Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / whidbey / netfxsp / ndp / fx / src / Xml / System / Xml / schema / BitSet.cs / 1 / BitSet.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //----------------------------------------------------------------------------- namespace System.Xml.Schema { using System.Text; using System.Diagnostics; internal sealed class BitSet { private const int bitSlotShift = 5; private const int bitSlotMask = (1 << bitSlotShift) - 1; private int count; private uint[] bits; private BitSet() { } public BitSet(int count) { this.count = count; bits = new uint[Subscript(count + bitSlotMask)]; } public int Count { get { return count; } } public bool this[int index] { get { return Get(index); } } public void Clear() { int bitsLength = bits.Length; for (int i = bitsLength; i-- > 0 ;) { bits[i] = 0; } } public void Clear(int index) { int nBitSlot = Subscript(index); EnsureLength(nBitSlot + 1); bits[nBitSlot] &= ~((uint)1 << (index & bitSlotMask)); } public void Set(int index) { int nBitSlot = Subscript(index); EnsureLength(nBitSlot + 1); bits[nBitSlot] |= (uint)1 << (index & bitSlotMask); } public bool Get(int index) { bool fResult = false; if (index < count) { int nBitSlot = Subscript(index); fResult = ((bits[nBitSlot] & (1 << (index & bitSlotMask))) != 0); } return fResult; } public int NextSet(int startFrom) { Debug.Assert(startFrom >= -1 && startFrom <= count); int offset = startFrom + 1; if (offset == count) { return -1; } int nBitSlot = Subscript(offset); offset &= bitSlotMask; uint word = bits[nBitSlot] >> offset; // locate non-empty slot while (word == 0) { if ((++ nBitSlot) == bits.Length ) { return -1; } offset = 0; word = bits[nBitSlot]; } while ((word & (uint)1) == 0) { word >>= 1; offset ++; } return (nBitSlot << bitSlotShift) + offset; } public void And(BitSet other) { /* * Need to synchronize both this and other-> * This might lead to deadlock if one thread grabs them in one order * while another thread grabs them the other order. * Use a trick from Doug Lea's book on concurrency, * somewhat complicated because BitSet overrides hashCode(). */ if (this == other) { return; } int bitsLength = bits.Length; int setLength = other.bits.Length; int n = (bitsLength > setLength) ? setLength : bitsLength; for (int i = n ; i-- > 0 ;) { bits[i] &= other.bits[i]; } for (; n < bitsLength ; n++) { bits[n] = 0; } } public void Or(BitSet other) { if (this == other) { return; } int setLength = other.bits.Length; EnsureLength(setLength); for (int i = setLength; i-- > 0 ;) { bits[i] |= other.bits[i]; } } public override int GetHashCode() { int h = 1234; for (int i = bits.Length; --i >= 0;) { h ^= (int)bits[i] * (i + 1); } return(int)((h >> 32) ^ h); } public override bool Equals(object obj) { // assume the same type if (obj != null) { if (this == obj) { return true; } BitSet other = (BitSet) obj; int bitsLength = bits.Length; int setLength = other.bits.Length; int n = (bitsLength > setLength) ? setLength : bitsLength; for (int i = n ; i-- > 0 ;) { if (bits[i] != other.bits[i]) { return false; } } if (bitsLength > n) { for (int i = bitsLength ; i-- > n ;) { if (bits[i] != 0) { return false; } } } else { for (int i = setLength ; i-- > n ;) { if (other.bits[i] != 0) { return false; } } } return true; } return false; } public BitSet Clone() { BitSet newset = new BitSet(); newset.count = count; newset.bits = (uint[])bits.Clone(); return newset; } public bool IsEmpty { get { uint k = 0; for (int i = 0; i < bits.Length; i++) { k |= bits[i]; } return k == 0; } } public bool Intersects(BitSet other) { int i = Math.Min(this.bits.Length, other.bits.Length); while (--i >= 0) { if ((this.bits[i] & other.bits[i]) != 0) { return true; } } return false; } private int Subscript(int bitIndex) { return bitIndex >> bitSlotShift; } private void EnsureLength(int nRequiredLength) { /* Doesn't need to be synchronized because it's an internal method. */ if (nRequiredLength > bits.Length) { /* Ask for larger of doubled size or required size */ int request = 2 * bits.Length; if (request < nRequiredLength) request = nRequiredLength; uint[] newBits = new uint[request]; Array.Copy(bits, newBits, bits.Length); bits = newBits; } } #if DEBUG public void Dump(StringBuilder bb) { for (int i = 0; i < count; i ++) { bb.Append( Get(i) ? "1" : "0"); } } #endif }; } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //----------------------------------------------------------------------------- namespace System.Xml.Schema { using System.Text; using System.Diagnostics; internal sealed class BitSet { private const int bitSlotShift = 5; private const int bitSlotMask = (1 << bitSlotShift) - 1; private int count; private uint[] bits; private BitSet() { } public BitSet(int count) { this.count = count; bits = new uint[Subscript(count + bitSlotMask)]; } public int Count { get { return count; } } public bool this[int index] { get { return Get(index); } } public void Clear() { int bitsLength = bits.Length; for (int i = bitsLength; i-- > 0 ;) { bits[i] = 0; } } public void Clear(int index) { int nBitSlot = Subscript(index); EnsureLength(nBitSlot + 1); bits[nBitSlot] &= ~((uint)1 << (index & bitSlotMask)); } public void Set(int index) { int nBitSlot = Subscript(index); EnsureLength(nBitSlot + 1); bits[nBitSlot] |= (uint)1 << (index & bitSlotMask); } public bool Get(int index) { bool fResult = false; if (index < count) { int nBitSlot = Subscript(index); fResult = ((bits[nBitSlot] & (1 << (index & bitSlotMask))) != 0); } return fResult; } public int NextSet(int startFrom) { Debug.Assert(startFrom >= -1 && startFrom <= count); int offset = startFrom + 1; if (offset == count) { return -1; } int nBitSlot = Subscript(offset); offset &= bitSlotMask; uint word = bits[nBitSlot] >> offset; // locate non-empty slot while (word == 0) { if ((++ nBitSlot) == bits.Length ) { return -1; } offset = 0; word = bits[nBitSlot]; } while ((word & (uint)1) == 0) { word >>= 1; offset ++; } return (nBitSlot << bitSlotShift) + offset; } public void And(BitSet other) { /* * Need to synchronize both this and other-> * This might lead to deadlock if one thread grabs them in one order * while another thread grabs them the other order. * Use a trick from Doug Lea's book on concurrency, * somewhat complicated because BitSet overrides hashCode(). */ if (this == other) { return; } int bitsLength = bits.Length; int setLength = other.bits.Length; int n = (bitsLength > setLength) ? setLength : bitsLength; for (int i = n ; i-- > 0 ;) { bits[i] &= other.bits[i]; } for (; n < bitsLength ; n++) { bits[n] = 0; } } public void Or(BitSet other) { if (this == other) { return; } int setLength = other.bits.Length; EnsureLength(setLength); for (int i = setLength; i-- > 0 ;) { bits[i] |= other.bits[i]; } } public override int GetHashCode() { int h = 1234; for (int i = bits.Length; --i >= 0;) { h ^= (int)bits[i] * (i + 1); } return(int)((h >> 32) ^ h); } public override bool Equals(object obj) { // assume the same type if (obj != null) { if (this == obj) { return true; } BitSet other = (BitSet) obj; int bitsLength = bits.Length; int setLength = other.bits.Length; int n = (bitsLength > setLength) ? setLength : bitsLength; for (int i = n ; i-- > 0 ;) { if (bits[i] != other.bits[i]) { return false; } } if (bitsLength > n) { for (int i = bitsLength ; i-- > n ;) { if (bits[i] != 0) { return false; } } } else { for (int i = setLength ; i-- > n ;) { if (other.bits[i] != 0) { return false; } } } return true; } return false; } public BitSet Clone() { BitSet newset = new BitSet(); newset.count = count; newset.bits = (uint[])bits.Clone(); return newset; } public bool IsEmpty { get { uint k = 0; for (int i = 0; i < bits.Length; i++) { k |= bits[i]; } return k == 0; } } public bool Intersects(BitSet other) { int i = Math.Min(this.bits.Length, other.bits.Length); while (--i >= 0) { if ((this.bits[i] & other.bits[i]) != 0) { return true; } } return false; } private int Subscript(int bitIndex) { return bitIndex >> bitSlotShift; } private void EnsureLength(int nRequiredLength) { /* Doesn't need to be synchronized because it's an internal method. */ if (nRequiredLength > bits.Length) { /* Ask for larger of doubled size or required size */ int request = 2 * bits.Length; if (request < nRequiredLength) request = nRequiredLength; uint[] newBits = new uint[request]; Array.Copy(bits, newBits, bits.Length); bits = newBits; } } #if DEBUG public void Dump(StringBuilder bb) { for (int i = 0; i < count; i ++) { bb.Append( Get(i) ? "1" : "0"); } } #endif }; } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- Message.cs
- WebScriptServiceHost.cs
- XPathItem.cs
- GenericEnumerator.cs
- Overlapped.cs
- Speller.cs
- ImportContext.cs
- FlowDocument.cs
- Trace.cs
- UpdatePanelTrigger.cs
- ZipIOModeEnforcingStream.cs
- HtmlTableCell.cs
- ObjectParameterCollection.cs
- XPathException.cs
- parserscommon.cs
- __Error.cs
- Rect.cs
- RefExpr.cs
- FrameSecurityDescriptor.cs
- SqlDataSourceCache.cs
- PngBitmapDecoder.cs
- LinqDataSourceHelper.cs
- MailMessageEventArgs.cs
- DelegateSerializationHolder.cs
- DesignerActionUI.cs
- IconBitmapDecoder.cs
- FlowchartSizeFeature.cs
- ListBoxChrome.cs
- BaseProcessor.cs
- PositiveTimeSpanValidatorAttribute.cs
- GridViewSelectEventArgs.cs
- WebPartMenuStyle.cs
- PackUriHelper.cs
- StructuredType.cs
- LoginDesigner.cs
- EntityAdapter.cs
- Deflater.cs
- fixedPageContentExtractor.cs
- TextAction.cs
- WindowsStatic.cs
- HitTestParameters3D.cs
- BitmapEffectGroup.cs
- AutomationIdentifierGuids.cs
- Point3DConverter.cs
- MenuItem.cs
- ServiceModelExtensionCollectionElement.cs
- PolyLineSegmentFigureLogic.cs
- HttpContext.cs
- QilReplaceVisitor.cs
- UInt64Storage.cs
- SchemaEntity.cs
- GeneralTransform.cs
- DependencyPropertyHelper.cs
- DefaultBinder.cs
- JournalEntryStack.cs
- ConvertEvent.cs
- EmptyWorkItem.cs
- ToolStripLocationCancelEventArgs.cs
- BCryptSafeHandles.cs
- LookupNode.cs
- WebPartUtil.cs
- Int64Converter.cs
- ControlUtil.cs
- XmlAttributeOverrides.cs
- IPCCacheManager.cs
- GroupBox.cs
- WMIGenerator.cs
- CurrentChangingEventManager.cs
- WebBrowser.cs
- QueryOutputWriter.cs
- control.ime.cs
- XmlSerializationGeneratedCode.cs
- ImageSource.cs
- DataListItemCollection.cs
- DbModificationCommandTree.cs
- RNGCryptoServiceProvider.cs
- SqlBulkCopy.cs
- AnonymousIdentificationModule.cs
- ImageListStreamer.cs
- SafeNativeMethods.cs
- ExtensibleSyndicationObject.cs
- Imaging.cs
- DynamicILGenerator.cs
- ObjectStorage.cs
- Utils.cs
- altserialization.cs
- DriveInfo.cs
- LexicalChunk.cs
- LinkedResource.cs
- ProfileManager.cs
- BypassElementCollection.cs
- SizeValueSerializer.cs
- SystemDiagnosticsSection.cs
- DemultiplexingClientMessageFormatter.cs
- UnsafeNativeMethods.cs
- XmlNode.cs
- EtwTrace.cs
- ConnectionStringSettingsCollection.cs
- MetadataItemEmitter.cs
- CapiSafeHandles.cs