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wine/dlls/jscript/function.c
Gabriel Ivăncescu 2e9d086b04 jscript: Pass undefined 'this' instead of null in ES5 mode. 
Based on the spec (ECMA-262 5.1 Edition 11.2.3.7), whereas the ES3 spec
says it gets replaced with null.

Signed-off-by: Gabriel Ivăncescu <gabrielopcode@gmail.com>
Signed-off-by: Jacek Caban <jacek@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
2022-05-16 22:10:15 +02:00

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/*
* 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 <assert.h>
#include "jscript.h"
#include "engine.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(jscript);
typedef struct _function_vtbl_t function_vtbl_t;
typedef struct {
jsdisp_t dispex;
const function_vtbl_t *vtbl;
DWORD flags;
DWORD length;
} FunctionInstance;
struct _function_vtbl_t {
HRESULT (*call)(script_ctx_t*,FunctionInstance*,jsval_t,unsigned,unsigned,jsval_t*,jsval_t*);
HRESULT (*toString)(FunctionInstance*,jsstr_t**);
function_code_t* (*get_code)(FunctionInstance*);
void (*destructor)(FunctionInstance*);
};
typedef struct {
FunctionInstance function;
scope_chain_t *scope_chain;
bytecode_t *code;
function_code_t *func_code;
} InterpretedFunction;
typedef struct {
FunctionInstance function;
builtin_invoke_t proc;
const WCHAR *name;
} NativeFunction;
typedef struct {
FunctionInstance function;
FunctionInstance *target;
IDispatch *this;
unsigned argc;
jsval_t args[1];
} BindFunction;
typedef struct {
jsdisp_t jsdisp;
InterpretedFunction *function;
jsval_t *buf;
call_frame_t *frame;
unsigned argc;
} ArgumentsInstance;
static HRESULT create_bind_function(script_ctx_t*,FunctionInstance*,IDispatch*,unsigned,jsval_t*,jsdisp_t**r);
static inline FunctionInstance *function_from_jsdisp(jsdisp_t *jsdisp)
{
return CONTAINING_RECORD(jsdisp, FunctionInstance, dispex);
}
static inline FunctionInstance *function_this(jsval_t vthis)
{
jsdisp_t *jsdisp = is_object_instance(vthis) ? to_jsdisp(get_object(vthis)) : NULL;
return (jsdisp && is_class(jsdisp, JSCLASS_FUNCTION)) ? function_from_jsdisp(jsdisp) : NULL;
}
static inline ArgumentsInstance *arguments_from_jsdisp(jsdisp_t *jsdisp)
{
return CONTAINING_RECORD(jsdisp, ArgumentsInstance, jsdisp);
}
static HRESULT Arguments_value(script_ctx_t *ctx, jsval_t vthis, WORD flags, unsigned argc, jsval_t *argv,
jsval_t *r)
{
FIXME("\n");
return E_NOTIMPL;
}
static void Arguments_destructor(jsdisp_t *jsdisp)
{
ArgumentsInstance *arguments = arguments_from_jsdisp(jsdisp);
TRACE("(%p)\n", arguments);
if(arguments->buf) {
unsigned i;
for(i = 0; i < arguments->argc; i++)
jsval_release(arguments->buf[i]);
heap_free(arguments->buf);
}
jsdisp_release(&arguments->function->function.dispex);
heap_free(arguments);
}
static unsigned Arguments_idx_length(jsdisp_t *jsdisp)
{
ArgumentsInstance *arguments = arguments_from_jsdisp(jsdisp);
return arguments->argc;
}
static jsval_t *get_argument_ref(ArgumentsInstance *arguments, unsigned idx)
{
if(arguments->buf)
return arguments->buf + idx;
if(arguments->frame->base_scope->frame || idx >= arguments->frame->function->param_cnt)
return arguments->jsdisp.ctx->stack + arguments->frame->arguments_off + idx;
return NULL;
}
static HRESULT Arguments_idx_get(jsdisp_t *jsdisp, unsigned idx, jsval_t *r)
{
