[Mono-bugs] [Bug 81257][Cri] New - problem using "double" type parameter to PInvoke on nokia N800

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Changed by tquerci at gmail.com.

http://bugzilla.ximian.com/show_bug.cgi?id=81257

--- shadow/81257	2007-03-28 18:59:19.000000000 -0500
+++ shadow/81257.tmp.6759	2007-03-28 18:59:19.000000000 -0500
@@ -0,0 +1,85 @@
+Bug#: 81257
+Product: Mono: Runtime
+Version: 1.1
+OS: 
+OS Details: Nokia N800 OS
+Status: NEW   
+Resolution: 
+Severity: 
+Priority: Critical
+Component: interop
+AssignedTo: mono-bugs at ximian.com                            
+ReportedBy: tquerci at gmail.com               
+QAContact: mono-bugs at ximian.com
+TargetMilestone: ---
+URL: 
+Cc: 
+Summary: problem using "double" type parameter to PInvoke on nokia N800
+
+I find several bug in some method on Gtk# on maemo platform. In all this
+method there is almost one parametro of "double" type. So I write a simple
+.so library that print the passed value, and integer and a double, add this
+value as return the sun as double.
+
+I try this .so in C program and work. I write a simple C# program and the
+double parameter is always 0.0F.
+
+This code work fine on testing environment but not on real device.
+
+The output from the device is:
+
+INT: 5
+FLOAT: 0,000000
+RET: 5,000000
+Hello World! Ret=5
+
+while the output that I must have will be:
+
+INT: 5
+FLOAT: 3,500000
+RET: 8,500000
+Hello World! Ret=8.5
+
+P.S. sorry for my terrible english :(
+
+---------------------------------- C# Routine ------------------------
+using System;
+using System.Runtime.InteropServices;
+
+namespace test_sotest
+{
+	class MainClass
+	{
+	
+		[DllImport ("sotest.so")]
+        private static extern double sotest_object_testfunc(int a, double b);
+        
+		public static void Main(string[] args)
+		{
+			int a=5;
+			double b=3.5f;
+			double ret=0f;
+			try {
+				ret=sotest_object_testfunc(a, b);
+			} catch (System.DllNotFoundException ex) {
+				Console.WriteLine("Shared Library Not Found."+ex.Message);
+			}
+			
+			Console.WriteLine("Hello World! Ret="+ret);
+		}
+	}
+}
+---------------------------------- C Library -------------------------
+ 
+double sotest_object_testfunc(int a, double b)
+{
+    double ret;
+
+    printf("INT: %i\n",a);
+    printf("FLOAT: %f\n",b);
+
+    ret=b+a;
+
+    printf("RET: %f\n",ret);
+    return ret;
+}