7 @@ int getHexValue(sal_Unicode c)
 } // unnamed namespace
 
 //Convert ascii escaped unicode to utf-8
-OUString utils::convertToUTF8(const OString& original)
+OUString utils::convertToUTF8(std::string_view original)
 {
     OUString res = OStringToOUString(original, RTL_TEXTENCODING_UTF8);
     for (sal_Int32 i = 0;;)

dbaccess/source/filter/hsqldb/utils.hxx

@@ -9,11 +9,15 @@
 
 #pragma once
 
+#include <sal/config.h>
+
+#include <string_view>
+
 #include <rtl/ustring.hxx>
 
 namespace dbahsql::utils
 {
-OUString convertToUTF8(const OString& original);
+OUString convertToUTF8(std::string_view original);
 
 OUString getTableNameFromStmt(const OUString& sSql);
 

dbaccess/source/inc/dsntypes.hxx

@@ -22,6 +22,7 @@
 
 #include <sal/config.h>
 
+#include <string_view>
 #include <vector>
 
 #include <dbadllapi.hxx>
@@ -117,7 +118,7 @@ public:
     ~ODsnTypeCollection();
 
     /// get the datasource type display name from a DSN string
-    OUString getTypeDisplayName(const OUString& _sURL) const;
+    OUString getTypeDisplayName(std::u16string_view _sURL) const;
 
     /// on a given string, cut the type prefix and return the result
     OUString cutPrefix(const OUString& _sURL) const;
@@ -129,10 +130,10 @@ public:
     bool    hasDriver( const char* _pAsciiPattern ) const;
 
     /// on a given string, return the Java Driver Class
-    OUString getJavaDriverClass(const OUString& _sURL) const;
+    OUString getJavaDriverClass(std::u16string_view _sURL) const;
 
     /// returns the media type of a file based database
-    OUString getMediaType(const OUString& _sURL) const;
+    OUString getMediaType(std::u16string_view _sURL) const;
 
     /// returns the dsn prefix for a given media type
     OUString getDatasourcePrefixFromMediaType(std::u16string_view _sMediaType, std::u16string_view _sExtension );
@@ -140,21 +141,21 @@ public:
     void extractHostNamePort(const OUString& _rDsn,OUString& _sDatabaseName,OUString& _rHostname,sal_Int32& _nPortNumber) const;
 
     /// check if the given data source allows creation of tables
-    bool supportsTableCreation(const OUString& _sURL) const;
+    bool supportsTableCreation(std::u16string_view _sURL) const;
 
     /// check if the given data source allows to show column description.
-    bool supportsColumnDescription(const OUString& _sURL) const;
+    bool supportsColumnDescription(std::u16string_view _sURL) const;
 
     // check if a Browse button may be shown to insert connection url
-    bool supportsBrowsing(const OUString& _sURL) const;
+    bool supportsBrowsing(std::u16string_view _sURL) const;
 
     // check if a Create New Database button may be shown to insert connection url
-    bool supportsDBCreation(const OUString& _sURL) const;
+    bool supportsDBCreation(std::u16string_view _sURL) const;
 
     /// check if the given data source type is based on the file system - i.e. the URL is a prefix plus a file URL
-    bool isFileSystemBased(const OUString& _sURL) const;
+    bool isFileSystemBased(std::u16string_view _sURL) const;
 
-    bool isConnectionUrlRequired(const OUString& _sURL) const;
+    bool isConnectionUrlRequired(std::u16string_view _sURL) const;
 
     /// checks if the given data source type embeds its data into the database document
     static bool isEmbeddedDatabase( const OUString& _sURL );
@@ -167,7 +168,7 @@ public:
     /** returns default settings for newly created databases of the given type.
     */
     css::uno::Sequence< css::beans::PropertyValue>
-            getDefaultDBSettings( const OUString& _sURL ) const;
+            getDefaultDBSettings( std::u16string_view _sURL ) const;
 
     /// get access to the first element of the types collection
     inline TypeIterator    begin() const;
@@ -178,9 +179,9 @@ public:
 
     DATASOURCE_TYPE determineType(const OUString& _rDsn) const;
 
-    sal_Int32 getIndexOf(const OUString& _sURL) const;
+    sal_Int32 getIndexOf(std::u16string_view _sURL) const;
     sal_Int32 size() const;
-    OUString getType(const OUString& _sURL) const;
+    OUString getType(std::u16string_view _sURL) const;
 };
 
 //- ODsnTypeCollection::TypeIterator

dbaccess/source/ui/dlg/dbwizsetup.cxx

@@ -293,7 +293,7 @@ void ODbTypeWizDialogSetup::activateDatabasePath()
     {
         sal_Int32 nCreateNewDBIndex = m_pCollection->getIndexOf( m_pGeneralPage->GetSelectedType() );
         if ( nCreateNewDBIndex == -1 )
-            nCreateNewDBIndex = m_pCollection->getIndexOf( "sdbc:dbase:" );
+            nCreateNewDBIndex = m_pCollection->getIndexOf( u"sdbc:dbase:" );
         OSL_ENSURE( nCreateNewDBIndex != -1, "ODbTypeWizDialogSetup::activateDatabasePath: the GeneralPage should have prevented this!" );
         activatePath( static_cast< PathId >( nCreateNewDBIndex + 1 ), true );
 

dbaccess/source/ui/dlg/generalpage.cxx

@@ -461,7 +461,7 @@ namespace dbaui
         // If no driver for embedded DBs is installed, and no dBase driver, then hide the "Create new database" option
         sal_Int32 nCreateNewDBIndex = m_pCollection->getIndexOf( dbaccess::ODsnTypeCollection::getEmbeddedDatabase() );
         if ( nCreateNewDBIndex == -1 )
-            nCreateNewDBIndex = m_pCollection->getIndexOf( "sdbc:dbase:" );
+            nCreateNewDBIndex = m_pCollection->getIndexOf( u"sdbc:dbase:" );
         bool bHideCreateNew = ( nCreateNewDBIndex == -1 );
 
         // also, if our application policies tell us to hide the option, do it
@@ -551,7 +551,7 @@ namespace dbaui
         // Sets the default selected database on startup.
         if (m_xRB_CreateDatabase->get_active() )
         {
-            return m_pCollection->getTypeDisplayName( "sdbc:firebird:" );
+            return m_pCollection->getTypeDisplayName( u"sdbc:firebird:" );
         }
 
         return OGeneralPage::getDatasourceName( _rSet );

desktop/inc/dp_misc.h

@@ -19,6 +19,10 @@
 
 #pragma once
 
+#include <sal/config.h>
+
+#include <string_view>
+
 #include <osl/mutex.hxx>
 #include <osl/process.h>
 #include <com/sun/star/uno/XComponentContext.hpp>
@@ -106,13 +110,13 @@ oslProcess raiseProcess( OUString const & appURL,
     as target encoding.
 */
 DESKTOP_DEPLOYMENTMISC_DLLPUBLIC
-void writeConsole(OUString const & sText);
+void writeConsole(std::u16string_view sText);
 
 /** writes the argument to the console using the error stream.
     Otherwise the same as writeConsole.
 */
 DESKTOP_DEPLOYMENTMISC_DLLPUBLIC
-void writeConsoleError(OUString const & sText);
+void writeConsoleError(std::u16string_view sText);
 
 
 /** reads from the console.

desktop/qa/desktop_lib/test_desktop_lib.cxx

@@ -2084,7 +2084,7 @@ void DesktopLOKTest::testGetFontSubset()
         rtl_UriEncodeKeepEscapes,
         RTL_TEXTENCODING_UTF8
     );
-    OString aCommand = OUStringToOString(".uno:FontSubset&name=" + aFontName, RTL_TEXTENCODING_UTF8);
+    OString aCommand = ".uno:FontSubset&name=" + OUStringToOString(aFontName, RTL_TEXTENCODING_UTF8);
     boost::property_tree::ptree aTree;
     char* pJSON = pDocument->m_pDocumentClass->getCommandValues(pDocument, aCommand.getStr());
     std::stringstream aStream(pJSON);

desktop/source/app/dispatchwatcher.cxx

@@ -61,6 +61,7 @@
 #include <osl/thread.hxx>
 #include <osl/file.hxx>
 #include <iostream>
+#include <string_view>
 
 using namespace ::osl;
 using namespace ::com::sun::star::uno;
@@ -89,7 +90,7 @@ struct DispatchHolder
     Reference< XDispatch > xDispatch;
 };
 
