Sweden-Number/dlls/jscript/function.c

819 lines
23 KiB
C

/*
* Copyright 2008 Jacek Caban for CodeWeavers
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "jscript.h"
#include "engine.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(jscript);
typedef struct {
DispatchEx dispex;
builtin_invoke_t value_proc;
const WCHAR *name;
DWORD flags;
source_elements_t *source;
parameter_t *parameters;
scope_chain_t *scope_chain;
parser_ctx_t *parser;
const WCHAR *src_str;
DWORD src_len;
DWORD length;
} FunctionInstance;
static inline FunctionInstance *function_from_vdisp(vdisp_t *vdisp)
{
return (FunctionInstance*)vdisp->u.jsdisp;
}
static inline FunctionInstance *function_this(vdisp_t *jsthis)
{
return is_vclass(jsthis, JSCLASS_FUNCTION) ? function_from_vdisp(jsthis) : NULL;
}
static const WCHAR prototypeW[] = {'p','r','o','t','o','t', 'y', 'p','e',0};
static const WCHAR lengthW[] = {'l','e','n','g','t','h',0};
static const WCHAR toStringW[] = {'t','o','S','t','r','i','n','g',0};
static const WCHAR applyW[] = {'a','p','p','l','y',0};
static const WCHAR callW[] = {'c','a','l','l',0};
static IDispatch *get_this(DISPPARAMS *dp)
{
DWORD i;
for(i=0; i < dp->cNamedArgs; i++) {
if(dp->rgdispidNamedArgs[i] == DISPID_THIS) {
if(V_VT(dp->rgvarg+i) == VT_DISPATCH)
return V_DISPATCH(dp->rgvarg+i);
WARN("This is not VT_DISPATCH\n");
return NULL;
}
}
TRACE("no this passed\n");
return NULL;
}
static HRESULT init_parameters(DispatchEx *var_disp, FunctionInstance *function, DISPPARAMS *dp,
jsexcept_t *ei, IServiceProvider *caller)
{
parameter_t *param;
VARIANT var_empty;
DWORD cargs, i=0;
HRESULT hres;
V_VT(&var_empty) = VT_EMPTY;
cargs = arg_cnt(dp);
for(param = function->parameters; param; param = param->next) {
hres = jsdisp_propput_name(var_disp, param->identifier,
i < cargs ? get_arg(dp,i) : &var_empty, ei, caller);
if(FAILED(hres))
return hres;
i++;
}
return S_OK;
}
static HRESULT Arguments_value(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DISPPARAMS *dp,
VARIANT *retv, jsexcept_t *ei, IServiceProvider *caller)
{
FIXME("\n");
return E_NOTIMPL;
}
static const builtin_info_t Arguments_info = {
JSCLASS_ARGUMENTS,
{NULL, Arguments_value, 0},
0, NULL,
NULL,
NULL
};
static HRESULT create_arguments(script_ctx_t *ctx, IDispatch *calee, DISPPARAMS *dp,
jsexcept_t *ei, IServiceProvider *caller, DispatchEx **ret)
{
DispatchEx *args;
VARIANT var;
DWORD i;
HRESULT hres;
static const WCHAR caleeW[] = {'c','a','l','l','e','e',0};
args = heap_alloc_zero(sizeof(DispatchEx));
if(!args)
return E_OUTOFMEMORY;
hres = init_dispex_from_constr(args, ctx, &Arguments_info, ctx->object_constr);
if(FAILED(hres)) {
heap_free(args);
return hres;
}
for(i=0; i < arg_cnt(dp); i++) {
hres = jsdisp_propput_idx(args, i, get_arg(dp,i), ei, caller);
if(FAILED(hres))
break;
}
if(SUCCEEDED(hres)) {
V_VT(&var) = VT_I4;
V_I4(&var) = arg_cnt(dp);
hres = jsdisp_propput_name(args, lengthW, &var, ei, caller);
if(SUCCEEDED(hres)) {
V_VT(&var) = VT_DISPATCH;
V_DISPATCH(&var) = calee;
hres = jsdisp_propput_name(args, caleeW, &var, ei, caller);
}
}
if(FAILED(hres)) {
jsdisp_release(args);
return hres;
}
*ret = args;
