1 /* 2 * Copyright (C) 1998-2004 David Turner and Werner Lemberg 3 * Copyright (C) 2006 Behdad Esfahbod 4 * 5 * This is part of HarfBuzz, an OpenType Layout engine library. 6 * 7 * Permission is hereby granted, without written agreement and without 8 * license or royalty fees, to use, copy, modify, and distribute this 9 * software and its documentation for any purpose, provided that the 10 * above copyright notice and the following two paragraphs appear in 11 * all copies of this software. 12 * 13 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR 14 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES 15 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN 16 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH 17 * DAMAGE. 18 * 19 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, 20 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 21 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS 22 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO 23 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. 24 */ 25 26 #ifndef HARFBUZZ_STREAM_PRIVATE_H 27 #define HARFBUZZ_STREAM_PRIVATE_H 28 29 #include "harfbuzz-impl.h" 30 #include "harfbuzz-stream.h" 31 32 HB_BEGIN_HEADER 33 34 HB_INTERNAL void 35 _hb_close_stream( HB_Stream stream ); 36 37 HB_INTERNAL HB_Int 38 _hb_stream_pos( HB_Stream stream ); 39 40 HB_INTERNAL HB_Error 41 _hb_stream_seek( HB_Stream stream, 42 HB_UInt pos ); 43 44 HB_INTERNAL HB_Error 45 _hb_stream_frame_enter( HB_Stream stream, 46 HB_UInt size ); 47 48 HB_INTERNAL void 49 _hb_stream_frame_exit( HB_Stream stream ); 50 51 /* convenience macros */ 52 53 #define SET_ERR(c) ( (error = (c)) != 0 ) 54 55 #define GOTO_Table(tag) (0) 56 #define FILE_Pos() _hb_stream_pos( stream ) 57 #define FILE_Seek(pos) SET_ERR( _hb_stream_seek( stream, pos ) ) 58 #define ACCESS_Frame(size) SET_ERR( _hb_stream_frame_enter( stream, size ) ) 59 #define FORGET_Frame() _hb_stream_frame_exit( stream ) 60 61 #define GET_Byte() (*stream->cursor++) 62 #define GET_Short() (stream->cursor += 2, (HB_Short)( \ 63 (*(((HB_Byte*)stream->cursor)-2) << 8) | \ 64 *(((HB_Byte*)stream->cursor)-1) \ 65 )) 66 #define GET_Long() (stream->cursor += 4, (HB_Int)( \ 67 (*(((HB_Byte*)stream->cursor)-4) << 24) | \ 68 (*(((HB_Byte*)stream->cursor)-3) << 16) | \ 69 (*(((HB_Byte*)stream->cursor)-2) << 8) | \ 70 *(((HB_Byte*)stream->cursor)-1) \ 71 )) 72 73 74 #define GET_Char() ((HB_Char)GET_Byte()) 75 #define GET_UShort() ((HB_UShort)GET_Short()) 76 #define GET_ULong() ((HB_UInt)GET_Long()) 77 #define GET_Tag4() GET_ULong() 78 79 HB_END_HEADER 80 81 #endif /* HARFBUZZ_STREAM_PRIVATE_H */ 82