-std::shared_ptr<const SfxFilter> impl_lookupExportFilterForUrl( const OUString& rUrl, const OUString& rFactory )
+std::shared_ptr<const SfxFilter> impl_lookupExportFilterForUrl( std::u16string_view rUrl, const OUString& rFactory )
 {
     // create the list of filters
     OUStringBuffer sQuery(256);

desktop/source/deployment/manager/dp_activepackages.cxx

@@ -21,6 +21,7 @@
 
 #include <sal/config.h>
 
+#include <string_view>
 #include <utility>
 
 #include <osl/diagnose.h>
@@ -44,11 +45,11 @@ namespace {
 
 constexpr const char separator[] = "\xff";
 
-OString oldKey(OUString const & fileName) {
+OString oldKey(std::u16string_view fileName) {
     return OUStringToOString(fileName, RTL_TEXTENCODING_UTF8);
 }
 
-OString newKey(OUString const & id) {
+OString newKey(std::u16string_view id) {
     return separator + OUStringToOString(id, RTL_TEXTENCODING_UTF8);
 }
 

desktop/source/deployment/misc/dp_misc.cxx

@@ -455,19 +455,19 @@ Reference<XInterface> resolveUnoURL(
     return nullptr; // warning C4715
 }
 
-static void writeConsoleWithStream(OUString const & sText, FILE * stream)
+static void writeConsoleWithStream(std::u16string_view sText, FILE * stream)
 {
     OString s = OUStringToOString(sText, osl_getThreadTextEncoding());
     fprintf(stream, "%s", s.getStr());
     fflush(stream);
 }
 
-void writeConsole(OUString const & sText)
+void writeConsole(std::u16string_view sText)
 {
     writeConsoleWithStream(sText, stdout);
 }
 
-void writeConsoleError(OUString const & sText)
+void writeConsoleError(std::u16string_view sText)
 {
     writeConsoleWithStream(sText, stderr);
 }
@@ -479,7 +479,7 @@ OUString readConsole()
     // read one char less so that the last char in buf is always zero
     if (fgets(buf, 1024, stdin) != nullptr)
     {
-        OUString value = OStringToOUString(OString(buf), osl_getThreadTextEncoding());
+        OUString value = OStringToOUString(std::string_view(buf), osl_getThreadTextEncoding());
         return value.trim();
     }
     throw css::uno::RuntimeException("reading from stdin failed");

desktop/source/lib/init.cxx

@@ -31,6 +31,8 @@
 #include <algorithm>
 #include <memory>
 #include <iostream>
+#include <string_view>
+
 #include <boost/property_tree/json_parser.hpp>
 #include <boost/algorithm/string.hpp>
 
@@ -283,7 +285,7 @@ static char *convertOString(const OString &rStr)
     return pMemory;
 }
 
-static char *convertOUString(const OUString &aStr)
+static char *convertOUString(std::u16string_view aStr)
 {
     return convertOString(OUStringToOString(aStr, RTL_TEXTENCODING_UTF8));
 }
@@ -3492,7 +3494,7 @@ static void doc_postWindowExtTextInputEvent(LibreOfficeKitDocument* pThis, unsig
         return;
     }
 
-    SfxLokHelper::postExtTextEventAsync(pWindow, nType, OUString::fromUtf8(OString(pText, strlen(pText))));
+    SfxLokHelper::postExtTextEventAsync(pWindow, nType, OUString::fromUtf8(std::string_view(pText, strlen(pText))));
 }
 
 static void doc_removeTextContext(LibreOfficeKitDocument* pThis, unsigned nLOKWindowId, int nCharBefore, int nCharAfter)
@@ -4584,7 +4586,7 @@ static char* getFonts (const char* pCommand)
     return pJson;
 }
 
-static char* getFontSubset (const OString& aFontName)
+static char* getFontSubset (std::string_view aFontName)
 {
     OUString aFoundFont(::rtl::Uri::decode(OStringToOUString(aFontName, RTL_TEXTENCODING_UTF8), rtl_UriDecodeStrict, RTL_TEXTENCODING_UTF8));
     SfxObjectShell* pDocSh = SfxObjectShell::Current();
@@ -5053,7 +5055,7 @@ static char* doc_getCommandValues(LibreOfficeKitDocument* pThis, const char* pCo
     }
     else if (aCommand.startsWith(aFontSubset))
     {
-        return getFontSubset(OString(pCommand + aFontSubset.getLength()));
+        return getFontSubset(std::string_view(pCommand + aFontSubset.getLength()));
     }
     else
     {

desktop/source/pkgchk/unopkg/unopkg_app.cxx

@@ -70,8 +70,8 @@ struct ExtensionName
 };
 
 
-const char s_usingText [] =
+const char16_t s_usingText [] =
-"\n"
+u"\n"
 "using: " APP_NAME " add <options> extension-path...\n"
 "       " APP_NAME " validate <options> extension-identifier...\n"
 "       " APP_NAME " remove <options> extension-identifier...\n"
@@ -231,7 +231,7 @@ extern "C" int unopkg_main()
             return 0;
         }
         else if (isOption( info_version, &nPos )) {
-            dp_misc::writeConsole("\n" APP_NAME " Version 3.3\n");
+            dp_misc::writeConsole(u"\n" APP_NAME " Version 3.3\n");
             return 0;
         }
         //consume all bootstrap variables which may occur before the sub-command
@@ -271,12 +271,12 @@ extern "C" int unopkg_main()
                     if (cmdArg[ 0 ] == '-')
                     {
                         // is option:
-                        dp_misc::writeConsoleError(
+                        dp_misc::writeConsoleError(OUString(
                                  "\nERROR: unexpected option " +
                                  cmdArg +
                                  "!\n       Use " APP_NAME " " +
                                  toString(info_help) +
-                                 " to print all options.\n");
+                                 " to print all options.\n"));
                         return 1;
                     }
                     else
@@ -478,7 +478,7 @@ extern "C" int unopkg_main()
                       vec_packages.size(), false);
 
                 dp_misc::writeConsole(
-                    "All deployed " + repository + " extensions:\n\n");
+                    OUString("All deployed " + repository + " extensions:\n\n"));
             }
             else
             {
@@ -612,7 +612,7 @@ extern "C" int unopkg_main()
     catch (const LockFileException & e)
     {
         // No logger since it requires UNO which we don't have here
-        dp_misc::writeConsoleError(e.Message + "\n");
+        dp_misc::writeConsoleError(OUString(e.Message + "\n"));
         bShowFailedMsg = false;
     }
     catch (const css::uno::Exception & e ) {

desktop/source/pkgchk/unopkg/unopkg_cmdenv.cxx

@@ -139,9 +139,9 @@ void CommandEnvironmentImpl::printLicense(
 
     OUString sNewLine("\n");
 
-    dp_misc::writeConsole(sNewLine + sNewLine + s1 + sNewLine + sNewLine);
+    dp_misc::writeConsole(OUString(sNewLine + sNewLine + s1 + sNewLine + sNewLine));
-    dp_misc::writeConsole(sLicense + sNewLine + sNewLine);
+    dp_misc::writeConsole(OUString(sLicense + sNewLine + sNewLine));
-    dp_misc::writeConsole(s2 + sNewLine);
+    dp_misc::writeConsole(OUString(s2 + sNewLine));
     dp_misc::writeConsole(s3);
 
