| 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 | |
| 18 | StateTableProcessor::StateTableProcessor() |
| 19 | { |
| 20 | } |
| 21 | |
| 22 | StateTableProcessor::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 | |
| 37 | StateTableProcessor::~StateTableProcessor() |
| 38 | { |
| 39 | } |
| 40 | |
| 41 | void 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 |