Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / clr / src / BCL / System / TimeSpan.cs / 1 / TimeSpan.cs
// ==++==
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// ==--==
namespace System {
using System.Text;
using System;
// TimeSpan represents a duration of time. A TimeSpan can be negative
// or positive.
//
// TimeSpan is internally represented as a number of milliseconds. While
// this maps well into units of time such as hours and days, any
// periods longer than that aren't representable in a nice fashion.
// For instance, a month can be between 28 and 31 days, while a year
// can contain 365 or 364 days. A decade can have between 1 and 3 leapyears,
// depending on when you map the TimeSpan into the calendar. This is why
// we do not provide Years() or Months().
//
[System.Runtime.InteropServices.ComVisible(true)]
[Serializable] public struct TimeSpan : IComparable
#if GENERICS_WORK
, IComparable, IEquatable
#endif
{
public const long TicksPerMillisecond = 10000;
private const double MillisecondsPerTick = 1.0 / TicksPerMillisecond;
public const long TicksPerSecond = TicksPerMillisecond * 1000;
private const double SecondsPerTick = 1.0 / TicksPerSecond;
public const long TicksPerMinute = TicksPerSecond * 60;
private const double MinutesPerTick = 1.0 / TicksPerMinute;
public const long TicksPerHour = TicksPerMinute * 60;
private const double HoursPerTick = 1.0 / TicksPerHour;
public const long TicksPerDay = TicksPerHour * 24;
private const double DaysPerTick = 1.0 / TicksPerDay;
private const int MillisPerSecond = 1000;
private const int MillisPerMinute = MillisPerSecond * 60;
private const int MillisPerHour = MillisPerMinute * 60;
private const int MillisPerDay = MillisPerHour * 24;
private const long MaxSeconds = Int64.MaxValue / TicksPerSecond;
private const long MinSeconds = Int64.MinValue / TicksPerSecond;
private const long MaxMilliSeconds = Int64.MaxValue / TicksPerMillisecond;
private const long MinMilliSeconds = Int64.MinValue / TicksPerMillisecond;
public static readonly TimeSpan Zero = new TimeSpan(0);
public static readonly TimeSpan MaxValue = new TimeSpan(Int64.MaxValue);
public static readonly TimeSpan MinValue = new TimeSpan(Int64.MinValue);
// internal so that DateTime doesn't have to call an extra get
// method for some arithmetic operations.
internal long _ticks;
//public TimeSpan() {
// _ticks = 0;
//}
public TimeSpan(long ticks) {
this._ticks = ticks;
}
public TimeSpan(int hours, int minutes, int seconds) {
_ticks = TimeToTicks(hours, minutes, seconds);
}
public TimeSpan(int days, int hours, int minutes, int seconds)
: this(days,hours,minutes,seconds,0)
{
}
public TimeSpan(int days, int hours, int minutes, int seconds, int milliseconds)
{
Int64 totalMilliSeconds = ((Int64)days * 3600 * 24 + (Int64)hours * 3600 + (Int64)minutes * 60 + seconds) * 1000 + milliseconds;
if (totalMilliSeconds > MaxMilliSeconds || totalMilliSeconds < MinMilliSeconds)
throw new ArgumentOutOfRangeException(null, Environment.GetResourceString("Overflow_TimeSpanTooLong"));
_ticks = (long)totalMilliSeconds * TicksPerMillisecond;
}
public long Ticks {
get { return _ticks; }
}
public int Days {
get { return (int)(_ticks / TicksPerDay); }
}
public int Hours {
get { return (int)((_ticks / TicksPerHour) % 24); }
}
public int Milliseconds {
get { return (int)((_ticks / TicksPerMillisecond) % 1000); }
}
public int Minutes {
get { return (int)((_ticks / TicksPerMinute) % 60); }
}
public int Seconds {
get { return (int)((_ticks / TicksPerSecond) % 60); }
}
public double TotalDays {
get { return ((double)_ticks) * DaysPerTick; }
}
public double TotalHours {
get { return (double)_ticks * HoursPerTick; }
}
public double TotalMilliseconds {
get {
double temp = (double)_ticks * MillisecondsPerTick;
if (temp > MaxMilliSeconds)
return (double)MaxMilliSeconds;
if (temp < MinMilliSeconds)
return (double)MinMilliSeconds;
return temp;
}
}
public double TotalMinutes {
get { return (double)_ticks * MinutesPerTick; }
}
public double TotalSeconds {
get { return (double)_ticks * SecondsPerTick; }
}
public TimeSpan Add(TimeSpan ts) {
long result = _ticks + ts._ticks;
// Overflow if signs of operands was identical and result's
// sign was opposite.
// >> 63 gives the sign bit (either 64 1's or 64 0's).
if ((_ticks >> 63 == ts._ticks >> 63) && (_ticks >> 63 != result >> 63))
throw new OverflowException(Environment.GetResourceString("Overflow_TimeSpanTooLong"));
return new TimeSpan(result);
}
// Compares two TimeSpan values, returning an integer that indicates their
// relationship.
//
public static int Compare(TimeSpan t1, TimeSpan t2) {
if (t1._ticks > t2._ticks) return 1;
if (t1._ticks < t2._ticks) return -1;
return 0;
}
// Returns a value less than zero if this object
public int CompareTo(Object value) {
if (value == null) return 1;
if (!(value is TimeSpan))
throw new ArgumentException(Environment.GetResourceString("Arg_MustBeTimeSpan"));
long t = ((TimeSpan)value)._ticks;
if (_ticks > t) return 1;
if (_ticks < t) return -1;
return 0;
}
#if GENERICS_WORK
public int CompareTo(TimeSpan value) {
long t = value._ticks;
if (_ticks > t) return 1;
if (_ticks < t) return -1;
return 0;
}
#endif
public static TimeSpan FromDays(double value) {
return Interval(value, MillisPerDay);
}
public TimeSpan Duration() {
if (_ticks==TimeSpan.MinValue._ticks)
throw new OverflowException(Environment.GetResourceString("Overflow_Duration"));
return new TimeSpan(_ticks >= 0? _ticks: -_ticks);
}
public override bool Equals(Object value) {
if (value is TimeSpan) {
return _ticks == ((TimeSpan)value)._ticks;
}
return false;
}
public bool Equals(TimeSpan obj)
{
return _ticks == obj._ticks;
}
public static bool Equals(TimeSpan t1, TimeSpan t2) {
return t1._ticks == t2._ticks;
}
public override int GetHashCode() {
return (int)_ticks ^ (int)(_ticks >> 32);
}
public static TimeSpan FromHours(double value) {
return Interval(value, MillisPerHour);
}
private static TimeSpan Interval(double value, int scale) {
if (Double.IsNaN(value))
throw new ArgumentException(Environment.GetResourceString("Arg_CannotBeNaN"));
double tmp = value * scale;
double millis = tmp + (value >= 0? 0.5: -0.5);
if ((millis > Int64.MaxValue / TicksPerMillisecond) || (millis < Int64.MinValue / TicksPerMillisecond))
throw new OverflowException(Environment.GetResourceString("Overflow_TimeSpanTooLong"));
return new TimeSpan((long)millis * TicksPerMillisecond);
}
public static TimeSpan FromMilliseconds(double value) {
return Interval(value, 1);
}
public static TimeSpan FromMinutes(double value) {
return Interval(value, MillisPerMinute);
}
public TimeSpan Negate() {
if (_ticks==TimeSpan.MinValue._ticks)
throw new OverflowException(Environment.GetResourceString("Overflow_NegateTwosCompNum"));
return new TimeSpan(-_ticks);
}
// Constructs a TimeSpan from a string. Leading and trailing white
// space characters are allowed.
