378 lines
9.7 KiB
C++
378 lines
9.7 KiB
C++
/*
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* @(#)IndicRearrangementProcessor.cpp 1.7 00/03/15
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*
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* (C) Copyright IBM Corp. 1998, 1999, 2000, 2001 - 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 "IndicRearrangementProcessor.h"
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#include "LESwaps.h"
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U_NAMESPACE_BEGIN
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IndicRearrangementProcessor::IndicRearrangementProcessor(const MorphSubtableHeader *morphSubtableHeader)
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: StateTableProcessor(morphSubtableHeader)
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{
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indicRearrangementSubtableHeader = (const IndicRearrangementSubtableHeader *) morphSubtableHeader;
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entryTable = (const IndicRearrangementStateEntry *) ((char *) &stateTableHeader->stHeader + entryTableOffset);
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}
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IndicRearrangementProcessor::~IndicRearrangementProcessor()
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{
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}
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void IndicRearrangementProcessor::beginStateTable()
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{
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firstGlyph = 0;
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lastGlyph = 0;
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}
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ByteOffset IndicRearrangementProcessor::processStateEntry(LEGlyphID *glyphs, le_int32 *charIndices, le_int32 &currGlyph,
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le_int32 glyphCount, EntryTableIndex index)
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{
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const IndicRearrangementStateEntry *entry = &entryTable[index];
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ByteOffset newState = SWAPW(entry->newStateOffset);
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IndicRearrangementFlags flags = (IndicRearrangementFlags) SWAPW(entry->flags);
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if (flags & irfMarkFirst) {
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firstGlyph = currGlyph;
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}
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if (flags & irfMarkLast) {
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lastGlyph = currGlyph;
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}
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doRearrangementAction(glyphs, charIndices, (IndicRearrangementVerb) (flags & irfVerbMask));
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if (!(flags & irfDontAdvance)) {
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// XXX: Should handle reverse too...
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currGlyph += 1;
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}
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return newState;
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}
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void IndicRearrangementProcessor::endStateTable()
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{
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}
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void IndicRearrangementProcessor::doRearrangementAction(LEGlyphID *glyphs, le_int32 *charIndices, IndicRearrangementVerb verb) const
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{
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LEGlyphID a, b, c, d;
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le_int32 ia, ib, ic, id, x;
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switch(verb)
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{
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case irvNoAction:
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break;
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case irvxA:
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a = glyphs[firstGlyph];
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ia = charIndices[firstGlyph];
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x = firstGlyph + 1;
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while (x <= lastGlyph) {
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glyphs[x - 1] = glyphs[x];
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charIndices[x - 1] = charIndices[x];
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x += 1;
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}
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glyphs[lastGlyph] = a;
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charIndices[lastGlyph] = ia;
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break;
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case irvDx:
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d = glyphs[lastGlyph];
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id = charIndices[lastGlyph];
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x = lastGlyph - 1;
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while (x >= firstGlyph) {
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glyphs[x + 1] = glyphs[x];
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charIndices[x + 1] = charIndices[x];
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x -= 1;
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}
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glyphs[firstGlyph] = d;
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charIndices[firstGlyph] = id;
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break;
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case irvDxA:
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a = glyphs[firstGlyph];
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ia = charIndices[firstGlyph];
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glyphs[firstGlyph] = glyphs[lastGlyph];
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glyphs[lastGlyph] = a;
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charIndices[firstGlyph] = charIndices[lastGlyph];
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charIndices[lastGlyph] = ia;
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break;
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case irvxAB:
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a = glyphs[firstGlyph];
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b = glyphs[firstGlyph + 1];
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ia = charIndices[firstGlyph];
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ib = charIndices[firstGlyph + 1];
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x = firstGlyph + 2;
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while (x <= lastGlyph) {
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glyphs[x - 2] = glyphs[x];
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charIndices[x - 2] = charIndices[x];
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x += 1;
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}
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glyphs[lastGlyph - 1] = a;