ArgumentsInstance *arguments = arguments_from_jsdisp(jsdisp);
jsval_t *ref;
TRACE("%p[%u]\n", arguments, idx);
if((ref = get_argument_ref(arguments, idx)))
return jsval_copy(*ref, r);
/* FIXME: Accessing by name won't work for duplicated argument names */
return jsdisp_propget_name(arguments->frame->base_scope->jsobj,
arguments->function->func_code->params[idx], r);
}
static HRESULT Arguments_idx_put(jsdisp_t *jsdisp, unsigned idx, jsval_t val)
{
ArgumentsInstance *arguments = arguments_from_jsdisp(jsdisp);
jsval_t *ref;
HRESULT hres;
TRACE("%p[%u] = %s\n", arguments, idx, debugstr_jsval(val));
if((ref = get_argument_ref(arguments, idx))) {
jsval_t copy;
hres = jsval_copy(val, &copy);
if(FAILED(hres))
return hres;
jsval_release(*ref);
*ref = copy;
return S_OK;
}
/* FIXME: Accessing by name won't work for duplicated argument names */
return jsdisp_propput_name(arguments->frame->base_scope->jsobj,
arguments->function->func_code->params[idx], val);
}
static const builtin_info_t Arguments_info = {
JSCLASS_ARGUMENTS,
Arguments_value,
0, NULL,
Arguments_destructor,
NULL,
Arguments_idx_length,
Arguments_idx_get,
Arguments_idx_put
};
HRESULT setup_arguments_object(script_ctx_t *ctx, call_frame_t *frame)
{
ArgumentsInstance *args;
HRESULT hres;
args = heap_alloc_zero(sizeof(*args));
if(!args)
return E_OUTOFMEMORY;
hres = init_dispex_from_constr(&args->jsdisp, ctx, &Arguments_info, ctx->object_constr);
if(FAILED(hres)) {
heap_free(args);
return hres;
}
args->function = (InterpretedFunction*)function_from_jsdisp(jsdisp_addref(frame->function_instance));
args->argc = frame->argc;
args->frame = frame;
hres = jsdisp_define_data_property(&args->jsdisp, L"length", PROPF_WRITABLE | PROPF_CONFIGURABLE,
jsval_number(args->argc));
if(SUCCEEDED(hres))
hres = jsdisp_define_data_property(&args->jsdisp, L"callee", PROPF_WRITABLE | PROPF_CONFIGURABLE,
jsval_obj(&args->function->function.dispex));
if(SUCCEEDED(hres))
hres = jsdisp_propput(frame->base_scope->jsobj, L"arguments", PROPF_WRITABLE, TRUE, jsval_obj(&args->jsdisp));
if(FAILED(hres)) {
jsdisp_release(&args->jsdisp);
return hres;
}
frame->arguments_obj = &args->jsdisp;
return S_OK;
}
void detach_arguments_object(jsdisp_t *args_disp)
{
ArgumentsInstance *arguments = arguments_from_jsdisp(args_disp);
call_frame_t *frame = arguments->frame;
const BOOL on_stack = frame->base_scope->frame == frame;
HRESULT hres;
/* Reset arguments value to cut the reference cycle. Note that since all activation contexts have
* their own arguments property, it's impossible to use prototype's one during name lookup */
jsdisp_propput_name(frame->base_scope->jsobj, L"arguments", jsval_undefined());
arguments->frame = NULL;
/* Don't bother coppying arguments if call frame holds the last reference. */
if(arguments->jsdisp.ref > 1) {
arguments->buf = heap_alloc(arguments->argc * sizeof(*arguments->buf));
if(arguments->buf) {
int i;
for(i = 0; i < arguments->argc ; i++) {
if(on_stack || i >= frame->function->param_cnt)
hres = jsval_copy(arguments->jsdisp.ctx->stack[frame->arguments_off + i], arguments->buf+i);
else
hres = jsdisp_propget_name(frame->base_scope->jsobj, frame->function->params[i], arguments->buf+i);
if(FAILED(hres))
arguments->buf[i] = jsval_undefined();
}
}else {
ERR("out of memory\n");
arguments->argc = 0;
}
}
jsdisp_release(frame->arguments_obj);