return S_OK;
}
static HRESULT create_var_disp(script_ctx_t *ctx, FunctionInstance *function, DISPPARAMS *dp, jsexcept_t *ei,
IServiceProvider *caller, DispatchEx **ret)
{
DispatchEx *var_disp, *arg_disp;
HRESULT hres;
static const WCHAR argumentsW[] = {'a','r','g','u','m','e','n','t','s',0};
hres = create_dispex(ctx, NULL, NULL, &var_disp);
if(FAILED(hres))
return hres;
hres = create_arguments(ctx, (IDispatch*)_IDispatchEx_(&function->dispex),
dp, ei, caller, &arg_disp);
if(SUCCEEDED(hres)) {
VARIANT var;
V_VT(&var) = VT_DISPATCH;
V_DISPATCH(&var) = (IDispatch*)_IDispatchEx_(arg_disp);
hres = jsdisp_propput_name(var_disp, argumentsW, &var, ei, caller);
jsdisp_release(arg_disp);
}
if(SUCCEEDED(hres))
hres = init_parameters(var_disp, function, dp, ei, caller);
if(FAILED(hres)) {
jsdisp_release(var_disp);
return hres;
}
*ret = var_disp;
return S_OK;
}
static HRESULT invoke_source(script_ctx_t *ctx, FunctionInstance *function, IDispatch *this_obj, DISPPARAMS *dp,
VARIANT *retv, jsexcept_t *ei, IServiceProvider *caller)
{
DispatchEx *var_disp;
exec_ctx_t *exec_ctx;
scope_chain_t *scope;
HRESULT hres;
if(!function->source) {
FIXME("no source\n");
return E_FAIL;
}
hres = create_var_disp(ctx, function, dp, ei, caller, &var_disp);
if(FAILED(hres))
return hres;
hres = scope_push(function->scope_chain, var_disp, &scope);
if(SUCCEEDED(hres)) {
hres = create_exec_ctx(ctx, this_obj, var_disp, scope, &exec_ctx);
scope_release(scope);
}
jsdisp_release(var_disp);
if(FAILED(hres))
return hres;
hres = exec_source(exec_ctx, function->parser, function->source, EXECT_FUNCTION, ei, retv);
exec_release(exec_ctx);
return hres;
}
static HRESULT invoke_constructor(script_ctx_t *ctx, FunctionInstance *function, DISPPARAMS *dp,
VARIANT *retv, jsexcept_t *ei, IServiceProvider *caller)
{
DispatchEx *this_obj;
VARIANT var;
HRESULT hres;
hres = create_object(ctx, &function->dispex, &this_obj);
if(FAILED(hres))
return hres;
hres = invoke_source(ctx, function, (IDispatch*)_IDispatchEx_(this_obj), dp, &var, ei, caller);
if(FAILED(hres)) {
jsdisp_release(this_obj);
return hres;
}
V_VT(retv) = VT_DISPATCH;
if(V_VT(&var) == VT_DISPATCH) {
jsdisp_release(this_obj);
V_DISPATCH(retv) = V_DISPATCH(&var);
}else {
VariantClear(&var);
V_DISPATCH(retv) = (IDispatch*)_IDispatchEx_(this_obj);
}
return S_OK;
}
static HRESULT invoke_value_proc(script_ctx_t *ctx, FunctionInstance *function, IDispatch *this_disp, WORD flags, DISPPARAMS *dp,
VARIANT *retv, jsexcept_t *ei, IServiceProvider *caller)
{
vdisp_t vthis;
HRESULT hres;
if(this_disp)
set_disp(&vthis, this_disp);
else if(ctx->host_global)
set_disp(&vthis, ctx->host_global);
else
set_jsdisp(&vthis, ctx->global);
hres = function->value_proc(ctx, &vthis, flags, dp, retv, ei, caller);
vdisp_release(&vthis);
return hres;
}
static HRESULT call_function(script_ctx_t *ctx, FunctionInstance *function, IDispatch *this_obj, DISPPARAMS *args,
VARIANT *retv, jsexcept_t *ei, IServiceProvider *caller)
{
if(function->value_proc)
return invoke_value_proc(ctx, function, this_obj, DISPATCH_METHOD, args, retv, ei, caller);
return invoke_source(ctx, function, this_obj, args, retv, ei, caller);
