[chronojump] SendCurve with try/catch to solve mono <4.4 problems

[Xavier de Blas <xaviblas src gnome org>]

commit 72b74244276f62b4367b9f61ee6124c429598ee8
Author: Xavier de Blas <xaviblas gmail com>
Date:   Wed Apr 26 23:48:01 2017 +0200

    SendCurve with try/catch to solve mono <4.4 problems

 src/encoderCapture.cs |    4 +++-
 src/encoderRProc.cs   |   35 +++++++++++++++++++++++++++++++----
 2 files changed, 34 insertions(+), 5 deletions(-)
---
diff --git a/src/encoderCapture.cs b/src/encoderCapture.cs
index e559eaf..84740e5 100644
--- a/src/encoderCapture.cs
+++ b/src/encoderCapture.cs
@@ -497,10 +497,12 @@ public abstract class EncoderCapture
                                                        if(compujump && Ecca.curvesAccepted == 0)
                                                                Networks.WakeUpRaspberryIfNeeded();
 
-                                                       encoderRProcCapture.SendCurve(
+                                                       bool success = encoderRProcCapture.SendCurve(
                                                                        ecc.startFrame,
                                                                        UtilEncoder.CompressData(curve, 25)   
  //compressed
                                                                        );
+                                                       if(! success)
+                                                               cancel = true;
 
                                                        Ecca.curvesAccepted ++;
                                                        Ecca.ecc.Add(ecc);
diff --git a/src/encoderRProc.cs b/src/encoderRProc.cs
index 158d0e8..2f15f76 100644
--- a/src/encoderRProc.cs
+++ b/src/encoderRProc.cs
@@ -192,7 +192,7 @@ public class EncoderRProcCapture : EncoderRProc
        }
        
        //here curve is sent compressed (string. eg: "0*5 1 0 -1*3 2")
-       public void SendCurve(int startFrame, string curveCompressed)
+       public bool SendCurve(int startFrame, string curveCompressed)
        {
                /*
                 * curveCompressed print has made crash Chronojump once.
@@ -201,12 +201,39 @@ public class EncoderRProcCapture : EncoderRProc
                 */
                //LogB.Information("curveSend [displacement array]",curveCompressed);
 
+
                //since 1.7.1 it's needed to send the startFrame in order to know the startFrame of the 
accepted repetitions (on R)
                //then this data will be used to save the "Best?" repetitions on C# without calling curves on 
cont mode
-               p.StandardInput.WriteLine(startFrame.ToString());
 
-               p.StandardInput.WriteLine(curveCompressed);     //this will send some lines because 
compressed data comes with '\n's
-               p.StandardInput.WriteLine("E");         //this will mean the 'E'nd of the curve. Then data 
can be uncompressed on R
+               //TODO: a try/catch coluld be good here to solve this errors:
+               //System.IO.IOException: Write fault on path 
/home/(user)/informatica/progs_meus/chronojump/chronojump/[Unknown]
+               //  at System.IO.FileStream.WriteInternal (System.Byte[] src, Int32 offset, Int32 count) 
[0x00000] in <filename unknown>:0
+               //  at System.IO.FileStream.Write (System.Byte[] array, Int32 offset, Int32 count) [0x00000] 
in <filename unknown>:0
+               //  at System.IO.StreamWriter.FlushBytes () [0x00000] in <filename unknown>:0
+               //  at System.IO.StreamWriter.FlushCore () [0x00000] in <filename unknown>:0
+               //  at System.IO.StreamWriter.Write (System.String value) [0x00000] in <filename unknown>:0
+               //  at System.IO.TextWriter.WriteLine (System.String value) [0x00000] in <filename unknown>:0
+               //  at EncoderRProcCapture.SendCurve (Int32 startFrame, System.String curveCompressed) 
[0x00000] in <filename unknown>:0
+               //  at EncoderCapture.Capture (System.String outputData1, EncoderRProcCapture 
encoderRProcCapture, Boolean compujump) [0x00000] in <filename unknown>:0
+               //  at ChronoJumpWindow.encoderDoCaptureCsharp () [0x00000] in <filename unknown>:0
+               //
+               // maybe R capture process is dead
+               // this happened capturing after a 20 minutes delay
+
+               /*
+                * "Write fault on path" error fixed on Mono 4.4:
+                * http://www.mono-project.com/docs/about-mono/releases/4.4.0/
+                * https://bugzilla.xamarin.com/show_bug.cgi?id=32905
+                */
+               try {
+                       p.StandardInput.WriteLine(startFrame.ToString());
+                       p.StandardInput.WriteLine(curveCompressed);     //this will send some lines because 
compressed data comes with '\n's
+                       p.StandardInput.WriteLine("E");         //this will mean the 'E'nd of the curve. Then 
data can be uncompressed on R
+               } catch {
+                       return false;
+               }
+
+               return true;
        }
 
        protected override void writeOptionsFile()