Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Data / System / Data / Common / UInt64Storage.cs / 1305376 / UInt64Storage.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 UInt64Storage : DataStorage {
private static readonly UInt64 defaultValue = UInt64.MinValue;
private UInt64[] values;
public UInt64Storage(DataColumn column)
: base(column, typeof(UInt64), 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 += values[record];}
hasData = true;
}
}
if (hasData) {
return sum;
}
return NullValue;
case AggregateType.Mean:
Decimal meanSum = (Decimal)defaultValue;
int meanCount = 0;
foreach (int record in records) {
if (HasValue(record)) {
checked { meanSum += (Decimal)values[record];}
meanCount++;
hasData = true;
}
}
if (hasData) {
UInt64 mean;
checked {mean = (UInt64)(Decimal)(meanSum / (Decimal)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:
UInt64 min = UInt64.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:
UInt64 max = UInt64.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:
return base.Aggregate(records, kind);
}
}
catch (OverflowException) {
throw ExprException.Overflow(typeof(UInt64));
}
throw ExceptionBuilder.AggregateException(kind, DataType);
}
override public int Compare(int recordNo1, int recordNo2) {
UInt64 valueNo1 = values[recordNo1];
UInt64 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 ? -1 : (valueNo1 > valueNo2 ? 1 : 0)); // similar to UInt64.CompareTo(UInt64)
}
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);
}
UInt64 valueNo1 = values[recordNo];
if ((defaultValue == valueNo1) && !HasValue(recordNo)) {
return -1;
}
return valueNo1.CompareTo((UInt64)value);
//return(valueNo1 < valueNo2 ? -1 : (valueNo1 > valueNo2 ? 1 : 0)); // similar to UInt64.CompareTo(UInt64)
}
public override object ConvertValue(object value) {
if (NullValue != value) {
if (null != value) {
value = ((IConvertible)value).ToUInt64(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) {
UInt64 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).ToUInt64(FormatProvider);
SetNullBit(record, false);
}
}
override public void SetCapacity(int capacity) {
UInt64[] newValues = new UInt64[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.ToUInt64(s);
}
override public string ConvertObjectToXml(object value) {
return XmlConvert.ToString((UInt64)value);
}
override protected object GetEmptyStorage(int recordCount) {
return new UInt64[recordCount];
}
override protected void CopyValue(int record, object store, BitArray nullbits, int storeIndex) {
UInt64[] typedStore = (UInt64[]) store;
typedStore[storeIndex] = values[record];
nullbits.Set(storeIndex, !HasValue(record));
}
override protected void SetStorage(object store, BitArray nullbits) {
values = (UInt64[]) 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 UInt64Storage : DataStorage {
private static readonly UInt64 defaultValue = UInt64.MinValue;
private UInt64[] values;
public UInt64Storage(DataColumn column)
: base(column, typeof(UInt64), 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 += values[record];}
hasData = true;
}
}
if (hasData) {
return sum;
}
return NullValue;
case AggregateType.Mean:
Decimal meanSum = (Decimal)defaultValue;
int meanCount = 0;
foreach (int record in records) {
if (HasValue(record)) {
checked { meanSum += (Decimal)values[record];}
meanCount++;
hasData = true;
}
}
if (hasData) {
UInt64 mean;
checked {mean = (UInt64)(Decimal)(meanSum / (Decimal)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:
UInt64 min = UInt64.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:
UInt64 max = UInt64.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:
return base.Aggregate(records, kind);
}
}
catch (OverflowException) {
throw ExprException.Overflow(typeof(UInt64));
}
throw ExceptionBuilder.AggregateException(kind, DataType);
}
override public int Compare(int recordNo1, int recordNo2) {
