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/* -*- 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_uLong nLine, nColumn;
SVTOKENTYPE nType;
OString aString;
union
{
sal_uLong 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_uLong nLineP ) { nLine = nLineP; }
sal_uLong GetLine() const { return nLine; }
void SetColumn( sal_uLong nColumnP ) { nColumn = nColumnP; }
sal_uLong 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_uLong 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 * pEntry ) const
{ return IsIdentifierHash() && pHash == pEntry; }
};
inline SvToken::SvToken()
: nLine(0)
, nColumn(0)
, nType( SVTOKENTYPE::Empty )
{
}
class SvTokenStream
{
sal_uLong nLine, nColumn;
int nBufPos;
int c; // next character
static const sal_uInt16 nTabSize = 4; // length of tabulator
OString aStrTrue;
OString aStrFalse;
sal_uLong nMaxPos;
SvFileStream * pInStream;
OUString aFileName;
std::vector<std::unique_ptr<SvToken> > aTokList;
std::vector<std::unique_ptr<SvToken> >::iterator pCurToken;
OString aBufStr;
void InitCtor();
int GetNextChar();
int GetFastNextChar()
{
return (nBufPos < aBufStr.getLength())
? aBufStr[nBufPos++]
: '\0';
}
void FillTokenList();
sal_uLong GetNumber();
bool MakeToken( SvToken & );
bool IsEof() const { return pInStream->IsEof(); }
void SetMax()
{
sal_uLong n = Tell();
if( n > nMaxPos )
nMaxPos = n;
}
void CalcColumn()
{
// if end of line spare calculation
if( 0 != c )
{
sal_uInt16 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).get();
}
SvToken& GetToken_Next()
{
std::vector<std::unique_ptr<SvToken> >::iterator pRetToken = pCurToken++;
if (pCurToken == aTokList.end())
pCurToken = pRetToken;
SetMax();
return *(*pRetToken).get();
}
SvToken& GetToken() const { return *(*pCurToken).get(); }
bool ReadIf( char cChar )
{
if( GetToken().IsChar() && cChar == GetToken().GetChar() )
{
GetToken_Next();
return true;
}
else
return false;
}
bool ReadIfDelimiter()
{
if( GetToken().IsChar()
&& (';' == GetToken().GetChar()
|| ',' == GetToken().GetChar()) )
{
GetToken_Next();
return true;
}
return false;
}
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: */
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