//
public static TimeSpan Parse(String s) {
return new TimeSpan(new StringParser().Parse(s));
}
public static Boolean TryParse(String s, out TimeSpan result) {
long longResult;
if (new StringParser().TryParse(s, out longResult)) {
result = new TimeSpan(longResult);
return true;
}
else {
result = TimeSpan.Zero;
return false;
}
}
public static TimeSpan FromSeconds(double value) {
return Interval(value, MillisPerSecond);
}
public TimeSpan Subtract(TimeSpan ts) {
long result = _ticks - ts._ticks;
// Overflow if signs of operands was different and result's
// sign was opposite from the first argument's sign.
// >> 63 gives the sign bit (either 64 1's or 64 0's).
if ((_ticks >> 63 != ts._ticks >> 63) && (_ticks >> 63 != result >> 63))
throw new OverflowException(Environment.GetResourceString("Overflow_TimeSpanTooLong"));
return new TimeSpan(result);
}
public static TimeSpan FromTicks(long value) {
return new TimeSpan(value);
}
internal static long TimeToTicks(int hour, int minute, int second) {
// totalSeconds is bounded by 2^31 * 2^12 + 2^31 * 2^8 + 2^31,
// which is less than 2^44, meaning we won't overflow totalSeconds.
long totalSeconds = (long)hour * 3600 + (long)minute * 60 + (long)second;
if (totalSeconds > MaxSeconds || totalSeconds < MinSeconds)
throw new ArgumentOutOfRangeException(null, Environment.GetResourceString("Overflow_TimeSpanTooLong"));
return totalSeconds * TicksPerSecond;
}
private String IntToString(int n, int digits) {
return ParseNumbers.IntToString(n, 10, digits, '0', 0);
}
public override String ToString() {
StringBuilder sb = new StringBuilder();
int day = (int)(_ticks / TicksPerDay);
long time = _ticks % TicksPerDay;
if (_ticks < 0) {
sb.Append("-");
day = -day;
time = -time;
}
if (day != 0) {
sb.Append(day);
sb.Append(".");
}
sb.Append(IntToString((int)(time / TicksPerHour % 24), 2));
sb.Append(":");
sb.Append(IntToString((int)(time / TicksPerMinute % 60), 2));
sb.Append(":");
sb.Append(IntToString((int)(time / TicksPerSecond % 60), 2));
int t = (int)(time % TicksPerSecond);
if (t != 0) {
sb.Append(".");
sb.Append(IntToString(t, 7));
}
return sb.ToString();
}
public static TimeSpan operator -(TimeSpan t) {
if (t._ticks==TimeSpan.MinValue._ticks)
throw new OverflowException(Environment.GetResourceString("Overflow_NegateTwosCompNum"));
return new TimeSpan(-t._ticks);
}
public static TimeSpan operator -(TimeSpan t1, TimeSpan t2) {
return t1.Subtract(t2);
}
public static TimeSpan operator +(TimeSpan t) {
return t;
}
public static TimeSpan operator +(TimeSpan t1, TimeSpan t2) {
return t1.Add(t2);
}
public static bool operator ==(TimeSpan t1, TimeSpan t2) {
return t1._ticks == t2._ticks;
}
public static bool operator !=(TimeSpan t1, TimeSpan t2) {
return t1._ticks != t2._ticks;
}
public static bool operator <(TimeSpan t1, TimeSpan t2) {
return t1._ticks < t2._ticks;
}
public static bool operator <=(TimeSpan t1, TimeSpan t2) {
return t1._ticks <= t2._ticks;
}
public static bool operator >(TimeSpan t1, TimeSpan t2) {
return t1._ticks > t2._ticks;
}
public static bool operator >=(TimeSpan t1, TimeSpan t2) {
return t1._ticks >= t2._ticks;
}
private struct StringParser {
private enum ParseError {
Format = 1,
Overflow = 2,
OverflowHoursMinutesSeconds = 3,
ArgumentNull = 4,
}
