1 /*

     2  * @(#)Features.cpp 1.4 00/03/15

     3  *

     4  * (C) Copyright IBM Corp. 1998-2003 - All Rights Reserved

     5  *

     6  */

     7 

     8 #include "LETypes.h"

     9 #include "OpenTypeUtilities.h"

    10 #include "OpenTypeTables.h"

    11 #include "Features.h"

    12 #include "LESwaps.h"

    13 

    14 U_NAMESPACE_BEGIN

    15 

    16 const FeatureTable *FeatureListTable::getFeatureTable(le_uint16 featureIndex, LETag *featureTag) const

    17 {

    18     if (featureIndex >= SWAPW(featureCount)) {

    19         return 0;

    20     }

    21 

    22     Offset featureTableOffset = featureRecordArray[featureIndex].featureTableOffset;

    23 

    24     *featureTag = SWAPT(featureRecordArray[featureIndex].featureTag);

    25 

    26     return (const FeatureTable *) ((char *) this + SWAPW(featureTableOffset));

    27 }

    28 

    29 /*

    30  * Note: according to the OpenType Spec. v 1.4, the entries in the Feature

    31  * List Table are sorted alphabetically by feature tag; however, there seem

    32  * to be some fonts which have an unsorted list; that's why the binary search

    33  * is #if 0'd out and replaced by a linear search.

    34  *

    35  * Also note: as of ICU 2.6, this method isn't called anyhow...

    36  */

    37 const FeatureTable *FeatureListTable::getFeatureTable(LETag featureTag) const

    38 {

    39 #if 0

    40     Offset featureTableOffset =

    41         OpenTypeUtilities::getTagOffset(featureTag, (TagAndOffsetRecord *) featureRecordArray, SWAPW(featureCount));

    42 

    43     if (featureTableOffset == 0) {

    44         return 0;

    45     }

    46 

    47     return (const FeatureTable *) ((char *) this + SWAPW(featureTableOffset));

    48 #else

    49     int count = SWAPW(featureCount);

    50     

    51     for (int i = 0; i < count; i += 1) {

    52         if (SWAPT(featureRecordArray[i].featureTag) == featureTag) {

    53             return (const FeatureTable *) ((char *) this + SWAPW(featureRecordArray[i].featureTableOffset));

    54         }

    55     }

    56 

    57     return 0;

    58 #endif

    59 }

    60 

    61 U_NAMESPACE_END