62 lines
1.7 KiB
C++
62 lines
1.7 KiB
C++
/*
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* @(#)Features.cpp 1.4 00/03/15
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*
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* (C) Copyright IBM Corp. 1998-2003 - All Rights Reserved
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*
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*/
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#include "LETypes.h"
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#include "OpenTypeUtilities.h"
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#include "OpenTypeTables.h"
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#include "Features.h"
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#include "LESwaps.h"
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U_NAMESPACE_BEGIN
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const FeatureTable *FeatureListTable::getFeatureTable(le_uint16 featureIndex, LETag *featureTag) const
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{
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if (featureIndex >= SWAPW(featureCount)) {
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return 0;
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}
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Offset featureTableOffset = featureRecordArray[featureIndex].featureTableOffset;
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*featureTag = SWAPT(featureRecordArray[featureIndex].featureTag);
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return (const FeatureTable *) ((char *) this + SWAPW(featureTableOffset));
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}
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/*
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* Note: according to the OpenType Spec. v 1.4, the entries in the Feature
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* List Table are sorted alphabetically by feature tag; however, there seem
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* to be some fonts which have an unsorted list; that's why the binary search
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* is #if 0'd out and replaced by a linear search.
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*
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* Also note: as of ICU 2.6, this method isn't called anyhow...
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*/
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const FeatureTable *FeatureListTable::getFeatureTable(LETag featureTag) const
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{
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#if 0
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Offset featureTableOffset =
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OpenTypeUtilities::getTagOffset(featureTag, (TagAndOffsetRecord *) featureRecordArray, SWAPW(featureCount));
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if (featureTableOffset == 0) {
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return 0;
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}
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return (const FeatureTable *) ((char *) this + SWAPW(featureTableOffset));
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#else
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int count = SWAPW(featureCount);
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for (int i = 0; i < count; i += 1) {
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if (SWAPT(featureRecordArray[i].featureTag) == featureTag) {
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return (const FeatureTable *) ((char *) this + SWAPW(featureRecordArray[i].featureTableOffset));
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}
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}
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return 0;
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#endif
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}
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U_NAMESPACE_END
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