ref: 4f108391d8a088f1f8956233cc47b89214bbdb3f
dir: /include/freetype/ftsysio.h/
#ifndef __FT_SYSTEM_IO_H__
#define __FT_SYSTEM_IO_H__
#include <ft2build.h>
#include FT_INTERNAL_OBJECT_H
FT_BEGIN_HEADER
/* handle to a FT_Stream object */
typedef struct FT_StreamRec_* FT_Stream;
/* handle to the FT_Stream class */
typedef const struct FT_Stream_ClassRec_* FT_Stream_Class;
/* a method used to read data from a stream into a buffer */
typedef FT_ULong (*FT_Stream_ReadFunc)( FT_Stream stream,
FT_Byte* buffer,
FT_ULong size );
/* a method used to seek to a new position within a stream */
/* position is always relative to the start */
typedef FT_Error (*FT_Stream_SeekFunc)( FT_Stream stream,
FT_ULong pos );
/* the stream class structure + some useful macros */
typedef struct FT_Stream_ClassRec_
{
FT_ClassRec clazz;
FT_Stream_ReadFunc stream_read;
FT_Stream_SeekFunc stream_seek;
} FT_Stream_ClassRec;
#define FT_STREAM_CLASS(x) ((FT_Stream_Class)(x))
#define FT_STREAM_CLASS__READ(x) FT_STREAM_CLASS(x)->stream_read
#define FT_STREAM_CLASS__SEEK(x) FT_STREAM_CLASS(x)->stream_seek;
/* the base FT_Stream object structure */
typedef struct FT_StreamRec_
{
FT_ObjectRec object;
FT_ULong size;
FT_ULong pos;
const FT_Byte* base;
const FT_Byte* cursor;
const FT_Byte* limit;
} FT_StreamRec;
/* some useful macros */
#define FT_STREAM(x) ((FT_Stream)(x))
#define FT_STREAM_P(x) ((FT_Stream*)(x))
#define FT_STREAM__READ(x) FT_STREAM_CLASS__READ(FT_OBJECT__CLASS(x))
#define FT_STREAM__SEEK(x) FT_STREAM_CLASS__SEEK(FT_OBJECT__CLASS(x))
#define FT_STREAM_IS_BASED(x) ( FT_STREAM(x)->base != NULL )
#if 0
#endif
/* */
FT_END_HEADER
#endif /* __FT_SYSTEM_STREAM_H__ */