3a37d8320c
Shaves lots of string allocations, and uses optimized code paths Change-Id: I8e33e2aecdc7e0d2f2c31b774daa36304b3973ac Reviewed-on: https://gerrit.libreoffice.org/c/core/+/173179 Tested-by: Jenkins Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>
251 lines
9.5 KiB
C++
251 lines
9.5 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#ifndef INCLUDED_SAX_FASTATTRIBS_HXX
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#define INCLUDED_SAX_FASTATTRIBS_HXX
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#include <com/sun/star/xml/sax/XFastAttributeList.hpp>
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#include <com/sun/star/xml/sax/XFastTokenHandler.hpp>
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#include <com/sun/star/util/XCloneable.hpp>
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#include <cppuhelper/implbase.hxx>
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#include <o3tl/string_view.hxx>
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#include <sax/saxdllapi.h>
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#include <string_view>
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#include <vector>
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namespace com::sun::star::xml::sax { class XFastTokenHandler; }
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namespace com::sun::star::xml { struct Attribute; }
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namespace com::sun::star::xml { struct FastAttribute; }
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namespace sax_fastparser
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{
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struct UnknownAttribute
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{
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OUString maNamespaceURL;
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OString maName;
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OString maValue;
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UnknownAttribute( OUString sNamespaceURL, OString aName, OString value );
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UnknownAttribute( OString sName, OString value );
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void FillAttribute( css::xml::Attribute* pAttrib ) const;
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};
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/// A native C++ interface to tokenisation
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class SAX_DLLPUBLIC FastTokenHandlerBase :
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public cppu::WeakImplHelper< css::xml::sax::XFastTokenHandler >
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{
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public:
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virtual ~FastTokenHandlerBase();
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virtual sal_Int32 getTokenDirect(std::string_view token) const = 0;
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/**
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* Client method to attempt the use of this interface if possible.
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* @xTokenHandler - the token lookup interface
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* @str - string buffer to lookup
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*
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* @return Tokenized form of str
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*/
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static sal_Int32 getTokenFromChars(
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const FastTokenHandlerBase *pTokenHandler,
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std::string_view str );
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};
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class SAX_DLLPUBLIC FastAttributeList final : public cppu::WeakImplHelper< css::xml::sax::XFastAttributeList, css::util::XCloneable >
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{
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public:
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FastAttributeList( FastTokenHandlerBase *pTokenHandler );
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FastAttributeList( const css::uno::Reference< css::xml::sax::XFastAttributeList > & xAttrList );
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virtual ~FastAttributeList() override;
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void clear();
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void reserve( sal_Int32 nNumTokens )
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{
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maAttributeValues.reserve(nNumTokens+1);
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maAttributeTokens.reserve(nNumTokens);
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}
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void add( const FastAttributeList& );
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void add( const css::uno::Reference<css::xml::sax::XFastAttributeList>& );
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void add( sal_Int32 nToken, std::string_view value );
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void add( sal_Int32 nToken, std::u16string_view sValue ); // Converts to UTF-8
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template <typename C, typename T1, typename T2>
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void add( sal_Int32 nToken, rtl::StringConcat<C, T1, T2>&& value) { add(nToken, Concat2View(value)); }
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template <typename Val, typename... Rest, std::enable_if_t<(sizeof...(Rest) > 0), int> = 0>
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void add( sal_Int32 nToken, Val&& val, Rest&&... rest )
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{
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add(nToken, std::forward<Val>(val));
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add(std::forward<Rest>(rest)...);
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}
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void addNS( sal_Int32 nNamespaceToken, sal_Int32 nToken, std::string_view sValue );
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void addNS( sal_Int32 nNamespaceToken, sal_Int32 nToken, std::u16string_view sValue );
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// note: rQName is *namespace-prefixed*
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void addUnknown( const OUString& rNamespaceURL, const OString& rQName, const OString& value );
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void addUnknown( const OString& rName, const OString& value );
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const std::vector< sal_Int32 >& getFastAttributeTokens() const { return maAttributeTokens; }
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const char* getFastAttributeValue(size_t nIndex) const { return mpChunk + maAttributeValues[nIndex]; }
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sal_Int32 AttributeValueLength(size_t i) const { return maAttributeValues[i + 1] - maAttributeValues[i] - 1; }
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size_t size() const { return maAttributeValues.size(); }
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// performance sensitive shortcuts to avoid allocation ...
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bool getAsInteger( sal_Int32 nToken, sal_Int32 &rInt) const;
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bool getAsDouble( sal_Int32 nToken, double &rDouble) const;
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bool getAsView( sal_Int32 nToken, std::string_view& rPos ) const;
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sal_Int32 getAsIntegerByIndex( sal_Int32 nTokenIndex ) const
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{
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return o3tl::toInt32(getAsViewByIndex(nTokenIndex));
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}
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std::string_view getAsViewByIndex( sal_Int32 nTokenIndex ) const
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{
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return std::string_view(getFastAttributeValue(nTokenIndex), AttributeValueLength(nTokenIndex));
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}
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OUString getValueByIndex( sal_Int32 nTokenIndex ) const
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{
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return OStringToOUString(getAsViewByIndex(nTokenIndex), RTL_TEXTENCODING_UTF8);
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}
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sal_Int32 getValueTokenByIndex(sal_Int32 nTokenIndex) const;
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// XFastAttributeList
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virtual sal_Bool SAL_CALL hasAttribute( ::sal_Int32 Token ) override;
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virtual ::sal_Int32 SAL_CALL getValueToken( ::sal_Int32 Token ) override;
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virtual ::sal_Int32 SAL_CALL getOptionalValueToken( ::sal_Int32 Token, ::sal_Int32 Default ) override;
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virtual OUString SAL_CALL getValue( ::sal_Int32 Token ) override;
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virtual OUString SAL_CALL getOptionalValue( ::sal_Int32 Token ) override;
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virtual css::uno::Sequence< css::xml::Attribute > SAL_CALL getUnknownAttributes( ) override;
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virtual css::uno::Sequence< css::xml::FastAttribute > SAL_CALL getFastAttributes() override;
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// XCloneable
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virtual ::css::uno::Reference< ::css::util::XCloneable > SAL_CALL createClone() override;
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sal_Int32 getAttributeIndex( ::sal_Int32 Token )
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{
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for (size_t i=0; i<maAttributeTokens.size(); ++i)
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if (maAttributeTokens[i] == Token)
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return i;
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return -1;
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}
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/// Use for fast iteration and conversion of attributes
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class FastAttributeIter {
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const FastAttributeList &mrList;
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size_t mnIdx;
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public:
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FastAttributeIter(const FastAttributeList &rList, size_t nIdx)
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: mrList(rList), mnIdx(nIdx)
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{
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}
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FastAttributeIter& operator++ ()
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{
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mnIdx++;
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return *this;
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}
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bool operator!=( const FastAttributeIter& rhs ) const
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{
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return mnIdx != rhs.mnIdx;
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}
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const FastAttributeIter& operator*() const
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{
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return *this;
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}
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sal_Int32 getToken() const
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{
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assert(mnIdx < mrList.maAttributeTokens.size());
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return mrList.maAttributeTokens[mnIdx];
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}
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bool isEmpty() const
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{
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assert(mnIdx < mrList.maAttributeTokens.size());
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return mrList.AttributeValueLength(mnIdx) < 1;
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}
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sal_Int32 toInt32() const
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{
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assert(mnIdx < mrList.maAttributeTokens.size());
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return mrList.getAsIntegerByIndex(mnIdx);
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}
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double toDouble() const
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{
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assert(mnIdx < mrList.maAttributeTokens.size());
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return o3tl::toDouble(mrList.getAsViewByIndex(mnIdx));
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}
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bool toBoolean() const
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{
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assert(mnIdx < mrList.maAttributeTokens.size());
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return rtl_str_toBoolean(mrList.getFastAttributeValue(mnIdx));
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}
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OUString toString() const
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{
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assert(mnIdx < mrList.maAttributeTokens.size());
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return mrList.getValueByIndex(mnIdx);
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}
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const char* toCString() const
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{
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assert(mnIdx < mrList.maAttributeTokens.size());
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return mrList.getFastAttributeValue(mnIdx);
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}
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sal_Int32 getLength() const
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{
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assert(mnIdx < mrList.maAttributeTokens.size());
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return mrList.AttributeValueLength(mnIdx);
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}
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std::string_view toView() const
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{
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assert(mnIdx < mrList.maAttributeTokens.size());
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return mrList.getAsViewByIndex(mnIdx);
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}
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bool isString(const char *str) const
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{
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assert(mnIdx < mrList.maAttributeTokens.size());
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return !strcmp(str, mrList.getFastAttributeValue(mnIdx));
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}
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};
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FastAttributeIter begin() const { return FastAttributeIter(*this, 0); }
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FastAttributeIter end() const { return FastAttributeIter(*this, maAttributeTokens.size()); }
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FastAttributeIter find( sal_Int32 nToken ) const;
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private:
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char *mpChunk; ///< buffer to store all attribute values - null terminated strings
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sal_Int32 mnChunkLength; ///< size of allocated memory for mpChunk
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// maAttributeValues stores pointers, relative to mpChunk, for each attribute value string
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// length of the string is maAttributeValues[n+1] - maAttributeValues[n] - 1
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// maAttributeValues[0] == 0
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std::vector< sal_Int32 > maAttributeValues;
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std::vector< sal_Int32 > maAttributeTokens;
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std::vector< UnknownAttribute > maUnknownAttributes;
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FastTokenHandlerBase * mpTokenHandler;
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};
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inline FastAttributeList& castToFastAttributeList(
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const css::uno::Reference< css::xml::sax::XFastAttributeList >& xAttrList )
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{
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assert( dynamic_cast <FastAttributeList *> ( xAttrList.get() ) != nullptr );
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return *static_cast <FastAttributeList *> ( xAttrList.get() );
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}
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}
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#endif
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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