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/*
*
* (C) Copyright IBM Corp. 1998-2013 - All Rights Reserved
*
*/
#include "LETypes.h"
#include "MorphTables.h"
#include "StateTables.h"
#include "MorphStateTables.h"
#include "SubtableProcessor.h"
#include "StateTableProcessor.h"
#include "LEGlyphStorage.h"
#include "LESwaps.h"
U_NAMESPACE_BEGIN
StateTableProcessor::StateTableProcessor()
{
}
StateTableProcessor::StateTableProcessor(const LEReferenceTo<MorphSubtableHeader> &morphSubtableHeader, LEErrorCode &success)
: SubtableProcessor(morphSubtableHeader, success), stateTableHeader(morphSubtableHeader, success),
stHeader(stateTableHeader, success, (const StateTableHeader*)&stateTableHeader->stHeader)
{
if(LE_FAILURE(success)) return;
stateSize = SWAPW(stateTableHeader->stHeader.stateSize);
classTableOffset = SWAPW(stateTableHeader->stHeader.classTableOffset);
stateArrayOffset = SWAPW(stateTableHeader->stHeader.stateArrayOffset);
entryTableOffset = SWAPW(stateTableHeader->stHeader.entryTableOffset);
classTable = LEReferenceTo<ClassTable>(stateTableHeader, success, ((char *) &stateTableHeader->stHeader + classTableOffset));
if(LE_FAILURE(success)) return;
firstGlyph = SWAPW(classTable->firstGlyph);
lastGlyph = firstGlyph + SWAPW(classTable->nGlyphs);
}
StateTableProcessor::~StateTableProcessor()
{
}
void StateTableProcessor::process(LEGlyphStorage &glyphStorage, LEErrorCode &success)
{
if (LE_FAILURE(success)) return;
LE_STATE_PATIENCE_INIT();
// Start at state 0
// XXX: How do we know when to start at state 1?
ByteOffset currentState = stateArrayOffset;
// XXX: reverse?
le_int32 currGlyph = 0;
le_int32 glyphCount = glyphStorage.getGlyphCount();
beginStateTable();
while (currGlyph <= glyphCount) {
if(LE_STATE_PATIENCE_DECR()) break; // patience exceeded.
ClassCode classCode = classCodeOOB;
if (currGlyph == glyphCount) {
// XXX: How do we handle EOT vs. EOL?
classCode = classCodeEOT;
} else {
TTGlyphID glyphCode = (TTGlyphID) LE_GET_GLYPH(glyphStorage[currGlyph]);
if (glyphCode == 0xFFFF) {
classCode = classCodeDEL;
} else if ((glyphCode >= firstGlyph) && (glyphCode < lastGlyph)) {
classCode = classTable->classArray[glyphCode - firstGlyph];
}
}
LEReferenceToArrayOf<EntryTableIndex> stateArray(stHeader, success, currentState, LE_UNBOUNDED_ARRAY);
EntryTableIndex entryTableIndex = stateArray.getObject((le_uint8)classCode, success);
LE_STATE_PATIENCE_CURR(le_int32, currGlyph);
currentState = processStateEntry(glyphStorage, currGlyph, entryTableIndex);
LE_STATE_PATIENCE_INCR(currGlyph);
}
endStateTable();
}
U_NAMESPACE_END
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