}
HRESULT Function_invoke(jsdisp_t *func_this, IDispatch *jsthis, WORD flags, unsigned argc, jsval_t *argv, jsval_t *r)
{
FunctionInstance *function;
jsval_t vthis;
TRACE("func %p this %p\n", func_this, jsthis);
assert(is_class(func_this, JSCLASS_FUNCTION));
function = function_from_jsdisp(func_this);
if(jsthis)
vthis = jsval_disp(jsthis);
else
vthis = function->dispex.ctx->version < SCRIPTLANGUAGEVERSION_ES5 ? jsval_null() : jsval_undefined();
return function->vtbl->call(function->dispex.ctx, function, vthis, flags, argc, argv, r);
}
static HRESULT Function_get_length(script_ctx_t *ctx, jsdisp_t *jsthis, jsval_t *r)
{
TRACE("%p\n", jsthis);
*r = jsval_number(function_from_jsdisp(jsthis)->length);
return S_OK;
}
static HRESULT Function_toString(script_ctx_t *ctx, jsval_t vthis, WORD flags, unsigned argc, jsval_t *argv,
jsval_t *r)
{
FunctionInstance *function;
jsstr_t *str;
HRESULT hres;
TRACE("\n");
if(!(function = function_this(vthis)))
return JS_E_FUNCTION_EXPECTED;
hres = function->vtbl->toString(function, &str);
if(FAILED(hres))
return hres;
if(r)
*r = jsval_string(str);
else
jsstr_release(str);
return S_OK;
}
static HRESULT array_to_args(script_ctx_t *ctx, jsdisp_t *arg_array, unsigned *argc, jsval_t **ret)
{
jsval_t *argv, val;
UINT32 length, i;
HRESULT hres;
hres = jsdisp_propget_name(arg_array, L"length", &val);
if(FAILED(hres))
return hres;
hres = to_uint32(ctx, val, &length);
jsval_release(val);
if(FAILED(hres))
return hres;
argv = heap_alloc(length * sizeof(*argv));
if(!argv)
return E_OUTOFMEMORY;
for(i=0; i<length; i++) {
hres = jsdisp_get_idx(arg_array, i, argv+i);
if(hres == DISP_E_UNKNOWNNAME) {
argv[i] = jsval_undefined();
}else if(FAILED(hres)) {
while(i--)
jsval_release(argv[i]);
heap_free(argv);
return hres;
}
}
*argc = length;
*ret = argv;
return S_OK;
}
static HRESULT Function_apply(script_ctx_t *ctx, jsval_t vthis, WORD flags, unsigned argc, jsval_t *argv, jsval_t *r)
{
jsval_t this_val = jsval_undefined();
FunctionInstance *function;
jsval_t *args = NULL;
unsigned i, cnt = 0;
HRESULT hres = S_OK;
TRACE("\n");
if(is_null_disp(vthis))
return JS_E_OBJECT_REQUIRED;
if(!is_object_instance(vthis) || (!(function = function_this(vthis)) && to_jsdisp(get_object(vthis))))
return JS_E_FUNCTION_EXPECTED;
if(argc) {
if(ctx->version < SCRIPTLANGUAGEVERSION_ES5 && !is_undefined(argv[0]) && !is_null(argv[0])) {
IDispatch *this_obj;
hres = to_object(ctx, argv[0], &this_obj);
if(FAILED(hres))
return hres;
this_val = jsval_disp(this_obj);
}else {
hres = jsval_copy(argv[0], &this_val);
if(FAILED(hres))
return hres;
}
}
if(argc >= 2) {
jsdisp_t *arg_array = NULL;
if(is_object_instance(argv[1])) {
arg_array = iface_to_jsdisp(get_object(argv[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, &cnt, &args);
jsdisp_release(arg_array);
}else {
FIXME("throw TypeError\n");
hres = E_FAIL;
}
}
if(SUCCEEDED(hres)) {
if(function) {
hres = function->vtbl->call(ctx, function, this_val, flags, cnt, args, r);
}else {
jsval_t res;
hres = disp_call_value(ctx, get_object(vthis), is_object_instance(this_val) ? get_object(this_val) : NULL,
DISPATCH_METHOD, cnt, args, &res);
if(SUCCEEDED(hres)) {
if(r)
*r = res;
else
jsval_release(res);
}
}
}
jsval_release(this_val);
for(i=0; i < cnt; i++)
jsval_release(args[i]);
heap_free(args);
return hres;
}
