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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.Generic;
using System.Reflection;
using System.Text;
using log4net;
namespace OpenSim.Framework
{
public static class PermissionsUtil
{
private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
/// <summary>
/// Logs permissions flags. Useful when debugging permission problems.
/// </summary>
/// <param name="message"></param>
public static void LogPermissions(String name, String message, uint basePerm, uint curPerm, uint nextPerm)
{
m_log.DebugFormat("Permissions of \"{0}\" at \"{1}\": Base {2} ({3:X4}), Current {4} ({5:X4}), NextOwner {6} ({7:X4})",
name, message,
PermissionsToString(basePerm), basePerm, PermissionsToString(curPerm), curPerm, PermissionsToString(nextPerm), nextPerm);
}
/// <summary>
/// Converts a permissions bit-mask to a string (e.g., "MCT").
/// </summary>
private static string PermissionsToString(uint perms)
{
string str = "";
if ((perms & (int)PermissionMask.Modify) != 0)
str += "M";
if ((perms & (int)PermissionMask.Copy) != 0)
str += "C";
if ((perms & (int)PermissionMask.Transfer) != 0)
str += "T";
if (str == "")
str = ".";
return str;
}
public static void ApplyFoldedPermissions(uint foldedSourcePerms, ref uint targetPerms)
{
uint folded = foldedSourcePerms & (uint)PermissionMask.FoldedMask;
if(folded == 0 || folded == (uint)PermissionMask.FoldedMask) // invalid we need to ignore, or nothing to do
return;
folded <<= (int)PermissionMask.FoldingShift;
folded |= ~(uint)PermissionMask.UnfoldedMask;
uint tmp = targetPerms;
tmp &= folded;
targetPerms = tmp;
}
// do not touch MOD
public static void ApplyNoModFoldedPermissions(uint foldedSourcePerms, ref uint target)
{
uint folded = foldedSourcePerms & (uint)PermissionMask.FoldedMask;
if(folded == 0 || folded == (uint)PermissionMask.FoldedMask) // invalid we need to ignore, or nothing to do
return;
folded <<= (int)PermissionMask.FoldingShift;
folded |= (~(uint)PermissionMask.UnfoldedMask | (uint)PermissionMask.Modify);
uint tmp = target;
tmp &= folded;
target = tmp;
}
public static uint FixAndFoldPermissions(uint perms)
{
uint tmp = perms;
// C & T rule
if((tmp & (uint)(PermissionMask.Copy | PermissionMask.Transfer)) == 0)
tmp |= (uint)PermissionMask.Transfer;
// unlock
tmp |= (uint)PermissionMask.Move;
tmp &= ~(uint)PermissionMask.FoldedMask;
tmp |= ((tmp >> (int)PermissionMask.FoldingShift) & (uint)PermissionMask.FoldedMask);
return tmp;
}
}
}
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