xref: /external/freetype/src/cff/cffparse.h

/***************************************************************************/
/*                                                                         */
/*  cffparse.h                                                             */
/*                                                                         */
/*    CFF token stream parser (specification)                              */
/*                                                                         */
/*  Copyright 1996-2003, 2011 by                                           */
/*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
/*                                                                         */
/*  This file is part of the FreeType project, and may only be used,       */
/*  modified, and distributed under the terms of the FreeType project      */
/*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
/*  this file you indicate that you have read the license and              */
/*  understand and accept it fully.                                        */
/*                                                                         */
/***************************************************************************/


#ifndef __CFF_PARSE_H__
#define __CFF_PARSE_H__


#include <ft2build.h>
#include "cfftypes.h"
#include FT_INTERNAL_OBJECTS_H


FT_BEGIN_HEADER


#define CFF_MAX_STACK_DEPTH  96

#define CFF_CODE_TOPDICT  0x1000
#define CFF_CODE_PRIVATE  0x2000


  typedef struct  CFF_ParserRec_
  {
    FT_Library library;
    FT_Byte*   start;
    FT_Byte*   limit;
    FT_Byte*   cursor;

    FT_Byte*   stack[CFF_MAX_STACK_DEPTH + 1];
    FT_Byte**  top;

    FT_UInt    object_code;
    void*      object;

  } CFF_ParserRec, *CFF_Parser;


  FT_LOCAL( void )
  cff_parser_init( CFF_Parser  parser,
                   FT_UInt     code,
                   void*       object,
                   FT_Library  library);

  FT_LOCAL( FT_Error )
  cff_parser_run( CFF_Parser  parser,
                  FT_Byte*    start,
                  FT_Byte*    limit );


  enum
  {
    cff_kind_none = 0,
    cff_kind_num,
    cff_kind_fixed,
    cff_kind_fixed_thousand,
    cff_kind_string,
    cff_kind_bool,
    cff_kind_delta,
    cff_kind_callback,

    cff_kind_max  /* do not remove */
  };


  /* now generate handlers for the most simple fields */
  typedef FT_Error  (*CFF_Field_Reader)( CFF_Parser  parser );

  typedef struct  CFF_Field_Handler_
  {
    int               kind;
    int               code;
    FT_UInt           offset;
    FT_Byte           size;
    CFF_Field_Reader  reader;
    FT_UInt           array_max;
    FT_UInt           count_offset;

#ifdef FT_DEBUG_LEVEL_TRACE
    const char*       id;
#endif

  } CFF_Field_Handler;


FT_END_HEADER


#endif /* __CFF_PARSE_H__ */


/* END */