static HRESULT Function_call(script_ctx_t *ctx, jsval_t vthis, WORD flags, unsigned argc, jsval_t *argv,
jsval_t *r)
{
jsval_t this_val = jsval_undefined();
FunctionInstance *function;
unsigned cnt = 0;
HRESULT hres;
TRACE("\n");
if(is_null_disp(vthis))
return JS_E_OBJECT_REQUIRED;
if(!(function = function_this(vthis)))
return JS_E_FUNCTION_EXPECTED;
if(argc) {
if(ctx->version < SCRIPTLANGUAGEVERSION_ES5 && !is_undefined(argv[0]) && !is_null(argv[0])) {
IDispatch *this_obj;
hres = to_object(ctx, argv[0], &this_obj);
if(FAILED(hres))
return hres;
this_val = jsval_disp(this_obj);
}else {
hres = jsval_copy(argv[0], &this_val);
if(FAILED(hres))
return hres;
}
cnt = argc-1;
}
hres = function->vtbl->call(ctx, function, this_val, flags, cnt, argv + 1, r);
jsval_release(this_val);
return hres;
}
static HRESULT Function_bind(script_ctx_t *ctx, jsval_t vthis, WORD flags, unsigned argc, jsval_t *argv,
jsval_t *r)
{
IDispatch *bound_this = NULL;
FunctionInstance *function;
jsdisp_t *new_function;
HRESULT hres;
TRACE("\n");
if(!(function = function_this(vthis)))
return JS_E_FUNCTION_EXPECTED;
if(argc < 1) {
FIXME("no this argument\n");
return E_NOTIMPL;
}
if(is_object_instance(argv[0])) {
bound_this = get_object(argv[0]);
}else if(!is_null(argv[0])) {
FIXME("%s is not an object instance\n", debugstr_jsval(argv[0]));
return E_NOTIMPL;
}
hres = create_bind_function(ctx, function, bound_this, argc - 1, argv + 1, &new_function);
if(FAILED(hres))
return hres;
if(r)
*r = jsval_obj(new_function);
else
jsdisp_release(new_function);
return S_OK;
}
HRESULT Function_value(script_ctx_t *ctx, jsval_t vthis, WORD flags, unsigned argc, jsval_t *argv,
jsval_t *r)
{
FunctionInstance *function;
TRACE("\n");
if(!(function = function_this(vthis))) {
ERR("dispex is not a function\n");
return E_FAIL;
}
return function->vtbl->call(ctx, function, vthis, flags, argc, argv, r);
}
HRESULT Function_get_value(script_ctx_t *ctx, jsdisp_t *jsthis, jsval_t *r)
{
FunctionInstance *function = function_from_jsdisp(jsthis);
jsstr_t *str;
HRESULT hres;
TRACE("\n");
hres = function->vtbl->toString(function, &str);
if(FAILED(hres))
return hres;
*r = jsval_string(str);
return S_OK;
}
static HRESULT Function_get_arguments(script_ctx_t *ctx, jsdisp_t *jsthis, jsval_t *r)
{
FunctionInstance *function = function_from_jsdisp(jsthis);
call_frame_t *frame;
HRESULT hres;
TRACE("\n");
for(frame = ctx->call_ctx; frame; frame = frame->prev_frame) {
if(frame->function_instance == &function->dispex) {
if(!frame->arguments_obj) {
hres = setup_arguments_object(ctx, frame);
if(FAILED(hres))
return hres;
}
*r = jsval_obj(jsdisp_addref(frame->arguments_obj));
return S_OK;
}
}
*r = jsval_null();
return S_OK;
}
function_code_t *Function_get_code(jsdisp_t *jsthis)
{
FunctionInstance *function;
assert(is_class(jsthis, JSCLASS_FUNCTION));
function = function_from_jsdisp(jsthis);
return function->vtbl->get_code(function);
}
static void Function_destructor(jsdisp_t *dispex)
{
FunctionInstance *function = function_from_jsdisp(dispex);
function->vtbl->destructor(function);
heap_free(function);
}
static const builtin_prop_t Function_props[] = {
{L"apply", Function_apply, PROPF_METHOD|2},
{L"arguments", NULL, 0, Function_get_arguments},
{L"bind", Function_bind, PROPF_METHOD|PROPF_ES5|1},
{L"call", Function_call, PROPF_METHOD|1},
{L"length", NULL, 0, Function_get_length},
{L"toString", Function_toString, PROPF_METHOD}
};
static const builtin_info_t Function_info = {
JSCLASS_FUNCTION,
Function_value,
ARRAY_SIZE(Function_props),
Function_props,
Function_destructor,
NULL
};
static const builtin_prop_t FunctionInst_props[] = {
{L"arguments", NULL, 0, Function_get_arguments},
{L"length", NULL, 0, Function_get_length}
};
static const builtin_info_t FunctionInst_info = {
JSCLASS_FUNCTION,
Function_value,
ARRAY_SIZE(FunctionInst_props),
FunctionInst_props,
Function_destructor,
NULL
};
static HRESULT create_function(script_ctx_t *ctx, const builtin_info_t *builtin_info, const function_vtbl_t *vtbl, size_t size,
DWORD flags, BOOL funcprot, jsdisp_t *prototype, void **ret)
{
FunctionInstance *function;
HRESULT hres;
function = heap_alloc_zero(size);
if(!function)
return E_OUTOFMEMORY;
if(funcprot)
hres = init_dispex(&function->dispex, ctx, builtin_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, &FunctionInst_info, ctx->function_constr);
if(FAILED(hres)) {
heap_free(function);
return hres;
}
function->vtbl = vtbl;
function->flags = flags;
function->length = flags & PROPF_ARGMASK;
*ret = function;
return S_OK;
}
static HRESULT NativeFunction_call(script_ctx_t *ctx, FunctionInstance *func, jsval_t vthis, unsigned flags,
unsigned argc, jsval_t *argv, jsval_t *r)
{
NativeFunction *function = (NativeFunction*)func;
return function->proc(ctx, vthis, flags & ~DISPATCH_JSCRIPT_INTERNAL_MASK, argc, argv, r);
}
static HRESULT NativeFunction_toString(FunctionInstance *func, jsstr_t **ret)
{
NativeFunction *function = (NativeFunction*)func;
DWORD name_len;
jsstr_t *str;
WCHAR *ptr;
static const WCHAR native_prefixW[] = L"\nfunction ";
static const WCHAR native_suffixW[] = L"() {\n [native code]\n}\n";
name_len = function->name ? lstrlenW(function->name) : 0;
str = jsstr_alloc_buf(ARRAY_SIZE(native_prefixW) + ARRAY_SIZE(native_suffixW) + name_len - 2, &ptr);
if(!str)
return E_OUTOFMEMORY;
memcpy(ptr, native_prefixW, sizeof(native_prefixW));
ptr += ARRAY_SIZE(native_prefixW) - 1;
memcpy(ptr, function->name, name_len*sizeof(WCHAR));
ptr += name_len;
memcpy(ptr, native_suffixW, sizeof(native_suffixW));
*ret = str;
return S_OK;
}
static function_code_t *NativeFunction_get_code(FunctionInstance *function)
{
return NULL;
}
static void NativeFunction_destructor(FunctionInstance *function)
{
}
static const function_vtbl_t NativeFunctionVtbl = {
NativeFunction_call,
NativeFunction_toString,
NativeFunction_get_code,
NativeFunction_destructor
};
HRESULT create_builtin_function(script_ctx_t *ctx, builtin_invoke_t value_proc, const WCHAR *name,
const builtin_info_t *builtin_info, DWORD flags, jsdisp_t *prototype, jsdisp_t **ret)
{
NativeFunction *function;
HRESULT hres;
hres = create_function(ctx, builtin_info, &NativeFunctionVtbl, sizeof(NativeFunction), flags, FALSE, NULL, (void**)&function);
if(FAILED(hres))
return hres;
if(builtin_info)
hres = jsdisp_define_data_property(&function->function.dispex, L"length", 0,
jsval_number(function->function.length));
if(SUCCEEDED(hres))
hres = jsdisp_define_data_property(&function->function.dispex, L"prototype", 0, prototype ? jsval_obj(prototype) : jsval_null());
if(FAILED(hres)) {
jsdisp_release(&function->function.dispex);
return hres;
}
function->proc = value_proc;
function->name = name;
*ret = &function->function.dispex;
return S_OK;
}
static HRESULT set_constructor_prop(script_ctx_t *ctx, jsdisp_t *constr, jsdisp_t *prot)
{
return jsdisp_define_data_property(prot, L"constructor", PROPF_WRITABLE | PROPF_CONFIGURABLE,
jsval_obj(constr));
}
HRESULT create_builtin_constructor(script_ctx_t *ctx, builtin_invoke_t value_proc, const WCHAR *name,
const builtin_info_t *builtin_info, DWORD flags, jsdisp_t *prototype, jsdisp_t **ret)
{
jsdisp_t *constr;
HRESULT hres;
hres = create_builtin_function(ctx, value_proc, name, builtin_info, flags, prototype, &constr);
if(FAILED(hres))
return hres;
hres = set_constructor_prop(ctx, constr, prototype);
if(FAILED(hres)) {
jsdisp_release(constr);
return hres;
}
*ret = constr;
return S_OK;
}
static HRESULT InterpretedFunction_call(script_ctx_t *ctx, FunctionInstance *func, jsval_t vthis, unsigned flags,
unsigned argc, jsval_t *argv, jsval_t *r)
{
InterpretedFunction *function = (InterpretedFunction*)func;
IDispatch *this_obj = NULL;
DWORD exec_flags = 0;
jsdisp_t *new_obj;
HRESULT hres;
TRACE("%p\n", function);
if(ctx->state == SCRIPTSTATE_UNINITIALIZED || ctx->state == SCRIPTSTATE_CLOSED) {
WARN("Script engine state does not allow running code.\n");
return E_UNEXPECTED;
}
if(flags & DISPATCH_CONSTRUCT) {
hres = create_object(ctx, &function->function.dispex, &new_obj);
if(FAILED(hres))
return hres;
this_obj = to_disp(new_obj);
}else if(is_object_instance(vthis)) {
this_obj = get_object(vthis);
IDispatch_AddRef(this_obj);
}else if(ctx->version >= SCRIPTLANGUAGEVERSION_ES5 && !is_undefined(vthis) && !is_null(vthis)) {
hres = to_object(ctx, vthis, &this_obj);
if(FAILED(hres))
return hres;
}
if(flags & DISPATCH_JSCRIPT_CALLEREXECSSOURCE)
exec_flags |= EXEC_RETURN_TO_INTERP;
if(flags & DISPATCH_CONSTRUCT)
exec_flags |= EXEC_CONSTRUCTOR;
hres = exec_source(ctx, exec_flags, function->code, function->func_code, function->scope_chain, this_obj,
&function->function.dispex, argc, argv, r);
if(this_obj)
IDispatch_Release(this_obj);
return hres;
}
static HRESULT InterpretedFunction_toString(FunctionInstance *func, jsstr_t **ret)
{
InterpretedFunction *function = (InterpretedFunction*)func;
*ret = jsstr_alloc_len(function->func_code->source, function->func_code->source_len);
return *ret ? S_OK : E_OUTOFMEMORY;
}
static function_code_t *InterpretedFunction_get_code(FunctionInstance *func)
{
InterpretedFunction *function = (InterpretedFunction*)func;
return function->func_code;
}
static void InterpretedFunction_destructor(FunctionInstance *func)
{
InterpretedFunction *function = (InterpretedFunction*)func;
release_bytecode(function->code);
if(function->scope_chain)
scope_release(function->scope_chain);
}
static const function_vtbl_t InterpretedFunctionVtbl = {
InterpretedFunction_call,
InterpretedFunction_toString,
InterpretedFunction_get_code,
InterpretedFunction_destructor
};
HRESULT create_source_function(script_ctx_t *ctx, bytecode_t *code, function_code_t *func_code,
scope_chain_t *scope_chain, jsdisp_t **ret)
{
InterpretedFunction *function;
jsdisp_t *prototype;
HRESULT hres;
hres = create_object(ctx, NULL, &prototype);
if(FAILED(hres))
return hres;
hres = create_function(ctx, NULL, &InterpretedFunctionVtbl, sizeof(InterpretedFunction), PROPF_CONSTR,
FALSE, NULL, (void**)&function);
if(SUCCEEDED(hres)) {
hres = jsdisp_define_data_property(&function->function.dispex, L"prototype", PROPF_WRITABLE,
jsval_obj(prototype));
if(SUCCEEDED(hres))
hres = set_constructor_prop(ctx, &function->function.dispex, prototype);
if(FAILED(hres))
jsdisp_release(&function->function.dispex);
}
jsdisp_release(prototype);
if(FAILED(hres))
return hres;
if(scope_chain) {
scope_addref(scope_chain);
function->scope_chain = scope_chain;
}
bytecode_addref(code);
function->code = code;
function->func_code = func_code;
function->function.length = function->func_code->param_cnt;
*ret = &function->function.dispex;
return S_OK;
}
static HRESULT BindFunction_call(script_ctx_t *ctx, FunctionInstance *func, jsval_t vthis, unsigned flags,
unsigned argc, jsval_t *argv, jsval_t *r)
{
BindFunction *function = (BindFunction*)func;
jsval_t *call_args = NULL;
unsigned call_argc;
HRESULT hres;
TRACE("%p\n", function);
call_argc = function->argc + argc;
if(call_argc) {
call_args = heap_alloc(call_argc * sizeof(*call_args));
if(!call_args)
return E_OUTOFMEMORY;
if(function->argc)
memcpy(call_args, function->args, function->argc * sizeof(*call_args));
if(argc)
memcpy(call_args + function->argc, argv, argc * sizeof(*call_args));
}
hres = function->target->vtbl->call(ctx, function->target, function->this ? jsval_disp(function->this) : jsval_null(),
flags, call_argc, call_args, r);
heap_free(call_args);
return hres;
}
static HRESULT BindFunction_toString(FunctionInstance *function, jsstr_t **ret)
{
*ret = jsstr_alloc(L"\nfunction() {\n [native code]\n}\n");
return *ret ? S_OK : E_OUTOFMEMORY;
}
static function_code_t *BindFunction_get_code(FunctionInstance *function)
{
return NULL;
}
static void BindFunction_destructor(FunctionInstance *func)
{
BindFunction *function = (BindFunction*)func;
unsigned i;
TRACE("%p\n", function);
for(i = 0; i < function->argc; i++)
jsval_release(function->args[i]);
jsdisp_release(&function->target->dispex);
if(function->this)
IDispatch_Release(function->this);
}
static const function_vtbl_t BindFunctionVtbl = {
BindFunction_call,
BindFunction_toString,
BindFunction_get_code,
BindFunction_destructor
};
static HRESULT create_bind_function(script_ctx_t *ctx, FunctionInstance *target, IDispatch *bound_this, unsigned argc,
jsval_t *argv, jsdisp_t **ret)
{
BindFunction *function;
HRESULT hres;
hres = create_function(ctx, NULL, &BindFunctionVtbl, FIELD_OFFSET(BindFunction, args[argc]), PROPF_METHOD,
FALSE, NULL, (void**)&function);
if(FAILED(hres))
return hres;
jsdisp_addref(&target->dispex);
function->target = target;
if(bound_this)
IDispatch_AddRef(function->this = bound_this);
for(function->argc = 0; function->argc < argc; function->argc++) {
hres = jsval_copy(argv[function->argc], function->args + function->argc);
if(FAILED(hres)) {
jsdisp_release(&function->function.dispex);
return hres;
}
}
function->function.length = target->length > argc ? target->length - argc : 0;
*ret = &function->function.dispex;
return S_OK;
}
static HRESULT construct_function(script_ctx_t *ctx, unsigned argc, jsval_t *argv, IDispatch **ret)
{
WCHAR *str = NULL, *ptr;
unsigned len = 0, i = 0;
bytecode_t *code;
jsdisp_t *function;
jsstr_t **params = NULL;
int j = 0;
HRESULT hres = S_OK;
static const WCHAR function_anonymousW[] = L"function anonymous(";
static const WCHAR function_beginW[] = L") {\n";
static const WCHAR function_endW[] = L"\n}";
if(argc) {
params = heap_alloc(argc*sizeof(*params));
if(!params)
return E_OUTOFMEMORY;
if(argc > 2)
len = (argc-2)*2; /* separating commas */
for(i=0; i < argc; i++) {
hres = to_string(ctx, argv[i], params+i);
if(FAILED(hres))
break;
len += jsstr_length(params[i]);
}
}
if(SUCCEEDED(hres)) {
len += ARRAY_SIZE(function_anonymousW) + ARRAY_SIZE(function_beginW) + ARRAY_SIZE(function_endW) - 2;
str = heap_alloc(len*sizeof(WCHAR));
if(str) {
memcpy(str, function_anonymousW, sizeof(function_anonymousW));
ptr = str + ARRAY_SIZE(function_anonymousW) - 1;
if(argc > 1) {
while(1) {
ptr += jsstr_flush(params[j], ptr);
if(++j == argc-1)
break;
*ptr++ = ',';
*ptr++ = ' ';
}
}
memcpy(ptr, function_beginW, sizeof(function_beginW));
ptr += ARRAY_SIZE(function_beginW) - 1;
if(argc)
ptr += jsstr_flush(params[argc-1], ptr);
memcpy(ptr, function_endW, sizeof(function_endW));
TRACE("%s\n", debugstr_w(str));
}else {
hres = E_OUTOFMEMORY;
}
}
while(i)
jsstr_release(params[--i]);
heap_free(params);
if(FAILED(hres))
return hres;
hres = compile_script(ctx, str, 0, 0, NULL, NULL, FALSE, FALSE,
ctx->call_ctx ? ctx->call_ctx->bytecode->named_item : NULL, &code);
heap_free(str);
if(FAILED(hres))
return hres;
if(code->global_code.func_cnt != 1 || code->global_code.var_cnt != 1) {
ERR("Invalid parser result!\n");
release_bytecode(code);
return E_UNEXPECTED;
}
hres = create_source_function(ctx, code, code->global_code.funcs, NULL, &function);
release_bytecode(code);
if(FAILED(hres))
return hres;
*ret = to_disp(function);
return S_OK;
}
static HRESULT FunctionConstr_value(script_ctx_t *ctx, jsval_t vthis, WORD flags, unsigned argc, jsval_t *argv,
jsval_t *r)
{
HRESULT hres;
TRACE("\n");
switch(flags) {
case DISPATCH_METHOD:
case DISPATCH_CONSTRUCT: {
IDispatch *ret;
hres = construct_function(ctx, argc, argv, &ret);
if(FAILED(hres))
return hres;
if(r) *r = jsval_disp(ret);
else IDispatch_Release(ret);
break;
}
default:
FIXME("unimplemented flags %x\n", flags);
return E_NOTIMPL;
}
return S_OK;
}
static HRESULT FunctionProt_value(script_ctx_t *ctx, jsval_t vthis, WORD flags, unsigned argc, jsval_t *argv,
jsval_t *r)
{
FIXME("\n");
return E_NOTIMPL;
}
HRESULT init_function_constr(script_ctx_t *ctx, jsdisp_t *object_prototype)
{
NativeFunction *prot, *constr;
HRESULT hres;
hres = create_function(ctx, &Function_info, &NativeFunctionVtbl, sizeof(NativeFunction), PROPF_CONSTR,
TRUE, object_prototype, (void**)&prot);
if(FAILED(hres))
return hres;
prot->proc = FunctionProt_value;
prot->name = L"prototype";
hres = create_function(ctx, &FunctionInst_info, &NativeFunctionVtbl, sizeof(NativeFunction), PROPF_CONSTR|1,
TRUE, &prot->function.dispex, (void**)&constr);
if(SUCCEEDED(hres)) {
constr->proc = FunctionConstr_value;
constr->name = L"Function";
hres = jsdisp_define_data_property(&constr->function.dispex, L"prototype", 0, jsval_obj(&prot->function.dispex));
if(SUCCEEDED(hres))
hres = set_constructor_prop(ctx, &constr->function.dispex, &prot->function.dispex);
if(FAILED(hres))
jsdisp_release(&constr->function.dispex);
}
jsdisp_release(&prot->function.dispex);
if(FAILED(hres))
return hres;
ctx->function_constr = &constr->function.dispex;
return S_OK;
}
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