     //the user may enter "yes" or "no", we compare in a case insensitive way
@@ -168,7 +168,7 @@ void CommandEnvironmentImpl::printLicense(
         }
         else
         {
-            dp_misc::writeConsole(sNewLine + sNewLine + s4 + sNewLine);
+            dp_misc::writeConsole(OUString(sNewLine + sNewLine + s4 + sNewLine));
         }
     }
     while(true);
@@ -254,7 +254,7 @@ void CommandEnvironmentImpl::handle(
     {
         OUString sMsg(DpResId(RID_STR_UNSUPPORTED_PLATFORM));
         sMsg = sMsg.replaceAll("%Name", platExc.package->getDisplayName());
-        dp_misc::writeConsole("\n" + sMsg + "\n\n");
+        dp_misc::writeConsole(OUString("\n" + sMsg + "\n\n"));
         approve = true;
     }
     else {
@@ -272,7 +272,7 @@ void CommandEnvironmentImpl::handle(
     if (abort && m_option_verbose)
     {
         OUString msg = ::comphelper::anyToString(request);
-        dp_misc::writeConsoleError("\nERROR: " + msg + "\n");
+        dp_misc::writeConsoleError(OUString("\nERROR: " + msg + "\n"));
     }
 
     // select:
@@ -339,15 +339,15 @@ void CommandEnvironmentImpl::update_( Any const & Status )
     for ( sal_Int32 n = 0; n < m_logLevel; ++n )
     {
         if (bUseErr)
-            dp_misc::writeConsoleError(" ");
+            dp_misc::writeConsoleError(u" ");
         else
-            dp_misc::writeConsole(" ");
+            dp_misc::writeConsole(u" ");
     }
 
     if (bUseErr)
-        dp_misc::writeConsoleError(msg + "\n");
+        dp_misc::writeConsoleError(OUString(msg + "\n"));
     else
-        dp_misc::writeConsole(msg + "\n");
+        dp_misc::writeConsole(OUString(msg + "\n"));
 }
 
 

desktop/source/pkgchk/unopkg/unopkg_misc.cxx

@@ -227,7 +227,7 @@ namespace {
 void printf_space( sal_Int32 space )
 {
     while (space--)
-        dp_misc::writeConsole("  ");
+        dp_misc::writeConsole(u"  ");
 }
 
 
@@ -235,7 +235,7 @@ void printf_line(
     OUString const & name, OUString const & value, sal_Int32 level )
 {
     printf_space( level );
-    dp_misc::writeConsole(name + ": " + value + "\n");
+    dp_misc::writeConsole(OUString(name + ": " + value + "\n"));
 }
 
 
@@ -282,13 +282,13 @@ void printf_package(
     Sequence< Reference<deployment::XPackage> > seq(
         xPackage->getBundle( Reference<task::XAbortChannel>(), xCmdEnv ) );
     printf_space( level + 1 );
-    dp_misc::writeConsole("bundled Packages: {\n");
+    dp_misc::writeConsole(u"bundled Packages: {\n");
     std::vector<Reference<deployment::XPackage> >vec_bundle;
     ::comphelper::sequenceToContainer(vec_bundle, seq);
     printf_packages( vec_bundle, std::vector<bool>(vec_bundle.size()),
                      xCmdEnv, level + 2 );
     printf_space( level + 1 );
-    dp_misc::writeConsole("}\n");
+    dp_misc::writeConsole(u"}\n");
 }
 
 } // anon namespace
@@ -300,7 +300,7 @@ static void printf_unaccepted_licenses(
             dp_misc::getIdentifier(ext) );
         printf_line( "Identifier", id, 0 );
         printf_space(1);
-        dp_misc::writeConsole("License not accepted\n\n");
+        dp_misc::writeConsole(u"License not accepted\n\n");
 }
 
 
@@ -314,7 +314,7 @@ void printf_packages(
     if (allExtensions.empty())
     {
         printf_space( level );
-        dp_misc::writeConsole("<none>\n");
+        dp_misc::writeConsole(u"<none>\n");
     }
     else
     {
@@ -325,7 +325,7 @@ void printf_packages(
                 printf_unaccepted_licenses(extension);
             else
                 printf_package( extension, xCmdEnv, level );
-            dp_misc::writeConsole("\n");
+            dp_misc::writeConsole(u"\n");
             ++index;
         }
     }
@@ -365,16 +365,16 @@ Reference<XComponentContext> connectToOffice(
 
     if (verbose)
     {
-        dp_misc::writeConsole(
+        dp_misc::writeConsole(OUString(
             "Raising process: " + appURL +
             "\nArguments: --nologo --nodefault " + args[2] +
-            "\n");
+            "\n"));
     }
 
     ::dp_misc::raiseProcess( appURL, args );
 
     if (verbose)
-        dp_misc::writeConsole("OK.  Connecting...");
+        dp_misc::writeConsole(u"OK.  Connecting...");
 
     OUString sUnoUrl = "uno:pipe,name=" + pipeId + ";urp;StarOffice.ComponentContext";
     Reference<XComponentContext> xRet(
@@ -382,7 +382,7 @@ Reference<XComponentContext> connectToOffice(
             sUnoUrl, xLocalComponentContext ),
         UNO_QUERY_THROW );
     if (verbose)
-        dp_misc::writeConsole("OK.\n");
+        dp_misc::writeConsole(u"OK.\n");
 
     return xRet;
 }

drawinglayer/source/dumper/EnhancedShapeDumper.cxx

@@ -429,7 +429,7 @@ void EnhancedShapeDumper::dumpEnhancedCustomShapeGeometryService(const uno::Refe
             dumpHandlesAsElement(aHandles);
     }
 }
-void EnhancedShapeDumper::dumpTypeAsAttribute(const OUString& sType)
+void EnhancedShapeDumper::dumpTypeAsAttribute(std::u16string_view sType)
 {
     xmlTextWriterWriteFormatAttribute(xmlWriter, BAD_CAST("type"), "%s",
         OUStringToOString(sType, RTL_TEXTENCODING_UTF8).getStr());

drawinglayer/source/dumper/EnhancedShapeDumper.hxx

@@ -8,6 +8,10 @@
  */
 #pragma once
 
+#include <sal/config.h>
+
+#include <string_view>
+
 #include <libxml/xmlwriter.h>
 
 #include <com/sun/star/beans/XPropertySet.hpp>
@@ -73,7 +77,7 @@ public:
 
     // EnhancedCustomShapeGeometry.idl
     void dumpEnhancedCustomShapeGeometryService(const css::uno::Reference< css::beans::XPropertySet >& xPropSet);
-    void dumpTypeAsAttribute(const OUString& sType);
+    void dumpTypeAsAttribute(std::u16string_view sType);
     void dumpViewBoxAsElement(css::awt::Rectangle aViewBox);
     void dumpMirroredXAsAttribute(bool bMirroredX); // also used in EnhancedCustomShapeHandle
     void dumpMirroredYAsAttribute(bool bMirroredY); // also used in EnhancedCustomShapeHandle

drawinglayer/source/dumper/XShapeDumper.cxx

@@ -42,6 +42,7 @@
 #include <rtl/strbuf.hxx>
 #include <libxml/xmlwriter.h>
 #include <iostream>
+#include <string_view>
 #include <rtl/ustring.hxx>
 
