From c77444a8215748633812e67adea8c7ff66a5480d Mon Sep 17 00:00:00 2001 From: "Justin Clark-Casey (justincc)" Date: Fri, 16 Apr 2010 20:40:01 +0100 Subject: [PATCH] Fix http://opensimulator.org/mantis/view.php?id=4657 where OpenSim.Grid.UserServer.exe fails on startup if no previous config probably appears to occur because mono 2.4.2.3 (and possibly later) erroneously returns a value of 0 for BufferWidth and BufferHeight in some circumstances --- OpenSim/Framework/Console/LocalConsole.cs | 63 +++++++++++++++++------ OpenSim/Framework/Util.cs | 2 +- 2 files changed, 48 insertions(+), 17 deletions(-) diff --git a/OpenSim/Framework/Console/LocalConsole.cs b/OpenSim/Framework/Console/LocalConsole.cs index be936b6671..a3036d0df6 100644 --- a/OpenSim/Framework/Console/LocalConsole.cs +++ b/OpenSim/Framework/Console/LocalConsole.cs @@ -38,7 +38,7 @@ namespace OpenSim.Framework.Console { /// /// A console that uses cursor control and color - /// + /// public class LocalConsole : CommandConsole { // private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType); @@ -100,24 +100,40 @@ namespace OpenSim.Framework.Console private int SetCursorTop(int top) { // From at least mono 2.4.2.3, window resizing can give mono an invalid row and column values. If we try - // to set a cursor row position with a currently invalid column, mono will throw an exception. - // Therefore, we need to make sure that the column position is valid first. + // to set a cursor row position with a currently invalid column, mono will throw an exception. + // Therefore, we need to make sure that the column position is valid first. int left = System.Console.CursorLeft; if (left < 0) + { System.Console.CursorLeft = 0; - else if (left >= System.Console.BufferWidth) - System.Console.CursorLeft = System.Console.BufferWidth - 1; + } + else + { + int bw = System.Console.BufferWidth; + + // On Mono 2.4.2.3 (and possibly above), the buffer value is sometimes erroneously zero (Mantis 4657) + if (bw > 0 && left >= bw) + System.Console.CursorLeft = bw - 1; + } if (top < 0) + { top = 0; - if (top >= System.Console.BufferHeight) - top = System.Console.BufferHeight - 1; + } + else + { + int bh = System.Console.BufferHeight; + + // On Mono 2.4.2.3 (and possibly above), the buffer value is sometimes erroneously zero (Mantis 4657) + if (bh > 0 && top >= bh) + top = bh - 1; + } System.Console.CursorTop = top; return top; - } + } /// /// Set the cursor column. @@ -129,23 +145,38 @@ namespace OpenSim.Framework.Console /// /// /// The new cursor column. - /// + /// private int SetCursorLeft(int left) { // From at least mono 2.4.2.3, window resizing can give mono an invalid row and column values. If we try - // to set a cursor column position with a currently invalid row, mono will throw an exception. - // Therefore, we need to make sure that the row position is valid first. + // to set a cursor column position with a currently invalid row, mono will throw an exception. + // Therefore, we need to make sure that the row position is valid first. int top = System.Console.CursorTop; if (top < 0) + { System.Console.CursorTop = 0; - else if (top >= System.Console.BufferHeight) - System.Console.CursorTop = System.Console.BufferHeight - 1; + } + else + { + int bh = System.Console.BufferHeight; + // On Mono 2.4.2.3 (and possibly above), the buffer value is sometimes erroneously zero (Mantis 4657) + if (bh > 0 && top >= bh) + System.Console.CursorTop = bh - 1; + } if (left < 0) + { left = 0; - if (left >= System.Console.BufferWidth) - left = System.Console.BufferWidth - 1; + } + else + { + int bw = System.Console.BufferWidth; + + // On Mono 2.4.2.3 (and possibly above), the buffer value is sometimes erroneously zero (Mantis 4657) + if (bw > 0 && left >= bw) + left = bw - 1; + } System.Console.CursorLeft = left; @@ -183,7 +214,7 @@ namespace OpenSim.Framework.Console System.Console.Write("{0}", prompt); SetCursorTop(new_y); - SetCursorLeft(new_x); + SetCursorLeft(new_x); } } diff --git a/OpenSim/Framework/Util.cs b/OpenSim/Framework/Util.cs index 48435cb90e..ec33b5e4dc 100644 --- a/OpenSim/Framework/Util.cs +++ b/OpenSim/Framework/Util.cs @@ -1441,4 +1441,4 @@ namespace OpenSim.Framework return (diff >= 0) ? diff : (diff + EnvironmentTickCountMask + 1); } } -} +} \ No newline at end of file