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#include "LETypes.h"
33#include "MorphTables.h"
34#include "StateTables.h"
35#include "MorphStateTables.h"
36#include "SubtableProcessor.h"
37#include "StateTableProcessor.h"
38#include "LEGlyphStorage.h"
39#include "LESwaps.h"
40
41U_NAMESPACE_BEGIN
42
43StateTableProcessor::StateTableProcessor()
44{
45}
46
47StateTableProcessor::StateTableProcessor(const LEReferenceTo<MorphSubtableHeader> &morphSubtableHeader, LEErrorCode &success)
48  : SubtableProcessor(morphSubtableHeader, success), stateTableHeader(morphSubtableHeader, success),
49    stHeader(stateTableHeader, success, (const StateTableHeader*)&stateTableHeader->stHeader)
50{
51  if(LE_FAILURE(success)) return;
52    stateSize = SWAPW(stateTableHeader->stHeader.stateSize);
53    classTableOffset = SWAPW(stateTableHeader->stHeader.classTableOffset);
54    stateArrayOffset = SWAPW(stateTableHeader->stHeader.stateArrayOffset);
55    entryTableOffset = SWAPW(stateTableHeader->stHeader.entryTableOffset);
56
57    classTable = LEReferenceTo<ClassTable>(stateTableHeader, success, ((char *) &stateTableHeader->stHeader + classTableOffset));
58  if(LE_FAILURE(success)) return;
59    firstGlyph = SWAPW(classTable->firstGlyph);
60    lastGlyph  = firstGlyph + SWAPW(classTable->nGlyphs);
61}
62
63StateTableProcessor::~StateTableProcessor()
64{
65}
66
67void StateTableProcessor::process(LEGlyphStorage &glyphStorage, LEErrorCode &success)
68{
69    if (LE_FAILURE(success)) return;
70    LE_STATE_PATIENCE_INIT();
71
72    // Start at state 0
73    // XXX: How do we know when to start at state 1?
74    ByteOffset currentState = stateArrayOffset;
75
76    // XXX: reverse?
77    le_int32 currGlyph = 0;
78    le_int32 glyphCount = glyphStorage.getGlyphCount();
79
80    beginStateTable();
81
82    while (currGlyph <= glyphCount) {
83        if(LE_STATE_PATIENCE_DECR()) break; // patience exceeded.
84        if (LE_FAILURE(success)) break;
85        ClassCode classCode = classCodeOOB;
86        if (currGlyph == glyphCount) {
87            // XXX: How do we handle EOT vs. EOL?
88            classCode = classCodeEOT;
89            break;
90        } else {
91            TTGlyphID glyphCode = (TTGlyphID) LE_GET_GLYPH(glyphStorage[currGlyph]);
92
93            if (glyphCode == 0xFFFF) {
94                classCode = classCodeDEL;
95            } else if ((glyphCode >= firstGlyph) && (glyphCode < lastGlyph)) {
96                classCode = classTable->classArray[glyphCode - firstGlyph];
97            }
98        }
99
100        LEReferenceToArrayOf<EntryTableIndex> stateArray(stHeader, success, currentState, LE_UNBOUNDED_ARRAY);
101        EntryTableIndex entryTableIndex = stateArray.getObject((le_uint8)classCode, success);
102        if (LE_FAILURE(success)) { break; }
103        LE_STATE_PATIENCE_CURR(le_int32, currGlyph);
104        currentState = processStateEntry(glyphStorage, currGlyph, entryTableIndex, success);
105        LE_STATE_PATIENCE_INCR(currGlyph);
106    }
107
108    endStateTable();
109}
110
111U_NAMESPACE_END
112