}
static HRESULT function_to_string(FunctionInstance *function, BSTR *ret)
{
BSTR str;
static const WCHAR native_prefixW[] = {'\n','f','u','n','c','t','i','o','n',' '};
static const WCHAR native_suffixW[] =
{'(',')',' ','{','\n',' ',' ',' ',' ','[','n','a','t','i','v','e',' ','c','o','d','e',']','\n','}','\n'};
if(function->value_proc) {
DWORD name_len;
name_len = strlenW(function->name);
str = SysAllocStringLen(NULL, sizeof(native_prefixW) + name_len*sizeof(WCHAR) + sizeof(native_suffixW));
if(!str)
return E_OUTOFMEMORY;
memcpy(str, native_prefixW, sizeof(native_prefixW));
memcpy(str + sizeof(native_prefixW)/sizeof(WCHAR), function->name, name_len*sizeof(WCHAR));
memcpy(str + sizeof(native_prefixW)/sizeof(WCHAR) + name_len, native_suffixW, sizeof(native_suffixW));
}else {
str = SysAllocStringLen(function->src_str, function->src_len);
if(!str)
return E_OUTOFMEMORY;
}
*ret = str;
return S_OK;
}
static HRESULT Function_length(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DISPPARAMS *dp,
VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
{
FunctionInstance *This = function_from_vdisp(jsthis);
TRACE("%p %d\n", This, This->length);
switch(flags) {
case DISPATCH_PROPERTYGET:
V_VT(retv) = VT_I4;
V_I4(retv) = This->length;
break;
default:
FIXME("unimplemented flags %x\n", flags);
return E_NOTIMPL;
}
return S_OK;
}
static HRESULT Function_toString(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DISPPARAMS *dp,
VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
{
FunctionInstance *function;
BSTR str;
HRESULT hres;
TRACE("\n");
if(!(function = function_this(jsthis)))
return throw_type_error(ctx, ei, IDS_NOT_FUNC, NULL);
hres = function_to_string(function, &str);
if(FAILED(hres))
return hres;
if(retv) {
V_VT(retv) = VT_BSTR;
V_BSTR(retv) = str;
}else {
SysFreeString(str);
}
return S_OK;
}
static HRESULT array_to_args(script_ctx_t *ctx, DispatchEx *arg_array, jsexcept_t *ei, IServiceProvider *caller,
DISPPARAMS *args)
{
VARIANT var, *argv;
DWORD length, i;
HRESULT hres;
hres = jsdisp_propget_name(arg_array, lengthW, &var, ei, NULL/*FIXME*/);
if(FAILED(hres))
return hres;
hres = to_uint32(ctx, &var, ei, &length);
VariantClear(&var);
if(FAILED(hres))
return hres;
argv = heap_alloc(length * sizeof(VARIANT));
if(!argv)
return E_OUTOFMEMORY;
for(i=0; i<length; i++) {
hres = jsdisp_propget_idx(arg_array, i, argv+i, ei, caller);
if(FAILED(hres)) {
while(i--)
VariantClear(argv+i);
heap_free(argv);
return hres;
}
}
args->cArgs = length;
args->rgvarg = argv;
return S_OK;
}
static HRESULT Function_apply(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DISPPARAMS *dp,
VARIANT *retv, jsexcept_t *ei, IServiceProvider *caller)
{
FunctionInstance *function;
DISPPARAMS args = {NULL,NULL,0,0};
DWORD argc, i;
IDispatch *this_obj = NULL;
HRESULT hres = S_OK;
TRACE("\n");
if(!(function = function_this(jsthis)))
return throw_type_error(ctx, ei, IDS_NOT_FUNC, NULL);
argc = arg_cnt(dp);
if(argc) {
VARIANT *v = get_arg(dp,0);
if(V_VT(v) != VT_EMPTY && V_VT(v) != VT_NULL) {
hres = to_object(ctx, v, &this_obj);
if(FAILED(hres))
return hres;
}
}
if(argc >= 2) {
DispatchEx *arg_array = NULL;
