ANTLR Support Libraries 2.7.1+
antlr/CharInputBuffer.hpp
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00001 #ifndef INC_CharInputBuffer_hpp__
00002 # define INC_CharInputBuffer_hpp__
00003 
00004 /* ANTLR Translator Generator
00005  * Project led by Terence Parr at http://www.jGuru.com
00006  * Software rights: http://www.antlr.org/license.html
00007  *
00008  * $Id:$
00009  */
00010 
00011 # include <antlr/config.hpp>
00012 # include <antlr/InputBuffer.hpp>
00013 
00014 # ifdef HAS_NOT_CCTYPE_H
00015 #  include <ctype.h>
00016 # else
00017 #  include <cctype>
00018 # endif
00019 
00020 #ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
00021 namespace antlr {
00022 #endif
00023 
00026 class CharInputBuffer : public InputBuffer
00027 {
00028 public:
00033    CharInputBuffer( unsigned char* buf, size_t size, bool owner = false )
00034    : buffer(buf)
00035    , ptr(buf)
00036    , end(buf + size)
00037    , delete_buffer(owner)
00038    {
00039    }
00040 
00045    ~CharInputBuffer( void )
00046    {
00047       if( delete_buffer && buffer )
00048          delete [] buffer;
00049    }
00050 
00055    virtual inline void reset( void )
00056    {
00057       InputBuffer::reset();
00058       ptr = buffer;
00059    }
00060 
00061    virtual int getChar( void )
00062    {
00063       return (ptr < end) ? *ptr++ : EOF;
00064    }
00065 
00066 protected:
00067    unsigned char* buffer;  
00068    unsigned char* ptr;     
00069    unsigned char* end;     
00070    bool delete_buffer;     
00071 };
00072 
00073 #ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
00074 }
00075 #endif
00076 
00077 #endif
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