libcrbn/scanner.hpp

#ifndef __scanner_hpp__
#define __scanner_hpp__

#include <stdio.h>

#define SCAN_BUFFER_SIZE 1024

/*
  Structural words:
  - include
  - framebegin
  - frameend

  Outframe words:
  - camera
  - renderer
  - output
  - objectset
  - sampler
  
  Inframe words:
  - object
  - matter
  - shader
  - identity
  - matrixload
  - matrixmul
  - translate
  - scale
  - rotate
*/
typedef enum {
  OPEN_PARENT = '(',
  CLOSE_PARENT = ')',
  OPEN_BRACE = '{',
  CLOSE_BRACE = '}',
  COMMA = ',',

  INCLUDE = 1000,
  FRAME_BEGIN,
  FRAME_END,

  CAMERA,
  RENDERER,
  OUTPUT,
  OBJECTSET,
  SAMPLER,

  OBJECT,
  MATTER,
  SHADER,

  IDENTITY,
  MATRIX_LOAD,
  MATRIX_MUL,
  TRANSLATE,
  SCALE,
  ROTATE,

  INTEGER,
  REAL,
  STRING
} TYPE;

class Scanner
{
 public:
  Scanner( FILE* fp = NULL );

  TYPE parse();
 private:
  void buffer_fill();

  FILE* _fp;
  int _pos_current;
  long _file_pos;
  char _buffer[ SCAN_BUFFER_SIZE ];
};
#endif // __scanner_hpp__

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