 #define DEBUG_DUMPER 0
@@ -62,9 +63,9 @@ void dumpPropertyValueAsElement(const beans::PropertyValue& rPropertyValue, xmlT
 void dumpFillStyleAsAttribute(css::drawing::FillStyle eFillStyle, xmlTextWriterPtr xmlWriter);
 void dumpFillColorAsAttribute(sal_Int32 aColor, xmlTextWriterPtr xmlWriter);
 void dumpFillTransparenceAsAttribute(sal_Int32 aTransparence, xmlTextWriterPtr xmlWriter);
-void dumpFillTransparenceGradientNameAsAttribute(const OUString& sTranspGradName, xmlTextWriterPtr xmlWriter);
+void dumpFillTransparenceGradientNameAsAttribute(std::u16string_view sTranspGradName, xmlTextWriterPtr xmlWriter);
 void dumpFillTransparenceGradientAsElement(const css::awt::Gradient& rTranspGrad, xmlTextWriterPtr xmlWriter);
-void dumpFillGradientNameAsAttribute(const OUString& sGradName, xmlTextWriterPtr xmlWriter);
+void dumpFillGradientNameAsAttribute(std::u16string_view sGradName, xmlTextWriterPtr xmlWriter);
 void dumpFillGradientAsElement(const css::awt::Gradient& rGradient, xmlTextWriterPtr xmlWriter);
 void dumpFillHatchAsElement(const css::drawing::Hatch& rHatch, xmlTextWriterPtr xmlWriter);
 void dumpFillBackgroundAsAttribute(bool bBackground, xmlTextWriterPtr xmlWriter);
@@ -84,13 +85,13 @@ void dumpFillBitmapTileAsAttribute(bool bBitmapTile, xmlTextWriterPtr xmlWriter)
 // LineProperties.idl
 void dumpLineStyleAsAttribute(css::drawing::LineStyle eLineStyle, xmlTextWriterPtr xmlWriter);
 void dumpLineDashAsElement(const css::drawing::LineDash& rLineDash, xmlTextWriterPtr xmlWriter);
-void dumpLineDashNameAsAttribute(const OUString& sLineDashName, xmlTextWriterPtr xmlWriter);
+void dumpLineDashNameAsAttribute(std::u16string_view sLineDashName, xmlTextWriterPtr xmlWriter);
 void dumpLineColorAsAttribute(sal_Int32 aLineColor, xmlTextWriterPtr xmlWriter);
 void dumpLineTransparenceAsAttribute(sal_Int32 aLineTransparence, xmlTextWriterPtr xmlWriter);
 void dumpLineWidthAsAttribute(sal_Int32 aLineWidth, xmlTextWriterPtr xmlWriter);
 void dumpLineJointAsAttribute(css::drawing::LineJoint eLineJoint, xmlTextWriterPtr xmlWriter);
-void dumpLineStartNameAsAttribute(const OUString& sLineStartName, xmlTextWriterPtr xmlWriter);
+void dumpLineStartNameAsAttribute(std::u16string_view sLineStartName, xmlTextWriterPtr xmlWriter);
-void dumpLineEndNameAsAttribute(const OUString& sLineEndName, xmlTextWriterPtr xmlWriter);
+void dumpLineEndNameAsAttribute(std::u16string_view sLineEndName, xmlTextWriterPtr xmlWriter);
 void dumpLineStartAsElement(const css::drawing::PolyPolygonBezierCoords& rLineStart, xmlTextWriterPtr xmlWriter);
 void dumpLineEndAsElement(const css::drawing::PolyPolygonBezierCoords& rLineEnd, xmlTextWriterPtr xmlWriter);
 void dumpLineStartCenterAsAttribute(bool bLineStartCenter, xmlTextWriterPtr xmlWriter);
@@ -142,23 +143,24 @@ void dumpShadowYDistanceAsAttribute(sal_Int32 aShadowYDistance, xmlTextWriterPtr
 //Shape.idl
 void dumpZOrderAsAttribute(sal_Int32 aZOrder, xmlTextWriterPtr xmlWriter);
 void dumpLayerIDAsAttribute(sal_Int32 aLayerID, xmlTextWriterPtr xmlWriter);
-void dumpLayerNameAsAttribute(const OUString& sLayerName, xmlTextWriterPtr xmlWriter);
+void dumpLayerNameAsAttribute(std::u16string_view sLayerName, xmlTextWriterPtr xmlWriter);
 void dumpVisibleAsAttribute(bool bVisible, xmlTextWriterPtr xmlWriter);
 void dumpPrintableAsAttribute(bool bPrintable, xmlTextWriterPtr xmlWriter);
 void dumpMoveProtectAsAttribute(bool bMoveProtect, xmlTextWriterPtr xmlWriter);
-void dumpNameAsAttribute(const OUString& sName, xmlTextWriterPtr xmlWriter);
+void dumpNameAsAttribute(std::u16string_view sName, xmlTextWriterPtr xmlWriter);
 void dumpSizeProtectAsAttribute(bool bSizeProtect, xmlTextWriterPtr xmlWriter);
 void dumpHomogenMatrixLine3(const css::drawing::HomogenMatrixLine3& rLine, xmlTextWriterPtr xmlWriter);
 void dumpTransformationAsElement(const css::drawing::HomogenMatrix3& rTransformation, xmlTextWriterPtr xmlWriter);
 void dumpNavigationOrderAsAttribute(sal_Int32 aNavigationOrder, xmlTextWriterPtr xmlWriter);
-void dumpHyperlinkAsAttribute(const OUString& sHyperlink, xmlTextWriterPtr xmlWriter);
+void dumpHyperlinkAsAttribute(std::u16string_view sHyperlink, xmlTextWriterPtr xmlWriter);
 void dumpInteropGrabBagAsElement(const uno::Sequence< beans::PropertyValue>& aInteropGrabBag, xmlTextWriterPtr xmlWriter);
 
 // CustomShape.idl
-void dumpCustomShapeEngineAsAttribute(const OUString& sCustomShapeEngine, xmlTextWriterPtr xmlWriter);
+void dumpCustomShapeEngineAsAttribute(std::u16string_view sCustomShapeEngine, xmlTextWriterPtr xmlWriter);
-void dumpCustomShapeDataAsAttribute(const OUString& sCustomShapeData, xmlTextWriterPtr xmlWriter);
+void dumpCustomShapeDataAsAttribute(
+    std::u16string_view sCustomShapeData, xmlTextWriterPtr xmlWriter);
 void dumpCustomShapeGeometryAsElement(const css::uno::Sequence< css::beans::PropertyValue>& aCustomShapeGeometry, xmlTextWriterPtr xmlWriter);
-void dumpCustomShapeReplacementURLAsAttribute(const OUString& sCustomShapeReplacementURL, xmlTextWriterPtr xmlWriter);
+void dumpCustomShapeReplacementURLAsAttribute(std::u16string_view sCustomShapeReplacementURL, xmlTextWriterPtr xmlWriter);
 
 // XShape.idl
 void dumpPositionAsAttribute(const css::awt::Point& rPoint, xmlTextWriterPtr xmlWriter);
@@ -229,7 +231,7 @@ void dumpFillTransparenceAsAttribute(sal_Int32 aTransparence, xmlTextWriterPtr x
     xmlTextWriterWriteFormatAttribute(xmlWriter, BAD_CAST("fillTransparence"), "%" SAL_PRIdINT32, aTransparence);
 }
 
-void dumpFillTransparenceGradientNameAsAttribute(const OUString& sTranspGradName, xmlTextWriterPtr xmlWriter)
+void dumpFillTransparenceGradientNameAsAttribute(std::u16string_view sTranspGradName, xmlTextWriterPtr xmlWriter)
 {
     xmlTextWriterWriteFormatAttribute(xmlWriter, BAD_CAST("fillTransparenceGradientName"), "%s",
         OUStringToOString(sTranspGradName, RTL_TEXTENCODING_UTF8).getStr());
@@ -279,7 +281,7 @@ void dumpFillTransparenceGradientAsElement(const awt::Gradient& rTranspGrad, xml
     xmlTextWriterEndElement( xmlWriter );
 }
 
-void dumpFillGradientNameAsAttribute(const OUString& sGradName, xmlTextWriterPtr xmlWriter)
+void dumpFillGradientNameAsAttribute(std::u16string_view sGradName, xmlTextWriterPtr xmlWriter)
 {
     xmlTextWriterWriteFormatAttribute(xmlWriter, BAD_CAST("fillGradientName"), "%s",
         OUStringToOString(sGradName, RTL_TEXTENCODING_UTF8).getStr());
@@ -493,7 +495,7 @@ void dumpLineDashAsElement(const drawing::LineDash& rLineDash, xmlTextWriterPtr
     xmlTextWriterEndElement( xmlWriter );
 }
 
-void dumpLineDashNameAsAttribute(const OUString& sLineDashName, xmlTextWriterPtr xmlWriter)
+void dumpLineDashNameAsAttribute(std::u16string_view sLineDashName, xmlTextWriterPtr xmlWriter)
 {
     xmlTextWriterWriteFormatAttribute(xmlWriter, BAD_CAST("lineDashName"), "%s",
         OUStringToOString(sLineDashName, RTL_TEXTENCODING_UTF8).getStr());
@@ -538,13 +540,13 @@ void dumpLineJointAsAttribute(drawing::LineJoint eLineJoint, xmlTextWriterPtr xm
     }
 }
 
