Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / Xml / System / Xml / schema / XsdDuration.cs / 1 / XsdDuration.cs
//------------------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// [....]
//-----------------------------------------------------------------------------
namespace System.Xml.Schema {
using System;
using System.Diagnostics;
using System.Text;
///
/// This structure holds components of an Xsd Duration. It is used internally to support Xsd durations without loss
/// of fidelity. XsdDuration structures are immutable once they've been created.
///
internal struct XsdDuration {
private int years;
private int months;
private int days;
private int hours;
private int minutes;
private int seconds;
private uint nanoseconds; // High bit is used to indicate whether duration is negative
private const uint NegativeBit = 0x80000000;
private enum Parts {
HasNone = 0,
HasYears = 1,
HasMonths = 2,
HasDays = 4,
HasHours = 8,
HasMinutes = 16,
HasSeconds = 32,
}
internal enum DurationType {
Duration,
YearMonthDuration,
DayTimeDuration,
};
///
/// Construct an XsdDuration from component parts.
///
public XsdDuration(bool isNegative, int years, int months, int days, int hours, int minutes, int seconds, int nanoseconds) {
if (years < 0) throw new ArgumentOutOfRangeException("years");
if (months < 0) throw new ArgumentOutOfRangeException("months");
if (days < 0) throw new ArgumentOutOfRangeException("days");
if (hours < 0) throw new ArgumentOutOfRangeException("hours");
if (minutes < 0) throw new ArgumentOutOfRangeException("minutes");
if (seconds < 0) throw new ArgumentOutOfRangeException("seconds");
if (nanoseconds < 0 || nanoseconds > 999999999) throw new ArgumentOutOfRangeException("nanoseconds");
this.years = years;
this.months = months;
this.days = days;
this.hours = hours;
this.minutes = minutes;
this.seconds = seconds;
this.nanoseconds = (uint) nanoseconds;
if (isNegative)
this.nanoseconds |= NegativeBit;
}
///
/// Construct an XsdDuration from a TimeSpan value.
///
public XsdDuration(TimeSpan timeSpan) : this(timeSpan, DurationType.Duration) {
}
///
/// Construct an XsdDuration from a TimeSpan value that represents an xsd:duration, an xdt:dayTimeDuration, or
/// an xdt:yearMonthDuration.
///
internal XsdDuration(TimeSpan timeSpan, DurationType durationType) {
long ticks = timeSpan.Ticks;
ulong ticksPos;
bool isNegative;
if (ticks < 0) {
// Note that (ulong) -Int64.MinValue = Int64.MaxValue + 1, which is what we want for that special case
isNegative = true;
ticksPos = (ulong) -ticks;
}
else {
isNegative = false;
ticksPos = (ulong) ticks;
}
if (durationType == DurationType.YearMonthDuration) {
int years = (int) (ticksPos / ((ulong) TimeSpan.TicksPerDay * 365));
int months = (int) ((ticksPos % ((ulong) TimeSpan.TicksPerDay * 365)) / ((ulong) TimeSpan.TicksPerDay * 30));
if (months == 12) {
// If remaining days >= 360 and < 365, then round off to year
years++;
months = 0;
}
this = new XsdDuration(isNegative, years, months, 0, 0, 0, 0, 0);
}
else {
Debug.Assert(durationType == DurationType.Duration || durationType == DurationType.DayTimeDuration);
// Tick count is expressed in 100 nanosecond intervals
this.nanoseconds = (uint) (ticksPos % 10000000) * 100;
if (isNegative)
this.nanoseconds |= NegativeBit;
this.years = 0;
this.months = 0;
this.days = (int) (ticksPos / (ulong) TimeSpan.TicksPerDay);
this.hours = (int) ((ticksPos / (ulong) TimeSpan.TicksPerHour) % 24);
this.minutes = (int) ((ticksPos / (ulong) TimeSpan.TicksPerMinute) % 60);
this.seconds = (int) ((ticksPos / (ulong) TimeSpan.TicksPerSecond) % 60);
}
}
///
/// Constructs an XsdDuration from a string in the xsd:duration format. Components are stored with loss
/// of fidelity (except in the case of overflow).
///
public XsdDuration(string s) : this(s, DurationType.Duration) {
}
///
/// Constructs an XsdDuration from a string in the xsd:duration format. Components are stored without loss
/// of fidelity (except in the case of overflow).
///
public XsdDuration(string s, DurationType durationType) {
XsdDuration result;
Exception exception = TryParse(s, durationType, out result);
if (exception != null) {
throw exception;
}
this.years = result.Years;
this.months = result.Months;
this.days = result.Days;
this.hours = result.Hours;
this.minutes = result.Minutes;
this.seconds = result.Seconds;
this.nanoseconds = (uint)result.Nanoseconds;
if (result.IsNegative) {
this.nanoseconds |= NegativeBit;
}
return;
}
///
/// Return true if this duration is negative.
///
public bool IsNegative {
get { return (this.nanoseconds & NegativeBit) != 0; }
}
///
/// Return number of years in this duration (stored in 31 bits).
///
public int Years {
get { return this.years; }
}
///
/// Return number of months in this duration (stored in 31 bits).
///
public int Months {
get { return this.months; }
}
///
/// Return number of days in this duration (stored in 31 bits).
///
public int Days {
get { return this.days; }
}
///
/// Return number of hours in this duration (stored in 31 bits).
///
public int Hours {
get { return this.hours; }
}
///
/// Return number of minutes in this duration (stored in 31 bits).
///
public int Minutes {
get { return this.minutes; }
}
///
/// Return number of seconds in this duration (stored in 31 bits).
///
public int Seconds {
get { return this.seconds; }
}
///
/// Return number of nanoseconds in this duration.
///
public int Nanoseconds {
get { return (int) (this.nanoseconds & ~NegativeBit); }
}
///
/// Return number of microseconds in this duration.
///
public int Microseconds {
get { return Nanoseconds / 1000; }
}
///
/// Return number of milliseconds in this duration.
///
public int Milliseconds {
get { return Nanoseconds / 1000000; }
}
///
/// Normalize year-month part and day-time part so that month < 12, hour < 24, minute < 60, and second < 60.
///
public XsdDuration Normalize() {
int years = Years;
int months = Months;
int days = Days;
int hours = Hours;
int minutes = Minutes;
int seconds = Seconds;
try {
checked {
if (months >= 12) {
years += months / 12;
months %= 12;
}
if (seconds >= 60) {
minutes += seconds / 60;
seconds %= 60;
}
if (minutes >= 60) {
hours += minutes / 60;
minutes %= 60;
}
if (hours >= 24) {
days += hours / 24;
hours %= 24;
}
}
}
catch (OverflowException) {
throw new OverflowException(Res.GetString(Res.XmlConvert_Overflow, ToString(), "Duration"));
}
return new XsdDuration(IsNegative, years, months, days, hours, minutes, seconds, Nanoseconds);
}
///
/// Internal helper method that converts an Xsd duration to a TimeSpan value. This code uses the estimate
/// that there are 365 days in the year and 30 days in a month.
///
public TimeSpan ToTimeSpan() {
return ToTimeSpan(DurationType.Duration);
}
///
/// Internal helper method that converts an Xsd duration to a TimeSpan value. This code uses the estimate
/// that there are 365 days in the year and 30 days in a month.
///
internal TimeSpan ToTimeSpan(DurationType durationType) {
TimeSpan result;
Exception exception = TryToTimeSpan(durationType, out result);
if (exception != null) {
throw exception;
}
return result;
}
internal Exception TryToTimeSpan(out TimeSpan result) {
return TryToTimeSpan(DurationType.Duration, out result);
}
internal Exception TryToTimeSpan(DurationType durationType, out TimeSpan result) {
Exception exception = null;
ulong ticks = 0;
// Throw error if result cannot fit into a long
try {
checked {
// Discard year and month parts if constructing TimeSpan for DayTimeDuration
if (durationType != DurationType.DayTimeDuration) {
ticks += ((ulong) this.years + (ulong) this.months / 12) * 365;
ticks += ((ulong) this.months % 12) * 30;
}
// Discard day and time parts if constructing TimeSpan for YearMonthDuration
if (durationType != DurationType.YearMonthDuration) {
ticks += (ulong) this.days;
ticks *= 24;
ticks += (ulong) this.hours;
ticks *= 60;
ticks += (ulong) this.minutes;
ticks *= 60;
ticks += (ulong) this.seconds;
// Tick count interval is in 100 nanosecond intervals (7 digits)
ticks *= (ulong) TimeSpan.TicksPerSecond;
ticks += (ulong) Nanoseconds / 100;
}
else {
// Multiply YearMonth duration by number of ticks per day
ticks *= (ulong) TimeSpan.TicksPerDay;
}
if (IsNegative) {
// Handle special case of Int64.MaxValue + 1 before negation, since it would otherwise overflow
if (ticks == (ulong) Int64.MaxValue + 1) {
result = new TimeSpan(Int64.MinValue);
}
else {
result = new TimeSpan(-((long) ticks));
}
}
else {
result = new TimeSpan((long) ticks);
}
return null;
}
}
catch (OverflowException) {
result = TimeSpan.MinValue;
exception = new OverflowException(Res.GetString(Res.XmlConvert_Overflow, durationType, "TimeSpan"));
}
return exception;
}
///
/// Return the string representation of this Xsd duration.
///
public override string ToString() {
return ToString(DurationType.Duration);
}
///
/// Return the string representation according to xsd:duration rules, xdt:dayTimeDuration rules, or
/// xdt:yearMonthDuration rules.
///
internal string ToString(DurationType durationType) {
StringBuilder sb = new StringBuilder(20);
int nanoseconds, digit, zeroIdx, len;
if (IsNegative)
sb.Append('-');
sb.Append('P');
if (durationType != DurationType.DayTimeDuration) {
if (this.years != 0) {
sb.Append(XmlConvert.ToString(this.years));
sb.Append('Y');
}
if (this.months != 0) {
sb.Append(XmlConvert.ToString(this.months));
sb.Append('M');
}
}
if (durationType != DurationType.YearMonthDuration) {
if (this.days != 0) {
sb.Append(XmlConvert.ToString(this.days));
sb.Append('D');
}
if (this.hours != 0 || this.minutes != 0 || this.seconds != 0 || Nanoseconds != 0) {
sb.Append('T');
if (this.hours != 0) {
sb.Append(XmlConvert.ToString(this.hours));
sb.Append('H');
}
if (this.minutes != 0) {
sb.Append(XmlConvert.ToString(this.minutes));
sb.Append('M');
}
nanoseconds = Nanoseconds;
if (this.seconds != 0 || nanoseconds != 0) {
sb.Append(XmlConvert.ToString(this.seconds));
if (nanoseconds != 0) {
sb.Append('.');
len = sb.Length;
sb.Length += 9;
zeroIdx = sb.Length - 1;
for (int idx = zeroIdx; idx >= len; idx--) {
digit = nanoseconds % 10;
sb[idx] = (char) (digit + '0');
if (zeroIdx == idx && digit == 0)
zeroIdx--;
nanoseconds /= 10;
}
sb.Length = zeroIdx + 1;
}
sb.Append('S');
}
}
// Zero is represented as "PT0S"
if (sb[sb.Length - 1] == 'P')
sb.Append("T0S");
}
else {
// Zero is represented as "T0M"
if (sb[sb.Length - 1] == 'P')
sb.Append("0M");
}
return sb.ToString();
}
internal static Exception TryParse(string s, out XsdDuration result) {
return TryParse(s, DurationType.Duration, out result);
