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#ifdef __REACTOS__#include <wine/config.h>#include <wine/port.h>#endif
#include <math.h>#include <assert.h>
#include "jscript.h"#include "engine.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(jscript);WINE_DECLARE_DEBUG_CHANNEL(heap);
const char *debugstr_jsval(const jsval_t v){ switch(jsval_type(v)) { case JSV_UNDEFINED: return "undefined"; case JSV_NULL: return "null"; case JSV_OBJECT: return wine_dbg_sprintf("obj(%p)", get_object(v)); case JSV_STRING: return wine_dbg_sprintf("str(%s)", debugstr_jsstr(get_string(v))); case JSV_NUMBER: return wine_dbg_sprintf("%lf", get_number(v)); case JSV_BOOL: return get_bool(v) ? "true" : "false"; case JSV_VARIANT: return debugstr_variant(get_variant(v)); }
assert(0); return NULL;}
BOOL is_finite(double n){ return !isnan(n) && !isinf(n);}
#define MIN_BLOCK_SIZE 128#define ARENA_FREE_FILLER 0xaa
static inline DWORD block_size(DWORD block){ return MIN_BLOCK_SIZE << block;}
void heap_pool_init(heap_pool_t *heap){ memset(heap, 0, sizeof(*heap)); list_init(&heap->custom_blocks);}
void *heap_pool_alloc(heap_pool_t *heap, DWORD size){ struct list *list; void *tmp;
if(!heap->block_cnt) { if(!heap->blocks) { heap->blocks = heap_alloc(sizeof(void*)); if(!heap->blocks) return NULL; }
tmp = heap_alloc(block_size(0)); if(!tmp) return NULL;
heap->blocks[0] = tmp; heap->block_cnt = 1; }
if(heap->offset + size <= block_size(heap->last_block)) { tmp = ((BYTE*)heap->blocks[heap->last_block])+heap->offset; heap->offset += size; return tmp; }
if(size <= block_size(heap->last_block+1)) { if(heap->last_block+1 == heap->block_cnt) { tmp = heap_realloc(heap->blocks, (heap->block_cnt+1)*sizeof(void*)); if(!tmp) return NULL;
heap->blocks = tmp; heap->blocks[heap->block_cnt] = heap_alloc(block_size(heap->block_cnt)); if(!heap->blocks[heap->block_cnt]) return NULL;
heap->block_cnt++; }
heap->last_block++; heap->offset = size; return heap->blocks[heap->last_block]; }
list = heap_alloc(size + sizeof(struct list)); if(!list) return NULL;
list_add_head(&heap->custom_blocks, list); return list+1;}
void *heap_pool_grow(heap_pool_t *heap, void *mem, DWORD size, DWORD inc){ void *ret;
if(mem == (BYTE*)heap->blocks[heap->last_block] + heap->offset-size && heap->offset+inc < block_size(heap->last_block)) { heap->offset += inc; return mem; }
ret = heap_pool_alloc(heap, size+inc); if(ret) /* FIXME: avoid copying for custom blocks */ memcpy(ret, mem, size); return ret;}
void heap_pool_clear(heap_pool_t *heap){ struct list *tmp;
if(!heap) return;
while((tmp = list_head(&heap->custom_blocks))) { list_remove(tmp); heap_free(tmp); }
if(WARN_ON(heap)) { DWORD i;
for(i=0; i < heap->block_cnt; i++) memset(heap->blocks[i], ARENA_FREE_FILLER, block_size(i)); }
heap->last_block = heap->offset = 0; heap->mark = FALSE;}
void heap_pool_free(heap_pool_t *heap){ DWORD i;
heap_pool_clear(heap);
for(i=0; i < heap->block_cnt; i++) heap_free(heap->blocks[i]); heap_free(heap->blocks);
heap_pool_init(heap);}
