/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

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

#include "xptcprivate.h"

extern "C" uint32_t
invoke_count_words(uint32_t paramCount, nsXPTCVariant* s)
{
    uint32_t result = 0;
    /*    fprintf(stderr,"invoke_count_words(%d,%p)\n",paramCount, s);*/

    for(uint32_t i = 0; i < paramCount; i++, s++)
    {
        if(s->IsPtrData())
        {
            result++;
            continue;
        }
        switch(s->type)
        {
        case nsXPTType::T_I8     :
        case nsXPTType::T_I16    :
        case nsXPTType::T_I32    :
            result++;
            break;
        case nsXPTType::T_I64    :
            result+=2;
            break;
        case nsXPTType::T_U8     :
        case nsXPTType::T_U16    :
        case nsXPTType::T_U32    :
            result++;
            break;
        case nsXPTType::T_U64    :
            result+=2;
            break;
        case nsXPTType::T_FLOAT  :
            result++;
            break;
        case nsXPTType::T_DOUBLE :
            result+=2;
            break;
        case nsXPTType::T_BOOL   :
        case nsXPTType::T_CHAR   :
        case nsXPTType::T_WCHAR  :
            result++;
            break;
        default:
            // all the others are plain pointer types
            result++;
            break;
        }
    }
    return result;
}

extern "C" void
invoke_copy_to_stack(uint32_t* d, uint32_t paramCount, nsXPTCVariant* s, double *fprData)
{
	uint32_t fpCount = 0;

    /*    fprintf(stderr,"invoke_copy_to_stack(%p, %d, %p, %p)\n", d, paramCount, s, fprData);*/

    for(uint32_t i = 0; i < paramCount; i++, d++, s++)
    {
        if(s->IsPtrData())
        {
            *((void**)d) = s->ptr;
            continue;
        }
        switch(s->type)
        {
        case nsXPTType::T_I8     : *((int32_t*) d) = s->val.i8;          break;
        case nsXPTType::T_I16    : *((int32_t*) d) = s->val.i16;         break;
        case nsXPTType::T_I32    : *((int32_t*) d) = s->val.i32;         break;
        case nsXPTType::T_I64    : *((int64_t*) d) = s->val.i64; d++;    break;
        case nsXPTType::T_U8     : *((uint32_t*) d) = s->val.u8;          break;
        case nsXPTType::T_U16    : *((uint32_t*)d) = s->val.u16;         break;
        case nsXPTType::T_U32    : *((uint32_t*)d) = s->val.u32;         break;
        case nsXPTType::T_U64    : *((uint64_t*)d) = s->val.u64; d++;    break;
        case nsXPTType::T_FLOAT  : *((float*)   d) = s->val.f;
        			   if (fpCount < 13)
        		               fprData[fpCount++] = s->val.f;
        			   break;
        case nsXPTType::T_DOUBLE : *((double*)  d) = s->val.d;   d++;
        			   if (fpCount < 13)
        			       fprData[fpCount++] = s->val.d;
        			   break;
        case nsXPTType::T_BOOL   : *((uint32_t*) d) = s->val.b;          break;
        case nsXPTType::T_CHAR   : *((int32_t*)  d) = s->val.c;          break;
        case nsXPTType::T_WCHAR  : *((uint32_t*) d) = s->val.wc;         break;
        default:
            // all the others are plain pointer types
            *((void**)d) = s->val.p;
            break;
        }
    }
}

extern "C" nsresult _NS_InvokeByIndex(nsISupports* that, uint32_t methodIndex,
                                      uint32_t paramCount,
                                      nsXPTCVariant* params);

EXPORT_XPCOM_API(nsresult)
NS_InvokeByIndex(nsISupports* that, uint32_t methodIndex,
                 uint32_t paramCount, nsXPTCVariant* params)
{
    return _NS_InvokeByIndex(that, methodIndex, paramCount, params);
}
