/*

  *

  * (C) Copyright IBM Corp. 1998-2004 - All Rights Reserved

  *

  */

 #ifndef __LOOKUPTABLES_H

 #define __LOOKUPTABLES_H

 /**

  * \file

  * \internal

  */

 #include "LETypes.h"

 #include "LayoutTables.h"

 U_NAMESPACE_BEGIN

 enum LookupTableFormat

 {

     ltfSimpleArray      = 0,

     ltfSegmentSingle    = 2,

     ltfSegmentArray     = 4,

     ltfSingleTable      = 6,

     ltfTrimmedArray     = 8

 };

 typedef le_int16 LookupValue;

 struct LookupTable

 {

     le_int16 format;

 };

 struct LookupSegment

 {

     TTGlyphID   lastGlyph;

     TTGlyphID   firstGlyph;

     LookupValue value;

 };

 struct LookupSingle

 {

     TTGlyphID   glyph;

     LookupValue value;

 };

 struct BinarySearchLookupTable : LookupTable

 {

     le_int16 unitSize;

     le_int16 nUnits;

     le_int16 searchRange;

     le_int16 entrySelector;

     le_int16 rangeShift;

     const LookupSegment *lookupSegment(const LookupSegment *segments, LEGlyphID glyph) const;

     const LookupSingle *lookupSingle(const LookupSingle *entries, LEGlyphID glyph) const;

 };

 struct SimpleArrayLookupTable : LookupTable

 {

     LookupValue valueArray[ANY_NUMBER];

 };

 struct SegmentSingleLookupTable : BinarySearchLookupTable

 {

     LookupSegment segments[ANY_NUMBER];

 };

 struct SegmentArrayLookupTable : BinarySearchLookupTable

 {

     LookupSegment segments[ANY_NUMBER];

 };

 struct SingleTableLookupTable : BinarySearchLookupTable

 {

     LookupSingle entries[ANY_NUMBER];

 };

 struct TrimmedArrayLookupTable : LookupTable

 {

     TTGlyphID   firstGlyph;

     TTGlyphID   glyphCount;

     LookupValue valueArray[ANY_NUMBER];

 };

 U_NAMESPACE_END

 #endif