Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / whidbey / netfxsp / ndp / fx / src / Data / System / Data / Common / SByteStorage.cs / 1 / SByteStorage.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 SByteStorage : DataStorage { private const SByte defaultValue = 0; private SByte[] values; public SByteStorage(DataColumn column) : base(column, typeof(SByte), defaultValue) { } override public Object Aggregate(int[] records, AggregateType kind) { bool hasData = false; try { switch (kind) { case AggregateType.Sum: Int64 sum = defaultValue; foreach (int record in records) { if (IsNull(record)) continue; checked { sum += 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 (IsNull(record)) continue; checked { meanSum += (Int64)values[record];} meanCount++; hasData = true; } if (hasData) { SByte mean; checked {mean = (SByte)(meanSum / meanCount);} return mean; } return NullValue; case AggregateType.Var: case AggregateType.StDev: int count = 0; double var = (double)defaultValue; double prec = (double)defaultValue; double dsum = (double)defaultValue; double sqrsum = (double)defaultValue; foreach (int record in records) { if (IsNull(record)) continue; 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: SByte min = SByte.MaxValue; for (int i = 0; i < records.Length; i++) { int record = records[i]; if (IsNull(record)) continue; min=Math.Min(values[record], min); hasData = true; } if (hasData) { return min; } return NullValue; case AggregateType.Max: SByte max = SByte.MinValue; for (int i = 0; i < records.Length; i++) { int record = records[i]; if (IsNull(record)) continue; 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: return base.Aggregate(records, kind); } } catch (OverflowException) { throw ExprException.Overflow(typeof(SByte)); } throw ExceptionBuilder.AggregateException(kind, DataType); } override public int Compare(int recordNo1, int recordNo2) { SByte valueNo1 = values[recordNo1]; SByte valueNo2 = values[recordNo2]; if (valueNo1.Equals(defaultValue) || valueNo2.Equals(defaultValue)) { int bitCheck = CompareBits(recordNo1, recordNo2); if (0 != bitCheck) return bitCheck; } return valueNo1.CompareTo(valueNo2); //return(valueNo1 - valueNo2); // copied from SByte.CompareTo(SByte) } 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) { if (IsNull(recordNo)) { return 0; } return 1; } SByte valueNo1 = values[recordNo]; if ((defaultValue == valueNo1) && IsNull(recordNo)) { return -1; } return valueNo1.CompareTo((SByte)value); //return(valueNo1 - valueNo2); // copied from SByte.CompareTo(SByte) } public override object ConvertValue(object value) { if (NullValue != value) { if (null != value) { value = ((IConvertible)value).ToSByte(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) { SByte 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).ToSByte(FormatProvider); SetNullBit(record, false); } } override public void SetCapacity(int capacity) { SByte[] newValues = new SByte[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.ToSByte(s); } override public string ConvertObjectToXml(object value) { return XmlConvert.ToString((SByte)value); } override protected object GetEmptyStorage(int recordCount) { return new SByte[recordCount]; } override protected void CopyValue(int record, object store, BitArray nullbits, int storeIndex) { SByte[] typedStore = (SByte[]) store; typedStore[storeIndex] = values[record]; nullbits.Set(storeIndex, IsNull(record)); } override protected void SetStorage(object store, BitArray nullbits) { values = (SByte[]) 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 SByteStorage : DataStorage { private const SByte defaultValue = 0; private SByte[] values; public SByteStorage(DataColumn column) : base(column, typeof(SByte), defaultValue) { } override public Object Aggregate(int[] records, AggregateType kind) { bool hasData = false; try { switch (kind) { case AggregateType.Sum: Int64 sum = defaultValue; foreach (int record in records) { if (IsNull(record)) continue; checked { sum += 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 (IsNull(record)) continue; checked { meanSum += (Int64)values[record];} meanCount++; hasData = true; } if (hasData) { SByte mean; checked {mean = (SByte)(meanSum / meanCount);} return mean; } return NullValue; case AggregateType.Var: case AggregateType.StDev: int count = 0; double var = (double)defaultValue; double prec = (double)defaultValue; double dsum = (double)defaultValue; double sqrsum = (double)defaultValue; foreach (int record in records) { if (IsNull(record)) continue; 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: SByte min = SByte.MaxValue; for (int i = 0; i < records.Length; i++) { int record = records[i]; if (IsNull(record)) continue; min=Math.Min(values[record], min); hasData = true; } if (hasData) { return min; } return NullValue; case AggregateType.Max: SByte max = SByte.MinValue; for (int i = 0; i < records.Length; i++) { int record = records[i]; if (IsNull(record)) continue; 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: return base.Aggregate(records, kind); } } catch (OverflowException) { throw ExprException.Overflow(typeof(SByte)); } throw ExceptionBuilder.AggregateException(kind, DataType); } override public int Compare(int recordNo1, int recordNo2) { SByte valueNo1 = values[recordNo1]; SByte valueNo2 = values[recordNo2]; if (valueNo1.Equals(defaultValue) || valueNo2.Equals(defaultValue)) { int bitCheck = CompareBits(recordNo1, recordNo2); if (0 != bitCheck) return bitCheck; } return valueNo1.CompareTo(valueNo2); //return(valueNo1 - valueNo2); // copied from SByte.CompareTo(SByte) } 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) { if (IsNull(recordNo)) { return 0; } return 1; } SByte valueNo1 = values[recordNo]; if ((defaultValue == valueNo1) && IsNull(recordNo)) { return -1; } return valueNo1.CompareTo((SByte)value); //return(valueNo1 - valueNo2); // copied from SByte.CompareTo(SByte) } public override object ConvertValue(object value) { if (NullValue != value) { if (null != value) { value = ((IConvertible)value).ToSByte(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) { SByte 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).ToSByte(FormatProvider); SetNullBit(record, false); } } override public void SetCapacity(int capacity) { SByte[] newValues = new SByte[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.ToSByte(s); } override public string ConvertObjectToXml(object value) { return XmlConvert.ToString((SByte)value); } override protected object GetEmptyStorage(int recordCount) { return new SByte[recordCount]; } override protected void CopyValue(int record, object store, BitArray nullbits, int storeIndex) { SByte[] typedStore = (SByte[]) store; typedStore[storeIndex] = values[record]; nullbits.Set(storeIndex, IsNull(record)); } override protected void SetStorage(object store, BitArray nullbits) { values = (SByte[]) 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
- ArgIterator.cs
- UnsafeNativeMethods.cs
- OracleRowUpdatingEventArgs.cs
- XmlAttribute.cs
- UITypeEditor.cs
- Item.cs
- LinearKeyFrames.cs
- UnknownBitmapEncoder.cs
- TreeNodeCollectionEditorDialog.cs
- securitymgrsite.cs
- SiteMembershipCondition.cs
- ExpressionPrefixAttribute.cs
- XmlHierarchicalEnumerable.cs
- PolygonHotSpot.cs
- CapabilitiesPattern.cs
- WebException.cs
- XmlAnyElementAttributes.cs
- LoadedOrUnloadedOperation.cs
- TypeInitializationException.cs
- KeySplineConverter.cs
- AssociationSet.cs
- ArgumentValidation.cs
- AbstractDataSvcMapFileLoader.cs
- DataControlCommands.cs
- ExtensionElement.cs
- ActivityTypeResolver.xaml.cs
- ZipIOExtraField.cs
- PbrsForward.cs
- CallbackHandler.cs
- SystemInfo.cs
- XsdBuilder.cs
- DesignerAutoFormatCollection.cs
- TypeInitializationException.cs
- LinqDataSourceView.cs
- _AuthenticationState.cs
- ProfileEventArgs.cs
- SupportsEventValidationAttribute.cs
- UnsafeNativeMethodsTablet.cs
- InheritanceRules.cs
- DbDataReader.cs
- SafeArrayTypeMismatchException.cs
- InkCanvasSelection.cs
- Size3D.cs
- Oid.cs
- XmlSchemaAnyAttribute.cs
- ViewPort3D.cs
- TraceInternal.cs
- GenericPrincipal.cs
- ApplicationActivator.cs
- SecurityContext.cs
- OutputCacheSettingsSection.cs
- MessageEncodingBindingElement.cs
- SignatureToken.cs
- _ScatterGatherBuffers.cs
- CopyOfAction.cs
- BulletedListDesigner.cs
- NumberFunctions.cs
- NativeMethods.cs
- SqlCommandBuilder.cs
- StylusOverProperty.cs
- Axis.cs
- PassportPrincipal.cs
- XamlStyleSerializer.cs
- Misc.cs
- NamespaceQuery.cs
- MouseBinding.cs
- UnauthorizedWebPart.cs
- DynamicPhysicalDiscoSearcher.cs
- StructuralObject.cs
- RepeaterItemEventArgs.cs
- HtmlElementErrorEventArgs.cs
- DataMemberFieldEditor.cs
- DeclarationUpdate.cs
- FrameworkElementFactoryMarkupObject.cs
- SingleStorage.cs
- RegexCode.cs
- CqlParserHelpers.cs
- Animatable.cs
- LinkedResourceCollection.cs
- KeyboardEventArgs.cs
- DataViewSetting.cs
- StringDictionary.cs
- SafeFileMapViewHandle.cs
- UnSafeCharBuffer.cs
- AxisAngleRotation3D.cs
- Regex.cs
- NetDispatcherFaultException.cs
- Preprocessor.cs
- AccessibilityApplicationManager.cs
- PathData.cs
- WindowsListViewGroupHelper.cs
- NativeMethods.cs
- ApplicationSecurityInfo.cs
- SimpleRecyclingCache.cs
- EntityDataSourceContainerNameItem.cs
- TaskFileService.cs
- Point3DAnimationUsingKeyFrames.cs
- DataContractFormatAttribute.cs
- TiffBitmapEncoder.cs
- DbInsertCommandTree.cs