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OpenSimMirror/OpenSim/Framework/Util.cs

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/*
* Copyright (c) Contributors, http://opensimulator.org/
* See CONTRIBUTORS.TXT for a full list of copyright holders.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the OpenSimulator Project nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Diagnostics;
using System.Drawing;
using System.Drawing.Imaging;
using System.Globalization;
using System.IO;
using System.IO.Compression;
using System.Net;
using System.Net.Sockets;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Binary;
using System.Security.Cryptography;
using System.Text;
using System.Text.RegularExpressions;
using System.Xml;
using System.Threading;
using log4net;
using log4net.Appender;
using Nini.Config;
using Nwc.XmlRpc;
using OpenMetaverse;
using OpenMetaverse.StructuredData;
using Amib.Threading;
using System.Collections.Concurrent;
using System.Collections.Specialized;
using System.Web;
namespace OpenSim.Framework
{
[Flags]
public enum PermissionMask : uint
{
None = 0,
// folded perms
FoldedTransfer = 1,
FoldedModify = 1 << 1,
FoldedCopy = 1 << 2,
FoldedExport = 1 << 3,
// DO NOT USE THIS FOR NEW WORK. IT IS DEPRECATED AND
// EXISTS ONLY TO REACT TO EXISTING OBJECTS HAVING IT.
// NEW CODE SHOULD NEVER SET THIS BIT!
// Use InventoryItemFlags.ObjectSlamPerm in the Flags field of
// this legacy slam bit. It comes from prior incomplete
// understanding of the code and the prohibition on
// reading viewer code that used to be in place.
Slam = (1 << 4),
FoldedMask = 0x0f,
FoldingShift = 13 , // number of bit shifts from normal perm to folded or back (same as Transfer shift below)
// when doing as a block
Transfer = 1 << 13, // 0x02000
Modify = 1 << 14, // 0x04000
Copy = 1 << 15, // 0x08000
Export = 1 << 16, // 0x10000
Move = 1 << 19, // 0x80000
Damage = 1 << 20, // 0x100000 does not seem to be in use
// All does not contain Export, which is special and must be
// explicitly given
All = 0x8e000,
AllAndExport = 0x9e000,
AllAndExportNoMod = 0x9a000,
AllEffective = 0x9e000,
UnfoldedMask = 0x1e000
}
/// <summary>
/// The method used by Util.FireAndForget for asynchronously firing events
/// </summary>
/// <remarks>
/// None is used to execute the method in the same thread that made the call. It should only be used by regression
/// test code that relies on predictable event ordering.
/// RegressionTest is used by regression tests. It fires the call synchronously and does not catch any exceptions.
/// </remarks>
public enum FireAndForgetMethod
{
None,
RegressionTest,
QueueUserWorkItem,
SmartThreadPool,
Thread,
}
/// <summary>
/// Class for delivering SmartThreadPool statistical information
/// </summary>
/// <remarks>
/// We do it this way so that we do not directly expose STP.
/// </remarks>
public class STPInfo
{
public string Name { get; set; }
public STPStartInfo STPStartInfo { get; set; }
public WIGStartInfo WIGStartInfo { get; set; }
public bool IsIdle { get; set; }
public bool IsShuttingDown { get; set; }
public int MaxThreads { get; set; }
public int MinThreads { get; set; }
public int InUseThreads { get; set; }
public int ActiveThreads { get; set; }
public int WaitingCallbacks { get; set; }
public int MaxConcurrentWorkItems { get; set; }
}
/// <summary>
/// Miscellaneous utility functions
/// </summary>
public static class Util
{
private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
/// <summary>
/// Log-level for the thread pool:
/// 0 = no logging
/// 1 = only first line of stack trace; don't log common threads
/// 2 = full stack trace; don't log common threads
/// 3 = full stack trace, including common threads
/// </summary>
public static int LogThreadPool { get; set; }
public static bool LogOverloads { get; set; }
public static readonly int MAX_THREADPOOL_LEVEL = 3;
public static double TimeStampClockPeriodMS;
public static double TimeStampClockPeriod;
static Util()
{
LogThreadPool = 0;
LogOverloads = true;
TimeStampClockPeriod = 1.0D/ (double)Stopwatch.Frequency;
TimeStampClockPeriodMS = 1e3 * TimeStampClockPeriod;
m_log.InfoFormat("[UTIL] TimeStamp clock with period of {0}ms", Math.Round(TimeStampClockPeriodMS,6,MidpointRounding.AwayFromZero));
}
private static uint nextXferID = 5000;
private static Random randomClass = new ThreadSafeRandom();
// Get a list of invalid file characters (OS dependent)
private static string regexInvalidFileChars = "[" + new String(Path.GetInvalidFileNameChars()) + "]";
private static string regexInvalidPathChars = "[" + new String(Path.GetInvalidPathChars()) + "]";
private static object XferLock = new object();
/// <summary>
/// Thread pool used for Util.FireAndForget if FireAndForgetMethod.SmartThreadPool is used
/// </summary>
private static SmartThreadPool m_ThreadPool;
// Watchdog timer that aborts threads that have timed-out
private static Timer m_threadPoolWatchdog;
// Unix-epoch starts at January 1st 1970, 00:00:00 UTC. And all our times in the server are (or at least should be) in UTC.
public static readonly DateTime UnixEpoch =
DateTime.ParseExact("1970-01-01 00:00:00 +0", "yyyy-MM-dd hh:mm:ss z", DateTimeFormatInfo.InvariantInfo).ToUniversalTime();
private static readonly string rawUUIDPattern
= "[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}";
public static readonly Regex PermissiveUUIDPattern = new Regex(rawUUIDPattern);
public static readonly Regex UUIDPattern = new Regex(string.Format("^{0}$", rawUUIDPattern));
public static FireAndForgetMethod DefaultFireAndForgetMethod = FireAndForgetMethod.SmartThreadPool;
public static FireAndForgetMethod FireAndForgetMethod = DefaultFireAndForgetMethod;
public static bool IsPlatformMono
{
get { return Type.GetType("Mono.Runtime") != null; }
}
/// <summary>
/// Gets the name of the directory where the current running executable
/// is located
/// </summary>
/// <returns>Filesystem path to the directory containing the current
/// executable</returns>
public static string ExecutingDirectory()
{
return Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
}
/// <summary>
/// Linear interpolates B<->C using percent A
/// </summary>
/// <param name="a"></param>
/// <param name="b"></param>
/// <param name="c"></param>
/// <returns></returns>
public static double lerp(double a, double b, double c)
{
return (b*a) + (c*(1 - a));
}
/// <summary>
/// Bilinear Interpolate, see Lerp but for 2D using 'percents' X & Y.
/// Layout:
/// A B
/// C D
/// A<->C = Y
/// C<->D = X
/// </summary>
/// <param name="x"></param>
/// <param name="y"></param>
/// <param name="a"></param>
/// <param name="b"></param>
/// <param name="c"></param>
/// <param name="d"></param>
/// <returns></returns>
public static double lerp2D(double x, double y, double a, double b, double c, double d)
{
return lerp(y, lerp(x, a, b), lerp(x, c, d));
}
public static Encoding UTF8 = Encoding.UTF8;
public static Encoding UTF8NoBomEncoding = new UTF8Encoding(false);
/// <value>
/// Well known UUID for the blank texture used in the Linden SL viewer version 1.20 (and hopefully onwards)
/// </value>
public static UUID BLANK_TEXTURE_UUID = new UUID("5748decc-f629-461c-9a36-a35a221fe21f");
#region Vector Equations
/// <summary>
/// Get the distance between two 3d vectors
/// </summary>
/// <param name="a">A 3d vector</param>
/// <param name="b">A 3d vector</param>
/// <returns>The distance between the two vectors</returns>
public static double GetDistanceTo(Vector3 a, Vector3 b)
{
return Vector3.Distance(a,b);
}
/// <summary>
/// Returns true if the distance beween A and B is less than amount. Significantly faster than GetDistanceTo since it eliminates the Sqrt.
/// </summary>
/// <param name="a"></param>
/// <param name="b"></param>
/// <param name="amount"></param>
/// <returns></returns>
public static bool DistanceLessThan(Vector3 a, Vector3 b, double amount)
{
return Vector3.DistanceSquared(a,b) < (amount * amount);
}
/// <summary>
/// Get the magnitude of a 3d vector
/// </summary>
/// <param name="a">A 3d vector</param>
/// <returns>The magnitude of the vector</returns>
public static double GetMagnitude(Vector3 a)
{
return Math.Sqrt((a.X * a.X) + (a.Y * a.Y) + (a.Z * a.Z));
}
/// <summary>
/// Get a normalized form of a 3d vector
/// </summary>
/// <param name="a">A 3d vector</param>
/// <returns>A new vector which is normalized form of the vector</returns>
public static Vector3 GetNormalizedVector(Vector3 a)
{
Vector3 v = new Vector3(a.X, a.Y, a.Z);
v.Normalize();
return v;
}
/// <summary>
/// Returns if a vector is a zero vector (has all zero components)
/// </summary>
/// <returns></returns>
public static bool IsZeroVector(Vector3 v)
{
if (v.X == 0 && v.Y == 0 && v.Z == 0)
{
return true;
}
return false;
}
# endregion
public static Quaternion Axes2Rot(Vector3 fwd, Vector3 left, Vector3 up)
{
float s;
float tr = (float) (fwd.X + left.Y + up.Z + 1.0);
if (tr >= 1.0)
{
s = (float) (0.5 / Math.Sqrt(tr));
return new Quaternion(
(left.Z - up.Y) * s,
(up.X - fwd.Z) * s,
(fwd.Y - left.X) * s,
(float) 0.25 / s);
}
else
{
float max = (left.Y > up.Z) ? left.Y : up.Z;
if (max < fwd.X)
{
s = (float) (Math.Sqrt(fwd.X - (left.Y + up.Z) + 1.0));
float x = (float) (s * 0.5);
s = (float) (0.5 / s);
return new Quaternion(
x,
(fwd.Y + left.X) * s,
(up.X + fwd.Z) * s,
(left.Z - up.Y) * s);
}
else if (max == left.Y)
{
s = (float) (Math.Sqrt(left.Y - (up.Z + fwd.X) + 1.0));
float y = (float) (s * 0.5);
s = (float) (0.5 / s);
return new Quaternion(
(fwd.Y + left.X) * s,
y,
(left.Z + up.Y) * s,
(up.X - fwd.Z) * s);
}
else
{
s = (float) (Math.Sqrt(up.Z - (fwd.X + left.Y) + 1.0));
float z = (float) (s * 0.5);
s = (float) (0.5 / s);
return new Quaternion(
(up.X + fwd.Z) * s,
(left.Z + up.Y) * s,
z,
(fwd.Y - left.X) * s);
}
}
}
public static Random RandomClass
{
get { return randomClass; }
}
[System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]
public static ulong UIntsToLong(uint X, uint Y)
{
return ((ulong)X << 32) | (ulong)Y;
}
// Regions are identified with a 'handle' made up of its world coordinates packed into a ulong.
// Region handles are based on the coordinate of the region corner with lower X and Y
// var regions need more work than this to get that right corner from a generic world position
// this corner must be on a grid point
[System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]
public static ulong RegionWorldLocToHandle(uint X, uint Y)
{
ulong handle = X & 0xffffff00; // make sure it matchs grid coord points.
handle <<= 32; // to higher half
handle |= (Y & 0xffffff00);
return handle;
}
[System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]
public static ulong RegionGridLocToHandle(uint X, uint Y)
{
ulong handle = X;
handle <<= 40; // shift to higher half and mult by 256)
handle |= (Y << 8); // mult by 256)
return handle;
}
[System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]
public static void RegionHandleToWorldLoc(ulong handle, out uint X, out uint Y)
{
X = (uint)(handle >> 32);
Y = (uint)(handle & 0xfffffffful);
}
[System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]
public static void RegionHandleToRegionLoc(ulong handle, out uint X, out uint Y)
{
X = (uint)(handle >> 40) & 0x00ffffffu; // bring from higher half, divide by 256 and clean
Y = (uint)(handle >> 8) & 0x00ffffffu; // divide by 256 and clean
// if you trust the uint cast then the clean can be removed.