-void dumpLineStartNameAsAttribute(const OUString& sLineStartName, xmlTextWriterPtr xmlWriter)
+void dumpLineStartNameAsAttribute(std::u16string_view sLineStartName, xmlTextWriterPtr xmlWriter)
 {
     xmlTextWriterWriteFormatAttribute(xmlWriter, BAD_CAST("lineStartName"), "%s",
     OUStringToOString(sLineStartName, RTL_TEXTENCODING_UTF8).getStr());
 }
 
-void dumpLineEndNameAsAttribute(const OUString& sLineEndName, xmlTextWriterPtr xmlWriter)
+void dumpLineEndNameAsAttribute(std::u16string_view sLineEndName, xmlTextWriterPtr xmlWriter)
 {
     xmlTextWriterWriteFormatAttribute(xmlWriter, BAD_CAST("lineEndName"), "%s",
     OUStringToOString(sLineEndName, RTL_TEXTENCODING_UTF8).getStr());
@@ -989,7 +991,7 @@ void dumpLayerIDAsAttribute(sal_Int32 aLayerID, xmlTextWriterPtr xmlWriter)
     xmlTextWriterWriteFormatAttribute(xmlWriter, BAD_CAST("layerID"), "%" SAL_PRIdINT32, aLayerID);
 }
 
-void dumpLayerNameAsAttribute(const OUString& sLayerName, xmlTextWriterPtr xmlWriter)
+void dumpLayerNameAsAttribute(std::u16string_view sLayerName, xmlTextWriterPtr xmlWriter)
 {
     xmlTextWriterWriteFormatAttribute(xmlWriter, BAD_CAST("layerName"), "%s",
         OUStringToOString(sLayerName, RTL_TEXTENCODING_UTF8).getStr());
@@ -1019,9 +1021,9 @@ void dumpMoveProtectAsAttribute(bool bMoveProtect, xmlTextWriterPtr xmlWriter)
         xmlTextWriterWriteFormatAttribute( xmlWriter, BAD_CAST("moveProtect"), "%s", "false");
 }
 
-void dumpNameAsAttribute(const OUString& sName, xmlTextWriterPtr xmlWriter)
+void dumpNameAsAttribute(std::u16string_view sName, xmlTextWriterPtr xmlWriter)
 {
-    if(!sName.isEmpty() && !m_bNameDumped)
+    if(!sName.empty() && !m_bNameDumped)
     {
         xmlTextWriterWriteFormatAttribute(xmlWriter, BAD_CAST("name"), "%s", OUStringToOString(sName, RTL_TEXTENCODING_UTF8).getStr());
         m_bNameDumped = true;
@@ -1065,7 +1067,7 @@ void dumpNavigationOrderAsAttribute(sal_Int32 aNavigationOrder, xmlTextWriterPtr
     xmlTextWriterWriteFormatAttribute(xmlWriter, BAD_CAST("navigationOrder"), "%" SAL_PRIdINT32, aNavigationOrder);
 }
 
-void dumpHyperlinkAsAttribute(const OUString& sHyperlink, xmlTextWriterPtr xmlWriter)
+void dumpHyperlinkAsAttribute(std::u16string_view sHyperlink, xmlTextWriterPtr xmlWriter)
 {
     xmlTextWriterWriteFormatAttribute(xmlWriter, BAD_CAST("hyperlink"), "%s",
         OUStringToOString(sHyperlink, RTL_TEXTENCODING_UTF8).getStr());
@@ -1108,13 +1110,14 @@ void dumpShapeDescriptorAsAttribute( const uno::Reference< drawing::XShapeDescri
 // ---------- CustomShape.idl ----------
 
 
-void dumpCustomShapeEngineAsAttribute(const OUString& sCustomShapeEngine, xmlTextWriterPtr xmlWriter)
+void dumpCustomShapeEngineAsAttribute(std::u16string_view sCustomShapeEngine, xmlTextWriterPtr xmlWriter)
 {
     xmlTextWriterWriteFormatAttribute(xmlWriter, BAD_CAST("customShapeEngine"), "%s",
         OUStringToOString(sCustomShapeEngine, RTL_TEXTENCODING_UTF8).getStr());
 }
 
-void dumpCustomShapeDataAsAttribute(const OUString& sCustomShapeData, xmlTextWriterPtr xmlWriter)
+void dumpCustomShapeDataAsAttribute(
+    std::u16string_view sCustomShapeData, xmlTextWriterPtr xmlWriter)
 {
     xmlTextWriterWriteFormatAttribute(xmlWriter, BAD_CAST("customShapeData"), "%s",
         OUStringToOString(sCustomShapeData, RTL_TEXTENCODING_UTF8).getStr());
@@ -1220,7 +1223,7 @@ void dumpCustomShapeGeometryAsElement(const uno::Sequence< beans::PropertyValue>
     xmlTextWriterEndElement( xmlWriter );
 }
 
-void dumpCustomShapeReplacementURLAsAttribute(const OUString& sCustomShapeReplacementURL, xmlTextWriterPtr xmlWriter)
+void dumpCustomShapeReplacementURLAsAttribute(std::u16string_view sCustomShapeReplacementURL, xmlTextWriterPtr xmlWriter)
 {
     xmlTextWriterWriteFormatAttribute(xmlWriter, BAD_CAST("customShapeReplacementURL"), "%s",
         OUStringToOString(sCustomShapeReplacementURL, RTL_TEXTENCODING_UTF8).getStr());

editeng/source/misc/svxacorr.cxx

@@ -1884,7 +1884,7 @@ OUString EncryptBlockName_Imp(const OUString& rName)
 }
 
 /* This code is copied from SwXMLTextBlocks::GeneratePackageName */
-static void GeneratePackageName ( const OUString& rShort, OUString& rPackageName )
+static void GeneratePackageName ( std::u16string_view rShort, OUString& rPackageName )
 {
     OString sByte(OUStringToOString(rShort, RTL_TEXTENCODING_UTF7));
     OUStringBuffer aBuf(OStringToOUString(sByte, RTL_TEXTENCODING_ASCII_US));

extensions/source/bibliography/general.cxx

@@ -423,7 +423,7 @@ void BibGeneralPage::CommitActiveControl()
 }
 
 void BibGeneralPage::AddControlWithError( const OUString& rColumnName, FixedText &rLabel,
-    OUString& rErrorString, const OString& sHelpId, sal_uInt16 nIndexInFTArray, std::vector<vcl::Window*> &rChildren)
+    OUString& rErrorString, std::string_view sHelpId, sal_uInt16 nIndexInFTArray, std::vector<vcl::Window*> &rChildren)
 {
     const OUString aColumnUIName(rLabel.GetText());
     // adds also the XControl and creates a map entry in nFT2CtrlMap[] for mapping between control and FT
@@ -448,7 +448,7 @@ void BibGeneralPage::AddControlWithError( const OUString& rColumnName, FixedText
 
 bool  BibGeneralPage::AddXControl(
         const OUString& rName,
-        FixedText& rLabel, const OString& sHelpId, sal_Int16& rIndex,
+        FixedText& rLabel, std::string_view sHelpId, sal_Int16& rIndex,
         std::vector<vcl::Window*>& rChildren)
 {
     uno::Reference< awt::XControlModel >  xCtrModel;

extensions/source/bibliography/general.hxx

@@ -20,6 +20,10 @@
 #ifndef INCLUDED_EXTENSIONS_SOURCE_BIBLIOGRAPHY_GENERAL_HXX
 #define INCLUDED_EXTENSIONS_SOURCE_BIBLIOGRAPHY_GENERAL_HXX
 
