Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Data / System / Data / Common / UInt32Storage.cs / 1305376 / UInt32Storage.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //[....] //[....] //----------------------------------------------------------------------------- namespace System.Data.Common { using System; using System.Xml; using System.Data.SqlTypes; using System.Collections; internal sealed class UInt32Storage : DataStorage { private static readonly UInt32 defaultValue = UInt32.MinValue; private UInt32[] values; public UInt32Storage(DataColumn column) : base(column, typeof(UInt32), defaultValue) { } override public Object Aggregate(int[] records, AggregateType kind) { bool hasData = false; try { switch (kind) { case AggregateType.Sum: UInt64 sum = defaultValue; foreach (int record in records) { if (HasValue(record)) { checked { sum += (UInt64) values[record];} hasData = true; } } if (hasData) { return sum; } return NullValue; case AggregateType.Mean: Int64 meanSum = (Int64)defaultValue; int meanCount = 0; foreach (int record in records) { if (HasValue(record)) { checked { meanSum += (Int64)values[record];} meanCount++; hasData = true; } } if (hasData) { UInt32 mean; checked {mean = (UInt32)(meanSum / meanCount);} return mean; } return NullValue; case AggregateType.Var: case AggregateType.StDev: int count = 0; double var = 0.0f; double prec = 0.0f; double dsum = 0.0f; double sqrsum = 0.0f; foreach (int record in records) { if (HasValue(record)) { dsum += (double)values[record]; sqrsum += (double)values[record]*(double)values[record]; count++; } } if (count > 1) { var = ((double)count * sqrsum - (dsum * dsum)); prec = var / (dsum * dsum); // we are dealing with the risk of a cancellation error // double is guaranteed only for 15 digits so a difference // with a result less than 1e-15 should be considered as zero if ((prec < 1e-15) || (var <0)) var = 0; else var = var / (count * (count -1)); if (kind == AggregateType.StDev) { return Math.Sqrt(var); } return var; } return NullValue; case AggregateType.Min: UInt32 min = UInt32.MaxValue; for (int i = 0; i < records.Length; i++) { int record = records[i]; if (HasValue(record)) { min=Math.Min(values[record], min); hasData = true; } } if (hasData) { return min; } return NullValue; case AggregateType.Max: UInt32 max = UInt32.MinValue; for (int i = 0; i < records.Length; i++) { int record = records[i]; if (HasValue(record)) { max=Math.Max(values[record], max); hasData = true; } } if (hasData) { return max; } return NullValue; case AggregateType.First: if (records.Length > 0) { return values[records[0]]; } return null; case AggregateType.Count: count = 0; for (int i = 0; i < records.Length; i++) { if (HasValue(records[i])) count++; } return count; } } catch (OverflowException) { throw ExprException.Overflow(typeof(UInt32)); } throw ExceptionBuilder.AggregateException(kind, DataType); } override public int Compare(int recordNo1, int recordNo2) { UInt32 valueNo1 = values[recordNo1]; UInt32 valueNo2 = values[recordNo2]; if (valueNo1 == defaultValue || valueNo2 == defaultValue) { int bitCheck = CompareBits(recordNo1, recordNo2); if (0 != bitCheck) { return bitCheck; } } //return valueNo1.CompareTo(valueNo2); return(valueNo1 < valueNo2 ? -1 : (valueNo1 > valueNo2 ? 1 : 0)); // similar to UInt32.CompareTo(UInt32) } public override int CompareValueTo(int recordNo, object value) { System.Diagnostics.Debug.Assert(0 <= recordNo, "Invalid record"); System.Diagnostics.Debug.Assert(null != value, "null value"); if (NullValue == value) { return (HasValue(recordNo) ? 1 : 0); } UInt32 valueNo1 = values[recordNo]; if ((defaultValue == valueNo1) && !HasValue(recordNo)) { return -1; } return valueNo1.CompareTo((UInt32)value); //return(valueNo1 < valueNo2 ? -1 : (valueNo1 > valueNo2 ? 