}
// A region location can be 'world coordinates' (meters) or 'region grid coordinates'
// grid coordinates have a fixed step of 256m as defined by viewers
[System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]
public static uint WorldToRegionLoc(uint worldCoord)
{
return worldCoord >> 8;
}
// Convert a region's 'region grid coordinate' to its 'world coordinate'.
[System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]
public static uint RegionToWorldLoc(uint regionCoord)
{
return regionCoord << 8;
}
public static bool checkServiceURI(string uristr, out string serviceURI, out string serviceHost, out string serviceIPstr)
{
serviceURI = string.Empty;
serviceHost = string.Empty;
serviceIPstr = string.Empty;
try
{
Uri uri = new Uri(uristr);
serviceURI = uri.AbsoluteUri;
if(uri.Port == 80)
serviceURI = serviceURI.Trim(new char[] { '/', ' ' }) +":80/";
else if(uri.Port == 443)
serviceURI = serviceURI.Trim(new char[] { '/', ' ' }) +":443/";
serviceHost = uri.Host;
IPEndPoint ep = Util.getEndPoint(serviceHost,uri.Port);
if(ep == null)
return false;
serviceIPstr = ep.Address.ToString();
return true;
}
catch
{
serviceURI = string.Empty;
}
return false;
}
public static bool buildHGRegionURI(string inputName, out string serverURI, out string serverHost, out string regionName)
{
serverURI = string.Empty;
serverHost = string.Empty;
regionName = string.Empty;
inputName = inputName.Trim();
if (!inputName.StartsWith("http") && !inputName.StartsWith("https"))
{
// Formats: grid.example.com:8002:region name
// grid.example.com:region name
// grid.example.com:8002
// grid.example.com
string host;
uint port = 80;
string[] parts = inputName.Split(new char[] { ':' });
int indx;
if(parts.Length == 0)
return false;
if (parts.Length == 1)
{
indx = inputName.IndexOf('/');
if (indx < 0)
serverURI = "http://"+ inputName + "/";
else
{
serverURI = "http://"+ inputName.Substring(0,indx + 1);
if(indx + 2 < inputName.Length)
regionName = inputName.Substring(indx + 1);
}
}
else
{
host = parts[0];
if (parts.Length >= 2)
{
indx = parts[1].IndexOf('/');
if(indx < 0)
{
// If it's a number then assume it's a port. Otherwise, it's a region name.
if (!UInt32.TryParse(parts[1], out port))
{
port = 80;
regionName = parts[1];
}
}
else
{
string portstr = parts[1].Substring(0, indx);
if(indx + 2 < parts[1].Length)
regionName = parts[1].Substring(indx + 1);
if (!UInt32.TryParse(portstr, out port))
port = 80;
}
}
// always take the last one
if (parts.Length >= 3)
{
regionName = parts[2];
}
serverURI = "http://"+ host +":"+ port.ToString() + "/";
}
}
else
{
// Formats: http://grid.example.com region name
// http://grid.example.com "region name"
// http://grid.example.com
string[] parts = inputName.Split(new char[] { ' ' });
if (parts.Length == 0)
return false;
serverURI = parts[0];
int indx = serverURI.LastIndexOf('/');
if(indx > 10)
{
if(indx + 2 < inputName.Length)
regionName = inputName.Substring(indx + 1);
serverURI = inputName.Substring(0, indx + 1);
}
else if (parts.Length >= 2)
{
regionName = inputName.Substring(serverURI.Length);
}
}
// use better code for sanity check
Uri uri;
try
{
uri = new Uri(serverURI);
}
catch
{
return false;
}
if(!string.IsNullOrEmpty(regionName))
regionName = regionName.Trim(new char[] { '"', ' ' });
serverURI = uri.AbsoluteUri;
if(uri.Port == 80)
serverURI = serverURI.Trim(new char[] { '/', ' ' }) +":80/";
else if(uri.Port == 443)
serverURI = serverURI.Trim(new char[] { '/', ' ' }) +":443/";
serverHost = uri.Host;
return true;
}
public static T Clamp<T>(T x, T min, T max)
where T : IComparable<T>
{
return x.CompareTo(max) > 0 ? max :
x.CompareTo(min) < 0 ? min :
x;
}
// Clamp the maximum magnitude of a vector
[System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]
public static Vector3 ClampV(Vector3 x, float max)
{
float lenSq = x.LengthSquared();
if (lenSq > (max * max))
{
lenSq = max / (float)Math.Sqrt(lenSq);
x = x * lenSq;
}
return x;
}
/// <summary>
/// Check if any of the values in a Vector3 are NaN or Infinity
/// </summary>
/// <param name="v">Vector3 to check</param>
/// <returns></returns>
public static bool IsNanOrInfinity(Vector3 v)
{
if (float.IsNaN(v.X) || float.IsNaN(v.Y) || float.IsNaN(v.Z))
return true;
if (float.IsInfinity(v.X) || float.IsInfinity(v.Y) || float.IsNaN(v.Z))
return true;
return false;
}
// Inclusive, within range test (true if equal to the endpoints)
public static bool InRange<T>(T x, T min, T max)
where T : IComparable<T>
{
return x.CompareTo(max) <= 0 && x.CompareTo(min) >= 0;
}
public static uint GetNextXferID()
{
uint id = 0;
lock (XferLock)
{
id = nextXferID;
nextXferID++;
}
return id;
}
public static string GetFileName(string file)
{
// Return just the filename on UNIX platforms
// TODO: this should be customisable with a prefix, but that's something to do later.
if (Environment.OSVersion.Platform == PlatformID.Unix)
{
return file;
}
// Return %APPDATA%/OpenSim/file for 2K/XP/NT/2K3/VISTA
// TODO: Switch this to System.Enviroment.SpecialFolders.ApplicationData
if (Environment.OSVersion.Platform == PlatformID.Win32NT)
{
if (!Directory.Exists("%APPDATA%\\OpenSim\\"))
{
Directory.CreateDirectory("%APPDATA%\\OpenSim");
}
return "%APPDATA%\\OpenSim\\" + file;
}
// Catch all - covers older windows versions
// (but those probably wont work anyway)
return file;
}
/// <summary>
/// Debug utility function to convert OSD into formatted XML for debugging purposes.
/// </summary>
/// <param name="osd">
/// A <see cref="OSD"/>
/// </param>
/// <returns>
/// A <see cref="System.String"/>
/// </returns>
public static string GetFormattedXml(OSD osd)
{
return GetFormattedXml(OSDParser.SerializeLLSDXmlString(osd));
}
/// <summary>
/// Debug utility function to convert unbroken strings of XML into something human readable for occasional debugging purposes.
/// </summary>
/// <remarks>
/// Please don't delete me even if I appear currently unused!
/// </remarks>
/// <param name="rawXml"></param>
/// <returns></returns>
public static string GetFormattedXml(string rawXml)
{
XmlDocument xd = new XmlDocument();
xd.LoadXml(rawXml);
StringBuilder sb = new StringBuilder();
StringWriter sw = new StringWriter(sb);
XmlTextWriter xtw = new XmlTextWriter(sw);
xtw.Formatting = Formatting.Indented;
try
{
xd.WriteTo(xtw);
}
finally
{
xtw.Close();
}
return sb.ToString();
}
public static byte[] DocToBytes(XmlDocument doc)
{
using (MemoryStream ms = new MemoryStream())
using (XmlTextWriter xw = new XmlTextWriter(ms, null))
{
xw.Formatting = Formatting.Indented;
doc.WriteTo(xw);
xw.Flush();
return ms.ToArray();
}
}
/// <summary>
/// Is the platform Windows?
/// </summary>
/// <returns>true if so, false otherwise</returns>
public static bool IsWindows()
{
PlatformID platformId = Environment.OSVersion.Platform;
return (platformId == PlatformID.Win32NT
|| platformId == PlatformID.Win32S
|| platformId == PlatformID.Win32Windows
|| platformId == PlatformID.WinCE);
}
public static bool LoadArchSpecificWindowsDll(string libraryName)
{
return LoadArchSpecificWindowsDll(libraryName, string.Empty);
}
public static bool LoadArchSpecificWindowsDll(string libraryName, string path)
{
// We do this so that OpenSimulator on Windows loads the correct native library depending on whether
// it's running as a 32-bit process or a 64-bit one. By invoking LoadLibary here, later DLLImports
// will find it already loaded later on.
//
// This isn't necessary for other platforms (e.g. Mac OSX and Linux) since the DLL used can be
// controlled in config files.
string nativeLibraryPath;
if (Util.Is64BitProcess())
nativeLibraryPath = Path.Combine(Path.Combine(path, "lib64"), libraryName);
else
nativeLibraryPath = Path.Combine(Path.Combine(path, "lib32"), libraryName);
m_log.DebugFormat("[UTIL]: Loading native Windows library at {0}", nativeLibraryPath);
if (Util.LoadLibrary(nativeLibraryPath) == IntPtr.Zero)
{
m_log.ErrorFormat(
"[UTIL]: Couldn't find native Windows library at {0}", nativeLibraryPath);
return false;
}
else
{
return true;
}
}
public static bool IsEnvironmentSupported(ref string reason)
{
// Must have .NET 2.0 (Generics / libsl)
if (Environment.Version.Major < 2)
{
reason = ".NET 1.0/1.1 lacks components that is used by OpenSim";
return false;
}
// Windows 95/98/ME are unsupported
if (Environment.OSVersion.Platform == PlatformID.Win32Windows &&
Environment.OSVersion.Platform != PlatformID.Win32NT)
{
reason = "Windows 95/98/ME will not run OpenSim";
return false;
}
// Windows 2000 / Pre-SP2 XP
if (Environment.OSVersion.Version.Major == 5 &&
Environment.OSVersion.Version.Minor == 0)
{
reason = "Please update to Windows XP Service Pack 2 or Server2003";
return false;
}
return true;
}
public static int UnixTimeSinceEpoch()
{
return ToUnixTime(DateTime.UtcNow);
}
public static int ToUnixTime(DateTime stamp)
{
TimeSpan t = stamp.ToUniversalTime() - UnixEpoch;
return (int)t.TotalSeconds;
}
public static DateTime ToDateTime(ulong seconds)
{
return UnixEpoch.AddSeconds(seconds);
}
public static DateTime ToDateTime(int seconds)
{
return UnixEpoch.AddSeconds(seconds);
}
/// <summary>
/// Return an md5 hash of the given string
/// </summary>
/// <param name="data"></param>
/// <returns></returns>
public static string Md5Hash(string data)
{
return Md5Hash(data, Encoding.Default);
}
public static string Md5Hash(string data, Encoding encoding)
{
byte[] dataMd5 = ComputeMD5Hash(data, encoding);
StringBuilder sb = new StringBuilder();
for (int i = 0; i < dataMd5.Length; i++)
sb.AppendFormat("{0:x2}", dataMd5[i]);
return sb.ToString();
}
private static byte[] ComputeMD5Hash(string data, Encoding encoding)
{
using(MD5 md5 = MD5.Create())
return md5.ComputeHash(encoding.GetBytes(data));
}
/// <summary>
/// Return an SHA1 hash
/// </summary>
/// <param name="data"></param>
/// <returns></returns>
public static string SHA1Hash(string data, Encoding enc)
{
return SHA1Hash(enc.GetBytes(data));
}
public static string SHA1Hash(string data)
{
return SHA1Hash(Encoding.Default.GetBytes(data));
}
/// <summary>
/// Return an SHA1 hash
/// </summary>
/// <param name="data"></param>
/// <returns></returns>
public static string SHA1Hash(byte[] data)
{
byte[] hash = ComputeSHA1Hash(data);
return BitConverter.ToString(hash).Replace("-", String.Empty);
}
private static byte[] ComputeSHA1Hash(byte[] src)
{
byte[] ret;
using (SHA1CryptoServiceProvider SHA1 = new SHA1CryptoServiceProvider())
ret = SHA1.ComputeHash(src);
return ret;
}
public static UUID ComputeSHA1UUID(string src)
{
return ComputeSHA1UUID(Encoding.Default.GetBytes(src));
}
public static UUID ComputeSHA1UUID(byte[] src)
{
byte[] ret;
using (SHA1CryptoServiceProvider SHA1 = new SHA1CryptoServiceProvider())
ret = SHA1.ComputeHash(src);
return new UUID(ret, 2);
}
public static int fast_distance2d(int x, int y)
{
x = Math.Abs(x);
y = Math.Abs(y);
int min = Math.Min(x, y);
return (x + y - (min >> 1) - (min >> 2) + (min >> 4));
}
/// <summary>
/// Determines whether a point is inside a bounding box.
