PPTMarkFinder.cc

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00001 // PPTMarkFinder.cc
00002 
00003 // This file is part of bes, A C++ back-end server implementation framework
00004 // for the OPeNDAP Data Access Protocol.
00005 
00006 // Copyright (c) 2004,2005 University Corporation for Atmospheric Research
00007 // Author: Patrick West <pwest@ucar.edu> and Jose Garcia <jgarcia@ucar.edu>
00008 //
00009 // This library is free software; you can redistribute it and/or
00010 // modify it under the terms of the GNU Lesser General Public
00011 // License as published by the Free Software Foundation; either
00012 // version 2.1 of the License, or (at your option) any later version.
00013 // 
00014 // This library is distributed in the hope that it will be useful,
00015 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00016 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00017 // Lesser General Public License for more details.
00018 // 
00019 // You should have received a copy of the GNU Lesser General Public
00020 // License along with this library; if not, write to the Free Software
00021 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00022 //
00023 // You can contact University Corporation for Atmospheric Research at
00024 // 3080 Center Green Drive, Boulder, CO 80301
00025  
00026 // (c) COPYRIGHT University Corporation for Atmospheric Research 2004-2005
00027 // Please read the full copyright statement in the file COPYRIGHT_UCAR.
00028 //
00029 // Authors:
00030 //      pwest       Patrick West <pwest@ucar.edu>
00031 //      jgarcia     Jose Garcia <jgarcia@ucar.edu>
00032 
00033 #include "PPTMarkFinder.h"
00034 #include "PPTException.h"
00035 
00036 PPTMarkFinder::PPTMarkFinder( unsigned char *mark, int markLength )
00037     : _markIndex( 0 ),
00038       _markLength( markLength )
00039 {
00040     // Lets get sure we will not overrun the buffer
00041     if (markLength > PPTMarkFinder_Buffer_Size)
00042         throw PPTException( "mark given will overrun internal buffer.",
00043                             __FILE__, __LINE__ ) ;
00044     memcpy((void*) _mark, (void*) mark, (markLength * sizeof(unsigned char)) );
00045 }
00046 
00047 bool
00048 PPTMarkFinder::markCheck( unsigned char b )
00049 {
00050     if( _mark[_markIndex] == b )
00051     {
00052         _markIndex++;
00053         if( _markIndex == _markLength )
00054         {
00055             _markIndex = 0;
00056             return true ;
00057         }
00058     }
00059     else
00060     {
00061         _markIndex = 0 ;
00062     }
00063 
00064     return false ;
00065 }
00066 

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