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Diffstat (limited to '')
| -rw-r--r-- | idl/inc/lex.hxx | 217 |
1 files changed, 217 insertions, 0 deletions
diff --git a/idl/inc/lex.hxx b/idl/inc/lex.hxx new file mode 100644 index 000000000..b7aa9336d --- /dev/null +++ b/idl/inc/lex.hxx @@ -0,0 +1,217 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ + +#ifndef INCLUDED_IDL_INC_LEX_HXX +#define INCLUDED_IDL_INC_LEX_HXX + +#include <sal/types.h> +#include "hash.hxx" +#include <tools/stream.hxx> +#include <vector> +#include <memory> + +enum class SVTOKENTYPE { Empty, Comment, + Integer, String, + Bool, Identifier, + Char, + EndOfFile, HashId }; + +class SvToken +{ +friend class SvTokenStream; + sal_uInt64 nLine, nColumn; + SVTOKENTYPE nType; + OString aString; + union + { + sal_uInt64 nLong; + bool bBool; + char cChar; + SvStringHashEntry * pHash; + }; +public: + SvToken(); + SvToken( const SvToken & rObj ) = delete; + + SvToken & operator = ( const SvToken & rObj ); + + OString GetTokenAsString() const; + + void SetLine( sal_uInt64 nLineP ) { nLine = nLineP; } + sal_uInt64 GetLine() const { return nLine; } + + void SetColumn( sal_uInt64 nColumnP ) { nColumn = nColumnP; } + sal_uInt64 GetColumn() const { return nColumn; } + + bool IsComment() const { return nType == SVTOKENTYPE::Comment; } + bool IsInteger() const { return nType == SVTOKENTYPE::Integer; } + bool IsString() const { return nType == SVTOKENTYPE::String; } + bool IsBool() const { return nType == SVTOKENTYPE::Bool; } + bool IsIdentifierHash() const + { return nType == SVTOKENTYPE::HashId; } + bool IsIdentifier() const + { + return nType == SVTOKENTYPE::Identifier + || nType == SVTOKENTYPE::HashId; + } + bool IsChar() const { return nType == SVTOKENTYPE::Char; } + bool IsEof() const { return nType == SVTOKENTYPE::EndOfFile; } + + const OString& GetString() const + { + return IsIdentifierHash() + ? pHash->GetName() + : aString; + } + sal_uInt64 GetNumber() const { return nLong; } + bool GetBool() const { return bBool; } + char GetChar() const { return cChar; } + + void SetHash( SvStringHashEntry * pHashP ) + { pHash = pHashP; nType = SVTOKENTYPE::HashId; } + bool Is( SvStringHashEntry const * pEntry ) const + { return IsIdentifierHash() && pHash == pEntry; } +}; + +inline SvToken::SvToken() + : nLine(0) + , nColumn(0) + , nType( SVTOKENTYPE::Empty ) +{ +} + +class SvTokenStream +{ + sal_uInt64 nLine, nColumn; + sal_Int32 nBufPos; + char c; // next character + static const sal_uInt16 nTabSize = 4; // length of tabulator + OString aStrTrue; + OString aStrFalse; + sal_uInt32 nMaxPos; + + std::unique_ptr<SvFileStream> pInStream; + OUString aFileName; + std::vector<std::unique_ptr<SvToken> > aTokList; + std::vector<std::unique_ptr<SvToken> >::iterator pCurToken; + + OString aBufStr; + + void InitCtor(); + + char GetNextChar(); + char GetFastNextChar() + { + return (nBufPos < aBufStr.getLength()) + ? aBufStr[nBufPos++] + : '\0'; + } + + void FillTokenList(); + sal_uInt64 GetNumber(); + bool MakeToken( SvToken & ); + bool IsEof() const { return pInStream->eof(); } + void SetMax() + { + sal_uInt32 n = Tell(); + if( n > nMaxPos ) + nMaxPos = n; + } + void CalcColumn() + { + // if end of line spare calculation + if( 0 != c ) + { + sal_Int32 n = 0; + nColumn = 0; + while( n < nBufPos ) + nColumn += aBufStr[n++] == '\t' ? nTabSize : 1; + } + } +public: + SvTokenStream( const OUString & rFileName ); + ~SvTokenStream(); + + const OUString & GetFileName() const { return aFileName; } + SvStream & GetStream() { return *pInStream; } + + SvToken& GetToken_PrevAll() + { + std::vector<std::unique_ptr<SvToken> >::iterator pRetToken = pCurToken; + + // current iterator always valid + if(pCurToken != aTokList.begin()) + --pCurToken; + + return *(*pRetToken); + } + + SvToken& GetToken_Next() + { + std::vector<std::unique_ptr<SvToken> >::iterator pRetToken = pCurToken++; + + if (pCurToken == aTokList.end()) + pCurToken = pRetToken; + + SetMax(); + + return *(*pRetToken); + } + + SvToken& GetToken() const { return *(*pCurToken); } + + bool ReadIf( char cChar ) + { + if( GetToken().IsChar() && cChar == GetToken().GetChar() ) + { + GetToken_Next(); + return true; + } + else + return false; + } + + void ReadIfDelimiter() + { + if( GetToken().IsChar() + && (';' == GetToken().GetChar() + || ',' == GetToken().GetChar()) ) + { + GetToken_Next(); + } + } + + sal_uInt32 Tell() const { return pCurToken-aTokList.begin(); } + + void Seek( sal_uInt32 nPos ) + { + pCurToken = aTokList.begin() + nPos; + SetMax(); + } + + void SeekToMax() + { + pCurToken = aTokList.begin()+nMaxPos; + } +}; + + +#endif // INCLUDED_IDL_INC_LEX_HXX + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |