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
- CodeConditionStatement.cs
- DelimitedListTraceListener.cs
- ProxyHelper.cs
- PropertyPushdownHelper.cs
- WebResourceAttribute.cs
- WindowsFormsLinkLabel.cs
- CheckBoxRenderer.cs
- WindowsSolidBrush.cs
- HandledEventArgs.cs
- ApplyTemplatesAction.cs
- ResourceSet.cs
- TypeExtensions.cs
- MetadataProperty.cs
- DisplayNameAttribute.cs
- ResXFileRef.cs
- TraceEventCache.cs
- SrgsDocumentParser.cs
- DbConnectionPoolIdentity.cs
- MemoryStream.cs
- ComponentResourceKey.cs
- MappingException.cs
- ProcessModuleCollection.cs
- SqlProviderUtilities.cs
- OutputCacheProfileCollection.cs
- EntityConnectionStringBuilderItem.cs
- ViewStateModeByIdAttribute.cs
- UnmanagedMarshal.cs
- ColumnProvider.cs
- DatasetMethodGenerator.cs
- SliderAutomationPeer.cs
- DropShadowEffect.cs
- ConsoleKeyInfo.cs
- LinkLabel.cs
- SubstitutionDesigner.cs
- PasswordPropertyTextAttribute.cs
- TypedTableBaseExtensions.cs
- CollectionsUtil.cs
- handlecollector.cs
- CommunicationException.cs
- FormatConvertedBitmap.cs
- FontNamesConverter.cs
- MetaType.cs
- ValidationResult.cs
- PageThemeBuildProvider.cs
- BinHexEncoding.cs
- BindStream.cs
- InternalDispatchObject.cs
- WebPartTransformerCollection.cs
- LinqExpressionNormalizer.cs
- BitArray.cs
- Token.cs
- IisTraceWebEventProvider.cs
- RawStylusInputCustomDataList.cs
- WebBrowserNavigatedEventHandler.cs
- Floater.cs
- QilInvokeLateBound.cs
- HtmlUtf8RawTextWriter.cs
- LinearKeyFrames.cs
- DbDataRecord.cs
- EdmSchemaError.cs
- AmbientValueAttribute.cs
- RuntimeIdentifierPropertyAttribute.cs
- IgnoreDataMemberAttribute.cs
- DataServiceClientException.cs
- XmlSerializer.cs
- ForceCopyBuildProvider.cs
- EntitySqlQueryState.cs
- EntityContainer.cs
- InternalControlCollection.cs
- AttachedAnnotation.cs
- ToolStripScrollButton.cs
- FastEncoderStatics.cs
- PropertyItemInternal.cs
- XmlEventCache.cs
- TextServicesProperty.cs
- PageRanges.cs
- ClusterRegistryConfigurationProvider.cs
- TextCompositionEventArgs.cs
- DictionaryContent.cs
- SelectedGridItemChangedEvent.cs
- PostBackOptions.cs
- OutOfProcStateClientManager.cs
- QueryCacheEntry.cs
- MemoryFailPoint.cs
- isolationinterop.cs
- LinkLabel.cs
- _LocalDataStoreMgr.cs
- SiteMapDataSource.cs
- ThicknessAnimationUsingKeyFrames.cs
- PackageRelationshipCollection.cs
- HitTestWithGeometryDrawingContextWalker.cs
- ComboBox.cs
- PropertyGridCommands.cs
- QilTernary.cs
- TimeSpan.cs
- HTTPNotFoundHandler.cs
- ReflectPropertyDescriptor.cs
- ErrorStyle.cs
- RefType.cs
- ISAPIRuntime.cs