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--- src/core/CLucene/util/BitSet.cpp.orig 2011-03-16 20:21:07.000000000 -0400
+++ src/core/CLucene/util/BitSet.cpp 2013-03-29 17:57:05.000000000 -0400
@@ -32,6 +32,25 @@
3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7,
4, 5, 5, 6, 5, 6, 6, 7, 5, 6, 6, 7, 6, 7, 7, 8};
+const uint8_t BitSet::BYTE_OFFSETS[256] = {
+ 8, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
+ 4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
+ 5, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
+ 4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
+ 6, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
+ 4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
+ 5, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
+ 4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
+ 7, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
+ 4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
+ 5, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
+ 4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
+ 6, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
+ 4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
+ 5, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
+ 4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0};
+
+
BitSet::BitSet( const BitSet& copy ) :
_size( copy._size ),
_count(-1)
@@ -180,19 +199,32 @@
return factor * (4 + (8+40)*count()) < size();
}
- int32_t BitSet::nextSetBit(int32_t fromIndex) const {
+ int32_t BitSet::nextSetBit(int32_t fromIndex) const
+ {
if (fromIndex < 0)
_CLTHROWT(CL_ERR_IndexOutOfBounds, _T("fromIndex < 0"));
if (fromIndex >= _size)
return -1;
- while (true) {
- if ((bits[fromIndex >> 3] & (1 << (fromIndex & 7))) != 0)
- return fromIndex;
- if (++fromIndex == _size)
- return -1;
+ int _max = ( _size+7 ) >> 3;
+
+ unsigned int i = (int)( fromIndex>>3 );
+ unsigned int subIndex = fromIndex & 0x7; // index within the byte
+ uint8_t byte = bits[i] >> subIndex; // skip all the bits to the right of index
+
+ if ( byte != 0 )
+ {
+ return ( ( i<<3 ) + subIndex + BYTE_OFFSETS[ byte ] );
+ }
+
+ while( ++i < _max )
+ {
+ byte = bits[i];
+ if ( byte != 0 )
+ return ( ( i<<3 ) + BYTE_OFFSETS[ byte ] );
}
+ return -1;
}
CL_NS_END