/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Windows CE Reflect
 *
 * The Initial Developer of the Original Code is John Wolfe
 * Portions created by the Initial Developer are Copyright (C) 2005
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

/* Platform specific code to invoke XPCOM methods on native objects */

#include "prlog.h"

#include "xptcprivate.h"

extern "C" PRUint32 *
writeArgs(PRUint32 *d,
          PRUint32  paramCount,
          nsXPTCVariant *params)
{
  // For each parameter in params, either push it to the stack. The first
  // three registers want to be in registers, but for the sake of simplicity
  // we push them onto the stack here and pull them off in assembly before
  // actually calling the target method.
  
  // NOTE: The arguments in 'params' are in reverse order!
  
  // NOTE: This only implements the legacy ABI as WinCE does not support
  // the (more efficient) EABI.
  
  // NOTE: We assume that we can extend the stack as far as we like. C(++)
  // makes the same assumption anyway, so this should be safe.
  d--;
  for (nsXPTCVariant * s = &params[paramCount-1]; paramCount != 0; paramCount--, s--, d--) {
    // IsPtrData is (for some reason) a special case, and doesn't use the
    // 'type' field.
    if(s->IsPtrData())
        {
            *((void**)d) = s->ptr;
            continue;
        }
        switch(s->type)
        {
        case nsXPTType::T_I8     :  *((PRInt32*)   d) = s->val.i8;     break;
        case nsXPTType::T_I16    :  *((PRInt32*)   d) = s->val.i16;    break;
        case nsXPTType::T_I32    :  *((PRInt32*)   d) = s->val.i32;    break;
        case nsXPTType::T_I64    :  *((PRInt64*) --d) = s->val.i64;    break;
        case nsXPTType::T_U8     :  *((PRUint32*)  d) = s->val.u8;     break;
        case nsXPTType::T_U16    :  *((PRUint32*)  d) = s->val.u16;    break;
        case nsXPTType::T_U32    :  *((PRUint32*)  d) = s->val.u32;    break;
        case nsXPTType::T_U64    :  *((PRUint64*)--d) = s->val.u64;    break;
        case nsXPTType::T_FLOAT  :  *((float*)     d) = s->val.f;      break;
        case nsXPTType::T_DOUBLE :  *((double*)  --d) = s->val.d;      break;
        case nsXPTType::T_BOOL   :  *((PRInt32*)   d) = s->val.b;      break;
        case nsXPTType::T_CHAR   :  *((PRInt32*)   d) = s->val.c;      break;
        case nsXPTType::T_WCHAR  :  *((PRInt32*)   d) = s->val.wc;     break;
        default:
            // all the others are plain pointer types
            *((void**)d) = s->val.p;
            break;
        }

  }
  return ++d;
}

extern "C" nsresult
asmXPTC_InvokeByIndex(nsISupports* that,
		      PRUint32 methodIndex,
		      PRUint32 paramCount,
		      nsXPTCVariant* params);  

extern "C" NS_EXPORT  nsresult NS_FROZENCALL
NS_InvokeByIndex_P(nsISupports* that, PRUint32 methodIndex,
		   PRUint32 paramCount, nsXPTCVariant* params)
{
  return asmXPTC_InvokeByIndex(that, methodIndex, paramCount, params);
}


int g_xptcinvokece_marker;