[Mono-bugs] [Bug 25360] New - Implement more methods in Marshal class

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Changed by danmorg@sc.rr.com.

http://bugzilla.ximian.com/show_bug.cgi?id=25360

--- shadow/25360	Mon May 27 21:33:13 2002
+++ shadow/25360.tmp.18676	Mon May 27 21:33:13 2002
@@ -0,0 +1,69 @@
+Bug#: 25360
+Product: Mono/Class Libraries
+Version: unspecified
+OS: 
+OS Details: 
+Status: NEW   
+Resolution: 
+Severity: 
+Priority: Wishlist
+Component: CORLIB
+AssignedTo: mono-bugs@ximian.com                            
+ReportedBy: danmorg@sc.rr.com               
+QAContact: mono-bugs@ximian.com
+TargetMilestone: ---
+URL: 
+Cc: 
+Summary: Implement more methods in Marshal class
+
+In corlib.dll, I would like to have more methods in class 
+System.Runtime.InteropServices.Marshal to be implemented.
+I'm not sure of all the classes I will need, but I can tell you some.
+
+The Marshal class is not completely stubbed out either, so it is hard to 
+see what needs to be worked on.  Will most of the Marshal class be 
+implemented in icalls?
+
+1. PtrToStringAnsi().
+=====================
+This is a PtrToStringAuto() that uses an icall and can be found 
+in /mono/metadata/icall.c as 
+
+static MonoString*
+ves_icall_System_Runtime_InteropServices_Marshal_PtrToStringAuto 
+(gpointer ptr)
+
+I suppose this could be used as a base for PtrToStringAnsi.
+In the meantime, I substitute PtrToStringAuto() for PtrToStringAnsi().
+
+2. PtrToStructure.
+==================
+This is how it is being used:
+Field fd = (Field) Marshal.PtrToStructure(MySql.FetchField(res), typeof
+(Field));
+
+Here is the definition for the Field class:
+[StructLayout(LayoutKind.Sequential)]
+public class Field {
+///<value>name of column</value>
+	[MarshalAs(UnmanagedType.LPStr)]
+	public string Name;
+	///<value>table of column</value>
+	[MarshalAs(UnmanagedType.LPStr)]
+	public string Table;
+	///<value>default value</value>
+	[MarshalAs(UnmanagedType.LPStr)]
+	public string Def;
+	///<value>type of field</value>
+	public int FieldTypes;
+	///<value>width of column</value>
+	public uint Length;
+	///<value>max width of selected set</value>
+	public uint MaxLength;
+	///<value>div flags</value>
+	public uint Flags;
+	///<value>number of decimals in field</value>
+	public uint Decimals;	
+}
+
+Note, this code is based on code that works on ms.net.