1/* 2 * 3 * (C) Copyright IBM Corp. 1998-2013 - All Rights Reserved 4 * 5 */ 6 7#include "LETypes.h" 8#include "MorphTables.h" 9#include "StateTables.h" 10#include "MorphStateTables.h" 11#include "SubtableProcessor.h" 12#include "StateTableProcessor.h" 13#include "LEGlyphStorage.h" 14#include "LESwaps.h" 15 16U_NAMESPACE_BEGIN 17 18StateTableProcessor::StateTableProcessor() 19{ 20} 21 22StateTableProcessor::StateTableProcessor(const LEReferenceTo<MorphSubtableHeader> &morphSubtableHeader, LEErrorCode &success) 23 : SubtableProcessor(morphSubtableHeader, success), stateTableHeader(morphSubtableHeader, success), 24 stHeader(stateTableHeader, success, (const StateTableHeader*)&stateTableHeader->stHeader) 25{ 26 if(LE_FAILURE(success)) return; 27 stateSize = SWAPW(stateTableHeader->stHeader.stateSize); 28 classTableOffset = SWAPW(stateTableHeader->stHeader.classTableOffset); 29 stateArrayOffset = SWAPW(stateTableHeader->stHeader.stateArrayOffset); 30 entryTableOffset = SWAPW(stateTableHeader->stHeader.entryTableOffset); 31 32 classTable = LEReferenceTo<ClassTable>(stateTableHeader, success, ((char *) &stateTableHeader->stHeader + classTableOffset)); 33 if(LE_FAILURE(success)) return; 34 firstGlyph = SWAPW(classTable->firstGlyph); 35 lastGlyph = firstGlyph + SWAPW(classTable->nGlyphs); 36} 37 38StateTableProcessor::~StateTableProcessor() 39{ 40} 41 42void StateTableProcessor::process(LEGlyphStorage &glyphStorage, LEErrorCode &success) 43{ 44 if (LE_FAILURE(success)) return; 45 LE_STATE_PATIENCE_INIT(); 46 47 // Start at state 0 48 // XXX: How do we know when to start at state 1? 49 ByteOffset currentState = stateArrayOffset; 50 51 // XXX: reverse? 52 le_int32 currGlyph = 0; 53 le_int32 glyphCount = glyphStorage.getGlyphCount(); 54 55 beginStateTable(); 56 57 while (currGlyph <= glyphCount) { 58 if(LE_STATE_PATIENCE_DECR()) break; // patience exceeded. 59 ClassCode classCode = classCodeOOB; 60 if (currGlyph == glyphCount) { 61 // XXX: How do we handle EOT vs. EOL? 62 classCode = classCodeEOT; 63 } else { 64 TTGlyphID glyphCode = (TTGlyphID) LE_GET_GLYPH(glyphStorage[currGlyph]); 65 66 if (glyphCode == 0xFFFF) { 67 classCode = classCodeDEL; 68 } else if ((glyphCode >= firstGlyph) && (glyphCode < lastGlyph)) { 69 classCode = classTable->classArray[glyphCode - firstGlyph]; 70 } 71 } 72 73 LEReferenceToArrayOf<EntryTableIndex> stateArray(stHeader, success, currentState, LE_UNBOUNDED_ARRAY); 74 EntryTableIndex entryTableIndex = stateArray.getObject((le_uint8)classCode, success); 75 LE_STATE_PATIENCE_CURR(le_int32, currGlyph); 76 currentState = processStateEntry(glyphStorage, currGlyph, entryTableIndex); 77 LE_STATE_PATIENCE_INCR(currGlyph); 78 } 79 80 endStateTable(); 81} 82 83U_NAMESPACE_END 84