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