heap_pool_t *heap_pool_mark(heap_pool_t *heap){ if(heap->mark) return NULL;
heap->mark = TRUE; return heap;}
void jsval_release(jsval_t val){ switch(jsval_type(val)) { case JSV_OBJECT: if(get_object(val)) IDispatch_Release(get_object(val)); break; case JSV_STRING: jsstr_release(get_string(val)); break; case JSV_VARIANT: VariantClear(get_variant(val)); heap_free(get_variant(val)); break; default: break; }}
static HRESULT jsval_variant(jsval_t *val, VARIANT *var){ VARIANT *v; HRESULT hres;
__JSVAL_TYPE(*val) = JSV_VARIANT; __JSVAL_VAR(*val) = v = heap_alloc(sizeof(VARIANT)); if(!v) { *val = jsval_undefined(); return E_OUTOFMEMORY; }
V_VT(v) = VT_EMPTY; hres = VariantCopy(v, var); if(FAILED(hres)) { *val = jsval_undefined(); heap_free(v); } return hres;}
HRESULT jsval_copy(jsval_t v, jsval_t *r){ switch(jsval_type(v)) { case JSV_UNDEFINED: case JSV_NULL: case JSV_NUMBER: case JSV_BOOL: *r = v; return S_OK; case JSV_OBJECT: if(get_object(v)) IDispatch_AddRef(get_object(v)); *r = v; return S_OK; case JSV_STRING: { jsstr_addref(get_string(v)); *r = v; return S_OK; } case JSV_VARIANT: return jsval_variant(r, get_variant(v)); }
assert(0); return E_FAIL;}
HRESULT variant_to_jsval(VARIANT *var, jsval_t *r){ if(V_VT(var) == (VT_VARIANT|VT_BYREF)) var = V_VARIANTREF(var);
switch(V_VT(var)) { case VT_EMPTY: *r = jsval_undefined(); return S_OK; case VT_NULL: *r = jsval_null(); return S_OK; case VT_BOOL: *r = jsval_bool(V_BOOL(var)); return S_OK; case VT_I4: *r = jsval_number(V_I4(var)); return S_OK; case VT_R8: *r = jsval_number(V_R8(var)); return S_OK; case VT_BSTR: { jsstr_t *str;
if(V_BSTR(var)) { str = jsstr_alloc_len(V_BSTR(var), SysStringLen(V_BSTR(var))); if(!str) return E_OUTOFMEMORY; }else { str = jsstr_null_bstr(); }
*r = jsval_string(str); return S_OK; } case VT_DISPATCH: { if(V_DISPATCH(var)) IDispatch_AddRef(V_DISPATCH(var)); *r = jsval_disp(V_DISPATCH(var)); return S_OK; } case VT_I1: *r = jsval_number(V_I1(var)); return S_OK; case VT_UI1: *r = jsval_number(V_UI1(var)); return S_OK; case VT_I2: *r = jsval_number(V_I2(var)); return S_OK; case VT_UI2: *r = jsval_number(V_UI2(var)); return S_OK; case VT_INT: *r = jsval_number(V_INT(var)); return S_OK; case VT_UI4: *r = jsval_number(V_UI4(var)); return S_OK; case VT_UI8: /* * Native doesn't support VT_UI8 here, but it's needed for IE9+ APIs * (native IE9 doesn't use jscript.dll for JavaScript). */ *r = jsval_number(V_UI8(var)); return S_OK; case VT_R4: *r = jsval_number(V_R4(var)); return S_OK; case VT_UNKNOWN: if(V_UNKNOWN(var)) { IDispatch *disp; HRESULT hres;
hres = IUnknown_QueryInterface(V_UNKNOWN(var), &IID_IDispatch, (void**)&disp); if(SUCCEEDED(hres)) { *r = jsval_disp(disp); return S_OK; } }else { *r = jsval_disp(NULL); return S_OK; } /* fall through */ default: return jsval_variant(r, var); }}
HRESULT jsval_to_variant(jsval_t val, VARIANT *retv){ switch(jsval_type(val)) { case JSV_UNDEFINED: V_VT(retv) = VT_EMPTY; return S_OK; case JSV_NULL: V_VT(retv) = VT_NULL; return S_OK; case JSV_OBJECT: V_VT(retv) = VT_DISPATCH; if(get_object(val)) IDispatch_AddRef(get_object(val)); V_DISPATCH(retv) = get_object(val); return S_OK; case JSV_STRING: { jsstr_t *str = get_string(val);
