1/*
2 *
3 * (C) Copyright IBM Corp. 1998-2013 - All Rights Reserved
4 *
5 */
6
7#include "LETypes.h"
8#include "MorphTables.h"
9#include "StateTables.h"
10#include "MorphStateTables.h"
11#include "SubtableProcessor.h"
12#include "StateTableProcessor.h"
13#include "LEGlyphStorage.h"
14#include "LESwaps.h"
15
16U_NAMESPACE_BEGIN
17
18StateTableProcessor::StateTableProcessor()
19{
20}
21
22StateTableProcessor::StateTableProcessor(const LEReferenceTo<MorphSubtableHeader> &morphSubtableHeader, LEErrorCode &success)
23  : SubtableProcessor(morphSubtableHeader, success), stateTableHeader(morphSubtableHeader, success),
24    stHeader(stateTableHeader, success, (const StateTableHeader*)&stateTableHeader->stHeader)
25{
26  if(LE_FAILURE(success)) return;
27    stateSize = SWAPW(stateTableHeader->stHeader.stateSize);
28    classTableOffset = SWAPW(stateTableHeader->stHeader.classTableOffset);
29    stateArrayOffset = SWAPW(stateTableHeader->stHeader.stateArrayOffset);
30    entryTableOffset = SWAPW(stateTableHeader->stHeader.entryTableOffset);
31
32    classTable = LEReferenceTo<ClassTable>(stateTableHeader, success, ((char *) &stateTableHeader->stHeader + classTableOffset));
33  if(LE_FAILURE(success)) return;
34    firstGlyph = SWAPW(classTable->firstGlyph);
35    lastGlyph  = firstGlyph + SWAPW(classTable->nGlyphs);
36}
37
38StateTableProcessor::~StateTableProcessor()
39{
40}
41
42void StateTableProcessor::process(LEGlyphStorage &glyphStorage, LEErrorCode &success)
43{
44    if (LE_FAILURE(success)) return;
45    LE_STATE_PATIENCE_INIT();
46
47    // Start at state 0
48    // XXX: How do we know when to start at state 1?
49    ByteOffset currentState = stateArrayOffset;
50
51    // XXX: reverse?
52    le_int32 currGlyph = 0;
53    le_int32 glyphCount = glyphStorage.getGlyphCount();
54
55    beginStateTable();
56
57    while (currGlyph <= glyphCount) {
58        if(LE_STATE_PATIENCE_DECR()) break; // patience exceeded.
59        ClassCode classCode = classCodeOOB;
60        if (currGlyph == glyphCount) {
61            // XXX: How do we handle EOT vs. EOL?
62            classCode = classCodeEOT;
63        } else {
64            TTGlyphID glyphCode = (TTGlyphID) LE_GET_GLYPH(glyphStorage[currGlyph]);
65
66            if (glyphCode == 0xFFFF) {
67                classCode = classCodeDEL;
68            } else if ((glyphCode >= firstGlyph) && (glyphCode < lastGlyph)) {
69                classCode = classTable->classArray[glyphCode - firstGlyph];
70            }
71        }
72
73        LEReferenceToArrayOf<EntryTableIndex> stateArray(stHeader, success, currentState, LE_UNBOUNDED_ARRAY);
74        EntryTableIndex entryTableIndex = stateArray.getObject((le_uint8)classCode, success);
75        LE_STATE_PATIENCE_CURR(le_int32, currGlyph);
76        currentState = processStateEntry(glyphStorage, currGlyph, entryTableIndex);
77        LE_STATE_PATIENCE_INCR(currGlyph);
78    }
79
80    endStateTable();
81}
82
83U_NAMESPACE_END
84