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| 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 */ | |
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