1 /* 2 * 3 * (C) Copyright IBM Corp. 1998-2004 - 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 16 U_NAMESPACE_BEGIN 17 StateTableProcessor()18StateTableProcessor::StateTableProcessor() 19 { 20 } 21 StateTableProcessor(const MorphSubtableHeader * morphSubtableHeader)22StateTableProcessor::StateTableProcessor(const MorphSubtableHeader *morphSubtableHeader) 23 : SubtableProcessor(morphSubtableHeader) 24 { 25 stateTableHeader = (const MorphStateTableHeader *) morphSubtableHeader; 26 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 = (const ClassTable *) ((char *) &stateTableHeader->stHeader + classTableOffset); 33 firstGlyph = SWAPW(classTable->firstGlyph); 34 lastGlyph = firstGlyph + SWAPW(classTable->nGlyphs); 35 } 36 ~StateTableProcessor()37StateTableProcessor::~StateTableProcessor() 38 { 39 } 40 process(LEGlyphStorage & glyphStorage)41void StateTableProcessor::process(LEGlyphStorage &glyphStorage) 42 { 43 // Start at state 0 44 // XXX: How do we know when to start at state 1? 45 ByteOffset currentState = stateArrayOffset; 46 47 // XXX: reverse? 48 le_int32 currGlyph = 0; 49 le_int32 glyphCount = glyphStorage.getGlyphCount(); 50 51 beginStateTable(); 52 53 while (currGlyph <= glyphCount) { 54 ClassCode classCode = classCodeOOB; 55 if (currGlyph == glyphCount) { 56 // XXX: How do we handle EOT vs. EOL? 57 classCode = classCodeEOT; 58 } else { 59 TTGlyphID glyphCode = (TTGlyphID) LE_GET_GLYPH(glyphStorage[currGlyph]); 60 61 if (glyphCode == 0xFFFF) { 62 classCode = classCodeDEL; 63 } else if ((glyphCode >= firstGlyph) && (glyphCode < lastGlyph)) { 64 classCode = classTable->classArray[glyphCode - firstGlyph]; 65 } 66 } 67 68 const EntryTableIndex *stateArray = (const EntryTableIndex *) ((char *) &stateTableHeader->stHeader + currentState); 69 EntryTableIndex entryTableIndex = stateArray[(le_uint8)classCode]; 70 71 currentState = processStateEntry(glyphStorage, currGlyph, entryTableIndex); 72 } 73 74 endStateTable(); 75 } 76 77 U_NAMESPACE_END 78