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 *
29 * (C) Copyright IBM Corp. 1998-2003 - All Rights Reserved
30 *
31 */
32
33#include "LETypes.h"
34#include "OpenTypeUtilities.h"
35#include "OpenTypeTables.h"
36#include "ICUFeatures.h"
37#include "LESwaps.h"
38
39U_NAMESPACE_BEGIN
40
41LEReferenceTo<FeatureTable> FeatureListTable::getFeatureTable(const LETableReference &base, le_uint16 featureIndex, LETag *featureTag, LEErrorCode &success) const
42{
43    LEReferenceToArrayOf<FeatureRecord>
44        featureRecordArrayRef(base, success, featureRecordArray, SWAPW(featureCount));
45
46    if (featureIndex >= SWAPW(featureCount) || LE_FAILURE(success)) {
47        success = LE_INDEX_OUT_OF_BOUNDS_ERROR;
48        return LEReferenceTo<FeatureTable>();
49    }
50
51    Offset featureTableOffset = featureRecordArray[featureIndex].featureTableOffset;
52
53    *featureTag = SWAPT(featureRecordArray[featureIndex].featureTag);
54
55    return LEReferenceTo<FeatureTable>(base, success, SWAPW(featureTableOffset));
56}
57
58#if 0
59/*
60 * Note: according to the OpenType Spec. v 1.4, the entries in the Feature
61 * List Table are sorted alphabetically by feature tag; however, there seem
62 * to be some fonts which have an unsorted list; that's why the binary search
63 * is #if 0'd out and replaced by a linear search.
64 *
65 * Also note: as of ICU 2.6, this method isn't called anyhow...
66 */
67const FeatureTable *FeatureListTable::getFeatureTable(LETag featureTag) const
68{
69#if 0
70    Offset featureTableOffset =
71        OpenTypeUtilities::getTagOffset(featureTag, (TagAndOffsetRecord *) featureRecordArray, SWAPW(featureCount));
72
73    if (featureTableOffset == 0) {
74        return 0;
75    }
76
77    return (const FeatureTable *) ((char *) this + SWAPW(featureTableOffset));
78#else
79    int count = SWAPW(featureCount);
80
81    for (int i = 0; i < count; i += 1) {
82        if (SWAPT(featureRecordArray[i].featureTag) == featureTag) {
83            return (const FeatureTable *) ((char *) this + SWAPW(featureRecordArray[i].featureTableOffset));
84        }
85    }
86
87    return 0;
88#endif
89}
90#endif
91
92U_NAMESPACE_END
93