/// </summary>
/// <param name='v'></param>
/// <param name='min'></param>
/// <param name='max'></param>
/// <returns></returns>
public static bool IsInsideBox(Vector3 v, Vector3 min, Vector3 max)
{
return v.X >= min.X && v.Y >= min.Y && v.Z >= min.Z
&& v.X <= max.X && v.Y <= max.Y && v.Z <= max.Z;
}
/// <summary>
/// Are the co-ordinates of the new region visible from the old region?
/// </summary>
/// <param name="oldx">Old region x-coord</param>
/// <param name="newx">New region x-coord</param>
/// <param name="oldy">Old region y-coord</param>
/// <param name="newy">New region y-coord</param>
/// <returns></returns>
public static bool IsOutsideView(float drawdist, uint oldx, uint newx, uint oldy, uint newy,
int oldsizex, int oldsizey, int newsizex, int newsizey)
{
// we still need to make sure we see new region 1stNeighbors
drawdist--;
oldx *= Constants.RegionSize;
newx *= Constants.RegionSize;
if (oldx + oldsizex + drawdist < newx)
return true;
if (newx + newsizex + drawdist < oldx)
return true;
oldy *= Constants.RegionSize;
newy *= Constants.RegionSize;
if (oldy + oldsizey + drawdist < newy)
return true;
if (newy + newsizey + drawdist < oldy)
return true;
return false;
}
public static string FieldToString(byte[] bytes)
{
return FieldToString(bytes, String.Empty);
}
/// <summary>
/// Convert a variable length field (byte array) to a string, with a
/// field name prepended to each line of the output
/// </summary>
/// <remarks>If the byte array has unprintable characters in it, a
/// hex dump will be put in the string instead</remarks>
/// <param name="bytes">The byte array to convert to a string</param>
/// <param name="fieldName">A field name to prepend to each line of output</param>
/// <returns>An ASCII string or a string containing a hex dump, minus
/// the null terminator</returns>
public static string FieldToString(byte[] bytes, string fieldName)
{
// Check for a common case
if (bytes.Length == 0) return String.Empty;
StringBuilder output = new StringBuilder();
bool printable = true;
for (int i = 0; i < bytes.Length; ++i)
{
// Check if there are any unprintable characters in the array
if ((bytes[i] < 0x20 || bytes[i] > 0x7E) && bytes[i] != 0x09
&& bytes[i] != 0x0D && bytes[i] != 0x0A && bytes[i] != 0x00)
{
printable = false;
break;
}
}
if (printable)
{
if (fieldName.Length > 0)
{
output.Append(fieldName);
output.Append(": ");
}
output.Append(CleanString(Util.UTF8.GetString(bytes, 0, bytes.Length - 1)));
}
else
{
for (int i = 0; i < bytes.Length; i += 16)
{
if (i != 0)
output.Append(Environment.NewLine);
if (fieldName.Length > 0)
{
output.Append(fieldName);
output.Append(": ");
}
for (int j = 0; j < 16; j++)
{
if ((i + j) < bytes.Length)
output.Append(String.Format("{0:X2} ", bytes[i + j]));
else
output.Append(" ");
}
for (int j = 0; j < 16 && (i + j) < bytes.Length; j++)
{
if (bytes[i + j] >= 0x20 && bytes[i + j] < 0x7E)
output.Append((char) bytes[i + j]);
else
output.Append(".");
}
}
}
return output.ToString();
}
private static ExpiringCache<string,IPAddress> dnscache = new ExpiringCache<string, IPAddress>();
/// <summary>
/// Converts a URL to a IPAddress
/// </summary>
/// <param name="url">URL Standard Format</param>
/// <returns>A resolved IP Address</returns>
public static IPAddress GetHostFromURL(string url)
{
return GetHostFromDNS(url.Split(new char[] {'/', ':'})[3]);
}
/// <summary>
/// Returns a IP address from a specified DNS, favouring IPv4 addresses.
/// </summary>
/// <param name="dnsAddress">DNS Hostname</param>
/// <returns>An IP address, or null</returns>
public static IPAddress GetHostFromDNS(string dnsAddress)
{
if(String.IsNullOrWhiteSpace(dnsAddress))
return null;
IPAddress ia = null;
if(dnscache.TryGetValue(dnsAddress, out ia) && ia != null)
{
dnscache.AddOrUpdate(dnsAddress, ia, 300);
return ia;
}
ia = null;
// If it is already an IP, don't let GetHostEntry see it
if (IPAddress.TryParse(dnsAddress, out ia) && ia != null)
{
if (ia.Equals(IPAddress.Any) || ia.Equals(IPAddress.IPv6Any))
return null;
dnscache.AddOrUpdate(dnsAddress, ia, 300);
return ia;
}
IPHostEntry IPH;
try
{
IPH = Dns.GetHostEntry(dnsAddress);
}
catch // (SocketException e)
{
return null;
}
if(IPH == null || IPH.AddressList.Length == 0)
return null;
ia = null;
foreach (IPAddress Adr in IPH.AddressList)
{
if (ia == null)
ia = Adr;
if (Adr.AddressFamily == AddressFamily.InterNetwork)
{
ia = Adr;
break;
}
}
if(ia != null)
dnscache.AddOrUpdate(dnsAddress, ia, 300);
return ia;
}
public static IPEndPoint getEndPoint(IPAddress ia, int port)
{
if(ia == null)
return null;
IPEndPoint newEP = null;
try
{
newEP = new IPEndPoint(ia, port);
}
catch
{
newEP = null;
}
return newEP;
}
public static IPEndPoint getEndPoint(string hostname, int port)
{
if(String.IsNullOrWhiteSpace(hostname))
return null;
IPAddress ia = null;
if(dnscache.TryGetValue(hostname, out ia) && ia != null)
{
dnscache.AddOrUpdate(hostname, ia, 300);
return getEndPoint(ia, port);
}
ia = null;
// If it is already an IP, don't let GetHostEntry see it
if (IPAddress.TryParse(hostname, out ia) && ia != null)
{
if (ia.Equals(IPAddress.Any) || ia.Equals(IPAddress.IPv6Any))
return null;
dnscache.AddOrUpdate(hostname, ia, 300);
return getEndPoint(ia, port);
}
IPHostEntry IPH;
try
{
IPH = Dns.GetHostEntry(hostname);
}
catch // (SocketException e)
{
return null;
}
if(IPH == null || IPH.AddressList.Length == 0)
return null;
ia = null;
foreach (IPAddress Adr in IPH.AddressList)
{
if (ia == null)
ia = Adr;
if (Adr.AddressFamily == AddressFamily.InterNetwork)
{
ia = Adr;
break;
}
}
if(ia != null)
dnscache.AddOrUpdate(hostname, ia, 300);
return getEndPoint(ia,port);
}
public static Uri GetURI(string protocol, string hostname, int port, string path)
{
return new UriBuilder(protocol, hostname, port, path).Uri;
}
/// <summary>
/// Gets a list of all local system IP addresses
/// </summary>
/// <returns></returns>
public static IPAddress[] GetLocalHosts()
{
return Dns.GetHostAddresses(Dns.GetHostName());
}
public static IPAddress GetLocalHost()
{
IPAddress[] iplist = GetLocalHosts();
if (iplist.Length == 0) // No accessible external interfaces
{
IPAddress[] loopback = Dns.GetHostAddresses("localhost");
IPAddress localhost = loopback[0];
return localhost;
}
foreach (IPAddress host in iplist)
{
if (!IPAddress.IsLoopback(host) && host.AddressFamily == AddressFamily.InterNetwork)
{
return host;
}
}
if (iplist.Length > 0)
{
foreach (IPAddress host in iplist)
{
if (host.AddressFamily == AddressFamily.InterNetwork)
return host;
}
// Well all else failed...
return iplist[0];
}
return null;
}
/// <summary>
/// Parses a foreign asset ID.
/// </summary>
/// <param name="id">A possibly-foreign asset ID: http://grid.example.com:8002/00000000-0000-0000-0000-000000000000 </param>
/// <param name="url">The URL: http://grid.example.com:8002</param>
/// <param name="assetID">The asset ID: 00000000-0000-0000-0000-000000000000. Returned even if 'id' isn't foreign.</param>
/// <returns>True: this is a foreign asset ID; False: it isn't</returns>
public static bool ParseForeignAssetID(string id, out string url, out string assetID)
{
url = String.Empty;
assetID = String.Empty;
UUID uuid;
if (UUID.TryParse(id, out uuid))
{
assetID = uuid.ToString();
return false;
}
if ((id.Length == 0) || (id[0] != 'h' && id[0] != 'H'))
return false;
Uri assetUri;
if (!Uri.TryCreate(id, UriKind.Absolute, out assetUri) || assetUri.Scheme != Uri.UriSchemeHttp)
return false;
// Simian
if (assetUri.Query != string.Empty)
{
NameValueCollection qscoll = HttpUtility.ParseQueryString(assetUri.Query);
assetID = qscoll["id"];
if (assetID != null)
url = id.Replace(assetID, ""); // Malformed again, as simian expects
else
url = id; // !!! best effort
}
else // robust
{
url = "http://" + assetUri.Authority;
assetID = assetUri.LocalPath.Trim(new char[] { '/' });
}
if (!UUID.TryParse(assetID, out uuid))
return false;
return true;
}
/// <summary>
/// Removes all invalid path chars (OS dependent)
/// </summary>
/// <param name="path">path</param>
/// <returns>safe path</returns>
public static string safePath(string path)
{
return Regex.Replace(path, regexInvalidPathChars, String.Empty);
}
/// <summary>
/// Removes all invalid filename chars (OS dependent)
/// </summary>
/// <param name="path">filename</param>
/// <returns>safe filename</returns>
public static string safeFileName(string filename)
{
return Regex.Replace(filename, regexInvalidFileChars, String.Empty);
;
}
//
// directory locations
//
public static string homeDir()
{
string temp;
// string personal=(Environment.GetFolderPath(Environment.SpecialFolder.Personal));
// temp = Path.Combine(personal,".OpenSim");
temp = ".";
return temp;
}
public static string assetsDir()
{
return Path.Combine(configDir(), "assets");
}
public static string inventoryDir()
{
return Path.Combine(configDir(), "inventory");
}
public static string configDir()
{
return ".";
}
public static string dataDir()
{
return ".";
}
public static string logFile()
{
foreach (IAppender appender in LogManager.GetRepository().GetAppenders())
{
if (appender is FileAppender && appender.Name == "LogFileAppender")
{
return ((FileAppender)appender).File;
}
}
return "./OpenSim.log";
}
public static string statsLogFile()
{
foreach (IAppender appender in LogManager.GetRepository().GetAppenders())
{
if (appender is FileAppender && appender.Name == "StatsLogFileAppender")
{
return ((FileAppender)appender).File;
}
}
return "./OpenSimStats.log";
}
public static string logDir()
{
return Path.GetDirectoryName(logFile());
}
// From: http://coercedcode.blogspot.com/2008/03/c-generate-unique-filenames-within.html
public static string GetUniqueFilename(string FileName)
{
int count = 0;
string Name;
if (File.Exists(FileName))
{
FileInfo f = new FileInfo(FileName);
if (!String.IsNullOrEmpty(f.Extension))
{
Name = f.FullName.Substring(0, f.FullName.LastIndexOf('.'));
}
else
{
Name = f.FullName;
}
while (File.Exists(FileName))
{
count++;
FileName = Name + count + f.Extension;
}
}
return FileName;
}
#region Nini (config) related Methods
public static IConfigSource ConvertDataRowToXMLConfig(DataRow row, string fileName)
{
if (!File.Exists(fileName))
{
// create new file
}
XmlConfigSource config = new XmlConfigSource(fileName);
AddDataRowToConfig(config, row);
config.Save();
return config;
}
public static void AddDataRowToConfig(IConfigSource config, DataRow row)
{
config.Configs.Add((string) row[0]);
for (int i = 0; i < row.Table.Columns.Count; i++)
{
config.Configs[(string) row[0]].Set(row.Table.Columns[i].ColumnName, row[i]);
}
}
public static string GetConfigVarWithDefaultSection(IConfigSource config, string varname, string section)
{
// First, check the Startup section, the default section
IConfig cnf = config.Configs["Startup"];
if (cnf == null)
return string.Empty;
string val = cnf.GetString(varname, string.Empty);
// Then check for an overwrite of the default in the given section
if (!string.IsNullOrEmpty(section))
{
cnf = config.Configs[section];
if (cnf != null)
val = cnf.GetString(varname, val);
}
return val;
}
/// <summary>
/// Gets the value of a configuration variable by looking into
/// multiple sections in order. The latter sections overwrite
/// any values previously found.