V_VT(retv) = VT_BSTR; if(is_null_bstr(str)) { V_BSTR(retv) = NULL; }else { V_BSTR(retv) = SysAllocStringLen(NULL, jsstr_length(str)); if(V_BSTR(retv)) jsstr_flush(str, V_BSTR(retv)); else return E_OUTOFMEMORY; } return S_OK; } case JSV_NUMBER: { double n = get_number(val);
if(is_int32(n)) { V_VT(retv) = VT_I4; V_I4(retv) = n; }else { V_VT(retv) = VT_R8; V_R8(retv) = n; }
return S_OK; } case JSV_BOOL: V_VT(retv) = VT_BOOL; V_BOOL(retv) = get_bool(val) ? VARIANT_TRUE : VARIANT_FALSE; return S_OK; case JSV_VARIANT: V_VT(retv) = VT_EMPTY; return VariantCopy(retv, get_variant(val)); }
assert(0); return E_FAIL;}
/* ECMA-262 3rd Edition 9.1 */HRESULT to_primitive(script_ctx_t *ctx, jsval_t val, jsval_t *ret, hint_t hint){ if(is_object_instance(val)) { jsdisp_t *jsdisp; jsval_t prim; DISPID id; HRESULT hres;
static const WCHAR toStringW[] = {'t','o','S','t','r','i','n','g',0}; static const WCHAR valueOfW[] = {'v','a','l','u','e','O','f',0};
if(!get_object(val)) { *ret = jsval_null(); return S_OK; }
jsdisp = iface_to_jsdisp(get_object(val)); if(!jsdisp) return disp_propget(ctx, get_object(val), DISPID_VALUE, ret);
if(hint == NO_HINT) hint = is_class(jsdisp, JSCLASS_DATE) ? HINT_STRING : HINT_NUMBER;
/* Native implementation doesn't throw TypeErrors, returns strange values */
hres = jsdisp_get_id(jsdisp, hint == HINT_STRING ? toStringW : valueOfW, 0, &id); if(SUCCEEDED(hres)) { hres = jsdisp_call(jsdisp, id, DISPATCH_METHOD, 0, NULL, &prim); if(FAILED(hres)) { WARN("call error - forwarding exception\n"); jsdisp_release(jsdisp); return hres; }else if(!is_object_instance(prim)) { jsdisp_release(jsdisp); *ret = prim; return S_OK; }else { IDispatch_Release(get_object(prim)); } }
hres = jsdisp_get_id(jsdisp, hint == HINT_STRING ? valueOfW : toStringW, 0, &id); if(SUCCEEDED(hres)) { hres = jsdisp_call(jsdisp, id, DISPATCH_METHOD, 0, NULL, &prim); if(FAILED(hres)) { WARN("call error - forwarding exception\n"); jsdisp_release(jsdisp); return hres; }else if(!is_object_instance(prim)) { jsdisp_release(jsdisp); *ret = prim; return S_OK; }else { IDispatch_Release(get_object(prim)); } }
jsdisp_release(jsdisp);
WARN("failed\n"); return throw_type_error(ctx, JS_E_TO_PRIMITIVE, NULL); }
return jsval_copy(val, ret);
}
/* ECMA-262 3rd Edition 9.2 */HRESULT to_boolean(jsval_t val, BOOL *ret){ switch(jsval_type(val)) { case JSV_UNDEFINED: case JSV_NULL: *ret = FALSE; return S_OK; case JSV_OBJECT: *ret = get_object(val) != NULL; return S_OK; case JSV_STRING: *ret = jsstr_length(get_string(val)) != 0; return S_OK; case JSV_NUMBER: *ret = !isnan(get_number(val)) && get_number(val); return S_OK; case JSV_BOOL: *ret = get_bool(val); return S_OK; case JSV_VARIANT: FIXME("unimplemented for variant %s\n", debugstr_variant(get_variant(val))); return E_NOTIMPL; }
assert(0); return E_FAIL;}
static int hex_to_int(WCHAR c){ if('0' <= c && c <= '9') return c-'0';