if(V_VT(get_arg(dp,1)) == VT_DISPATCH) {
arg_array = iface_to_jsdisp((IUnknown*)V_DISPATCH(get_arg(dp,1)));
if(arg_array &&
(!is_class(arg_array, JSCLASS_ARRAY) && !is_class(arg_array, JSCLASS_ARGUMENTS) )) {
jsdisp_release(arg_array);
arg_array = NULL;
}
}
if(arg_array) {
hres = array_to_args(ctx, arg_array, ei, caller, &args);
jsdisp_release(arg_array);
}else {
FIXME("throw TypeError\n");
hres = E_FAIL;
}
}
hres = call_function(ctx, function, this_obj, &args, retv, ei, caller);
if(this_obj)
IDispatch_Release(this_obj);
for(i=0; i<args.cArgs; i++)
VariantClear(args.rgvarg+i);
heap_free(args.rgvarg);
return hres;
}
static HRESULT Function_call(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DISPPARAMS *dp,
VARIANT *retv, jsexcept_t *ei, IServiceProvider *caller)
{
FunctionInstance *function;
DISPPARAMS args = {NULL,NULL,0,0};
IDispatch *this_obj = NULL;
DWORD argc;
HRESULT hres;
TRACE("\n");
if(!(function = function_this(jsthis)))
return throw_type_error(ctx, ei, IDS_NOT_FUNC, NULL);
argc = arg_cnt(dp);
if(argc) {
VARIANT *v = get_arg(dp,0);
if(V_VT(v) != VT_EMPTY && V_VT(v) != VT_NULL) {
hres = to_object(ctx, v, &this_obj);
if(FAILED(hres))
return hres;
}
args.cArgs = argc-1;
}
if(args.cArgs)
args.rgvarg = dp->rgvarg + dp->cArgs - args.cArgs-1;
hres = call_function(ctx, function, this_obj, &args, retv, ei, caller);
if(this_obj)
IDispatch_Release(this_obj);
return hres;
}
HRESULT Function_value(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DISPPARAMS *dp,
VARIANT *retv, jsexcept_t *ei, IServiceProvider *caller)
{
FunctionInstance *function;
TRACE("\n");
if(!is_vclass(jsthis, JSCLASS_FUNCTION)) {
ERR("dispex is not a function\n");
return E_FAIL;
}
function = (FunctionInstance*)jsthis->u.jsdisp;
switch(flags) {
case DISPATCH_METHOD:
if(function->value_proc)
return invoke_value_proc(ctx, function, get_this(dp), flags, dp, retv, ei, caller);
return invoke_source(ctx, function, get_this(dp), dp, retv, ei, caller);
case DISPATCH_PROPERTYGET: {
HRESULT hres;
BSTR str;
hres = function_to_string(function, &str);
if(FAILED(hres))
return hres;
V_VT(retv) = VT_BSTR;
V_BSTR(retv) = str;
break;
}
case DISPATCH_CONSTRUCT:
if(function->value_proc)
return invoke_value_proc(ctx, function, get_this(dp), flags, dp, retv, ei, caller);
return invoke_constructor(ctx, function, dp, retv, ei, caller);
default:
FIXME("not implemented flags %x\n", flags);
return E_NOTIMPL;
}
return S_OK;
}
static void Function_destructor(DispatchEx *dispex)
{
FunctionInstance *This = (FunctionInstance*)dispex;
if(This->parser)
parser_release(This->parser);
if(This->scope_chain)
scope_release(This->scope_chain);
heap_free(This);
}
static const builtin_prop_t Function_props[] = {
{applyW, Function_apply, PROPF_METHOD|2},
{callW, Function_call, PROPF_METHOD|1},
{lengthW, Function_length, 0},
{toStringW, Function_toString, PROPF_METHOD}
};
static const builtin_info_t Function_info = {
JSCLASS_FUNCTION,
{NULL, Function_value, 0},
sizeof(Function_props)/sizeof(*Function_props),
Function_props,
Function_destructor,
NULL
};
static HRESULT create_function(script_ctx_t *ctx, const builtin_info_t *builtin_info, DWORD flags,
