Security/libsecurity_codesigning/antlr2/antlr/CharInputBuffer.hpp

   1 #ifndef INC_CharInputBuffer_hpp__
   2 # define INC_CharInputBuffer_hpp__
   3
   4 /* ANTLR Translator Generator
   5  * Project led by Terence Parr at http://www.jGuru.com
   6  * Software rights: http://www.antlr.org/license.html
   7  *
   8  * $Id:$
   9  */
  10
  11 # include <antlr/config.hpp>
  12 # include <antlr/InputBuffer.hpp>
  13
  14 # ifdef HAS_NOT_CCTYPE_H
  15 #       include <ctype.h>
  16 # else
  17 #       include <cctype>
  18 # endif
  19
  20 #ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
  21 namespace antlr {
  22 #endif
  23
  24 /** CharInputBuffer.hpp provides an InputBuffer for plain character arrays (buffers).
  25  */
  26 class CharInputBuffer : public InputBuffer
  27 {
  28 public:
  29         /** Construct a CharInputBuffer.hpp object with a char* buffer of 'size'
  30          * if 'owner' is true, then the buffer will be delete[]-ed on destruction.
  31          * @note it is assumed the buffer was allocated with new[]!
  32          */
  33         CharInputBuffer( unsigned char* buf, size_t size, bool owner = false )
  34         : buffer(buf)
  35         , ptr(buf)
  36         , end(buf + size)
  37         , delete_buffer(owner)
  38         {
  39         }
  40
  41         /** Destructor
  42          * @note If you're using malloced data, then you probably need to change
  43          * this destructor. Or better use this class as template for your own.
  44          */
  45         ~CharInputBuffer( void )
  46         {
  47                 if( delete_buffer && buffer )
  48                         delete [] buffer;
  49         }
  50
  51         /** Reset the CharInputBuffer to initial state
  52          * Called from LexerInputState::reset.
  53          * @see LexerInputState
  54          */
  55         virtual inline void reset( void )
  56         {
  57                 InputBuffer::reset();
  58                 ptr = buffer;
  59         }
  60
  61         virtual int getChar( void )
  62         {
  63                 return (ptr < end) ? *ptr++ : EOF;
  64         }
  65
  66 protected:
  67         unsigned char* buffer;  ///< the buffer with data
  68         unsigned char* ptr;             ///< position ptr into the buffer
  69         unsigned char* end;             ///< end sentry for buffer
  70         bool delete_buffer;             ///< flag signifying if we have to delete the buffer
  71 };
  72
  73 #ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
  74 }
  75 #endif
  76
  77 #endif