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/*
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*
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* (C) Copyright IBM Corp. 1998-2004 - All Rights Reserved
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*
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*/
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#include "LETypes.h"
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#include "MorphTables.h"
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#include "StateTables.h"
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#include "MorphStateTables.h"
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#include "SubtableProcessor.h"
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#include "StateTableProcessor.h"
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#include "LEGlyphStorage.h"
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#include "LESwaps.h"
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U_NAMESPACE_BEGIN
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StateTableProcessor::StateTableProcessor()
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{
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}
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StateTableProcessor::StateTableProcessor(const MorphSubtableHeader *morphSubtableHeader)
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: SubtableProcessor(morphSubtableHeader)
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{
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stateTableHeader = (const MorphStateTableHeader *) morphSubtableHeader;
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stateSize = SWAPW(stateTableHeader->stHeader.stateSize);
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classTableOffset = SWAPW(stateTableHeader->stHeader.classTableOffset);
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stateArrayOffset = SWAPW(stateTableHeader->stHeader.stateArrayOffset);
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entryTableOffset = SWAPW(stateTableHeader->stHeader.entryTableOffset);
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classTable = (const ClassTable *) ((char *) &stateTableHeader->stHeader + classTableOffset);
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firstGlyph = SWAPW(classTable->firstGlyph);
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lastGlyph = firstGlyph + SWAPW(classTable->nGlyphs);
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}
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StateTableProcessor::~StateTableProcessor()
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{
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}
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void StateTableProcessor::process(LEGlyphStorage &glyphStorage)
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{
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// Start at state 0
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// XXX: How do we know when to start at state 1?
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ByteOffset currentState = stateArrayOffset;
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// XXX: reverse?
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le_int32 currGlyph = 0;
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le_int32 glyphCount = glyphStorage.getGlyphCount();
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beginStateTable();
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while (currGlyph <= glyphCount) {
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ClassCode classCode = classCodeOOB;
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if (currGlyph == glyphCount) {
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// XXX: How do we handle EOT vs. EOL?
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classCode = classCodeEOT;
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} else {
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TTGlyphID glyphCode = (TTGlyphID) LE_GET_GLYPH(glyphStorage[currGlyph]);
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if (glyphCode == 0xFFFF) {
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classCode = classCodeDEL;
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} else if ((glyphCode >= firstGlyph) && (glyphCode < lastGlyph)) {
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classCode = classTable->classArray[glyphCode - firstGlyph];
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}
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}
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const EntryTableIndex *stateArray = (const EntryTableIndex *) ((char *) &stateTableHeader->stHeader + currentState);
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EntryTableIndex entryTableIndex = stateArray[(le_uint8)classCode];
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currentState = processStateEntry(glyphStorage, currGlyph, entryTableIndex);
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}
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endStateTable();
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}
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U_NAMESPACE_END
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