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Viewing changes to source/layout/StateTableProcessor.cpp

  • Committer: Package Import Robot
  • Author(s): Yves Arrouye
  • Date: 2002-03-03 15:31:13 UTC
  • Revision ID: package-import@ubuntu.com-20020303153113-3ssceqlq45xbmbnc
Tags: upstream-2.0-2.1pre20020303
Import upstream version 2.0-2.1pre20020303

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source/layout/StateTableProcessor.cpp
 
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/*
 
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 * @(#)StateTableProcessor.cpp  1.6 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 "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(LEGlyphID *glyphs, le_int32 *charIndices, le_int32 glyphCount)
 
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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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    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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            LEGlyphID glyphCode = glyphs[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(glyphs, charIndices, currGlyph, glyphCount, entryTableIndex);
 
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    }
 
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    endStateTable();
 
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}
 
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U_NAMESPACE_END