UInt64 valueNo1 = values[recordNo1];
UInt64 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 ? -1 : (valueNo1 > valueNo2 ? 1 : 0)); // similar to UInt64.CompareTo(UInt64)
}
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);
}
UInt64 valueNo1 = values[recordNo];
if ((defaultValue == valueNo1) && !HasValue(recordNo)) {
return -1;
}
return valueNo1.CompareTo((UInt64)value);
//return(valueNo1 < valueNo2 ? -1 : (valueNo1 > valueNo2 ? 1 : 0)); // similar to UInt64.CompareTo(UInt64)
}
public override object ConvertValue(object value) {
if (NullValue != value) {
if (null != value) {
value = ((IConvertible)value).ToUInt64(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) {
UInt64 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).ToUInt64(FormatProvider);
SetNullBit(record, false);
}
}
override public void SetCapacity(int capacity) {
UInt64[] newValues = new UInt64[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.ToUInt64(s);
}
override public string ConvertObjectToXml(object value) {
return XmlConvert.ToString((UInt64)value);
}
override protected object GetEmptyStorage(int recordCount) {
return new UInt64[recordCount];
}
override protected void CopyValue(int record, object store, BitArray nullbits, int storeIndex) {
UInt64[] typedStore = (UInt64[]) store;
typedStore[storeIndex] = values[record];
nullbits.Set(storeIndex, !HasValue(record));
}
override protected void SetStorage(object store, BitArray nullbits) {
values = (UInt64[]) 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
- URL.cs
- BindingNavigator.cs
- NetSectionGroup.cs
- AndCondition.cs
- DataServiceStreamProviderWrapper.cs
- SettingsProviderCollection.cs
- EntityDesignerBuildProvider.cs
- Compiler.cs
- PropertyPathWorker.cs
- SymmetricKey.cs
- TextElementCollection.cs
- FlowNode.cs
- FreeFormDesigner.cs
- Volatile.cs
- RtfToXamlLexer.cs
- WebPartCollection.cs
- CorrelationInitializer.cs
- CopyAction.cs
- EditCommandColumn.cs
- EntityClassGenerator.cs
- RtType.cs
- DataBinder.cs
- SafeCloseHandleCritical.cs
- StateMachine.cs
- DrawingContext.cs
- WebConfigurationHost.cs
- TypeForwardedToAttribute.cs
- WebHttpBindingCollectionElement.cs
- DocumentViewerHelper.cs
- XmlText.cs
- DrawTreeNodeEventArgs.cs
- _Connection.cs
- Material.cs
- Int16.cs
- NavigationExpr.cs
- OdbcInfoMessageEvent.cs
- UIElement3D.cs
- TaskExceptionHolder.cs
- JsonClassDataContract.cs
- Set.cs
- BuildResultCache.cs
- ColorConvertedBitmap.cs
- ReadWriteSpinLock.cs
- ReversePositionQuery.cs
- CodeAttachEventStatement.cs
- Overlapped.cs
- DataListGeneralPage.cs
- TraceSection.cs
- GridViewColumnHeader.cs
- XmlAttribute.cs
- PropertyTabChangedEvent.cs
- VersionedStream.cs
- TripleDESCryptoServiceProvider.cs
- DataRowView.cs
- OptimalTextSource.cs
- RunInstallerAttribute.cs
- ControllableStoryboardAction.cs
- InternalPermissions.cs
- SqlCommandSet.cs
- InputProcessorProfiles.cs
- System.Data.OracleClient_BID.cs
- CTreeGenerator.cs
- Operator.cs
- EventNotify.cs
- Completion.cs
- ByteViewer.cs
- Transactions.cs
- DrawingVisualDrawingContext.cs
- SmiRequestExecutor.cs
- BooleanKeyFrameCollection.cs
- WinEventWrap.cs
- _LoggingObject.cs
- SerializationInfo.cs
- ItemContainerGenerator.cs
- AutoResizedEvent.cs
- EpmTargetTree.cs
- AccessedThroughPropertyAttribute.cs
- TrailingSpaceComparer.cs
- WorkflowApplicationCompletedException.cs
- EntityTypeBase.cs
- ServiceChannelManager.cs
- UiaCoreTypesApi.cs
- SiteMapDataSourceView.cs
- SqlVisitor.cs
- SecurityTokenTypes.cs
- DbSetClause.cs
- StylusDownEventArgs.cs
- ProtectedConfiguration.cs
- TypeDelegator.cs
- StaticExtension.cs
- AssertSection.cs
- XPathEmptyIterator.cs
- StrokeCollectionConverter.cs
- SafeLibraryHandle.cs
- BaseCAMarshaler.cs
- EntityDataSourceWizardForm.cs
- ModelToObjectValueConverter.cs
- WebPartCancelEventArgs.cs
- ResourceAssociationSetEnd.cs
- ModuleConfigurationInfo.cs