---- Reported by r.gerosa@gmail.com 2006-03-30 05:57:08 MST ----

Description of Problem:
When specifying the [StructLayout(CharSet=CharSet.Ansi)] in a struct
and using Marshal.PtrToStructure to get the structure from a buffer,
if there is a fixed size char array in the struct, it is
marshaled as unicode chars (2 bytes), it should instead read 
ansi chars (1 byte)


Steps to reproduce the problem:
1. Define a struct decorated with
[StructLayout(LayoutKind.Sequential,CharSet=CharSet.Ansi)]
and containing a fixed sixe char array: 
[MarshalAs (UnmanagedType.ByValArray, SizeConst=4)]
public char[] test;   
2. Unmarshal the struct from a buffer, using Marshal.PtrToStructure
3. The result is wrong

here is an example of c# code reproducing the problem:

using System;
using System.Runtime.InteropServices;

namespace test
{
    [StructLayout(LayoutKind.Sequential, CharSet=CharSet.Ansi)]
    public struct TestStruct1 {
        [MarshalAs (UnmanagedType.ByValArray, SizeConst=4)]
        public char[] test;    
    }
        
    class MainClass
    {
        public static void Main(string[] args)
        {
            GCHandle handle;
            byte[] buffer = new byte[4]
{(byte)'t',(byte)'e',(byte)'s',(byte)'t'};
            int structSize = Marshal.SizeOf(typeof(TestStruct1));
            Console.WriteLine("struct size: " + structSize);
            handle = GCHandle.Alloc(buffer, GCHandleType.Pinned);
            TestStruct1 testStruct1 = (TestStruct1) Marshal.PtrToStructure(
                handle.AddrOfPinnedObject(),typeof(TestStruct1));
            handle.Free();
            Console.WriteLine("value: " + new String(testStruct1.test));
        }
    }
}

Actual Results:
struct size: 8
value: ??

Expected Results:
struct size: 4
value: test

How often does this happen? 
always

Additional Information:
the expected result is the one returned using .NET



---- Additional Comments From vargaz@gmail.com 2006-04-07 11:22:46 MST ----

Fixed in SVN.



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   <cf_op_sys_details>Arch Linux 7.1</cf_op_sys_details>
Unknown operating system unknown. Setting to default OS "Other".