/// </summary>
/// <typeparam name="T">Type of the variable</typeparam>
/// <param name="config">The configuration object</param>
/// <param name="varname">The configuration variable</param>
/// <param name="sections">Ordered sequence of sections to look at</param>
/// <returns></returns>
public static T GetConfigVarFromSections<T>(IConfigSource config, string varname, string[] sections)
{
return GetConfigVarFromSections<T>(config, varname, sections, default(T));
}
/// <summary>
/// Gets the value of a configuration variable by looking into
/// multiple sections in order. The latter sections overwrite
/// any values previously found.
/// </summary>
/// <remarks>
/// If no value is found then the given default value is returned
/// </remarks>
/// <typeparam name="T">Type of the variable</typeparam>
/// <param name="config">The configuration object</param>
/// <param name="varname">The configuration variable</param>
/// <param name="sections">Ordered sequence of sections to look at</param>
/// <param name="val">Default value</param>
/// <returns></returns>
public static T GetConfigVarFromSections<T>(IConfigSource config, string varname, string[] sections, object val)
{
foreach (string section in sections)
{
IConfig cnf = config.Configs[section];
if (cnf == null)
continue;
if (typeof(T) == typeof(String))
val = cnf.GetString(varname, (string)val);
else if (typeof(T) == typeof(Boolean))
val = cnf.GetBoolean(varname, (bool)val);
else if (typeof(T) == typeof(Int32))
val = cnf.GetInt(varname, (int)val);
else if (typeof(T) == typeof(float))
val = cnf.GetFloat(varname, (float)val);
else
m_log.ErrorFormat("[UTIL]: Unhandled type {0}", typeof(T));
}
return (T)val;
}
public static void MergeEnvironmentToConfig(IConfigSource ConfigSource)
{
IConfig enVars = ConfigSource.Configs["Environment"];
// if section does not exist then user isn't expecting them, so don't bother.
if( enVars != null )
{
// load the values from the environment
EnvConfigSource envConfigSource = new EnvConfigSource();
// add the requested keys
string[] env_keys = enVars.GetKeys();
foreach ( string key in env_keys )
{
envConfigSource.AddEnv(key, string.Empty);
}
// load the values from environment
envConfigSource.LoadEnv();
// add them in to the master
ConfigSource.Merge(envConfigSource);
ConfigSource.ExpandKeyValues();
}
}
public static T ReadSettingsFromIniFile<T>(IConfig config, T settingsClass)
{
Type settingsType = settingsClass.GetType();
FieldInfo[] fieldInfos = settingsType.GetFields();
foreach (FieldInfo fieldInfo in fieldInfos)
{
if (!fieldInfo.IsStatic)
{
if (fieldInfo.FieldType == typeof(System.String))
{
fieldInfo.SetValue(settingsClass, config.Get(fieldInfo.Name, (string)fieldInfo.GetValue(settingsClass)));
}
else if (fieldInfo.FieldType == typeof(System.Boolean))
{
fieldInfo.SetValue(settingsClass, config.GetBoolean(fieldInfo.Name, (bool)fieldInfo.GetValue(settingsClass)));
}
else if (fieldInfo.FieldType == typeof(System.Int32))
{
fieldInfo.SetValue(settingsClass, config.GetInt(fieldInfo.Name, (int)fieldInfo.GetValue(settingsClass)));
}
else if (fieldInfo.FieldType == typeof(System.Single))
{
fieldInfo.SetValue(settingsClass, config.GetFloat(fieldInfo.Name, (float)fieldInfo.GetValue(settingsClass)));
}
else if (fieldInfo.FieldType == typeof(System.UInt32))
{
fieldInfo.SetValue(settingsClass, Convert.ToUInt32(config.Get(fieldInfo.Name, ((uint)fieldInfo.GetValue(settingsClass)).ToString())));
}
}
}
PropertyInfo[] propertyInfos = settingsType.GetProperties();
foreach (PropertyInfo propInfo in propertyInfos)
{
if ((propInfo.CanRead) && (propInfo.CanWrite))
{
if (propInfo.PropertyType == typeof(System.String))
{
propInfo.SetValue(settingsClass, config.Get(propInfo.Name, (string)propInfo.GetValue(settingsClass, null)), null);
}
else if (propInfo.PropertyType == typeof(System.Boolean))
{
propInfo.SetValue(settingsClass, config.GetBoolean(propInfo.Name, (bool)propInfo.GetValue(settingsClass, null)), null);
}
else if (propInfo.PropertyType == typeof(System.Int32))
{
propInfo.SetValue(settingsClass, config.GetInt(propInfo.Name, (int)propInfo.GetValue(settingsClass, null)), null);
}
else if (propInfo.PropertyType == typeof(System.Single))
{
propInfo.SetValue(settingsClass, config.GetFloat(propInfo.Name, (float)propInfo.GetValue(settingsClass, null)), null);
}
if (propInfo.PropertyType == typeof(System.UInt32))
{
propInfo.SetValue(settingsClass, Convert.ToUInt32(config.Get(propInfo.Name, ((uint)propInfo.GetValue(settingsClass, null)).ToString())), null);
}
}
}
return settingsClass;
}
/// <summary>
/// Reads a configuration file, configFile, merging it with the main configuration, config.
/// If the file doesn't exist, it copies a given exampleConfigFile onto configFile, and then
/// merges it.
/// </summary>
/// <param name="config">The main configuration data</param>
/// <param name="configFileName">The name of a configuration file in ConfigDirectory variable, no path</param>
/// <param name="exampleConfigFile">Full path to an example configuration file</param>
/// <param name="configFilePath">Full path ConfigDirectory/configFileName</param>
/// <param name="created">True if the file was created in ConfigDirectory, false if it existed</param>
/// <returns>True if success</returns>
public static bool MergeConfigurationFile(IConfigSource config, string configFileName, string exampleConfigFile, out string configFilePath, out bool created)
{
created = false;
configFilePath = string.Empty;
IConfig cnf = config.Configs["Startup"];
if (cnf == null)
{
m_log.WarnFormat("[UTILS]: Startup section doesn't exist");
return false;
}
string configDirectory = cnf.GetString("ConfigDirectory", ".");
string configFile = Path.Combine(configDirectory, configFileName);
if (!File.Exists(configFile) && !string.IsNullOrEmpty(exampleConfigFile))
{
// We need to copy the example onto it
if (!Directory.Exists(configDirectory))
Directory.CreateDirectory(configDirectory);
try
{
File.Copy(exampleConfigFile, configFile);
created = true;
}
catch (Exception e)
{
m_log.WarnFormat("[UTILS]: Exception copying configuration file {0} to {1}: {2}", configFile, exampleConfigFile, e.Message);
return false;
}
}
if (File.Exists(configFile))
{
// Merge
config.Merge(new IniConfigSource(configFile));
config.ExpandKeyValues();
configFilePath = configFile;
return true;
}
else
return false;
}
#endregion
public static float Clip(float x, float min, float max)
{
return Math.Min(Math.Max(x, min), max);
}
public static int Clip(int x, int min, int max)
{
return Math.Min(Math.Max(x, min), max);
}
public static Vector3 Clip(Vector3 vec, float min, float max)
{
return new Vector3(Clip(vec.X, min, max), Clip(vec.Y, min, max),
Clip(vec.Z, min, max));
}
/// <summary>
/// Convert an UUID to a raw uuid string. Right now this is a string without hyphens.
/// </summary>
/// <param name="UUID"></param>
/// <returns></returns>
public static String ToRawUuidString(UUID UUID)
{
return UUID.Guid.ToString("n");
}
public static string CleanString(string input)
{
if (input.Length == 0)
return input;
int clip = input.Length;
// Test for ++ string terminator
int pos = input.IndexOf("\0");
if (pos != -1 && pos < clip)
clip = pos;
// Test for CR
pos = input.IndexOf("\r");
if (pos != -1 && pos < clip)
clip = pos;
// Test for LF
pos = input.IndexOf("\n");
if (pos != -1 && pos < clip)
clip = pos;
// Truncate string before first end-of-line character found
return input.Substring(0, clip);
}
/// <summary>
/// returns the contents of /etc/issue on Unix Systems
/// Use this for where it's absolutely necessary to implement platform specific stuff
/// </summary>
/// <returns></returns>
public static string ReadEtcIssue()
{
try
{
StreamReader sr = new StreamReader("/etc/issue.net");
string issue = sr.ReadToEnd();
sr.Close();
return issue;
}
catch (Exception)
{
return "";
}
}
public static void SerializeToFile(string filename, Object obj)
{
IFormatter formatter = new BinaryFormatter();
Stream stream = null;
try
{
stream = new FileStream(
filename, FileMode.Create,
FileAccess.Write, FileShare.None);
formatter.Serialize(stream, obj);
}
catch (Exception e)
{
m_log.Error(e.ToString());
}
finally
{
if (stream != null)
{
stream.Close();
}
}
}
public static Object DeserializeFromFile(string filename)
{
IFormatter formatter = new BinaryFormatter();
Stream stream = null;
Object ret = null;
try
{
stream = new FileStream(
filename, FileMode.Open,
FileAccess.Read, FileShare.None);
ret = formatter.Deserialize(stream);
}
catch (Exception e)
{
m_log.Error(e.ToString());
}
finally
{
if (stream != null)
{
stream.Close();
}
}
return ret;
}
public static string Compress(string text)
{
byte[] buffer = Util.UTF8.GetBytes(text);
MemoryStream memory = new MemoryStream();
using (GZipStream compressor = new GZipStream(memory, CompressionMode.Compress, true))
{
compressor.Write(buffer, 0, buffer.Length);
}
memory.Position = 0;
byte[] compressed = new byte[memory.Length];
memory.Read(compressed, 0, compressed.Length);
byte[] compressedBuffer = new byte[compressed.Length + 4];
Buffer.BlockCopy(compressed, 0, compressedBuffer, 4, compressed.Length);
Buffer.BlockCopy(BitConverter.GetBytes(buffer.Length), 0, compressedBuffer, 0, 4);
return Convert.ToBase64String(compressedBuffer);
}
public static string Decompress(string compressedText)
{
byte[] compressedBuffer = Convert.FromBase64String(compressedText);
using (MemoryStream memory = new MemoryStream())
{
int msgLength = BitConverter.ToInt32(compressedBuffer, 0);
memory.Write(compressedBuffer, 4, compressedBuffer.Length - 4);
byte[] buffer = new byte[msgLength];
memory.Position = 0;
using (GZipStream decompressor = new GZipStream(memory, CompressionMode.Decompress))
{
decompressor.Read(buffer, 0, buffer.Length);
}
return Util.UTF8.GetString(buffer);
}
}
/// <summary>
/// Copy data from one stream to another, leaving the read position of both streams at the beginning.
/// </summary>
/// <param name='inputStream'>
/// Input stream. Must be seekable.
/// </param>
/// <exception cref='ArgumentException'>
/// Thrown if the input stream is not seekable.
/// </exception>
public static Stream Copy(Stream inputStream)
{
if (!inputStream.CanSeek)
throw new ArgumentException("Util.Copy(Stream inputStream) must receive an inputStream that can seek");
const int readSize = 256;
byte[] buffer = new byte[readSize];
MemoryStream ms = new MemoryStream();
int count = inputStream.Read(buffer, 0, readSize);
while (count > 0)
{
ms.Write(buffer, 0, count);
count = inputStream.Read(buffer, 0, readSize);
}
ms.Position = 0;
inputStream.Position = 0;
return ms;
}
public static XmlRpcResponse XmlRpcCommand(string url, string methodName, params object[] args)
{
return SendXmlRpcCommand(url, methodName, args);
}
public static XmlRpcResponse SendXmlRpcCommand(string url, string methodName, object[] args)
{
XmlRpcRequest client = new XmlRpcRequest(methodName, args);
return client.Send(url, 6000);
}
/// <summary>
/// Returns an error message that the user could not be found in the database
/// </summary>
/// <returns>XML string consisting of a error element containing individual error(s)</returns>
public static XmlRpcResponse CreateUnknownUserErrorResponse()
{
XmlRpcResponse response = new XmlRpcResponse();
Hashtable responseData = new Hashtable();
responseData["error_type"] = "unknown_user";
responseData["error_desc"] = "The user requested is not in the database";
response.Value = responseData;
return response;
}
/// <summary>
/// Converts a byte array in big endian order into an ulong.
