private static bool TryConvertToInteropCallingConvention(NativeCallingConvention conv, ref CallingConvention kind)
{
switch (conv)
{
case NativeCallingConvention.WinApi:
kind = CallingConvention.Winapi;
return(true);
case NativeCallingConvention.CDeclaration:
kind = CallingConvention.Cdecl;
return(true);
case NativeCallingConvention.Standard:
kind = CallingConvention.StdCall;
return(true);
default:
return(false);
}
}
static internal CodeAttributeDeclaration CreateUnmanagedFunctionPointerAttribute(NativeCallingConvention conv)
{
CodeAttributeDeclaration attr = new CodeAttributeDeclaration(new CodeTypeReference(typeof(System.Runtime.InteropServices.UnmanagedFunctionPointerAttribute)));
CallingConvention kind = default(CallingConvention);
if (TryConvertToInteropCallingConvention(conv, ref kind))
{
attr.Arguments.Add(new CodeAttributeArgument(new CodeFieldReferenceExpression(new CodeTypeReferenceExpression(typeof(CallingConvention)), kind.ToString())));
}
return(attr);
}
/// <summary>
/// Create a DllImport attribute
/// </summary>
/// <param name="dllName"></param>
/// <param name="entryPoint"></param>
/// <returns></returns>
/// <remarks></remarks>
static internal CodeAttributeDeclaration CreateDllImportAttribute(string dllName, string entryPoint, NativeCallingConvention conv)
{
CodeAttributeDeclaration attr = new CodeAttributeDeclaration(new CodeTypeReference(typeof(System.Runtime.InteropServices.DllImportAttribute)));
attr.Arguments.Add(new CodeAttributeArgument(new CodePrimitiveExpression(dllName)));
attr.Arguments.Add(new CodeAttributeArgument("EntryPoint", new CodePrimitiveExpression(entryPoint)));
// If the calling convention for a DLl is not the standard WinApi then output the extra information
// into the attribute
CallingConvention kind = default(CallingConvention);
if (TryConvertToInteropCallingConvention(conv, ref kind) && kind != CallingConvention.Winapi)
{
attr.Arguments.Add(new CodeAttributeArgument("CallingConvention", new CodeFieldReferenceExpression(new CodeTypeReferenceExpression(typeof(CallingConvention)), kind.ToString())));
}
return(attr);
}