private String str;
private char ch;
private int pos;
private int len;
private ParseError error;
internal void NextChar() {
if (pos < len) pos++;
ch = pos < len? str[pos]: (char) 0;
}
internal char NextNonDigit() {
int i = pos;
while (i < len) {
char ch = str[i];
if (ch < '0' || ch > '9') return ch;
i++;
}
return (char) 0;
}
internal long Parse(String s) {
long value;
if (TryParse(s, out value)) {
return value;
}
else {
switch (error) {
case ParseError.ArgumentNull:
throw new ArgumentNullException("s");
case ParseError.Format:
throw new FormatException(Environment.GetResourceString("Format_InvalidString"));
case ParseError.Overflow:
throw new OverflowException(Environment.GetResourceString("Overflow_TimeSpanTooLong"));
case ParseError.OverflowHoursMinutesSeconds:
throw new OverflowException(Environment.GetResourceString("Overflow_TimeSpanElementTooLarge"));
default:
BCLDebug.Assert(false, "Unknown error: " + error.ToString());
return 0;
}
}
}
internal bool TryParse(String s, out long value) {
value = 0;
if (s == null) {
error = ParseError.ArgumentNull;
return false;
}
str = s;
len = s.Length;
pos = -1;
NextChar();
SkipBlanks();
bool negative = false;
if (ch == '-') {
negative = true;
NextChar();
}
long time;
if (NextNonDigit() == ':') {
if (!ParseTime(out time)) {
return false;
};
}
else {
int days;
if (!ParseInt((int)(0x7FFFFFFFFFFFFFFFL / TicksPerDay), out days)) {
return false;
}
time = days * TicksPerDay;
if (ch == '.') {
NextChar();
long remainingTime;
if (!ParseTime(out remainingTime)) {
return false;
};
time += remainingTime;
}
}
if (negative) {
time = -time;
// Allow -0 as well
if (time > 0) {
error = ParseError.Overflow;
return false;
}
}
else {
if (time < 0) {
error = ParseError.Overflow;
return false;
}
}
SkipBlanks();
if (pos < len) {
error = ParseError.Format;
return false;
}
value = time;
return true;
}
internal bool ParseInt(int max, out int i) {
i = 0;
int p = pos;
while (ch >= '0' && ch <= '9') {
if ((i & 0xF0000000) != 0) {
error = ParseError.Overflow;
return false;
}
i = i * 10 + ch - '0';
if (i < 0) {
error = ParseError.Overflow;
return false;
}
NextChar();
}
if (p == pos) {
error = ParseError.Format;
return false;
}
if (i > max) {
error = ParseError.Overflow;
return false;
}
return true;
}
internal bool ParseTime(out long time) {
time = 0;
int unit;
if (!ParseInt(23, out unit)) {
if (error == ParseError.Overflow) {
error = ParseError.OverflowHoursMinutesSeconds;
}
return false;
}
time = unit * TicksPerHour;
if (ch != ':') {
error = ParseError.Format;
return false;
}
NextChar();
if (!ParseInt(59, out unit)) {
if (error == ParseError.Overflow) {
error = ParseError.OverflowHoursMinutesSeconds;
}
return false;
}
time += unit * TicksPerMinute;
if (ch == ':') {
NextChar();
// allow seconds with the leading zero
if (ch != '.') {
if (!ParseInt(59, out unit)) {
if (error == ParseError.Overflow) {
error = ParseError.OverflowHoursMinutesSeconds;
}
return false;
}
time += unit * TicksPerSecond;
}
if (ch == '.') {
NextChar();
int f = (int)TicksPerSecond;
while (f > 1 && ch >= '0' && ch <= '9') {
f /= 10;
time += (ch - '0') * f;
NextChar();
}
}
}
return true;
}
internal void SkipBlanks() {
while (ch == ' ' || ch == '\t') NextChar();
}
}
}
}
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