gstreamer/gstreamer-sharp/Marshaller.cs
2009-09-20 10:22:16 +02:00

44 lines
1.3 KiB
C#

using System;
using System.Runtime.InteropServices;
using Gst.GLib;
namespace Gst {
internal static class Marshaller {
public static IntPtr StringArrayToNullTermPointer (string[] strs) {
if (strs == null)
return IntPtr.Zero;
IntPtr result = Gst.GLib.Marshaller.Malloc ( (ulong) ( (strs.Length + 1) * IntPtr.Size));
for (int i = 0; i < strs.Length; i++)
Marshal.WriteIntPtr (result, i * IntPtr.Size, Gst.GLib.Marshaller.StringToPtrGStrdup (strs [i]));
Marshal.WriteIntPtr (result, strs.Length * IntPtr.Size, IntPtr.Zero);
return result;
}
[DllImport ("libglib-2.0-0.dll") ]
static extern void g_strfreev (IntPtr mem);
public static string[] NullTermPtrToStringArray (IntPtr null_term_array, bool owned) {
if (null_term_array == IntPtr.Zero)
return new string [0];
int count = 0;
System.Collections.ArrayList result = new System.Collections.ArrayList ();
IntPtr s = Marshal.ReadIntPtr (null_term_array, count++ * IntPtr.Size);
while (s != IntPtr.Zero) {
result.Add (Gst.GLib.Marshaller.Utf8PtrToString (s));
s = Marshal.ReadIntPtr (null_term_array, count++ * IntPtr.Size);
}
if (owned)
g_strfreev (null_term_array);
return (string[]) result.ToArray (typeof (string));
}
}
}