1 : 0)); // similar to UInt32.CompareTo(UInt32) } public override object ConvertValue(object value) { if (NullValue != value) { if (null != value) { value = ((IConvertible)value).ToUInt32(FormatProvider); } else { value = NullValue; } } return value; } override public void Copy(int recordNo1, int recordNo2) { CopyBits(recordNo1, recordNo2); values[recordNo2] = values[recordNo1]; } override public Object Get(int record) { UInt32 value = values[record]; if (!value.Equals(defaultValue)) { return value; } return GetBits(record); } override public void Set(int record, Object value) { System.Diagnostics.Debug.Assert(null != value, "null value"); if (NullValue == value) { values[record] = defaultValue; SetNullBit(record, true); } else { values[record] = ((IConvertible)value).ToUInt32(FormatProvider); SetNullBit(record, false); } } override public void SetCapacity(int capacity) { UInt32[] newValues = new UInt32[capacity]; if (null != values) { Array.Copy(values, 0, newValues, 0, Math.Min(capacity, values.Length)); } values = newValues; base.SetCapacity(capacity); } override public object ConvertXmlToObject(string s) { return XmlConvert.ToUInt32(s); } override public string ConvertObjectToXml(object value) { return XmlConvert.ToString((UInt32)value); } override protected object GetEmptyStorage(int recordCount) { return new UInt32[recordCount]; } override protected void CopyValue(int record, object store, BitArray nullbits, int storeIndex) { UInt32[] typedStore = (UInt32[]) store; typedStore[storeIndex] = values[record]; nullbits.Set(storeIndex, !HasValue(record)); } override protected void SetStorage(object store, BitArray nullbits) { values = (UInt32[]) store; SetNullStorage(nullbits); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //[....] //[....] //----------------------------------------------------------------------------- namespace System.Data.Common { using System; using System.Xml; using System.Data.SqlTypes; using System.Collections; internal sealed class UInt32Storage : DataStorage { private static readonly UInt32 defaultValue = UInt32.MinValue; private UInt32[] values; public UInt32Storage(DataColumn column) : base(column, typeof(UInt32), defaultValue) { } override public Object Aggregate(int[] records, AggregateType kind) { bool hasData = false; try { switch (kind) { case AggregateType.Sum: UInt64 sum = defaultValue; foreach (int record in records) { if (HasValue(record)) { checked { sum += (UInt64) values[record];} hasData = true; } } if (hasData) { return sum; } return NullValue; case AggregateType.Mean: Int64 meanSum = (Int64)defaultValue; int meanCount = 0; foreach (int record in records) { if (HasValue(record)) { checked { meanSum += (Int64)values[record];} meanCount++; hasData = true; } } if (hasData) { UInt32 mean; checked {mean = (UInt32)(meanSum / meanCount);} return mean; } return NullValue; case AggregateType.Var: case AggregateType.StDev: int count = 0; double var = 0.0f; double prec = 0.0f; double dsum = 0.0f; double sqrsum = 0.0f; foreach (int record in records) { if (HasValue(record)) { dsum += (double)values[record]; sqrsum += (double)values[record]*(double)values[record]; count++; } } if (count > 1) { var = ((double)count * sqrsum - (dsum * dsum)); prec = var / (dsum * dsum); // we are dealing with the risk of a cancellation error // double is guaranteed only for 15 digits so a difference // with a result less than 1e-15 should be considered as zero if ((prec < 1e-15) || (var <0)) var = 0; else var = var / (count * (count -1)); if (kind == AggregateType.StDev) { return Math.Sqrt(var); } return var; } return NullValue; case AggregateType.Min: UInt32 min = UInt32.MaxValue; for (int i = 0; i < records.Length; i++) { int record = records[i]; if (HasValue(record)) { min=Math.Min(values[record], min); hasData = true; } } if (hasData) { return min; } return NullValue; case AggregateType.Max: UInt32 max = UInt32.MinValue; for (int i = 0; i < records.Length; i++) { int record = records[i]; if (HasValue(record)) { max=Math.Max(values[record], max); hasData = true; } } if (hasData) { return max; } return NullValue; case AggregateType.First: if (records.Length > 0) { return values[records[0]]; } return null; case AggregateType.Count: count = 0; for (int i = 0; i < records.Length; i++) { if (HasValue(records[i])) count++; } return count; } } catch (OverflowException) { throw ExprException.Overflow(typeof(UInt32)); } throw ExceptionBuilder.AggregateException(kind, DataType); } override public int Compare(int recordNo1, int recordNo2) { UInt32 valueNo1 = values[recordNo1]; UInt32 valueNo2 = values[recordNo2]; if (valueNo1 == defaultValue || valueNo2 == defaultValue) { int bitCheck = CompareBits(recordNo1, recordNo2); if (0 != bitCheck) { return bitCheck; } } //return valueNo1.CompareTo(valueNo2); return(valueNo1 < valueNo2 ? -1 : (valueNo1 > valueNo2 ? 1 : 0)); // similar to UInt32.CompareTo(UInt32) } public override int CompareValueTo(int recordNo, object value) { System.Diagnostics.Debug.Assert(0 <= recordNo, "Invalid record"); System.Diagnostics.Debug.Assert(null != value, "null value"); if (NullValue == value) { return (HasValue(recordNo) ? 