BOOL funcprot, DispatchEx *prototype, FunctionInstance **ret)
{
FunctionInstance *function;
HRESULT hres;
function = heap_alloc_zero(sizeof(FunctionInstance));
if(!function)
return E_OUTOFMEMORY;
if(funcprot)
hres = init_dispex(&function->dispex, ctx, &Function_info, prototype);
else if(builtin_info)
hres = init_dispex_from_constr(&function->dispex, ctx, builtin_info, ctx->function_constr);
else
hres = init_dispex_from_constr(&function->dispex, ctx, &Function_info, ctx->function_constr);
if(FAILED(hres))
return hres;
function->flags = flags;
function->length = flags & PROPF_ARGMASK;
*ret = function;
return S_OK;
}
static HRESULT set_prototype(script_ctx_t *ctx, DispatchEx *dispex, DispatchEx *prototype)
{
jsexcept_t jsexcept;
VARIANT var;
V_VT(&var) = VT_DISPATCH;
V_DISPATCH(&var) = (IDispatch*)_IDispatchEx_(prototype);
memset(&jsexcept, 0, sizeof(jsexcept));
return jsdisp_propput_name(dispex, prototypeW, &var, &jsexcept, NULL/*FIXME*/);
}
HRESULT create_builtin_function(script_ctx_t *ctx, builtin_invoke_t value_proc, const WCHAR *name,
const builtin_info_t *builtin_info, DWORD flags, DispatchEx *prototype, DispatchEx **ret)
{
FunctionInstance *function;
HRESULT hres;
hres = create_function(ctx, builtin_info, flags, FALSE, NULL, &function);
if(FAILED(hres))
return hres;
hres = set_prototype(ctx, &function->dispex, prototype);
if(FAILED(hres)) {
jsdisp_release(&function->dispex);
return hres;
}
function->value_proc = value_proc;
function->name = name;
*ret = &function->dispex;
return S_OK;
}
HRESULT create_source_function(parser_ctx_t *ctx, parameter_t *parameters, source_elements_t *source,
scope_chain_t *scope_chain, const WCHAR *src_str, DWORD src_len, DispatchEx **ret)
{
FunctionInstance *function;
DispatchEx *prototype;
parameter_t *iter;
DWORD length = 0;
HRESULT hres;
hres = create_object(ctx->script, NULL, &prototype);
if(FAILED(hres))
return hres;
hres = create_function(ctx->script, NULL, PROPF_CONSTR, FALSE, NULL, &function);
if(SUCCEEDED(hres)) {
hres = set_prototype(ctx->script, &function->dispex, prototype);
if(FAILED(hres))
jsdisp_release(&function->dispex);
}
jsdisp_release(prototype);
if(FAILED(hres))
return hres;
function->source = source;
function->parameters = parameters;
if(scope_chain) {
scope_addref(scope_chain);
function->scope_chain = scope_chain;
}
parser_addref(ctx);
function->parser = ctx;
for(iter = parameters; iter; iter = iter->next)
length++;
function->length = length;
function->src_str = src_str;
function->src_len = src_len;
*ret = &function->dispex;
return S_OK;
}
static HRESULT construct_function(script_ctx_t *ctx, DISPPARAMS *dp, jsexcept_t *ei, IDispatch **ret)
{
function_expression_t *expr;
WCHAR *str = NULL, *ptr;
DWORD argc, len = 0, l;
parser_ctx_t *parser;
DispatchEx *function;
BSTR *params = NULL;
int i=0, j=0;
HRESULT hres = S_OK;
static const WCHAR function_anonymousW[] = {'f','u','n','c','t','i','o','n',' ','a','n','o','n','y','m','o','u','s','('};
static const WCHAR function_beginW[] = {')',' ','{','\n'};
static const WCHAR function_endW[] = {'\n','}',0};
argc = arg_cnt(dp);
if(argc) {