+#include <sal/config.h>
+
+#include <string_view>
+
 #include <com/sun/star/awt/XFocusListener.hpp>
 #include <com/sun/star/awt/XControlContainer.hpp>
 #include <com/sun/star/form/XBoundComponent.hpp>
@@ -124,12 +128,12 @@ class BibGeneralPage : public TabPage
     BibDataManager*     pDatMan;
 
     bool
-                                AddXControl( const OUString& rName, FixedText& rLabel, const OString& sHelpId,
+                                AddXControl( const OUString& rName, FixedText& rLabel, std::string_view sHelpId,
                                             sal_Int16& rIndex, std::vector<vcl::Window*>& rChildren );
 
     void                        AddControlWithError( const OUString& rColumnName, FixedText& rLabel,
                                             OUString& rErrorString,
-                                            const OString& sHelpId, sal_uInt16 nIndexInFTArray, std::vector<vcl::Window*>& rChildren );
+                                            std::string_view sHelpId, sal_uInt16 nIndexInFTArray, std::vector<vcl::Window*>& rChildren );
 
 protected:
     void                        InitFixedTexts();     // create mnemonics and set text an all fixed texts

extensions/source/logging/loghandler.cxx

@@ -109,7 +109,7 @@ namespace logging
     }
 
 
-    bool LogHandlerHelper::setEncoding( const OUString& _rEncoding )
+    bool LogHandlerHelper::setEncoding( std::u16string_view _rEncoding )
     {
         OString sAsciiEncoding( OUStringToOString( _rEncoding, RTL_TEXTENCODING_ASCII_US ) );
         rtl_TextEncoding eEncoding = rtl_getTextEncodingFromMimeCharset( sAsciiEncoding.getStr() );

extensions/source/logging/loghandler.hxx

@@ -20,6 +20,10 @@
 #ifndef INCLUDED_EXTENSIONS_SOURCE_LOGGING_LOGHANDLER_HXX
 #define INCLUDED_EXTENSIONS_SOURCE_LOGGING_LOGHANDLER_HXX
 
+#include <sal/config.h>
+
+#include <string_view>
+
 #include <com/sun/star/logging/XLogFormatter.hpp>
 #include <com/sun/star/uno/XComponentContext.hpp>
 #include <com/sun/star/logging/LogRecord.hpp>
@@ -59,7 +63,7 @@ namespace logging
         void    setIsInitialized() { m_bInitialized = true; }
 
         bool    getEncoding(        OUString& _out_rEncoding ) const;
-        bool    setEncoding( const  OUString& _rEncoding     );
+        bool    setEncoding( std::u16string_view _rEncoding  );
 
         rtl_TextEncoding
                 getTextEncoding() const { return m_eEncoding; }

extensions/source/propctrlr/pcrcommon.cxx

@@ -44,7 +44,7 @@ namespace pcr
     }
 
 
-    OUString HelpIdUrl::getHelpURL( const OString& sHelpId )
+    OUString HelpIdUrl::getHelpURL( std::string_view sHelpId )
     {
         OUStringBuffer aBuffer;
         OUString aTmp( OStringToOUString(sHelpId, RTL_TEXTENCODING_UTF8) );

extensions/source/propctrlr/pcrcommon.hxx

@@ -23,6 +23,10 @@
 #define EDITOR_LIST_APPEND              (SAL_MAX_UINT16)
 #define EDITOR_LIST_ENTRY_NOTFOUND      (SAL_MAX_UINT16)
 
+#include <sal/config.h>
+
+#include <string_view>
+
 #include <com/sun/star/uno/Sequence.hxx>
 #include <com/sun/star/beans/XPropertyChangeListener.hpp>
 #include <com/sun/star/beans/PropertyChangeEvent.hpp>
@@ -66,7 +70,7 @@ namespace pcr
     {
     public:
         static OString getHelpId( const OUString& _rHelpURL );
-        static OUString getHelpURL( const OString& );
+        static OUString getHelpURL( std::string_view );
     };
 
 

extensions/source/scanner/sane.cxx

@@ -414,7 +414,7 @@ void Sane::SetOptionValue( int n, bool bSet )
     ControlOption( n, SANE_ACTION_SET_VALUE, &nRet );
 }
 
-void Sane::SetOptionValue( int n, const OUString& rSet )
+void Sane::SetOptionValue( int n, std::u16string_view rSet )
 {
     if( ! maHandle  ||  mppOptions[n]->type != SANE_TYPE_STRING )
         return;

extensions/source/scanner/sane.hxx

@@ -18,6 +18,10 @@
  */
 #pragma once
 
+#include <sal/config.h>
+
+#include <string_view>
+
 #include <cppuhelper/implbase.hxx>
 #include <osl/thread.h>
 #include <osl/module.h>
@@ -144,7 +148,7 @@ public:
     bool            GetOptionValue( int, double* );
 
     void            SetOptionValue( int, bool );
-    void            SetOptionValue( int, const OUString& );
+    void            SetOptionValue( int, std::u16string_view );
     void            SetOptionValue( int, double, int nElement = 0 );
     void            SetOptionValue( int, double const * );
 

extensions/source/update/check/download.cxx

@@ -17,6 +17,9 @@
  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  */
 
+#include <sal/config.h>
+
+#include <string_view>
 
 #include <curl/curl.h>
 
@@ -70,7 +73,8 @@ static void openFile( OutData& out )
     sal_Int32 nIndex = aURL.lastIndexOf('/');
     if( nIndex > 0 )
     {
-        out.File = out.DestinationDir + OStringToOUString(aURL.copy(nIndex), RTL_TEXTENCODING_UTF8);
+        out.File = out.DestinationDir
+            + OStringToOUString(aURL.subView(nIndex), RTL_TEXTENCODING_UTF8);
 
         oslFileError rc;
 
@@ -206,7 +210,7 @@ Download::getProxyForURL(const OUString& rURL, OString& rHost, sal_Int32& rPort)
 }
 
 
-static bool curl_run(const OUString& rURL, OutData& out, const OString& aProxyHost, sal_Int32 nProxyPort)
+static bool curl_run(std::u16string_view rURL, OutData& out, const OString& aProxyHost, sal_Int32 nProxyPort)
 {
     /* Need to investigate further whether it is necessary to call
      * curl_global_init or not - leave it for now (as the ftp UCB content

filter/source/graphicfilter/idxf/dxfreprd.cxx

@@ -436,7 +436,7 @@ namespace {
     }
 }
 
-OUString DXFRepresentation::ToOUString(const OString& s) const
+OUString DXFRepresentation::ToOUString(std::string_view s) const
 {
     OUString result = OStringToOUString(s, getTextEncoding(),
                                            RTL_TEXTTOUNICODE_FLAGS_UNDEFINED_ERROR

filter/source/graphicfilter/idxf/dxfreprd.hxx

@@ -23,7 +23,7 @@
 #include "dxfblkrd.hxx"
 #include "dxftblrd.hxx"
 #include <array>
-
+#include <string_view>
 
 //--------------------Other stuff---------------------------------------------
 
@@ -100,7 +100,7 @@ public:
 
     rtl_TextEncoding getTextEncoding() const;
     void setTextEncoding(rtl_TextEncoding aEnc) { mEnc = aEnc; }
-    OUString ToOUString(const OString& s) const;
+    OUString ToOUString(std::string_view s) const;
 
     double getGlobalLineTypeScale() const { return mfGlobalLineTypeScale; }
     void setGlobalLineTypeScale(double fGlobalLineTypeScale) { mfGlobalLineTypeScale = fGlobalLineTypeScale; }

filter/source/xsltfilter/LibXSLTTransformer.cxx

@@ -11,6 +11,7 @@
 #include <algorithm>
 #include <cstring>
 #include <map>
+#include <string_view>
 #include <utility>
 #include <vector>
 #include <libxml/parser.h>
@@ -147,7 +148,7 @@ namespace XSLT
             streamName = ensureStringValue(streamName, ctxt);
 
             oh->insertByName(OStringToOUString(reinterpret_cast<char*>(streamName->stringval), RTL_TEXTENCODING_UTF8),
-                             OString(reinterpret_cast<char*>(value->stringval)));
+                             std::string_view(reinterpret_cast<char*>(value->stringval)));
             valuePush(ctxt, xmlXPathNewCString(""));
         }
 