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glyphs[lastGlyph] = b;
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charIndices[lastGlyph - 1] = ia;
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charIndices[lastGlyph] = ib;
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break;
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case irvxBA:
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a = glyphs[firstGlyph];
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b = glyphs[firstGlyph + 1];
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ia = charIndices[firstGlyph];
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ib = charIndices[firstGlyph + 1];
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x = firstGlyph + 2;
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while (x <= lastGlyph) {
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glyphs[x - 2] = glyphs[x];
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charIndices[x - 2] = charIndices[x];
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x += 1;
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}
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glyphs[lastGlyph - 1] = b;
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glyphs[lastGlyph] = a;
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charIndices[lastGlyph - 1] = ib;
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charIndices[lastGlyph] = ia;
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break;
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case irvCDx:
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c = glyphs[lastGlyph - 1];
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d = glyphs[lastGlyph];
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ic = charIndices[lastGlyph - 1];
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id = charIndices[lastGlyph];
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x = lastGlyph - 2;
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while (x >= lastGlyph) {
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glyphs[x + 2] = glyphs[x];
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charIndices[x + 2] = charIndices[x];
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x -= 1;
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}
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glyphs[firstGlyph] = c;
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glyphs[firstGlyph + 1] = d;
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charIndices[firstGlyph] = ic;
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charIndices[firstGlyph + 1] = id;
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break;
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case irvDCx:
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c = glyphs[lastGlyph - 1];
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d = glyphs[lastGlyph];
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ic = charIndices[lastGlyph - 1];
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id = charIndices[lastGlyph];
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x = lastGlyph - 2;
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while (x >= lastGlyph) {
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glyphs[x + 2] = glyphs[x];
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charIndices[x + 2] = charIndices[x];
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x -= 1;
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}
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glyphs[firstGlyph] = d;
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glyphs[firstGlyph + 1] = c;
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charIndices[firstGlyph] = id;
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charIndices[firstGlyph + 1] = ic;
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break;
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case irvCDxA:
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a = glyphs[firstGlyph];
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c = glyphs[lastGlyph - 1];
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d = glyphs[lastGlyph];
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ia = charIndices[firstGlyph];
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ic = charIndices[lastGlyph - 1];
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id = charIndices[lastGlyph];
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x = lastGlyph - 2;
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while (x > firstGlyph) {
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glyphs[x + 1] = glyphs[x];
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charIndices[x + 1] = charIndices[x];
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x -= 1;
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}
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glyphs[firstGlyph] = c;
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glyphs[firstGlyph + 1] = d;
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glyphs[lastGlyph] = a;
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charIndices[firstGlyph] = ic;
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charIndices[firstGlyph + 1] = id;
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charIndices[lastGlyph] = ia;
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break;
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case irvDCxA:
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a = glyphs[firstGlyph];
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c = glyphs[lastGlyph - 1];
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d = glyphs[lastGlyph];
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ia = charIndices[firstGlyph];
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ic = charIndices[lastGlyph - 1];
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id = charIndices[lastGlyph];
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x = lastGlyph - 2;
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while (x > firstGlyph) {
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glyphs[x + 1] = glyphs[x];
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charIndices[x + 1] = charIndices[x];
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x -= 1;
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}
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glyphs[firstGlyph] = d;
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glyphs[firstGlyph + 1] = c;
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glyphs[lastGlyph] = a;
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charIndices[firstGlyph] = id;
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charIndices[firstGlyph + 1] = ic;
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charIndices[lastGlyph] = ia;
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break;
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case irvDxAB:
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a = glyphs[firstGlyph];
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b = glyphs[firstGlyph + 1];
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d = glyphs[lastGlyph];
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ia = charIndices[firstGlyph];
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ib = charIndices[firstGlyph + 1];
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id = charIndices[lastGlyph];
