75 lines
1.9 KiB
C#
75 lines
1.9 KiB
C#
//-----------------------------------------------------------------------------
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//
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// Copyright (c) Microsoft. All rights reserved.
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// This code is licensed under the Microsoft Public License.
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// THIS CODE IS PROVIDED *AS IS* WITHOUT WARRANTY OF
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// ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING ANY
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// IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR
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// PURPOSE, MERCHANTABILITY, OR NON-INFRINGEMENT.
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//
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//-----------------------------------------------------------------------------
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using System;
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namespace Microsoft.Cci.Pdb {
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internal struct BitSet {
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internal BitSet(BitAccess bits) {
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bits.ReadInt32(out size); // 0..3 : Number of words
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words = new uint[size];
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bits.ReadUInt32(words);
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}
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//internal BitSet(int size) {
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// this.size = size;
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// words = new uint[size];
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//}
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internal bool IsSet(int index) {
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int word = index / 32;
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if (word >= this.size) return false;
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return ((words[word] & GetBit(index)) != 0);
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}
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//internal void Set(int index) {
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// int word = index / 32;
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// if (word >= this.size) return;
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// words[word] |= GetBit(index);
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//}
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//internal void Clear(int index) {
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// int word = index / 32;
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// if (word >= this.size) return;
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// words[word] &= ~GetBit(index);
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//}
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private static uint GetBit(int index) {
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return ((uint)1 << (index % 32));
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}
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//private static uint ReverseBits(uint value) {
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// uint o = 0;
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// for (int i = 0; i < 32; i++) {
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// o = (o << 1) | (value & 1);
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// value >>= 1;
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// }
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// return o;
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//}
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internal bool IsEmpty {
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get { return size == 0; }
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}
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//internal bool GetWord(int index, out uint word) {
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// if (index < size) {
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// word = ReverseBits(words[index]);
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// return true;
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// }
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// word = 0;
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// return false;
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//}
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private int size;
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private uint[] words;
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}
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}
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