filter/source/xsltfilter/OleHandler.cxx

@@ -57,7 +57,7 @@ namespace XSLT
         }
     }
 
-    void OleHandler::initRootStorageFromBase64(const OString& content)
+    void OleHandler::initRootStorageFromBase64(std::string_view content)
     {
         Sequence<sal_Int8> oleData;
         ::comphelper::Base64::decode(oleData, OStringToOUString(
@@ -132,7 +132,7 @@ namespace XSLT
     }
 
     void
-    OleHandler::insertByName(const OUString& streamName, const OString& content)
+    OleHandler::insertByName(const OUString& streamName, std::string_view content)
     {
         if ( streamName == "oledata.mso" )
         {
@@ -167,7 +167,7 @@ namespace XSLT
     }
 
     void
-    OleHandler::insertSubStorage(const OUString& streamName, const OString& content)
+    OleHandler::insertSubStorage(const OUString& streamName, std::string_view content)
     {
         //decode the base64 string
         Sequence<sal_Int8> oledata;

filter/source/xsltfilter/OleHandler.hxx

@@ -13,6 +13,7 @@
 #include <cstdio>
 #include <cstring>
 #include <map>
+#include <string_view>
 #include <vector>
 #include <iostream>
 #include <libxml/parser.h>
@@ -66,7 +67,7 @@ namespace XSLT
             if (m_tcontext)
                 m_tcontext->_private = nullptr;
         }
-        void    insertByName(const OUString& streamName, const OString& content);
+        void    insertByName(const OUString& streamName, std::string_view content);
         OString getByName(const OUString& streamName);
         void registercontext(xsltTransformContextPtr context)
         {
@@ -83,8 +84,8 @@ namespace XSLT
 
         void    ensureCreateRootStorage();
         OString encodeSubStorage(const OUString& streamName);
-        void    insertSubStorage(const OUString& streamName, const OString& content);
+        void    insertSubStorage(const OUString& streamName, std::string_view content);
-        void    initRootStorageFromBase64(const OString& content);
+        void    initRootStorageFromBase64(std::string_view content);
         css::uno::Reference<XStream> createTempFile();
     };
 }

forms/source/component/DatabaseForm.cxx

@@ -17,6 +17,9 @@
  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  */
 
+#include <sal/config.h>
+
+#include <string_view>
 
 #include <componenttools.hxx>
 #include "DatabaseForm.hxx"
@@ -916,7 +919,7 @@ void ODatabaseForm::Encode( OUString& rString )
 
 
 void ODatabaseForm::InsertTextPart( INetMIMEMessage& rParent, const OUString& rName,
-    const OUString& rData )
+    std::u16string_view rData )
 {
     // Create part as MessageChild
     std::unique_ptr<INetMIMEMessage> pChild(new INetMIMEMessage);
@@ -2075,7 +2078,7 @@ void SAL_CALL ODatabaseForm::submit( const Reference<XControl>& Control,
 }
 
 static void lcl_dispatch(const Reference< XFrame >& xFrame,const Reference<XURLTransformer>& xTransformer,const OUString& aURLStr,const OUString& aReferer,const OUString& aTargetName
-                  ,const OUString& aData,rtl_TextEncoding _eEncoding)
+                  ,std::u16string_view aData,rtl_TextEncoding _eEncoding)
 {
     URL aURL;
     aURL.Complete = aURLStr;

forms/source/component/DatabaseForm.hxx

@@ -21,6 +21,7 @@
 
 #include <sal/config.h>
 
+#include <string_view>
 #include <vector>
 
 #include <propertybaghelper.hxx>
@@ -505,7 +506,7 @@ private:
 
     void FillSuccessfulList(HtmlSuccessfulObjList& rList, const css::uno::Reference< css::awt::XControl>& rxSubmitButton, const css::awt::MouseEvent& MouseEvt);
 
-    static void InsertTextPart(INetMIMEMessage& rParent, const OUString& rName, const OUString& rData);
+    static void InsertTextPart(INetMIMEMessage& rParent, const OUString& rName, std::u16string_view rData);
     static void InsertFilePart(INetMIMEMessage& rParent, const OUString& rName, const OUString& rFileName);
     static void Encode(OUString& rString);
 

forms/source/xforms/submission/serialization_urlencoded.cxx

@@ -69,7 +69,8 @@ bool CSerializationURLEncoded::is_unreserved(char c)
     }
     return false;
 }
-void  CSerializationURLEncoded::encode_and_append(const OUString& aString, OStringBuffer& aBuffer)
+void  CSerializationURLEncoded::encode_and_append(
+    std::u16string_view aString, OStringBuffer& aBuffer)
 {
     OString utf8String = OUStringToOString(aString, RTL_TEXTENCODING_UTF8);
     const sal_uInt8 *pString = reinterpret_cast< const sal_uInt8 * >( utf8String.getStr() );

forms/source/xforms/submission/serialization_urlencoded.hxx

@@ -20,6 +20,10 @@
 #ifndef INCLUDED_FORMS_SOURCE_XFORMS_SUBMISSION_SERIALIZATION_URLENCODED_HXX
 #define INCLUDED_FORMS_SOURCE_XFORMS_SUBMISSION_SERIALIZATION_URLENCODED_HXX
 
+#include <sal/config.h>
+
+#include <string_view>
+
 #include <com/sun/star/io/XPipe.hpp>
 
 #include <rtl/strbuf.hxx>
@@ -32,7 +36,7 @@ private:
     css::uno::Reference<css::io::XPipe> m_aPipe;
 
     static bool is_unreserved(char);
-    static void encode_and_append(const OUString& aString, OStringBuffer& aBuffer);
+    static void encode_and_append(std::u16string_view aString, OStringBuffer& aBuffer);
     void serialize_node(const css::uno::Reference<css::xml::dom::XNode>& aNode);
 
 public:

fpicker/source/office/OfficeControlAccess.cxx

@@ -211,7 +211,7 @@ namespace svt
         return sHelpURL;
     }
 
-    Any OControlAccess::getControlProperty( const OUString& rControlName, const OUString& rControlProperty )
+    Any OControlAccess::getControlProperty( std::u16string_view rControlName, const OUString& rControlProperty )
     {
         // look up the control
         sal_Int16 nControlId = -1;
@@ -232,7 +232,7 @@ namespace svt
         return implGetControlProperty( pControl, aPropDesc->nPropertyId );
     }
 
-    weld::Widget* OControlAccess::implGetControl( const OUString& rControlName, sal_Int16* _pId, PropFlags* _pPropertyMask ) const
+    weld::Widget* OControlAccess::implGetControl( std::u16string_view rControlName, sal_Int16* _pId, PropFlags* _pPropertyMask ) const
     {
         weld::Widget* pControl = nullptr;
         ControlDescription tmpDesc;
@@ -260,7 +260,7 @@ namespace svt
         return pControl;
     }
 
-    void OControlAccess::setControlProperty( const OUString& rControlName, const OUString& rControlProperty, const css::uno::Any& rValue )
+    void OControlAccess::setControlProperty( std::u16string_view rControlName, const OUString& rControlProperty, const css::uno::Any& rValue )
     {
         // look up the control
         sal_Int16 nControlId = -1;
@@ -292,7 +292,7 @@ namespace svt
         return aControls;
     }
 
-    Sequence< OUString > OControlAccess::getSupportedControlProperties( const OUString& rControlName )
+    Sequence< OUString > OControlAccess::getSupportedControlProperties( std::u16string_view rControlName )
     {
         sal_Int16 nControlId = -1;
         PropFlags nPropertyMask = PropFlags::NONE;
@@ -311,7 +311,7 @@ namespace svt
         return aProps;
     }
 
-    bool OControlAccess::isControlSupported( const OUString& rControlName )
+    bool OControlAccess::isControlSupported( std::u16string_view rControlName )
     {
         ControlDescription tmpDesc;
         OString aControlName = OUStringToOString(rControlName, RTL_TEXTENCODING_UTF8);
@@ -319,7 +319,7 @@ namespace svt
         return ::std::binary_search( s_pControls, s_pControlsEnd, tmpDesc, ControlDescriptionLookup() );
     }
 