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x = firstGlyph + 2;
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while (x < lastGlyph) {
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glyphs[x - 2] = glyphs[x];
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charIndices[x - 2] = charIndices[x];
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x += 1;
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}
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glyphs[firstGlyph] = d;
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glyphs[lastGlyph - 1] = a;
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glyphs[lastGlyph] = b;
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charIndices[firstGlyph] = id;
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charIndices[lastGlyph - 1] = ia;
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charIndices[lastGlyph] = ib;
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break;
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case irvDxBA:
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a = glyphs[firstGlyph];
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b = glyphs[firstGlyph + 1];
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d = glyphs[lastGlyph];
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ia = charIndices[firstGlyph];
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ib = charIndices[firstGlyph + 1];
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id = charIndices[lastGlyph];
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x = firstGlyph + 2;
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while (x < lastGlyph) {
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glyphs[x - 2] = glyphs[x];
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charIndices[x - 2] = charIndices[x];
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x += 1;
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}
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glyphs[firstGlyph] = d;
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glyphs[lastGlyph - 1] = b;
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glyphs[lastGlyph] = a;
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charIndices[firstGlyph] = id;
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charIndices[lastGlyph - 1] = ib;
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charIndices[lastGlyph] = ia;
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break;
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case irvCDxAB:
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a = glyphs[firstGlyph];
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b = glyphs[firstGlyph + 1];
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glyphs[firstGlyph] = glyphs[lastGlyph - 1];
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glyphs[firstGlyph + 1] = glyphs[lastGlyph];
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glyphs[lastGlyph - 1] = a;
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glyphs[lastGlyph] = b;
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ia = charIndices[firstGlyph];
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ib = charIndices[firstGlyph + 1];
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charIndices[firstGlyph] = charIndices[lastGlyph - 1];
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charIndices[firstGlyph + 1] = charIndices[lastGlyph];
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charIndices[lastGlyph - 1] = ia;
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charIndices[lastGlyph] = ib;
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break;
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case irvCDxBA:
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a = glyphs[firstGlyph];
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b = glyphs[firstGlyph + 1];
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glyphs[firstGlyph] = glyphs[lastGlyph - 1];
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glyphs[firstGlyph + 1] = glyphs[lastGlyph];
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glyphs[lastGlyph - 1] = b;
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glyphs[lastGlyph] = a;
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ia = charIndices[firstGlyph];
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ib = charIndices[firstGlyph + 1];
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charIndices[firstGlyph] = charIndices[lastGlyph - 1];
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charIndices[firstGlyph + 1] = charIndices[lastGlyph];
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charIndices[lastGlyph - 1] = ib;
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charIndices[lastGlyph] = ia;
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break;
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case irvDCxAB:
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a = glyphs[firstGlyph];
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b = glyphs[firstGlyph + 1];
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glyphs[firstGlyph] = glyphs[lastGlyph];
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glyphs[firstGlyph + 1] = glyphs[lastGlyph - 1];
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glyphs[lastGlyph - 1] = a;
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glyphs[lastGlyph] = b;
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ia = charIndices[firstGlyph];
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ib = charIndices[firstGlyph + 1];
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charIndices[firstGlyph] = charIndices[lastGlyph];
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charIndices[firstGlyph + 1] = charIndices[lastGlyph - 1];
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charIndices[lastGlyph - 1] = ia;
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charIndices[lastGlyph] = ib;
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break;
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case irvDCxBA:
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a = glyphs[firstGlyph];
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b = glyphs[firstGlyph + 1];
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glyphs[firstGlyph] = glyphs[lastGlyph];
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glyphs[firstGlyph + 1] = glyphs[lastGlyph - 1];
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glyphs[lastGlyph - 1] = b;
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glyphs[lastGlyph] = a;
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ia = charIndices[firstGlyph];
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ib = charIndices[firstGlyph + 1];
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charIndices[firstGlyph] = charIndices[lastGlyph];
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charIndices[firstGlyph + 1] = charIndices[lastGlyph - 1];
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charIndices[lastGlyph - 1] = ib;
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charIndices[lastGlyph] = ia;
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break;
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default:
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break;
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}
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}
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U_NAMESPACE_END
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