/// </summary>
/// <param name="bytes">
/// The array of bytes
/// </param>
/// <returns>
/// The extracted ulong
/// </returns>
public static ulong BytesToUInt64Big(byte[] bytes)
{
if (bytes.Length < 8) return 0;
return ((ulong)bytes[0] << 56) | ((ulong)bytes[1] << 48) | ((ulong)bytes[2] << 40) | ((ulong)bytes[3] << 32) |
((ulong)bytes[4] << 24) | ((ulong)bytes[5] << 16) | ((ulong)bytes[6] << 8) | (ulong)bytes[7];
}
// used for RemoteParcelRequest (for "About Landmark")
public static UUID BuildFakeParcelID(ulong regionHandle, uint x, uint y)
{
byte[] bytes =
{
(byte)regionHandle, (byte)(regionHandle >> 8), (byte)(regionHandle >> 16), (byte)(regionHandle >> 24),
(byte)(regionHandle >> 32), (byte)(regionHandle >> 40), (byte)(regionHandle >> 48), (byte)(regionHandle >> 56),
(byte)x, (byte)(x >> 8), 0, 0,
(byte)y, (byte)(y >> 8), 0, 0 };
return new UUID(bytes, 0);
}
public static UUID BuildFakeParcelID(ulong regionHandle, uint x, uint y, uint z)
{
byte[] bytes =
{
(byte)regionHandle, (byte)(regionHandle >> 8), (byte)(regionHandle >> 16), (byte)(regionHandle >> 24),
(byte)(regionHandle >> 32), (byte)(regionHandle >> 40), (byte)(regionHandle >> 48), (byte)(regionHandle >> 56),
(byte)x, (byte)(x >> 8), (byte)z, (byte)(z >> 8),
(byte)y, (byte)(y >> 8), 0, 0 };
return new UUID(bytes, 0);
}
public static bool ParseFakeParcelID(UUID parcelID, out ulong regionHandle, out uint x, out uint y)
{
byte[] bytes = parcelID.GetBytes();
regionHandle = Utils.BytesToUInt64(bytes);
x = Utils.BytesToUInt(bytes, 8) & 0xffff;
y = Utils.BytesToUInt(bytes, 12) & 0xffff;
// validation may fail, just reducing the odds of using a real UUID as encoded parcel
return ( bytes[0] == 0 && bytes[4] == 0 && // handler x,y multiples of 256
bytes[9] < 64 && bytes[13] < 64 && // positions < 16km
bytes[14] == 0 && bytes[15] == 0);
}
public static void ParseFakeParcelID(UUID parcelID, out ulong regionHandle, out uint x, out uint y, out uint z)
{
byte[] bytes = parcelID.GetBytes();
regionHandle = Utils.BytesToUInt64(bytes);
x = Utils.BytesToUInt(bytes, 8) & 0xffff;
z = (Utils.BytesToUInt(bytes, 8) & 0xffff0000) >> 16;
y = Utils.BytesToUInt(bytes, 12) & 0xffff;
}
public static void FakeParcelIDToGlobalPosition(UUID parcelID, out uint x, out uint y)
{
ulong regionHandle;
uint rx, ry;
ParseFakeParcelID(parcelID, out regionHandle, out x, out y);
Utils.LongToUInts(regionHandle, out rx, out ry);
x += rx;
y += ry;
}
/// <summary>
/// Get operating system information if available. Returns only the first 45 characters of information
/// </summary>
/// <returns>
/// Operating system information. Returns an empty string if none was available.
/// </returns>
public static string GetOperatingSystemInformation()
{
string os = String.Empty;
// if (Environment.OSVersion.Platform != PlatformID.Unix)
// {
// os = Environment.OSVersion.ToString();
// }
// else
// {
// os = ReadEtcIssue();
// }
//
// if (os.Length > 45)
// {
// os = os.Substring(0, 45);
// }
return os;
}
public static string GetRuntimeInformation()
{
string ru = String.Empty;
if (Environment.OSVersion.Platform == PlatformID.Unix)
{
ru = "Unix/Mono";
}
else
if (Environment.OSVersion.Platform == PlatformID.MacOSX)
ru = "OSX/Mono";
else
{
if (IsPlatformMono)
ru = "Win/Mono";
else
ru = "Win/.NET";
}
return ru;
}
/// <summary>
/// Is the given string a UUID?
/// </summary>
/// <param name="s"></param>
/// <returns></returns>
public static bool isUUID(string s)
{
return UUIDPattern.IsMatch(s);
}
public static string GetDisplayConnectionString(string connectionString)
{
int passPosition = 0;
int passEndPosition = 0;
string displayConnectionString = null;
// hide the password in the connection string
passPosition = connectionString.IndexOf("password", StringComparison.OrdinalIgnoreCase);
if (passPosition == -1)
return connectionString;
passPosition = connectionString.IndexOf("=", passPosition);
if (passPosition < connectionString.Length)
passPosition += 1;
passEndPosition = connectionString.IndexOf(";", passPosition);
displayConnectionString = connectionString.Substring(0, passPosition);
displayConnectionString += "***";
displayConnectionString += connectionString.Substring(passEndPosition, connectionString.Length - passEndPosition);
return displayConnectionString;
}
public static string Base64ToString(string str)
{
Decoder utf8Decode = Encoding.UTF8.GetDecoder();
byte[] todecode_byte = Convert.FromBase64String(str);
int charCount = utf8Decode.GetCharCount(todecode_byte, 0, todecode_byte.Length);
char[] decoded_char = new char[charCount];
utf8Decode.GetChars(todecode_byte, 0, todecode_byte.Length, decoded_char, 0);
string result = new String(decoded_char);
return result;
}
public static void BinaryToASCII(char[] chars)
{
for (int i = 0; i < chars.Length; i++)
{
char ch = chars[i];
if (ch < 32 || ch > 127)
chars[i] = '.';
}
}
public static string BinaryToASCII(string src)
{
char[] chars = src.ToCharArray();
BinaryToASCII(chars);
return new String(chars);
}
/// <summary>
/// Reads a known number of bytes from a stream.
/// Throws EndOfStreamException if the stream doesn't contain enough data.
/// </summary>
/// <param name="stream">The stream to read data from</param>
/// <param name="data">The array to write bytes into. The array
/// will be completely filled from the stream, so an appropriate
/// size must be given.</param>
public static void ReadStream(Stream stream, byte[] data)
{
int offset = 0;
int remaining = data.Length;
while (remaining > 0)
{
int read = stream.Read(data, offset, remaining);
if (read <= 0)
throw new EndOfStreamException(String.Format("End of stream reached with {0} bytes left to read", remaining));
remaining -= read;
offset += read;
}
}
public static Guid GetHashGuid(string data, string salt)
{
byte[] hash = ComputeMD5Hash(data + salt, Encoding.Default);
//string s = BitConverter.ToString(hash);
Guid guid = new Guid(hash);
return guid;
}
public static byte ConvertMaturityToAccessLevel(uint maturity)
{
byte retVal = 0;
switch (maturity)
{
case 0: //PG
retVal = 13;
break;
case 1: //Mature
retVal = 21;
break;
case 2: // Adult
retVal = 42;
break;
}
return retVal;
}
public static uint ConvertAccessLevelToMaturity(byte maturity)
{
if (maturity <= 13)
return 0;
else if (maturity <= 21)
return 1;
else
return 2;
}
/// <summary>
/// Produces an OSDMap from its string representation on a stream
/// </summary>
/// <param name="data">The stream</param>
/// <param name="length">The size of the data on the stream</param>
/// <returns>The OSDMap or an exception</returns>
public static OSDMap GetOSDMap(Stream stream, int length)
{
byte[] data = new byte[length];
stream.Read(data, 0, length);
string strdata = Util.UTF8.GetString(data);
OSDMap args = null;
OSD buffer;
buffer = OSDParser.DeserializeJson(strdata);
if (buffer.Type == OSDType.Map)
{
args = (OSDMap)buffer;
return args;
}
return null;
}
public static OSDMap GetOSDMap(string data)
{
OSDMap args = null;
try
{
OSD buffer;
// We should pay attention to the content-type, but let's assume we know it's Json
buffer = OSDParser.DeserializeJson(data);
if (buffer.Type == OSDType.Map)
{
args = (OSDMap)buffer;
return args;
}
else
{
// uh?
m_log.Debug(("[UTILS]: Got OSD of unexpected type " + buffer.Type.ToString()));
return null;
}
}
catch (Exception ex)
{
m_log.Debug("[UTILS]: exception on GetOSDMap " + ex.Message);
return null;
}
}
public static string[] Glob(string path)
{
string vol=String.Empty;
if (Path.VolumeSeparatorChar != Path.DirectorySeparatorChar)
{
string[] vcomps = path.Split(new char[] {Path.VolumeSeparatorChar}, 2, StringSplitOptions.RemoveEmptyEntries);
if (vcomps.Length > 1)
{
path = vcomps[1];
vol = vcomps[0];
}
}
string[] comps = path.Split(new char[] {Path.DirectorySeparatorChar, Path.AltDirectorySeparatorChar}, StringSplitOptions.RemoveEmptyEntries);
// Glob
path = vol;
if (vol != String.Empty)
path += new String(new char[] {Path.VolumeSeparatorChar, Path.DirectorySeparatorChar});
else
path = new String(new char[] {Path.DirectorySeparatorChar});
List<string> paths = new List<string>();
List<string> found = new List<string>();
paths.Add(path);
int compIndex = -1;
foreach (string c in comps)
{
compIndex++;
List<string> addpaths = new List<string>();
foreach (string p in paths)
{
string[] dirs = Directory.GetDirectories(p, c);
if (dirs.Length != 0)
{
foreach (string dir in dirs)
addpaths.Add(Path.Combine(path, dir));
}
// Only add files if that is the last path component
if (compIndex == comps.Length - 1)
{
string[] files = Directory.GetFiles(p, c);
foreach (string f in files)
found.Add(f);
}
}
paths = addpaths;
}
return found.ToArray();
}
public static string ServerURI(string uri)
{
if (uri == string.Empty)
return string.Empty;
// Get rid of eventual slashes at the end
uri = uri.TrimEnd('/');
IPAddress ipaddr1 = null;
string port1 = "";
try
{
ipaddr1 = Util.GetHostFromURL(uri);
}
catch { }
try
{
port1 = uri.Split(new char[] { ':' })[2];
}
catch { }
// We tried our best to convert the domain names to IP addresses
return (ipaddr1 != null) ? "http://" + ipaddr1.ToString() + ":" + port1 : uri;
}
/// <summary>
/// Convert a string to a byte format suitable for transport in an LLUDP packet. The output is truncated to 256 bytes if necessary.
/// </summary>
/// <param name="str">
/// If null or empty, then an bytes[0] is returned.
/// Using "\0" will return a conversion of the null character to a byte. This is not the same as bytes[0]
/// </param>
/// <param name="args">
/// Arguments to substitute into the string via the {} mechanism.
/// </param>
/// <returns></returns>
public static byte[] StringToBytes256(string str, params object[] args)
{
return StringToBytes256(string.Format(str, args));
}
/// <summary>
/// Convert a string to a byte format suitable for transport in an LLUDP packet. The output is truncated to 256 bytes if necessary.
/// </summary>
/// <param name="str">
/// If null or empty, then an bytes[0] is returned.
/// Using "\0" will return a conversion of the null character to a byte. This is not the same as bytes[0]
/// </param>
/// <returns></returns>
public static byte[] StringToBytes256(string str)
{
if (String.IsNullOrEmpty(str))
return Utils.EmptyBytes;
if (!str.EndsWith("\0"))
str += "\0";
// Because this is UTF-8 encoding and not ASCII, it's possible we
// might have gotten an oversized array even after the string trim
byte[] data = UTF8.GetBytes(str);
if (data.Length > 255) //play safe
{
int cut = 254;
if((data[cut] & 0x80 ) != 0 )
{
while(cut > 0 && (data[cut] & 0xc0) != 0xc0)
cut--;
}
Array.Resize<byte>(ref data, cut + 1);
data[cut] = 0;
}
return data;
}
/// <summary>
/// Convert a string to a byte format suitable for transport in an LLUDP packet. The output is truncated to 1024 bytes if necessary.