params = heap_alloc(argc*sizeof(BSTR));
if(!params)
return E_OUTOFMEMORY;
if(argc > 2)
len = (argc-2)*2; /* separating commas */
for(i=0; i < argc; i++) {
hres = to_string(ctx, get_arg(dp,i), ei, params+i);
if(FAILED(hres))
break;
len += SysStringLen(params[i]);
}
}
if(SUCCEEDED(hres)) {
len += (sizeof(function_anonymousW) + sizeof(function_beginW) + sizeof(function_endW)) / sizeof(WCHAR);
str = heap_alloc(len*sizeof(WCHAR));
if(str) {
memcpy(str, function_anonymousW, sizeof(function_anonymousW));
ptr = str + sizeof(function_anonymousW)/sizeof(WCHAR);
if(argc > 1) {
while(1) {
l = SysStringLen(params[j]);
memcpy(ptr, params[j], l*sizeof(WCHAR));
ptr += l;
if(++j == argc-1)
break;
*ptr++ = ',';
*ptr++ = ' ';
}
}
memcpy(ptr, function_beginW, sizeof(function_beginW));
ptr += sizeof(function_beginW)/sizeof(WCHAR);
if(argc) {
l = SysStringLen(params[argc-1]);
memcpy(ptr, params[argc-1], l*sizeof(WCHAR));
ptr += l;
}
memcpy(ptr, function_endW, sizeof(function_endW));
TRACE("%s\n", debugstr_w(str));
}else {
hres = E_OUTOFMEMORY;
}
}
while(--i >= 0)
SysFreeString(params[i]);
heap_free(params);
if(FAILED(hres))
return hres;
hres = script_parse(ctx, str, NULL, &parser);
heap_free(str);
if(FAILED(hres))
return hres;
if(!parser->source || !parser->source->functions || parser->source->functions->next || parser->source->variables) {
ERR("Invalid parser result!\n");
parser_release(parser);
return E_UNEXPECTED;
}
expr = parser->source->functions->expr;
hres = create_source_function(parser, expr->parameter_list, expr->source_elements, NULL, expr->src_str,
expr->src_len, &function);
parser_release(parser);
if(FAILED(hres))
return hres;
*ret = (IDispatch*)_IDispatchEx_(function);
return S_OK;
}
static HRESULT FunctionConstr_value(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DISPPARAMS *dp,
VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
{
HRESULT hres;
TRACE("\n");
switch(flags) {
case DISPATCH_CONSTRUCT: {
IDispatch *ret;
hres = construct_function(ctx, dp, ei, &ret);
if(FAILED(hres))
return hres;
V_VT(retv) = VT_DISPATCH;
V_DISPATCH(retv) = ret;
break;
}
default:
FIXME("unimplemented flags %x\n", flags);
return E_NOTIMPL;
}
return S_OK;
}
static HRESULT FunctionProt_value(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DISPPARAMS *dp,
VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
{
FIXME("\n");
return E_NOTIMPL;
}
HRESULT init_function_constr(script_ctx_t *ctx, DispatchEx *object_prototype)
{
FunctionInstance *prot, *constr;
HRESULT hres;
static const WCHAR FunctionW[] = {'F','u','n','c','t','i','o','n',0};
hres = create_function(ctx, NULL, PROPF_CONSTR, TRUE, object_prototype, &prot);
if(FAILED(hres))
return hres;
prot->value_proc = FunctionProt_value;
prot->name = prototypeW;
hres = create_function(ctx, NULL, PROPF_CONSTR|1, TRUE, &prot->dispex, &constr);
if(SUCCEEDED(hres)) {
constr->value_proc = FunctionConstr_value;
constr->name = FunctionW;
hres = set_prototype(ctx, &constr->dispex, &prot->dispex);
if(FAILED(hres))
jsdisp_release(&constr->dispex);
}
jsdisp_release(&prot->dispex);
if(FAILED(hres))
return hres;
ctx->function_constr = &constr->dispex;
return S_OK;
}