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using System;
using System.Collections.Generic;
using System.Text;
using libsecondlife;
using libsecondlife.Packets;
namespace OpenSim.Framework.Utilities
{
public class Util
{
private static Random randomClass = new Random();
private static uint nextXferID = 5000;
private static object XferLock = new object();
public static ulong UIntsToLong(uint X, uint Y)
{
return Helpers.UIntsToLong(X, Y);
}
public static Random RandomClass
{
get
{
return randomClass;
}
}
public static uint GetNextXferID()
{
uint id = 0;
lock(XferLock)
{
id = nextXferID;
nextXferID++;
}
return id;
}
public static int fast_distance2d(int x, int y)
{
x = System.Math.Abs(x);
y = System.Math.Abs(y);
int min = System.Math.Min(x, y);
return (x + y - (min >> 1) - (min >> 2) + (min >> 4));
}
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(": ");
}
if (bytes[bytes.Length - 1] == 0x00)
output.Append(UTF8Encoding.UTF8.GetString(bytes, 0, bytes.Length - 1));
else
output.Append(UTF8Encoding.UTF8.GetString(bytes));
}
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();
}
public Util()
{
}
}
}
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