/// </summary>
/// <param name="str">
/// If null or empty, then an bytes[0] is returned.
/// Using "\0" will return a conversion of the null character to a byte. This is not the same as bytes[0]
/// </param>
/// <param name="args">
/// Arguments to substitute into the string via the {} mechanism.
/// </param>
/// <returns></returns>
public static byte[] StringToBytes1024(string str, params object[] args)
{
return StringToBytes1024(string.Format(str, args));
}
/// <summary>
/// Convert a string to a byte format suitable for transport in an LLUDP packet. The output is truncated to 1024 bytes if necessary.
/// </summary>
/// <param name="str">
/// If null or empty, then an bytes[0] is returned.
/// Using "\0" will return a conversion of the null character to a byte. This is not the same as bytes[0]
/// </param>
/// <returns></returns>
public static byte[] StringToBytes1024(string str)
{
if (String.IsNullOrEmpty(str))
return Utils.EmptyBytes;
if (!str.EndsWith("\0"))
str += "\0";
// Because this is UTF-8 encoding and not ASCII, it's possible we
// might have gotten an oversized array even after the string trim
byte[] data = UTF8.GetBytes(str);
if (data.Length > 1024)
{
int cut = 1023;
if((data[cut] & 0x80 ) != 0 )
{
while(cut > 0 && (data[cut] & 0xc0) != 0xc0)
cut--;
}
Array.Resize<byte>(ref data, cut + 1);
data[cut] = 0;
}
return data;
}
/// <summary>
/// Convert a string to a byte format suitable for transport in an LLUDP packet. The output is truncated to MaxLength bytes if necessary.
/// </summary>
/// <param name="str">
/// If null or empty, then an bytes[0] is returned.
/// Using "\0" will return a conversion of the null character to a byte. This is not the same as bytes[0]
/// </param>
/// <param name="args">
/// Arguments to substitute into the string via the {} mechanism.
/// </param>
/// <returns></returns>
public static byte[] StringToBytes(string str, int MaxLength, params object[] args)
{
return StringToBytes1024(string.Format(str, args), MaxLength);
}
/// <summary>
/// Convert a string to a byte format suitable for transport in an LLUDP packet. The output is truncated to MaxLength bytes if necessary.
/// </summary>
/// <param name="str">
/// If null or empty, then an bytes[0] is returned.
/// Using "\0" will return a conversion of the null character to a byte. This is not the same as bytes[0]
/// </param>
/// <returns></returns>
public static byte[] StringToBytes(string str, int MaxLength)
{
if (String.IsNullOrEmpty(str))
return Utils.EmptyBytes;
if (!str.EndsWith("\0"))
str += "\0";
// Because this is UTF-8 encoding and not ASCII, it's possible we
// might have gotten an oversized array even after the string trim
byte[] data = UTF8.GetBytes(str);
if (data.Length > MaxLength)
{
int cut = MaxLength - 1 ;
if((data[cut] & 0x80 ) != 0 )
{
while(cut > 0 && (data[cut] & 0xc0) != 0xc0)
cut--;
}
Array.Resize<byte>(ref data, cut + 1);
data[cut] = 0;
}
return data;
}
/// <summary>
/// Pretty format the hashtable contents to a single line.
/// </summary>
/// <remarks>
/// Used for debugging output.
/// </remarks>
/// <param name='ht'></param>
public static string PrettyFormatToSingleLine(Hashtable ht)
{
StringBuilder sb = new StringBuilder();
int i = 0;
foreach (string key in ht.Keys)
{
sb.AppendFormat("{0}:{1}", key, ht[key]);
if (++i < ht.Count)
sb.AppendFormat(", ");
}
return sb.ToString();
}
public static bool TryParseHttpRange(string header, out int start, out int end)
{
start = end = 0;
if (header.StartsWith("bytes="))
{
string[] rangeValues = header.Substring(6).Split('-');
if (rangeValues.Length == 2)
{
string rawStart = rangeValues[0].Trim();
if (rawStart != "" && !Int32.TryParse(rawStart, out start))
return false;
if (start < 0)
return false;
string rawEnd = rangeValues[1].Trim();
if (rawEnd == "")
{
end = -1;
return true;
}
else if (Int32.TryParse(rawEnd, out end))
return end > 0;
}
}
start = end = 0;
return false;
}
/// <summary>
/// Used to trigger an early library load on Windows systems.
/// </summary>
/// <remarks>
/// Required to get 32-bit and 64-bit processes to automatically use the
/// appropriate native library.
/// </remarks>
/// <param name="dllToLoad"></param>
/// <returns></returns>
[DllImport("kernel32.dll")]
public static extern IntPtr LoadLibrary(string dllToLoad);
/// <summary>
/// Determine whether the current process is 64 bit
/// </summary>
/// <returns>true if so, false if not</returns>
public static bool Is64BitProcess()
{
return IntPtr.Size == 8;
}
#region FireAndForget Threading Pattern
public static void InitThreadPool(int minThreads, int maxThreads)
{
if (maxThreads < 2)
throw new ArgumentOutOfRangeException("maxThreads", "maxThreads must be greater than 2");
if (minThreads > maxThreads || minThreads < 2)
throw new ArgumentOutOfRangeException("minThreads", "minThreads must be greater than 2 and less than or equal to maxThreads");
if (m_ThreadPool != null)
{
m_log.Warn("SmartThreadPool is already initialized. Ignoring request.");
return;
}
STPStartInfo startInfo = new STPStartInfo();
startInfo.ThreadPoolName = "Util";
startInfo.IdleTimeout = 20000;
startInfo.MaxWorkerThreads = maxThreads;
startInfo.MinWorkerThreads = minThreads;
m_ThreadPool = new SmartThreadPool(startInfo);
m_threadPoolWatchdog = new Timer(ThreadPoolWatchdog, null, 0, 1000);
}
public static int FireAndForgetCount()
{
const int MAX_SYSTEM_THREADS = 200;
switch (FireAndForgetMethod)
{
case FireAndForgetMethod.QueueUserWorkItem:
int workerThreads, iocpThreads;
ThreadPool.GetAvailableThreads(out workerThreads, out iocpThreads);
return workerThreads;
case FireAndForgetMethod.SmartThreadPool:
return m_ThreadPool.MaxThreads - m_ThreadPool.InUseThreads;
case FireAndForgetMethod.Thread:
return MAX_SYSTEM_THREADS - System.Diagnostics.Process.GetCurrentProcess().Threads.Count;
default:
throw new NotImplementedException();
}
}
/// <summary>
/// Additional information about threads in the main thread pool. Used to time how long the
/// thread has been running, and abort it if it has timed-out.
/// </summary>
private class ThreadInfo
{
public long ThreadFuncNum { get; set; }
public string StackTrace { get; set; }
private string context;
public bool LogThread { get; set; }
public IWorkItemResult WorkItem { get; set; }
public Thread Thread { get; set; }
public bool Running { get; set; }
public bool Aborted { get; set; }
private int started;
public bool DoTimeout;
public ThreadInfo(long threadFuncNum, string context, bool dotimeout = true)
{
ThreadFuncNum = threadFuncNum;
this.context = context;
LogThread = false;
Thread = null;
Running = false;
Aborted = false;
DoTimeout = dotimeout;
}
public void Started()
{
Thread = Thread.CurrentThread;
started = EnvironmentTickCount();
Running = true;
}
public void Ended()
{
Running = false;
}
public int Elapsed()
{
return EnvironmentTickCountSubtract(started);
}
public void Abort()
{
Aborted = true;
WorkItem.Cancel(true);
}
/// <summary>
/// Returns the thread's stack trace.
/// </summary>
/// <remarks>
/// May return one of two stack traces. First, tries to get the thread's active stack
/// trace. But this can fail, so as a fallback this method will return the stack
/// trace that was active when the task was queued.
/// </remarks>
public string GetStackTrace()
{
string ret = (context == null) ? "" : ("(" + context + ") ");
StackTrace activeStackTrace = Util.GetStackTrace(Thread);
if (activeStackTrace != null)
ret += activeStackTrace.ToString();
else if (StackTrace != null)
ret += "(Stack trace when queued) " + StackTrace;
// else, no stack trace available
return ret;
}
}
private static long nextThreadFuncNum = 0;
private static long numQueuedThreadFuncs = 0;
private static long numRunningThreadFuncs = 0;
private static long numTotalThreadFuncsCalled = 0;
private static Int32 threadFuncOverloadMode = 0;
public static long TotalQueuedFireAndForgetCalls { get { return numQueuedThreadFuncs; } }
public static long TotalRunningFireAndForgetCalls { get { return numRunningThreadFuncs; } }
// Maps (ThreadFunc number -> Thread)
private static ConcurrentDictionary<long, ThreadInfo> activeThreads = new ConcurrentDictionary<long, ThreadInfo>();
private static readonly int THREAD_TIMEOUT = 10 * 60 * 1000; // 10 minutes
/// <summary>
/// Finds threads in the main thread pool that have timed-out, and aborts them.
/// </summary>
private static void ThreadPoolWatchdog(object state)
{
foreach (KeyValuePair<long, ThreadInfo> entry in activeThreads)
{
ThreadInfo t = entry.Value;
if (t.DoTimeout && t.Running && !t.Aborted && (t.Elapsed() >= THREAD_TIMEOUT))
{
m_log.WarnFormat("Timeout in threadfunc {0} ({1}) {2}", t.ThreadFuncNum, t.Thread.Name, t.GetStackTrace());
t.Abort();
ThreadInfo dummy;
activeThreads.TryRemove(entry.Key, out dummy);
// It's possible that the thread won't abort. To make sure the thread pool isn't
// depleted, increase the pool size.
// m_ThreadPool.MaxThreads++;
}
}
}
public static long TotalFireAndForgetCallsMade { get { return numTotalThreadFuncsCalled; } }
public static Dictionary<string, int> GetFireAndForgetCallsMade()
{
return new Dictionary<string, int>(m_fireAndForgetCallsMade);
}
private static Dictionary<string, int> m_fireAndForgetCallsMade = new Dictionary<string, int>();
public static Dictionary<string, int> GetFireAndForgetCallsInProgress()
{
return new Dictionary<string, int>(m_fireAndForgetCallsInProgress);
}
private static Dictionary<string, int> m_fireAndForgetCallsInProgress = new Dictionary<string, int>();
public static void FireAndForget(System.Threading.WaitCallback callback)
{
FireAndForget(callback, null, null);
}
public static void FireAndForget(System.Threading.WaitCallback callback, object obj)
{
FireAndForget(callback, obj, null);
}
public static void FireAndForget(System.Threading.WaitCallback callback, object obj, string context, bool dotimeout = true)
{
Interlocked.Increment(ref numTotalThreadFuncsCalled);
WaitCallback realCallback;
bool loggingEnabled = LogThreadPool > 0;
long threadFuncNum = Interlocked.Increment(ref nextThreadFuncNum);
ThreadInfo threadInfo = new ThreadInfo(threadFuncNum, context, dotimeout);
if (FireAndForgetMethod == FireAndForgetMethod.RegressionTest)
{
// If we're running regression tests, then we want any exceptions to rise up to the test code.
realCallback =
o =>
{
Culture.SetCurrentCulture();
callback(o);
};
}
else
{
// When OpenSim interacts with a database or sends data over the wire, it must send this in en_US culture
// so that we don't encounter problems where, for instance, data is saved with a culture that uses commas
// for decimals places but is read by a culture that treats commas as number seperators.
realCallback = o =>
{
long numQueued1 = Interlocked.Decrement(ref numQueuedThreadFuncs);
long numRunning1 = Interlocked.Increment(ref numRunningThreadFuncs);
threadInfo.Started();
activeThreads[threadFuncNum] = threadInfo;
try
{
if ((loggingEnabled || (threadFuncOverloadMode == 1)) && threadInfo.LogThread)
m_log.DebugFormat("Run threadfunc {0} (Queued {1}, Running {2})", threadFuncNum, numQueued1, numRunning1);
Culture.SetCurrentCulture();
callback(o);
}
catch (ThreadAbortException)
{
}
catch (Exception e)
{
m_log.Error(string.Format("[UTIL]: Util STP threadfunc {0} terminated with error ", threadFuncNum), e);
}
finally
{
Interlocked.Decrement(ref numRunningThreadFuncs);
threadInfo.Ended();
ThreadInfo dummy;
activeThreads.TryRemove(threadFuncNum, out dummy);
if ((loggingEnabled || (threadFuncOverloadMode == 1)) && threadInfo.LogThread)
m_log.DebugFormat("Exit threadfunc {0} ({1})", threadFuncNum, FormatDuration(threadInfo.Elapsed()));
}
};
}
long numQueued = Interlocked.Increment(ref numQueuedThreadFuncs);
try
{
threadInfo.LogThread = false;
switch (FireAndForgetMethod)
{
case FireAndForgetMethod.RegressionTest:
case FireAndForgetMethod.None:
realCallback.Invoke(obj);
break;
case FireAndForgetMethod.QueueUserWorkItem:
ThreadPool.QueueUserWorkItem(realCallback, obj);
break;
case FireAndForgetMethod.SmartThreadPool:
if (m_ThreadPool == null)
InitThreadPool(2, 15);
threadInfo.WorkItem = m_ThreadPool.QueueWorkItem((cb, o) => cb(o), realCallback, obj);
break;
case FireAndForgetMethod.Thread:
Thread thread = new Thread(delegate(object o) { realCallback(o); });
thread.Start(obj);
break;
default:
throw new NotImplementedException();
}
}
catch (Exception)
{
Interlocked.Decrement(ref numQueuedThreadFuncs);
ThreadInfo dummy;
activeThreads.TryRemove(threadFuncNum, out dummy);
throw;
}
}
/// <summary>
/// Returns whether the thread should be logged. Some very common threads aren't logged,
/// to avoid filling up the log.
