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Diffstat (limited to 'libjava/gnu/gcj/awt/BitMaskExtent.java')
-rw-r--r-- | libjava/gnu/gcj/awt/BitMaskExtent.java | 51 |
1 files changed, 0 insertions, 51 deletions
diff --git a/libjava/gnu/gcj/awt/BitMaskExtent.java b/libjava/gnu/gcj/awt/BitMaskExtent.java deleted file mode 100644 index 884ab502dc9..00000000000 --- a/libjava/gnu/gcj/awt/BitMaskExtent.java +++ /dev/null @@ -1,51 +0,0 @@ -/* Copyright (C) 2000 Free Software Foundation - - This file is part of libgcj. - -This software is copyrighted work licensed under the terms of the -Libgcj License. Please consult the file "LIBGCJ_LICENSE" for -details. */ - -package gnu.gcj.awt; - -/** - * Simple transparent utility class that can be used to perform bit - * mask extent calculations. - */ -public final class BitMaskExtent -{ - /** The number of the least significant bit of the bit mask extent. */ - public byte leastSignificantBit; - - /** The number of bits in the bit mask extent. */ - public byte bitWidth; - - /** - * Set the bit mask. This will calculate and set the leastSignificantBit - * and bitWidth fields. - * - * @see #leastSignificantBit - * @see #bitWidth - */ - public void setMask(long mask) - { - leastSignificantBit = 0; - bitWidth = 0; - if (mask == 0) return; - long shiftMask = mask; - for (; (shiftMask&1) == 0; shiftMask >>>=1) leastSignificantBit++; - for (; (shiftMask&1) != 0; shiftMask >>>=1) bitWidth++; - - if (shiftMask != 0) - throw new IllegalArgumentException("mask must be continuous"); - } - - /** - * Calculate the bit mask based on the values of the - * leastSignificantBit and bitWidth fields. - */ - public long toMask() - { - return ((1<<bitWidth)-1) << leastSignificantBit; - } -} |