/***************************************************************************/
/*                                                                         */
/*  ftsystem.h                                                             */
/*                                                                         */
/*    FreeType low-level system interface definition (specification).      */
/*                                                                         */
/*  Copyright 1996-2000 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 FTSYSTEM_H
#define FTSYSTEM_H


/*************************************************************************/
/*                                                                       */
/*                  M E M O R Y   M A N A G E M E N T                    */
/*                                                                       */
/*************************************************************************/


typedef struct FT_MemoryRec_*  FT_Memory;


typedef void*  ( *FT_Alloc_Func )( FT_Memory memory,
								   long size );

typedef void ( *FT_Free_Func )( FT_Memory memory,
								void*      block );

typedef void*  ( *FT_Realloc_Func )( FT_Memory memory,
									 long cur_size,
									 long new_size,
									 void*      block );


struct FT_MemoryRec_
{
	void*            user;
	FT_Alloc_Func alloc;
	FT_Free_Func free;
	FT_Realloc_Func realloc;
};


/*************************************************************************/
/*                                                                       */
/*                       I / O   M A N A G E M E N T                     */
/*                                                                       */
/*************************************************************************/


typedef union  FT_StreamDesc_
{
	long value;
	void*  pointer;

} FT_StreamDesc;


typedef struct FT_StreamRec_*  FT_Stream;


typedef unsigned long ( *FT_Stream_IO )( FT_Stream stream,
										 unsigned long offset,
										 unsigned char*  buffer,
										 unsigned long count );

typedef void ( *FT_Stream_Close )( FT_Stream stream );


struct  FT_StreamRec_
{
	unsigned char*   base;
	unsigned long size;
	unsigned long pos;

	FT_StreamDesc descriptor;
	FT_StreamDesc pathname;       /* ignored by FreeType -- */
								  /* useful for debugging   */
	FT_Stream_IO read;
	FT_Stream_Close close;

	FT_Memory memory;
	unsigned char*   cursor;
	unsigned char*   limit;
};


#endif /* FTSYSTEM_H */


/* END */