/// </summary>
/// <param name="stackTrace">A partial stack trace of where the thread was queued</param>
/// <returns>Whether to log this thread</returns>
private static bool ShouldLogThread(string stackTrace)
{
if (LogThreadPool < 3)
{
if (stackTrace.Contains("BeginFireQueueEmpty"))
return false;
}
return true;
}
/// <summary>
/// Returns a stack trace for a thread added using FireAndForget().
/// </summary>
/// <param name="full">Will contain the full stack trace</param>
/// <param name="partial">Will contain only the first frame of the stack trace</param>
private static void GetFireAndForgetStackTrace(out string full, out string partial)
{
string src = Environment.StackTrace;
string[] lines = src.Split(new string[] { Environment.NewLine }, StringSplitOptions.None);
StringBuilder dest = new StringBuilder(src.Length);
bool started = false;
bool first = true;
partial = "";
for (int i = 0; i < lines.Length; i++)
{
string line = lines[i];
if (!started)
{
// Skip the initial stack frames, because they're of no interest for debugging
if (line.Contains("StackTrace") || line.Contains("FireAndForget"))
continue;
started = true;
}
if (first)
{
line = line.TrimStart();
first = false;
partial = line;
}
bool last = (i == lines.Length - 1);
if (last)
dest.Append(line);
else
dest.AppendLine(line);
}
full = dest.ToString();
}
#pragma warning disable 0618
/// <summary>
/// Return the stack trace of a different thread.
/// </summary>
/// <remarks>
/// This is complicated because the thread needs to be paused in order to get its stack
/// trace. And pausing another thread can cause a deadlock. This method attempts to
/// avoid deadlock by using a short timeout (200ms), after which it gives up and
/// returns 'null' instead of the stack trace.
///
/// Take from: http://stackoverflow.com/a/14935378
///
/// WARNING: this doesn't work in Mono. See https://bugzilla.novell.com/show_bug.cgi?id=571691
///
/// </remarks>
/// <returns>The stack trace, or null if failed to get it</returns>
private static StackTrace GetStackTrace(Thread targetThread)
{
return null;
/*
not only this does not work on mono but it is not longer recomended on windows.
can cause deadlocks etc.
if (IsPlatformMono)
{
// This doesn't work in Mono
return null;
}
ManualResetEventSlim fallbackThreadReady = new ManualResetEventSlim();
ManualResetEventSlim exitedSafely = new ManualResetEventSlim();
try
{
new Thread(delegate()
{
fallbackThreadReady.Set();
while (!exitedSafely.Wait(200))
{
try
{
targetThread.Resume();
}
catch (Exception)
{
// Whatever happens, do never stop to resume the main-thread regularly until the main-thread has exited safely.
}
}
}).Start();
fallbackThreadReady.Wait();
// From here, you have about 200ms to get the stack-trace
targetThread.Suspend();
StackTrace trace = null;
try
{
trace = new StackTrace(targetThread, true);
}
catch (ThreadStateException)
{
//failed to get stack trace, since the fallback-thread resumed the thread
//possible reasons:
//1.) This thread was just too slow
//2.) A deadlock ocurred
//Automatic retry seems too risky here, so just return null.
}
try
{
targetThread.Resume();
}
catch (ThreadStateException)
{
// Thread is running again already
}
return trace;
}
finally
{
// Signal the fallack-thread to stop
exitedSafely.Set();
}
*/
}
#pragma warning restore 0618
/// <summary>
/// Get information about the current state of the smart thread pool.
/// </summary>
/// <returns>
/// null if this isn't the pool being used for non-scriptengine threads.
/// </returns>
public static STPInfo GetSmartThreadPoolInfo()
{
if (m_ThreadPool == null)
return null;
STPInfo stpi = new STPInfo();
stpi.Name = m_ThreadPool.Name;
stpi.STPStartInfo = m_ThreadPool.STPStartInfo;
stpi.IsIdle = m_ThreadPool.IsIdle;
stpi.IsShuttingDown = m_ThreadPool.IsShuttingdown;
stpi.MaxThreads = m_ThreadPool.MaxThreads;
stpi.MinThreads = m_ThreadPool.MinThreads;
stpi.InUseThreads = m_ThreadPool.InUseThreads;
stpi.ActiveThreads = m_ThreadPool.ActiveThreads;
stpi.WaitingCallbacks = m_ThreadPool.WaitingCallbacks;
stpi.MaxConcurrentWorkItems = m_ThreadPool.Concurrency;
return stpi;
}
public static void StopThreadPool()
{
if (m_ThreadPool == null)
return;
SmartThreadPool pool = m_ThreadPool;
m_ThreadPool = null;
try { pool.Shutdown(); } catch {}
}
#endregion FireAndForget Threading Pattern
/// <summary>
/// Environment.TickCount is an int but it counts all 32 bits so it goes positive
/// and negative every 24.9 days. This trims down TickCount so it doesn't wrap
/// for the callers.
/// This trims it to a 12 day interval so don't let your frame time get too long.
/// </summary>
/// <returns></returns>
public static Int32 EnvironmentTickCount()
{
return Environment.TickCount & EnvironmentTickCountMask;
}
const Int32 EnvironmentTickCountMask = 0x3fffffff;
/// <summary>
/// Environment.TickCount is an int but it counts all 32 bits so it goes positive
/// and negative every 24.9 days. Subtracts the passed value (previously fetched by
/// 'EnvironmentTickCount()') and accounts for any wrapping.
/// </summary>
/// <param name="newValue"></param>
/// <param name="prevValue"></param>
/// <returns>subtraction of passed prevValue from current Environment.TickCount</returns>
public static Int32 EnvironmentTickCountSubtract(Int32 newValue, Int32 prevValue)
{
Int32 diff = newValue - prevValue;
return (diff >= 0) ? diff : (diff + EnvironmentTickCountMask + 1);
}
/// <summary>
/// Environment.TickCount is an int but it counts all 32 bits so it goes positive
/// and negative every 24.9 days. Subtracts the passed value (previously fetched by
/// 'EnvironmentTickCount()') and accounts for any wrapping.
/// </summary>
/// <returns>subtraction of passed prevValue from current Environment.TickCount</returns>
public static Int32 EnvironmentTickCountSubtract(Int32 prevValue)
{
return EnvironmentTickCountSubtract(EnvironmentTickCount(), prevValue);
}
// Returns value of Tick Count A - TickCount B accounting for wrapping of TickCount
// Assumes both tcA and tcB came from previous calls to Util.EnvironmentTickCount().
// A positive return value indicates A occured later than B
public static Int32 EnvironmentTickCountCompare(Int32 tcA, Int32 tcB)
{
// A, B and TC are all between 0 and 0x3fffffff
int tc = EnvironmentTickCount();
if (tc - tcA >= 0)
tcA += EnvironmentTickCountMask + 1;
if (tc - tcB >= 0)
tcB += EnvironmentTickCountMask + 1;
return tcA - tcB;
}
public static long GetPhysicalMemUse()
{
return System.Diagnostics.Process.GetCurrentProcess().WorkingSet64;
}
// returns a timestamp in ms as double
// using the time resolution avaiable to StopWatch
[System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]
public static double GetTimeStamp()
{
return Stopwatch.GetTimestamp() * TimeStampClockPeriod;
}
[System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]
public static double GetTimeStampMS()
{
return Stopwatch.GetTimestamp() * TimeStampClockPeriodMS;
}
// doing math in ticks is usefull to avoid loss of resolution
[System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]
public static long GetTimeStampTicks()
{
return Stopwatch.GetTimestamp();
}
[System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]
public static double TimeStampTicksToMS(long ticks)
{
return ticks * TimeStampClockPeriodMS;
}
/// <summary>
/// Formats a duration (given in milliseconds).
/// </summary>
public static string FormatDuration(int ms)
{
TimeSpan span = new TimeSpan(ms * TimeSpan.TicksPerMillisecond);
string str = "";
string suffix = null;
int hours = (int)span.TotalHours;
if (hours > 0)
{
str += hours.ToString(str.Length == 0 ? "0" : "00");
suffix = "hours";
}
if ((hours > 0) || (span.Minutes > 0))
{
if (str.Length > 0)
str += ":";
str += span.Minutes.ToString(str.Length == 0 ? "0" : "00");
if (suffix == null)
suffix = "min";
}
if ((hours > 0) || (span.Minutes > 0) || (span.Seconds > 0))
{
if (str.Length > 0)
str += ":";
str += span.Seconds.ToString(str.Length == 0 ? "0" : "00");
if (suffix == null)
suffix = "sec";
}
if (suffix == null)
suffix = "ms";
if (span.TotalMinutes < 1)
{
int ms1 = span.Milliseconds;
if (str.Length > 0)
{
ms1 /= 100;
str += ".";
}
str += ms1.ToString("0");
}
str += " " + suffix;
return str;
}
/// <summary>
/// Prints the call stack at any given point. Useful for debugging.
