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/*******************************************************************
*
* Copyright 1996-2000 by
* David Turner, Robert Wilhelm, and Werner Lemberg.
*
* Copyright 2006 Behdad Esfahbod
*
* This is part of HarfBuzz, an OpenType Layout engine library.
*
* See the file name COPYING for licensing information.
*
******************************************************************/
#ifndef HARFBUZZ_STREAM_PRIVATE_H
#define HARFBUZZ_STREAM_PRIVATE_H
#include "harfbuzz-impl.h"
HB_BEGIN_HEADER
typedef FT_Stream HB_Stream;
HB_INTERNAL HB_Int
_hb_stream_pos( HB_Stream stream );
HB_INTERNAL HB_Error
_hb_stream_seek( HB_Stream stream,
HB_UInt pos );
HB_INTERNAL HB_Error
_hb_stream_frame_enter( HB_Stream stream,
HB_UInt size );
HB_INTERNAL void
_hb_stream_frame_exit( HB_Stream stream );
HB_INTERNAL HB_Error
_hb_font_goto_table( HB_Font font,
HB_UInt tag );
/* convenience macros */
#define SET_ERR(c) ( (error = (c)) != 0 )
#define GOTO_Table(tag) SET_ERR( _hb_font_goto_table( font, tag ) )
#define FILE_Pos() _hb_stream_pos( stream )
#define FILE_Seek(pos) SET_ERR( _hb_stream_seek( stream, pos ) )
#define ACCESS_Frame(size) SET_ERR( _hb_stream_frame_enter( stream, size ) )
#define FORGET_Frame() _hb_stream_frame_exit( stream )
#define GET_Byte() (*stream->cursor++)
#define GET_Short() (stream->cursor += 2, (HB_Short)( \
(*(((HB_Byte*)stream->cursor)-2) << 8) | \
*(((HB_Byte*)stream->cursor)-1) \
))
#define GET_Long() (stream->cursor += 4, (HB_Int)( \
(*(((HB_Byte*)stream->cursor)-4) << 24) | \
(*(((HB_Byte*)stream->cursor)-3) << 16) | \
(*(((HB_Byte*)stream->cursor)-2) << 8) | \
*(((HB_Byte*)stream->cursor)-1) \
))
#define GET_Char() ((HB_Char)GET_Byte())
#define GET_UShort() ((HB_UShort)GET_Short())
#define GET_ULong() ((HB_UInt)GET_Long())
#define GET_Tag4() GET_ULong()
HB_END_HEADER
#endif /* HARFBUZZ_STREAM_PRIVATE_H */
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