1/*
2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
3 *
4 * This code is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 only, as
6 * published by the Free Software Foundation.  Oracle designates this
7 * particular file as subject to the "Classpath" exception as provided
8 * by Oracle in the LICENSE file that accompanied this code.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26/*
27 *
28 * (C) Copyright IBM Corp. 1998-2004 - All Rights Reserved
29 *
30 */
31
32#ifndef __LOOKUPTABLES_H
33#define __LOOKUPTABLES_H
34
35/**
36 * \file
37 * \internal
38 */
39
40#include "LETypes.h"
41#include "LayoutTables.h"
42#include "LETableReference.h"
43
44U_NAMESPACE_BEGIN
45
46enum LookupTableFormat
47{
48    ltfSimpleArray      = 0,
49    ltfSegmentSingle    = 2,
50    ltfSegmentArray     = 4,
51    ltfSingleTable      = 6,
52    ltfTrimmedArray     = 8
53};
54
55typedef le_int16 LookupValue;
56
57struct LookupTable
58{
59    le_int16 format;
60};
61
62struct LookupSegment
63{
64    TTGlyphID   lastGlyph;
65    TTGlyphID   firstGlyph;
66    LookupValue value;
67};
68
69struct LookupSingle
70{
71    TTGlyphID   glyph;
72    LookupValue value;
73};
74
75struct BinarySearchLookupTable : LookupTable
76{
77    le_int16 unitSize;
78    le_int16 nUnits;
79    le_int16 searchRange;
80    le_int16 entrySelector;
81    le_int16 rangeShift;
82
83    const LookupSegment *lookupSegment(const LETableReference &base, const LookupSegment *segments, LEGlyphID glyph, LEErrorCode &success) const;
84
85    const LookupSingle *lookupSingle(const LETableReference &base, const LookupSingle *entries, LEGlyphID glyph, LEErrorCode &success) const;
86};
87
88struct SimpleArrayLookupTable : LookupTable
89{
90    LookupValue valueArray[ANY_NUMBER];
91};
92LE_VAR_ARRAY(SimpleArrayLookupTable, valueArray)
93
94struct SegmentSingleLookupTable : BinarySearchLookupTable
95{
96    LookupSegment segments[ANY_NUMBER];
97};
98LE_VAR_ARRAY(SegmentSingleLookupTable, segments)
99
100struct SegmentArrayLookupTable : BinarySearchLookupTable
101{
102    LookupSegment segments[ANY_NUMBER];
103};
104LE_VAR_ARRAY(SegmentArrayLookupTable, segments)
105
106struct SingleTableLookupTable : BinarySearchLookupTable
107{
108    LookupSingle entries[ANY_NUMBER];
109};
110LE_VAR_ARRAY(SingleTableLookupTable, entries)
111
112struct TrimmedArrayLookupTable : LookupTable
113{
114    TTGlyphID   firstGlyph;
115    TTGlyphID   glyphCount;
116    LookupValue valueArray[ANY_NUMBER];
117};
118LE_VAR_ARRAY(TrimmedArrayLookupTable, valueArray)
119
120U_NAMESPACE_END
121#endif
122