1 : 0); } UInt32 valueNo1 = values[recordNo]; if ((defaultValue == valueNo1) && !HasValue(recordNo)) { return -1; } return valueNo1.CompareTo((UInt32)value); //return(valueNo1 < valueNo2 ? -1 : (valueNo1 > valueNo2 ? 1 : 0)); // similar to UInt32.CompareTo(UInt32) } public override object ConvertValue(object value) { if (NullValue != value) { if (null != value) { value = ((IConvertible)value).ToUInt32(FormatProvider); } else { value = NullValue; } } return value; } override public void Copy(int recordNo1, int recordNo2) { CopyBits(recordNo1, recordNo2); values[recordNo2] = values[recordNo1]; } override public Object Get(int record) { UInt32 value = values[record]; if (!value.Equals(defaultValue)) { return value; } return GetBits(record); } override public void Set(int record, Object value) { System.Diagnostics.Debug.Assert(null != value, "null value"); if (NullValue == value) { values[record] = defaultValue; SetNullBit(record, true); } else { values[record] = ((IConvertible)value).ToUInt32(FormatProvider); SetNullBit(record, false); } } override public void SetCapacity(int capacity) { UInt32[] newValues = new UInt32[capacity]; if (null != values) { Array.Copy(values, 0, newValues, 0, Math.Min(capacity, values.Length)); } values = newValues; base.SetCapacity(capacity); } override public object ConvertXmlToObject(string s) { return XmlConvert.ToUInt32(s); } override public string ConvertObjectToXml(object value) { return XmlConvert.ToString((UInt32)value); } override protected object GetEmptyStorage(int recordCount) { return new UInt32[recordCount]; } override protected void CopyValue(int record, object store, BitArray nullbits, int storeIndex) { UInt32[] typedStore = (UInt32[]) store; typedStore[storeIndex] = values[record]; nullbits.Set(storeIndex, !HasValue(record)); } override protected void SetStorage(object store, BitArray nullbits) { values = (UInt32[]) store; SetNullStorage(nullbits); } } } // 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
- XmlSchemaCompilationSettings.cs
- ListSortDescriptionCollection.cs
- HttpRuntime.cs
- XmlCountingReader.cs
- Pen.cs
- webeventbuffer.cs
- DataMisalignedException.cs
- SafeLibraryHandle.cs
- SqlRecordBuffer.cs
- TextClipboardData.cs
- KeyNotFoundException.cs
- Tracer.cs
- PrintController.cs
- SequenceDesigner.cs
- XPathNodeInfoAtom.cs
- ContextMarshalException.cs
- TextEffect.cs
- Types.cs
- CallId.cs
- DbParameterHelper.cs
- Errors.cs
- WebPartsPersonalizationAuthorization.cs
- SectionXmlInfo.cs
- _Rfc2616CacheValidators.cs
- RootBuilder.cs
- CreateUserWizard.cs
- PathGeometry.cs
- EventWaitHandle.cs
- QilInvokeEarlyBound.cs
- cache.cs
- WindowsIdentity.cs
- TextUtf8RawTextWriter.cs
- DataGridViewCellValueEventArgs.cs
- MostlySingletonList.cs
- LambdaCompiler.Lambda.cs
- PreservationFileWriter.cs
- Size3D.cs
- ColorDialog.cs
- Constants.cs
- CompositionDesigner.cs
- ActivityPropertyReference.cs
- RotateTransform3D.cs
- HtmlToClrEventProxy.cs
- XmlAttributeCollection.cs
- IncrementalCompileAnalyzer.cs
- InstancePersistenceEvent.cs
- PresentationAppDomainManager.cs
- SourceFileBuildProvider.cs
- ConfigXmlDocument.cs
- WebPartDescription.cs
- IDispatchConstantAttribute.cs
- DataGridColumnHeadersPresenterAutomationPeer.cs
- MessageTransmitTraceRecord.cs
- DependencyPropertyHelper.cs
- Propagator.JoinPropagator.JoinPredicateVisitor.cs
- PersonalizationStateQuery.cs
- SemanticKeyElement.cs
- TextComposition.cs
- Animatable.cs
- WebRequestModulesSection.cs
- InlinedAggregationOperatorEnumerator.cs
- MachineKeySection.cs
- UTF32Encoding.cs
- assertwrapper.cs
- PeerNearMe.cs
- DataGridTablesFactory.cs
- HtmlInputFile.cs
- TextRangeAdaptor.cs
- IisTraceListener.cs
- SafeArchiveContext.cs
- ModelService.cs
- OdbcConnectionString.cs
- Transform.cs
- RelationshipEndMember.cs
- entityreference_tresulttype.cs
- AutomationPropertyInfo.cs
- FilterUserControlBase.cs
- ResourceManagerWrapper.cs
- ValidatingReaderNodeData.cs
- ArrayTypeMismatchException.cs
- Drawing.cs
- AdornerDecorator.cs
- TailPinnedEventArgs.cs
- FrameworkPropertyMetadata.cs
- NameSpaceExtractor.cs
- Overlapped.cs
- NumberEdit.cs
- ContextStaticAttribute.cs
- TransformerInfoCollection.cs
- SoundPlayerAction.cs
- TextFormatterHost.cs
- BridgeDataRecord.cs
- SoapInteropTypes.cs
- DispatchChannelSink.cs
- SqlDataSourceCommandEventArgs.cs
- LeaseManager.cs
- PixelFormatConverter.cs
- HotSpot.cs
- ConfigXmlAttribute.cs
- StorageComplexTypeMapping.cs