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Diffstat (limited to 'src/dotnet-library/scala/collection/immutable/BitSet.scala')
| -rw-r--r-- | src/dotnet-library/scala/collection/immutable/BitSet.scala | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/src/dotnet-library/scala/collection/immutable/BitSet.scala b/src/dotnet-library/scala/collection/immutable/BitSet.scala new file mode 100644 index 0000000000..b2d50c329f --- /dev/null +++ b/src/dotnet-library/scala/collection/immutable/BitSet.scala @@ -0,0 +1,51 @@ +/* __ *\ +** ________ ___ / / ___ Scala API ** +** / __/ __// _ | / / / _ | (c) 2003-2006, LAMP/EPFL ** +** __\ \/ /__/ __ |/ /__/ __ | ** +** /____/\___/_/ |_/____/_/ | | ** +** |/ ** +\* */ + +// $Id$ + + +package scala.collection.immutable + + +/** The class <code>BitSet</code> provides an immutable bitset view on an + * int array. Instances can conveniently be created from instances of + * Bit indices are between <code>0..(capacity-1)</code> inclusive. + * + * @param size <code>size</code> represents the number of relevant bits + * @param capacity ... + * @param ba <code>ba</code> array of ints of length + * <code>n>>>5</code> + * @param copy <code>copy</code> if yes, then <code>ba</code> is copied + * and updates will not affect this bitset + * + * @author Burak Emir, Nikolay Mihaylov + * @version 1.0 + */ + +[serializable] +/* + * This is a strange class! It claims to be immutable but is not. + * It claims to be a BitSet but it is not a Set. + * Remove it or integrate it into the Set hierarchy. + * [Comments by Martin] + */ +class BitSet(val size: Int, val capacity: Int, ba: Array[Int], copy: Boolean) + extends collection.BitSet +{ + import compat.Platform.arraycopy + + protected val arr: Array[Int] = + if (copy) { + val arr = new Array[Int](ba.length) + arraycopy(ba, 0, arr, 0, ba.length) + arr + } + else + ba + +} |