}
internal static Exception TryParse(string s, DurationType durationType, out XsdDuration result) {
string errorCode;
int length;
int value, pos, numDigits;
Parts parts = Parts.HasNone;
result = new XsdDuration();
s = s.Trim();
length = s.Length;
pos = 0;
numDigits = 0;
if (pos >= length) goto InvalidFormat;
if (s[pos] == '-') {
pos++;
result.nanoseconds = NegativeBit;
}
else {
result.nanoseconds = 0;
}
if (pos >= length) goto InvalidFormat;
if (s[pos++] != 'P') goto InvalidFormat;
errorCode = TryParseDigits(s, ref pos, false, out value, out numDigits);
if (errorCode != null) goto Error;
if (pos >= length) goto InvalidFormat;
if (s[pos] == 'Y') {
if (numDigits == 0) goto InvalidFormat;
parts |= Parts.HasYears;
result.years = value;
if (++pos == length) goto Done;
errorCode = TryParseDigits(s, ref pos, false, out value, out numDigits);
if (errorCode != null) goto Error;
if (pos >= length) goto InvalidFormat;
}
if (s[pos] == 'M') {
if (numDigits == 0) goto InvalidFormat;
parts |= Parts.HasMonths;
result.months = value;
if (++pos == length) goto Done;
errorCode = TryParseDigits(s, ref pos, false, out value, out numDigits);
if (errorCode != null) goto Error;
if (pos >= length) goto InvalidFormat;
}
if (s[pos] == 'D') {
if (numDigits == 0) goto InvalidFormat;
parts |= Parts.HasDays;
result.days = value;
if (++pos == length) goto Done;
errorCode = TryParseDigits(s, ref pos, false, out value, out numDigits);
if (errorCode != null) goto Error;
if (pos >= length) goto InvalidFormat;
}
if (s[pos] == 'T') {
if (numDigits != 0) goto InvalidFormat;
pos++;
errorCode = TryParseDigits(s, ref pos, false, out value, out numDigits);
if (errorCode != null) goto Error;
if (pos >= length) goto InvalidFormat;
if (s[pos] == 'H') {
if (numDigits == 0) goto InvalidFormat;
parts |= Parts.HasHours;
result.hours = value;
if (++pos == length) goto Done;
errorCode = TryParseDigits(s, ref pos, false, out value, out numDigits);
if (errorCode != null) goto Error;
if (pos >= length) goto InvalidFormat;
}
if (s[pos] == 'M') {
if (numDigits == 0) goto InvalidFormat;
parts |= Parts.HasMinutes;
result.minutes = value;
if (++pos == length) goto Done;
errorCode = TryParseDigits(s, ref pos, false, out value, out numDigits);
if (errorCode != null) goto Error;
if (pos >= length) goto InvalidFormat;
}
if (s[pos] == '.') {
pos++;
parts |= Parts.HasSeconds;
result.seconds = value;
errorCode = TryParseDigits(s, ref pos, true, out value, out numDigits);
if (errorCode != null) goto Error;
if (numDigits == 0) { //If there are no digits after the decimal point, assume 0
value = 0;
}
// Normalize to nanosecond intervals
for (; numDigits > 9; numDigits--)
value /= 10;
for (; numDigits < 9; numDigits++)
value *= 10;
result.nanoseconds |= (uint) value;
if (pos >= length) goto InvalidFormat;
if (s[pos] != 'S') goto InvalidFormat;
if (++pos == length) goto Done;
}
else if (s[pos] == 'S') {
if (numDigits == 0) goto InvalidFormat;
parts |= Parts.HasSeconds;
result.seconds = value;
if (++pos == length) goto Done;
}
}
// Duration cannot end with digits
if (numDigits != 0) goto InvalidFormat;
// No further characters are allowed
if (pos != length) goto InvalidFormat;
Done:
// At least one part must be defined
if (parts == Parts.HasNone) goto InvalidFormat;
if (durationType == DurationType.DayTimeDuration) {
if ((parts & (Parts.HasYears | Parts.HasMonths)) != 0)
goto InvalidFormat;
}
else if (durationType == DurationType.YearMonthDuration) {
if ((parts & ~(XsdDuration.Parts.HasYears | XsdDuration.Parts.HasMonths)) != 0)
goto InvalidFormat;
}
return null;
InvalidFormat:
return new FormatException(Res.GetString(Res.XmlConvert_BadFormat, s, durationType));