-    bool OControlAccess::isControlPropertySupported( const OUString& rControlName, const OUString& rControlProperty )
+    bool OControlAccess::isControlPropertySupported( std::u16string_view rControlName, const OUString& rControlProperty )
     {
         // look up the control
         sal_Int16 nControlId = -1;

fpicker/source/office/OfficeControlAccess.hxx

@@ -20,6 +20,10 @@
 #ifndef INCLUDED_FPICKER_SOURCE_OFFICE_OFFICECONTROLACCESS_HXX
 #define INCLUDED_FPICKER_SOURCE_OFFICE_OFFICECONTROLACCESS_HXX
 
+#include <sal/config.h>
+
+#include <string_view>
+
 #include "fileview.hxx"
 #include "pickercallbacks.hxx"
 #include <o3tl/typed_flags_set.hxx>
@@ -66,14 +70,14 @@ namespace svt
         OControlAccess( IFilePickerController* pController, SvtFileView* pFileView );
 
         // XControlAccess implementation
-        void setControlProperty( const OUString& rControlName, const OUString& rControlProperty, const css::uno::Any& rValue );
+        void setControlProperty( std::u16string_view rControlName, const OUString& rControlProperty, const css::uno::Any& rValue );
-        css::uno::Any  getControlProperty( const OUString& rControlName, const OUString& rControlProperty );
+        css::uno::Any  getControlProperty( std::u16string_view rControlName, const OUString& rControlProperty );
 
         // XControlInformation implementation
         css::uno::Sequence< OUString >  getSupportedControls(  ) const;
-        css::uno::Sequence< OUString >  getSupportedControlProperties( const OUString& rControlName );
+        css::uno::Sequence< OUString >  getSupportedControlProperties( std::u16string_view rControlName );
-        static bool                     isControlSupported( const OUString& rControlName );
+        static bool                     isControlSupported( std::u16string_view rControlName );
-        bool                            isControlPropertySupported( const OUString& rControlName, const OUString& rControlProperty );
+        bool                            isControlPropertySupported( std::u16string_view rControlName, const OUString& rControlProperty );
 
         // XFilePickerControlAccess
         void                        setValue( sal_Int16 nId, sal_Int16 nCtrlAction, const css::uno::Any& rValue );
@@ -105,7 +109,7 @@ namespace svt
                                         weld::Widget* pControl, PropFlags nProperty, const css::uno::Any& rValue,
                                         bool bIgnoreIllegalArgument = true );
 
-        weld::Widget* implGetControl( const OUString& rControlName, sal_Int16* pId, PropFlags* pPropertyMask = nullptr ) const;
+        weld::Widget* implGetControl( std::u16string_view rControlName, sal_Int16* pId, PropFlags* pPropertyMask = nullptr ) const;
 
         /** implements the various methods for retrieving properties from controls
 

framework/inc/dispatch/interceptionhelper.hxx

@@ -32,6 +32,7 @@
 #include <cppuhelper/weakref.hxx>
 
 #include <deque>
+#include <string_view>
 
 namespace framework{
 
@@ -103,7 +104,7 @@ class InterceptionHelper final : public  ::cppu::WeakImplHelper<
                 @return An iterator object, which points directly to the located item inside this list.
                         In case no interceptor could be found, it points to the end of this list!
               */
-            iterator findByPattern(const OUString& sURL)
+            iterator findByPattern(std::u16string_view sURL)
             {
                 iterator pIt;
                 for (pIt=begin(); pIt!=end(); ++pIt)

framework/inc/helper/persistentwindowstate.hxx

@@ -20,6 +20,10 @@
 #ifndef INCLUDED_FRAMEWORK_INC_HELPER_PERSISTENTWINDOWSTATE_HXX
 #define INCLUDED_FRAMEWORK_INC_HELPER_PERSISTENTWINDOWSTATE_HXX
 
+#include <sal/config.h>
+
+#include <string_view>
+
 #include <com/sun/star/lang/XInitialization.hpp>
 #include <com/sun/star/frame/XFrame.hpp>
 #include <com/sun/star/frame/XFrameActionListener.hpp>
@@ -154,7 +158,7 @@ class PersistentWindowState final : public  ::cppu::WeakImplHelper<
                     contains the information about position and size.
          */
         static void implst_setWindowStateOnWindow(const css::uno::Reference< css::awt::XWindow >& xWindow     ,
-                                                  const OUString&                          sWindowState);
+                                                  std::u16string_view                      sWindowState);
 
 }; // class PersistentWindowState
 

framework/source/helper/persistentwindowstate.cxx

@@ -222,11 +222,11 @@ OUString PersistentWindowState::implst_getWindowStateFromWindow(const css::uno::
 }
 
 void PersistentWindowState::implst_setWindowStateOnWindow(const css::uno::Reference< css::awt::XWindow >& xWindow     ,
-                                                          const OUString&                          sWindowState)
+                                                          std::u16string_view                      sWindowState)
 {
     if (
         (!xWindow.is()                ) ||
-        ( sWindowState.isEmpty() )
+        ( sWindowState.empty() )
        )
         return;
 

framework/source/jobs/jobdata.cxx

@@ -17,6 +17,10 @@
  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  */
 
+#include <sal/config.h>
+
+#include <string_view>
+
 #include <jobs/configaccess.hxx>
 #include <jobs/jobdata.hxx>
 #include <classes/converter.hxx>
@@ -415,15 +419,15 @@ void JobData::disableJob()
     aConfig.close();
 }
 
-static bool isEnabled( const OUString& sAdminTime ,
+static bool isEnabled( std::u16string_view sAdminTime ,
-                    const OUString& sUserTime  )
+                    std::u16string_view sUserTime  )
 {
     /*Attention!
         To prevent interpreting of TriGraphs inside next const string value,
         we have to encode all '?' signs. Otherwise e.g. "??-" will be translated
         to "~" ...
      */
-    WildCard aISOPattern("\?\?\?\?-\?\?-\?\?*");
+    WildCard aISOPattern(u"\?\?\?\?-\?\?-\?\?*");
 
     bool bValidAdmin = aISOPattern.Matches(sAdminTime);
     bool bValidUser  = aISOPattern.Matches(sUserTime );

helpcompiler/source/BasCodeTagger.cxx

@@ -141,7 +141,7 @@ void BasicCodeTagger::tagParagraph( xmlNodePtr paragraph )
     m_Highlighter.getHighlightPortions( strLine, portions );
     for (auto const& portion : portions)
     {
-        OString sToken(OUStringToOString(strLine.copy(portion.nBegin, portion.nEnd-portion.nBegin), RTL_TEXTENCODING_UTF8));
+        OString sToken(OUStringToOString(strLine.subView(portion.nBegin, portion.nEnd-portion.nBegin), RTL_TEXTENCODING_UTF8));
         xmlNodePtr text = xmlNewText(reinterpret_cast<const xmlChar*>(sToken.getStr()));
         if ( portion.tokenType != TokenType::Whitespace )
         {

helpcompiler/source/HelpLinker.cxx

@@ -847,10 +847,10 @@ HelpProcessingErrorInfo& HelpProcessingErrorInfo::operator=( const struct HelpPr
 bool compileExtensionHelp
 (
     const OUString& aOfficeHelpPath,
-    const OUString& aExtensionName,
+    std::u16string_view aExtensionName,
     const OUString& aExtensionLanguageRoot,
     sal_Int32 nXhpFileCount, const OUString* pXhpFiles,
-    const OUString& aDestination,
+    std::u16string_view aDestination,
     HelpProcessingErrorInfo& o_rHelpProcessingErrorInfo
 )
 {

i18nlangtag/source/isolang/isolang.cxx

@@ -1416,8 +1416,8 @@ LanguageType MsLangId::Conversion::convertIsoNamesToLanguage( const OUString& rL
 
 
 // static
-LanguageType MsLangId::Conversion::convertIsoNamesToLanguage( const OString& rLang,
+LanguageType MsLangId::Conversion::convertIsoNamesToLanguage( std::string_view rLang,
-        const OString& rCountry )
+        std::string_view rCountry )
 {
     OUString aLang = OStringToOUString( rLang, RTL_TEXTENCODING_ASCII_US);
     OUString aCountry = OStringToOUString( rCountry, RTL_TEXTENCODING_ASCII_US);