/// </summary>
public static void PrintCallStack()
{
PrintCallStack(m_log.DebugFormat);
}
public delegate void DebugPrinter(string msg, params Object[] parm);
public static void PrintCallStack(DebugPrinter printer)
{
StackTrace stackTrace = new StackTrace(true); // get call stack
StackFrame[] stackFrames = stackTrace.GetFrames(); // get method calls (frames)
// write call stack method names
foreach (StackFrame stackFrame in stackFrames)
{
MethodBase mb = stackFrame.GetMethod();
printer("{0}.{1}:{2}", mb.DeclaringType, mb.Name, stackFrame.GetFileLineNumber()); // write method name
}
}
/// <summary>
/// Gets the client IP address
/// </summary>
/// <param name="xff"></param>
/// <returns></returns>
public static IPEndPoint GetClientIPFromXFF(string xff)
{
if (xff == string.Empty)
return null;
string[] parts = xff.Split(new char[] { ',' });
if (parts.Length > 0)
{
try
{
return new IPEndPoint(IPAddress.Parse(parts[0]), 0);
}
catch (Exception e)
{
m_log.WarnFormat("[UTIL]: Exception parsing XFF header {0}: {1}", xff, e.Message);
}
}
return null;
}
public static string GetCallerIP(Hashtable req)
{
if (req.ContainsKey("headers"))
{
try
{
Hashtable headers = (Hashtable)req["headers"];
if (headers.ContainsKey("remote_addr") && headers["remote_addr"] != null)
return headers["remote_addr"].ToString();
}
catch (Exception e)
{
m_log.WarnFormat("[UTIL]: exception in GetCallerIP: {0}", e.Message);
}
}
return string.Empty;
}
#region Xml Serialization Utilities
public static bool ReadBoolean(XmlReader reader)
{
// AuroraSim uses "int" for some fields that are boolean in OpenSim, e.g. "PassCollisions". Don't fail because of this.
reader.ReadStartElement();
string val = reader.ReadContentAsString().ToLower();
bool result = val.Equals("true") || val.Equals("1");
reader.ReadEndElement();
return result;
}
public static UUID ReadUUID(XmlReader reader, string name)
{
UUID id;
string idStr;
reader.ReadStartElement(name);
if (reader.Name == "Guid")
idStr = reader.ReadElementString("Guid");
else if (reader.Name == "UUID")
idStr = reader.ReadElementString("UUID");
else // no leading tag
idStr = reader.ReadContentAsString();
UUID.TryParse(idStr, out id);
reader.ReadEndElement();
return id;
}
public static Vector3 ReadVector(XmlReader reader, string name)
{
Vector3 vec;
reader.ReadStartElement(name);
vec.X = reader.ReadElementContentAsFloat(reader.Name, String.Empty); // X or x
vec.Y = reader.ReadElementContentAsFloat(reader.Name, String.Empty); // Y or y
vec.Z = reader.ReadElementContentAsFloat(reader.Name, String.Empty); // Z or z
reader.ReadEndElement();
return vec;
}
public static Quaternion ReadQuaternion(XmlReader reader, string name)
{
Quaternion quat = new Quaternion();
reader.ReadStartElement(name);
while (reader.NodeType != XmlNodeType.EndElement)
{
switch (reader.Name.ToLower())
{
case "x":
quat.X = reader.ReadElementContentAsFloat(reader.Name, String.Empty);
break;
case "y":
quat.Y = reader.ReadElementContentAsFloat(reader.Name, String.Empty);
break;
case "z":
quat.Z = reader.ReadElementContentAsFloat(reader.Name, String.Empty);
break;
case "w":
quat.W = reader.ReadElementContentAsFloat(reader.Name, String.Empty);
break;
}
}
reader.ReadEndElement();
return quat;
}
public static T ReadEnum<T>(XmlReader reader, string name)
{
string value = reader.ReadElementContentAsString(name, String.Empty);
// !!!!! to deal with flags without commas
if (value.Contains(" ") && !value.Contains(","))
value = value.Replace(" ", ", ");
return (T)Enum.Parse(typeof(T), value); ;
}
#endregion
#region Universal User Identifiers
/// <summary>
/// Attempts to parse a UUI into its components: UUID, name and URL.
/// </summary>
/// <param name="value">uuid[;endpoint[;first last[;secret]]]</param>
/// <param name="uuid">the uuid part</param>
/// <param name="url">the endpoint part (e.g. http://foo.com)</param>
/// <param name="firstname">the first name part (e.g. Test)</param>
/// <param name="lastname">the last name part (e.g User)</param>
/// <param name="secret">the secret part</param>
public static bool ParseUniversalUserIdentifier(string value, out UUID uuid, out string url, out string firstname, out string lastname, out string secret)
{
uuid = UUID.Zero; url = string.Empty; firstname = "Unknown"; lastname = "UserUPUUI"; secret = string.Empty;
string[] parts = value.Split(';');
if (parts.Length >= 1)
if (!UUID.TryParse(parts[0], out uuid))
return false;
if (parts.Length >= 2)
url = parts[1];
if (parts.Length >= 3)
{
string[] name = parts[2].Split();
if (name.Length == 2)
{
firstname = name[0];
lastname = name[1];
}
}
if (parts.Length >= 4)
secret = parts[3];
return true;
}
/// <summary>
/// For foreign avatars, extracts their original name and Server URL from their First Name and Last Name.
/// </summary>
public static bool ParseForeignAvatarName(string firstname, string lastname,
out string realFirstName, out string realLastName, out string serverURI)
{
realFirstName = realLastName = serverURI = string.Empty;
if (!lastname.Contains("@"))
return false;
if (!firstname.Contains("."))
return false;
realFirstName = firstname.Split('.')[0];
realLastName = firstname.Split('.')[1];
serverURI = new Uri("http://" + lastname.Replace("@", "")).ToString();
return true;
}
/// <summary>
/// Produces a universal (HG) system-facing identifier given the information
/// </summary>
/// <param name="acircuit"></param>
/// <returns>uuid[;homeURI[;first last]]</returns>
public static string ProduceUserUniversalIdentifier(AgentCircuitData acircuit)
{
if (acircuit.ServiceURLs.ContainsKey("HomeURI"))
return UniversalIdentifier(acircuit.AgentID, acircuit.firstname, acircuit.lastname, acircuit.ServiceURLs["HomeURI"].ToString());
else
return acircuit.AgentID.ToString();
}
/// <summary>
/// Produces a universal (HG) system-facing identifier given the information
/// </summary>
/// <param name="id">UUID of the user</param>
/// <param name="firstName">first name (e.g Test)</param>
/// <param name="lastName">last name (e.g. User)</param>
/// <param name="homeURI">homeURI (e.g. http://foo.com)</param>
/// <returns>a string of the form uuid[;homeURI[;first last]]</returns>
public static string UniversalIdentifier(UUID id, String firstName, String lastName, String homeURI)
{
string agentsURI = homeURI;
if (!agentsURI.EndsWith("/"))
agentsURI += "/";
// This is ugly, but there's no other way, given that the name is changed
// in the agent circuit data for foreigners
if (lastName.Contains("@"))
{
string[] parts = firstName.Split(new char[] { '.' });
if (parts.Length == 2)
return CalcUniversalIdentifier(id, agentsURI, parts[0] + " " + parts[1]);
}
return CalcUniversalIdentifier(id, agentsURI, firstName + " " + lastName);
}
private static string CalcUniversalIdentifier(UUID id, string agentsURI, string name)
{
return id.ToString() + ";" + agentsURI + ";" + name;
}
/// <summary>
/// Produces a universal (HG) user-facing name given the information
/// </summary>
/// <param name="firstName"></param>
/// <param name="lastName"></param>
/// <param name="homeURI"></param>
/// <returns>string of the form first.last @foo.com or first last</returns>
public static string UniversalName(String firstName, String lastName, String homeURI)
{
Uri uri = null;
try
{
uri = new Uri(homeURI);
}
catch (UriFormatException)
{
return firstName + " " + lastName;
}
return firstName + "." + lastName + " " + "@" + uri.Authority;
}
#endregion
/// <summary>
/// Escapes the special characters used in "LIKE".
/// </summary>
/// <remarks>
/// For example: EscapeForLike("foo_bar%baz") = "foo\_bar\%baz"
/// </remarks>
public static string EscapeForLike(string str)
{
return str.Replace("_", "\\_").Replace("%", "\\%");
}
/// <summary>
/// Returns the name of the user's viewer.
/// </summary>
/// <remarks>
/// This method handles two ways that viewers specify their name:
/// 1. Viewer = "Firestorm-Release 4.4.2.34167", Channel = "(don't care)" -> "Firestorm-Release 4.4.2.34167"
/// 2. Viewer = "4.5.1.38838", Channel = "Firestorm-Beta" -> "Firestorm-Beta 4.5.1.38838"
/// </remarks>
public static string GetViewerName(AgentCircuitData agent)
{
string name = agent.Viewer;
if (name == null)
name = "";
else
name = name.Trim();
// Check if 'Viewer' is just a version number. If it's *not*, then we
// assume that it contains the real viewer name, and we return it.
foreach (char c in name)
{
if (Char.IsLetter(c))
return name;
}
// The 'Viewer' string contains just a version number. If there's anything in
// 'Channel' then assume that it's the viewer name.
if ((agent.Channel != null) && (agent.Channel.Length > 0))
name = agent.Channel.Trim() + " " + name;
return name;
}
public static void LogFailedXML(string message, string xml)
{
int length = xml.Length;
if (length > 2000)
xml = xml.Substring(0, 2000) + "...";
for (int i = 0 ; i < xml.Length ; i++)
{
if (xml[i] < 0x20)
{
xml = "Unprintable binary data";
break;
}
}
m_log.ErrorFormat("{0} Failed XML ({1} bytes) = {2}", message, length, xml);
}
/// <summary>
/// Performs a high quality image resize
/// </summary>
/// <param name="image">Image to resize</param>
/// <param name="width">New width</param>
/// <param name="height">New height</param>
/// <returns>Resized image</returns>
public static Bitmap ResizeImageSolid(Image image, int width, int height)
{
Bitmap result = new Bitmap(width, height, PixelFormat.Format24bppRgb);
using (ImageAttributes atrib = new ImageAttributes())
using (Graphics graphics = Graphics.FromImage(result))
{
atrib.SetWrapMode(System.Drawing.Drawing2D.WrapMode.TileFlipXY);
atrib.SetWrapMode(System.Drawing.Drawing2D.WrapMode.TileFlipXY);
graphics.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
graphics.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
graphics.PixelOffsetMode = System.Drawing.Drawing2D.PixelOffsetMode.None;
graphics.DrawImage(image,new Rectangle(0,0, result.Width, result.Height),
0, 0, image.Width, image.Height, GraphicsUnit.Pixel, atrib);
}
return result;
}
}
/* don't like this code
public class DoubleQueue<T> where T:class
{
private Queue<T> m_lowQueue = new Queue<T>();
private Queue<T> m_highQueue = new Queue<T>();
private object m_syncRoot = new object();
private Semaphore m_s = new Semaphore(0, 1);
public DoubleQueue()
{
}
public virtual int Count
{
get
{
lock (m_syncRoot)
return m_highQueue.Count + m_lowQueue.Count;
}
}
public virtual void Enqueue(T data)
{
Enqueue(m_lowQueue, data);
}
public virtual void EnqueueLow(T data)
{
Enqueue(m_lowQueue, data);
}
public virtual void EnqueueHigh(T data)
{
Enqueue(m_highQueue, data);
}
private void Enqueue(Queue<T> q, T data)
{
lock (m_syncRoot)
{
q.Enqueue(data);
m_s.WaitOne(0);
m_s.Release();
}
}
public virtual T Dequeue()
{
return Dequeue(Timeout.Infinite);
}
public virtual T Dequeue(int tmo)
{
return Dequeue(TimeSpan.FromMilliseconds(tmo));
}
public virtual T Dequeue(TimeSpan wait)
{
T res = null;
if (!Dequeue(wait, ref res))
return null;
return res;
}
public bool Dequeue(int timeout, ref T res)
{
return Dequeue(TimeSpan.FromMilliseconds(timeout), ref res);
}
public bool Dequeue(TimeSpan wait, ref T res)
{
if (!m_s.WaitOne(wait))
return false;
lock (m_syncRoot)
{
if (m_highQueue.Count > 0)
res = m_highQueue.Dequeue();
else if (m_lowQueue.Count > 0)
res = m_lowQueue.Dequeue();
if (m_highQueue.Count == 0 && m_lowQueue.Count == 0)
return true;
try
{
m_s.Release();
}
catch
{
}
return true;
}
}
public virtual void Clear()
{
lock (m_syncRoot)
{
// Make sure sem count is 0
m_s.WaitOne(0);
m_lowQueue.Clear();
m_highQueue.Clear();
}
}
}
*/
public class BetterRandom
{
private const int BufferSize = 1024; // must be a multiple of 4
private byte[] RandomBuffer;
private int BufferOffset;
private RNGCryptoServiceProvider rng;
public BetterRandom()
{
RandomBuffer = new byte[BufferSize];
rng = new RNGCryptoServiceProvider();
BufferOffset = RandomBuffer.Length;
}
private void FillBuffer()
{
rng.GetBytes(RandomBuffer);
BufferOffset = 0;
}
public int Next()
{
if (BufferOffset >= RandomBuffer.Length)
{
FillBuffer();
}
int val = BitConverter.ToInt32(RandomBuffer, BufferOffset) & 0x7fffffff;
BufferOffset += sizeof(int);
return val;
}
public int Next(int maxValue)
{
return Next() % maxValue;
}
public int Next(int minValue, int maxValue)
{
if (maxValue < minValue)
{
throw new ArgumentOutOfRangeException("maxValue must be greater than or equal to minValue");
}
int range = maxValue - minValue;
return minValue + Next(range);
}
public double NextDouble()
{
int val = Next();
return (double)val / int.MaxValue;
}
public void GetBytes(byte[] buff)
{
rng.GetBytes(buff);
}
}
}
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