Error:
return new OverflowException(Res.GetString(Res.XmlConvert_Overflow, s, durationType));
}
/// Helper method that constructs an integer from leading digits starting at s[offset]. "offset" is
/// updated to contain an offset just beyond the last digit. The number of digits consumed is returned in
/// cntDigits. The integer is returned (0 if no digits). If the digits cannot fit into an Int32:
/// 1. If eatDigits is true, then additional digits will be silently discarded (don't count towards numDigits)
/// 2. If eatDigits is false, an overflow exception is thrown
private static string TryParseDigits(string s, ref int offset, bool eatDigits, out int result, out int numDigits) {
int offsetStart = offset;
int offsetEnd = s.Length;
int digit;
result = 0;
numDigits = 0;
while (offset < offsetEnd && s[offset] >= '0' && s[offset] <= '9') {
digit = s[offset] - '0';
if (result > (Int32.MaxValue - digit) / 10) {
if (!eatDigits) {
return Res.XmlConvert_Overflow;
}
// Skip past any remaining digits
numDigits = offset - offsetStart;
while (offset < offsetEnd && s[offset] >= '0' && s[offset] <= '9') {
offset++;
}
return null;
}
result = result * 10 + digit;
offset++;
}
numDigits = offset - offsetStart;
return null;
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- SynchronizedDispatch.cs
- PerfCounterSection.cs
- EncoderReplacementFallback.cs
- TickBar.cs
- ConditionalExpression.cs
- Authorization.cs
- EventSinkHelperWriter.cs
- ZoneLinkButton.cs
- ListViewItem.cs
- TextEditorParagraphs.cs
- KernelTypeValidation.cs
- InvokeProviderWrapper.cs
- AdPostCacheSubstitution.cs
- ConditionedDesigner.cs
- ToolBarOverflowPanel.cs
- AffineTransform3D.cs
- ByteStream.cs
- CompositeDesignerAccessibleObject.cs
- Size3DValueSerializer.cs
- OleStrCAMarshaler.cs
- DoubleLinkListEnumerator.cs
- ValueUnavailableException.cs
- DeploymentExceptionMapper.cs
- BindingRestrictions.cs
- SurrogateSelector.cs
- VerticalAlignConverter.cs
- ReadOnlyHierarchicalDataSourceView.cs
- Function.cs
- CompilerWrapper.cs
- FixedBufferAttribute.cs
- SwitchAttribute.cs
- SafeUserTokenHandle.cs
- WorkflowViewService.cs
- DrawingImage.cs
- ReadonlyMessageFilter.cs
- datacache.cs
- ChangeTracker.cs
- ProvidersHelper.cs
- Header.cs
- Help.cs
- ListViewInsertionMark.cs
- ThrowHelper.cs
- SelectionEditingBehavior.cs
- JoinElimination.cs
- AstNode.cs
- DetailsViewModeEventArgs.cs
- SqlBooleanMismatchVisitor.cs
- isolationinterop.cs
- IntSumAggregationOperator.cs
- basenumberconverter.cs
- GroupBoxRenderer.cs
- MasterPageCodeDomTreeGenerator.cs
- ThreadAttributes.cs
- GraphicsPath.cs
- QueryTreeBuilder.cs
- BindingElementExtensionElement.cs
- Light.cs
- IgnoreSectionHandler.cs
- IntSecurity.cs
- CTreeGenerator.cs
- RuntimeConfigurationRecord.cs
- ContentDisposition.cs
- ObjectSpanRewriter.cs
- HtmlTableCellCollection.cs
- assemblycache.cs
- StyleConverter.cs
- StatusBar.cs
- DataPointer.cs
- RepeaterItemCollection.cs
- XPathPatternBuilder.cs
- UriSectionData.cs
- OleDbWrapper.cs
- WindowsGrip.cs
- DataRecordObjectView.cs
- ConfigXmlCDataSection.cs
- OneOfElement.cs
- TabPage.cs
- DataControlFieldsEditor.cs
- WebContext.cs
- Frame.cs
- ProfileServiceManager.cs
- ScrollViewer.cs
- NamedElement.cs
- AmbientValueAttribute.cs
- ConstNode.cs
- _KerberosClient.cs
- FacetEnabledSchemaElement.cs
- Control.cs
- StructuredTypeInfo.cs
- ResolveMatches11.cs
- ListMarkerSourceInfo.cs
- SystemIPv6InterfaceProperties.cs
- CallbackValidatorAttribute.cs
- TrackingSection.cs
- RegisteredScript.cs
- HtmlDocument.cs
- AssemblyInfo.cs
- SafeCertificateStore.cs
- EventLogPermissionEntry.cs
- Int32RectValueSerializer.cs