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/*
* @(#)StateTableProcessor.cpp 1.6 00/03/15
*
* (C) Copyright IBM Corp. 1998, 1999, 2000, 2001 - All Rights Reserved
*
*/
#include "LETypes.h"
#include "MorphTables.h"
#include "StateTables.h"
#include "MorphStateTables.h"
#include "SubtableProcessor.h"
#include "StateTableProcessor.h"
#include "LESwaps.h"
U_NAMESPACE_BEGIN
StateTableProcessor::StateTableProcessor()
{
}
StateTableProcessor::StateTableProcessor(const MorphSubtableHeader *morphSubtableHeader)
: SubtableProcessor(morphSubtableHeader)
{
stateTableHeader = (const MorphStateTableHeader *) morphSubtableHeader;
stateSize = SWAPW(stateTableHeader->stHeader.stateSize);
classTableOffset = SWAPW(stateTableHeader->stHeader.classTableOffset);
stateArrayOffset = SWAPW(stateTableHeader->stHeader.stateArrayOffset);
entryTableOffset = SWAPW(stateTableHeader->stHeader.entryTableOffset);
classTable = (const ClassTable *) ((char *) &stateTableHeader->stHeader + classTableOffset);
firstGlyph = SWAPW(classTable->firstGlyph);
lastGlyph = firstGlyph + SWAPW(classTable->nGlyphs);
}
StateTableProcessor::~StateTableProcessor()
{
}
void StateTableProcessor::process(LEGlyphID *glyphs, le_int32 *charIndices, le_int32 glyphCount)
{
// Start at state 0
// XXX: How do we know when to start at state 1?
ByteOffset currentState = stateArrayOffset;
// XXX: reverse?
le_int32 currGlyph = 0;
beginStateTable();
while (currGlyph <= glyphCount) {
ClassCode classCode = classCodeOOB;
if (currGlyph == glyphCount) {
// XXX: How do we handle EOT vs. EOL?
classCode = classCodeEOT;
} else {
LEGlyphID glyphCode = glyphs[currGlyph];
if (glyphCode == 0xFFFF) {
classCode = classCodeDEL;
} else if ((glyphCode >= firstGlyph) && (glyphCode < lastGlyph)) {
classCode = classTable->classArray[glyphCode - firstGlyph];
}
}
const EntryTableIndex *stateArray = (const EntryTableIndex *) ((char *) &stateTableHeader->stHeader + currentState);
EntryTableIndex entryTableIndex = stateArray[(le_uint8)classCode];
currentState = processStateEntry(glyphs, charIndices, currGlyph, glyphCount, entryTableIndex);
}
endStateTable();
}
U_NAMESPACE_END
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