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       1             : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2             : /*
       3             :  * This file is part of the LibreOffice project.
       4             :  *
       5             :  * This Source Code Form is subject to the terms of the Mozilla Public
       6             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       7             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
       8             :  *
       9             :  * This file incorporates work covered by the following license notice:
      10             :  *
      11             :  *   Licensed to the Apache Software Foundation (ASF) under one or more
      12             :  *   contributor license agreements. See the NOTICE file distributed
      13             :  *   with this work for additional information regarding copyright
      14             :  *   ownership. The ASF licenses this file to you under the Apache
      15             :  *   License, Version 2.0 (the "License"); you may not use this file
      16             :  *   except in compliance with the License. You may obtain a copy of
      17             :  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
      18             :  */
      19             : 
      20             : #ifndef ADC_TKPCHARS_HXX
      21             : #define ADC_TKPCHARS_HXX
      22             : 
      23             : // USED SERVICES
      24             :     // BASE CLASSES
      25             :     // COMPONENTS
      26             :     // PARAMETRS
      27             : #include <adc_cl.hxx>
      28             : #include <stack>
      29             : 
      30             : 
      31             : 
      32             : /** @descr
      33             : 
      34             :     dpSource:
      35             : 
      36             :     1||||||||||||||||||||||a||||||||||||b|||c||||||||||||||||||||...
      37             : 
      38             : 
      39             :     1 := first character of Sourcecode.
      40             :     a := nLastTokenStart, there starts the last cut token.
      41             :     b := nLastCut, there is a '\0'-char which marks the end of
      42             :          the last cut token. The original character at b is stored
      43             :          in cCharAtLastCut and will replace the '\0'-char, when the
      44             :          next token is cut.
      45             :     c := The current cursor position.
      46             : 
      47             : 
      48             :     @needs  cosv.lib
      49             : 
      50             :     @use    This class can be used by any parser to get the chars of a
      51             :             text one by one and separate them to tokens.
      52             : **/
      53             : 
      54             : class CharacterSource
      55             : {
      56             :     public:
      57             :         // LIFECYCLE
      58             :                         CharacterSource();
      59             :                         ~CharacterSource();
      60             : 
      61             :         // OPERATIONS
      62             :         /** Loads the complete contents of in_rSource into the classes private memory.
      63             :             If in_rSource is a file, it has to be open of course.
      64             :             After loading the text, the CurChar() is set on the begin of the text.
      65             :         **/
      66             :         void            LoadText(
      67             :                             csv::bstream &      io_rSource);
      68             : 
      69             :         /// @return CurChar() after moving forward one char.
      70             :             char            MoveOn();
      71             :         /** @return
      72             :             The token which starts at the char which was CurChar(), when
      73             :             CutToken() was called the last time - or at the beginning of the text.
      74             :             The token ends by the CurChar() being replaced by a '\0'.
      75             : 
      76             :             Value is valid until the next call of CutToken() or ~CharacterSource().
      77             :         **/
      78             :         const char *    CutToken();
      79             : 
      80             :         // INQUIRY
      81             :         char            CurChar() const;
      82             :         /// @return The result of the last CutToken(). Or NULL, if there was none yet.
      83             :         const char *    CurToken() const;
      84             : 
      85             :     // INQUIRY
      86             :         /// @return true, if
      87             :         bool            IsFinished() const;
      88             : 
      89             :     private:
      90             :         void            BeginSource();
      91             :         intt            CurPos() const;
      92             : 
      93             :         DYN char *      dpSource;
      94             :         intt            nSourceSize;
      95             : 
      96             :         intt            nCurPos;
      97             :         intt            nLastCut;
      98             :         intt            nLastTokenStart;
      99             :         char            cCharAtLastCut;
     100             : };
     101             : 
     102             : 
     103             : inline char
     104    11430960 : CharacterSource::MoveOn()
     105             :     {
     106    11430960 : if (DEBUG_ShowText())
     107             : {
     108           0 :         Cerr() << char(dpSource[nCurPos+1]) << Flush();
     109             : }
     110    11430960 :         if ( nCurPos < nSourceSize-1 )
     111    11426825 :             return dpSource[++nCurPos];
     112             :         else
     113        4135 :             return dpSource[nCurPos = nSourceSize];
     114             :     }
     115             : inline char
     116     2340156 : CharacterSource::CurChar() const
     117     2340156 :     { return nCurPos != nLastCut ? dpSource[nCurPos] : cCharAtLastCut; }
     118             : inline const char *
     119           0 : CharacterSource::CurToken() const
     120           0 :     { return &dpSource[nLastTokenStart]; }
     121             : inline bool
     122     2566254 : CharacterSource::IsFinished() const
     123     2566254 :     { return nCurPos >= nSourceSize; }
     124             : inline intt
     125     1915863 : CharacterSource::CurPos() const
     126     1915863 :     { return nCurPos; }
     127             : 
     128             : 
     129             : 
     130             : 
     131             : #endif
     132             : 
     133             : 
     134             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */