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/* Implement shared vtbl methods */

// This is a 98% copy of other implementations; see comment at top of
// xptcinvoke_emx.cpp for why this file exists.
//

#include "xptcprivate.h"

#if !defined(__EMX__)
#error "This code is for OS/2 EMX only"
#endif

static nsresult
PrepareAndDispatch( nsXPTCStubBase *self, PRUint32 methodIndex,
                    PRUint32 *args)
{
#define PARAM_BUFFER_COUNT     16

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

    // If anything fails before stackBytesToPop can be set then
    // the failure is completely catastrophic!

    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");

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

        if(param.IsOut() || !type.IsArithmetic())
        {
            dp->val.p = (void*) *ap;
            continue;
        }
        // else
        switch(type)
        {
        case nsXPTType::T_I8     : dp->val.i8  = *((PRInt8*)  ap);       break;
        case nsXPTType::T_I16    : dp->val.i16 = *((PRInt16*) ap);       break;
        case nsXPTType::T_I32    : dp->val.i32 = *((PRInt32*) ap);       break;
        case nsXPTType::T_I64    : dp->val.i64 = *((PRInt64*) ap); ap++; break;
        case nsXPTType::T_U8     : dp->val.u8  = *((PRUint8*) ap);       break;
        case nsXPTType::T_U16    : dp->val.u16 = *((PRUint16*)ap);       break;
        case nsXPTType::T_U32    : dp->val.u32 = *((PRUint32*)ap);       break;
        case nsXPTType::T_U64    : dp->val.u64 = *((PRUint64*)ap); ap++; break;
        case nsXPTType::T_FLOAT  : dp->val.f   = *((float*)   ap);       break;
        case nsXPTType::T_DOUBLE : dp->val.d   = *((double*)  ap); ap++; break;
        case nsXPTType::T_BOOL   : dp->val.b   = *((PRBool*)  ap);       break;
        case nsXPTType::T_CHAR   : dp->val.c   = *((char*)    ap);       break;
        case nsXPTType::T_WCHAR  : 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) \
nsresult nsXPTCStubBase::Stub##n() \
{ \
  register void* method = PrepareAndDispatch; \
  register nsresult result; \
  __asm__ __volatile__( \
    "leal   0x0c(%%ebp), %%ecx\n\t"    /* args */ \
    "pushl  %%ecx\n\t" \
    "pushl  $"#n"\n\t"                 /* method index */ \
    "movl   0x08(%%ebp), %%ecx\n\t"    /* this */ \
    "pushl  %%ecx\n\t" \
    "call   *%%edx"                    /* PrepareAndDispatch */ \
    : "=a" (result)     /* %0 */ \
    : "d" (method)      /* %1 */ \
    : "ax", "dx", "cx", "memory" ); \
    return result; \
}

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

#include "xptcstubsdef.inc"