/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 *
 * 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 mozilla.org code.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1999
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
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 * either of 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"),
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/* Implement shared vtbl methods. */

#include "xptcprivate.h"

/* contributed by bob meader <bob@guiduck.com> */

/*
 * This is for Alpha /NT 32 bits
 *
 * When we're called, the "gp" registers are stored in gprData and
 * the "fp" registers are stored in fprData.  There are 6 regs
 * available which coorespond to the first 5 parameters of the
 * function and the "this" pointer.  If there are additional parms,
 * they are stored on the stack at address "args".
 *
 */
extern "C" nsresult
PrepareAndDispatch(nsXPTCStubBase* self, PRUint32 methodIndex, PRUint64* args,
                   PRUint64 *gprData, double *fprData)
{
#define PARAM_BUFFER_COUNT  16
#define PARAM_GPR_COUNT   5
#define PARAM_FPR_COUNT   5

    nsXPTCMiniVariant paramBuffer[PARAM_BUFFER_COUNT];
    nsXPTCMiniVariant* dispatchParams = NULL;
    nsIInterfaceInfo* iface_info = NULL;
    const nsXPTMethodInfo* info;
    PRUint8 paramCount;
    PRUint8 i;
    nsresult result = NS_ERROR_FAILURE;

    NS_ASSERTION(self,"no self");

    self->GetInterfaceInfo(&iface_info);
    NS_ASSERTION(iface_info,"no interface info");

    iface_info->GetMethodInfo(PRUint16(methodIndex), &info);
    NS_ASSERTION(info,"no interface info");

    paramCount = info->GetParamCount();

    // setup variant array pointer
    if(paramCount > PARAM_BUFFER_COUNT)
        dispatchParams = new nsXPTCMiniVariant[paramCount];
    else
        dispatchParams = paramBuffer;
    NS_ASSERTION(dispatchParams,"no place for params");

    PRUint64* ap = args;
    PRUint32 iCount = 0;
    for(i = 0; i < paramCount; i++)
    {
        const nsXPTParamInfo& param = info->GetParam(i);
        const nsXPTType& type = param.GetType();
        nsXPTCMiniVariant* dp = &dispatchParams[i];

        if(param.IsOut() || !type.IsArithmetic())
        {
            if (iCount < PARAM_GPR_COUNT)
             dp->val.p = (void*)gprData[iCount++];
            else
             dp->val.p = (void*)ap++;			
            continue;
        }
        // else
        switch(type)
        {
        case nsXPTType::T_I8:
           if (iCount < PARAM_GPR_COUNT)
              dp->val.i8  = (PRInt8)gprData[iCount++];
           else
              dp->val.i8  = *((PRInt8*)ap++);
           break;

        case nsXPTType::T_I16:
            if (iCount < PARAM_GPR_COUNT)
               dp->val.i16  = (PRInt16)gprData[iCount++];
            else
               dp->val.i16  = *((PRInt16*)ap++);
            break;

        case nsXPTType::T_I32:
            if (iCount < PARAM_GPR_COUNT)
               dp->val.i32  = (PRInt32)gprData[iCount++];
            else
               dp->val.i32  = *((PRInt32*)ap++);
            break;

        case nsXPTType::T_I64:
            if (iCount < PARAM_GPR_COUNT)
               dp->val.i64  = (PRInt64)gprData[iCount++];
            else
               dp->val.i64  = *((PRInt64*)ap++);
            break;

        case nsXPTType::T_U8:
            if (iCount < PARAM_GPR_COUNT)
               dp->val.u8  = (PRUint8)gprData[iCount++];
            else
               dp->val.u8  = *((PRUint8*)ap++);
            break;

        case nsXPTType::T_U16:
            if (iCount < PARAM_GPR_COUNT)
               dp->val.u16  = (PRUint16)gprData[iCount++];
            else
                dp->val.u16  = *((PRUint16*)ap++);
            break;

        case nsXPTType::T_U32:
            if (iCount < PARAM_GPR_COUNT)
               dp->val.u32  = (PRUint32)gprData[iCount++];
            else
               dp->val.u32  = *((PRUint32*)ap++);
            break;

        case nsXPTType::T_U64:
            if (iCount < PARAM_GPR_COUNT)
               dp->val.u64  = (PRUint64)gprData[iCount++];
            else
               dp->val.u64  = (PRUint64)*ap++;
            break;

        case nsXPTType::T_FLOAT:
             if (iCount < PARAM_FPR_COUNT)
                dp->val.f  = (float)fprData[iCount++];
             else
                dp->val.f  = *((float*)ap++);
             break;

        case nsXPTType::T_DOUBLE:
              if (iCount < PARAM_FPR_COUNT)
                 dp->val.d  = (double)fprData[iCount++];
              else
                 dp->val.d  = *((double*)ap++);
              break;

        case nsXPTType::T_BOOL:
           if (iCount < PARAM_GPR_COUNT)
              dp->val.b  = (PRBool)gprData[iCount++];
           else
              dp->val.b  = *((PRBool*)ap++);
           break;

        case nsXPTType::T_CHAR:
           if (iCount < PARAM_GPR_COUNT)
              dp->val.c  = (char)gprData[iCount++];
           else
              dp->val.c  = *((char*)ap++);
           break;

        case nsXPTType::T_WCHAR:
           if (iCount < PARAM_GPR_COUNT)
              dp->val.wc  = (wchar_t)gprData[iCount++];
           else
              dp->val.wc  = *((wchar_t*)ap++);
           break;

        default:
            NS_ASSERTION(0, "bad type");
            break;
        }
    }

    result = self->CallMethod((PRUint16)methodIndex, info, dispatchParams);

    NS_RELEASE(iface_info);

    if(dispatchParams != paramBuffer)
        delete [] dispatchParams;

    return result;
}

#define STUB_ENTRY(n)  /* defined in the assembly file */

#define SENTINEL_ENTRY(n) \
nsresult nsXPTCStubBase::Sentinel##n() \
{ \
    NS_ASSERTION(0,"nsXPTCStubBase::Sentinel called"); \
    return NS_ERROR_NOT_IMPLEMENTED; \
}

#include "xptcstubsdef.inc"

void
xptc_dummy()
{
}

