84 lines
2.7 KiB
C
84 lines
2.7 KiB
C
/*
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* Copyright (C) 1998-2004 David Turner and Werner Lemberg
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* Copyright (C) 2006 Behdad Esfahbod
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*
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* This is part of HarfBuzz, an OpenType Layout engine library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*/
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#ifndef HARFBUZZ_STREAM_PRIVATE_H
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#define HARFBUZZ_STREAM_PRIVATE_H
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#include "harfbuzz-impl.h"
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HB_BEGIN_HEADER
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typedef FT_Stream HB_Stream;
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HB_INTERNAL HB_Int
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_hb_stream_pos( HB_Stream stream );
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HB_INTERNAL HB_Error
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_hb_stream_seek( HB_Stream stream,
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HB_UInt pos );
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HB_INTERNAL HB_Error
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_hb_stream_frame_enter( HB_Stream stream,
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HB_UInt size );
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HB_INTERNAL void
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_hb_stream_frame_exit( HB_Stream stream );
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HB_INTERNAL HB_Error
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_hb_font_goto_table( HB_Font font,
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HB_UInt tag );
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/* convenience macros */
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#define SET_ERR(c) ( (error = (c)) != 0 )
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#define GOTO_Table(tag) SET_ERR( _hb_font_goto_table( font, tag ) )
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#define FILE_Pos() _hb_stream_pos( stream )
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#define FILE_Seek(pos) SET_ERR( _hb_stream_seek( stream, pos ) )
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#define ACCESS_Frame(size) SET_ERR( _hb_stream_frame_enter( stream, size ) )
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#define FORGET_Frame() _hb_stream_frame_exit( stream )
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#define GET_Byte() (*stream->cursor++)
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#define GET_Short() (stream->cursor += 2, (HB_Short)( \
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(*(((HB_Byte*)stream->cursor)-2) << 8) | \
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*(((HB_Byte*)stream->cursor)-1) \
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))
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#define GET_Long() (stream->cursor += 4, (HB_Int)( \
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(*(((HB_Byte*)stream->cursor)-4) << 24) | \
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(*(((HB_Byte*)stream->cursor)-3) << 16) | \
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(*(((HB_Byte*)stream->cursor)-2) << 8) | \
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*(((HB_Byte*)stream->cursor)-1) \
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))
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#define GET_Char() ((HB_Char)GET_Byte())
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#define GET_UShort() ((HB_UShort)GET_Short())
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#define GET_ULong() ((HB_UInt)GET_Long())
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#define GET_Tag4() GET_ULong()
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HB_END_HEADER
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#endif /* HARFBUZZ_STREAM_PRIVATE_H */
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