if('a' <= c && c <= 'f') return c-'a'+10;
if('A' <= c && c <= 'F') return c-'A'+10;
return -1;}
/* ECMA-262 3rd Edition 9.3.1 */static HRESULT str_to_number(jsstr_t *str, double *ret){ const WCHAR *ptr; BOOL neg = FALSE; DOUBLE d = 0.0;
static const WCHAR infinityW[] = {'I','n','f','i','n','i','t','y'};
ptr = jsstr_flatten(str); if(!ptr) return E_OUTOFMEMORY;
while(iswspace(*ptr)) ptr++;
if(*ptr == '-') { neg = TRUE; ptr++; }else if(*ptr == '+') { ptr++; }
if(!wcsncmp(ptr, infinityW, ARRAY_SIZE(infinityW))) { ptr += ARRAY_SIZE(infinityW); while(*ptr && iswspace(*ptr)) ptr++;
if(*ptr) *ret = NAN; else *ret = neg ? -INFINITY : INFINITY; return S_OK; }
if(*ptr == '0' && ptr[1] == 'x') { DWORD l = 0;
ptr += 2; while((l = hex_to_int(*ptr)) != -1) { d = d*16 + l; ptr++; }
*ret = d; return S_OK; }
while(iswdigit(*ptr)) d = d*10 + (*ptr++ - '0');
if(*ptr == 'e' || *ptr == 'E') { BOOL eneg = FALSE; LONG l = 0;
ptr++; if(*ptr == '-') { ptr++; eneg = TRUE; }else if(*ptr == '+') { ptr++; }
while(iswdigit(*ptr)) l = l*10 + (*ptr++ - '0'); if(eneg) l = -l;
d *= pow(10, l); }else if(*ptr == '.') { DOUBLE dec = 0.1;
ptr++; while(iswdigit(*ptr)) { d += dec * (*ptr++ - '0'); dec *= 0.1; } }
while(iswspace(*ptr)) ptr++;
if(*ptr) { *ret = NAN; return S_OK; }
if(neg) d = -d;
*ret = d; return S_OK;}
/* ECMA-262 3rd Edition 9.3 */HRESULT to_number(script_ctx_t *ctx, jsval_t val, double *ret){ switch(jsval_type(val)) { case JSV_UNDEFINED: *ret = NAN; return S_OK; case JSV_NULL: *ret = 0; return S_OK; case JSV_NUMBER: *ret = get_number(val); return S_OK; case JSV_STRING: return str_to_number(get_string(val), ret); case JSV_OBJECT: { jsval_t prim; HRESULT hres;
hres = to_primitive(ctx, val, &prim, HINT_NUMBER); if(FAILED(hres)) return hres;
hres = to_number(ctx, prim, ret); jsval_release(prim); return hres; } case JSV_BOOL: *ret = get_bool(val) ? 1 : 0; return S_OK; case JSV_VARIANT: FIXME("unimplemented for variant %s\n", debugstr_variant(get_variant(val))); return E_NOTIMPL; };
assert(0); return E_FAIL;}
/* ECMA-262 3rd Edition 9.4 */HRESULT to_integer(script_ctx_t *ctx, jsval_t v, double *ret){ double n; HRESULT hres;
hres = to_number(ctx, v, &n); if(FAILED(hres)) return hres;
if(isnan(n)) *ret = 0; else *ret = n >= 0.0 ? floor(n) : -floor(-n); return S_OK;}
/* ECMA-262 3rd Edition 9.5 */HRESULT to_int32(script_ctx_t *ctx, jsval_t v, INT *ret){ double n; HRESULT hres;
const double p32 = (double)0xffffffff + 1;
hres = to_number(ctx, v, &n); if(FAILED(hres)) return hres;
if(is_finite(n)) n = n > 0 ? fmod(n, p32) : -fmod(-n, p32); else n = 0;
*ret = (UINT32)n; return S_OK;}
/* ECMA-262 3rd Edition 9.6 */HRESULT to_uint32(script_ctx_t *ctx, jsval_t val, UINT32 *ret){ INT32 n; HRESULT hres;
hres = to_int32(ctx, val, &n); if(SUCCEEDED(hres)) *ret = n; return hres;}
static jsstr_t *int_to_string(int i){ WCHAR buf[12], *p; BOOL neg = FALSE;
if(!i) { static const WCHAR zeroW[] = {'0',0}; return jsstr_alloc(zeroW); }
if(i < 0) { neg = TRUE; i = -i; }
p = buf + ARRAY_SIZE(buf)-1; *p-- = 0; while(i) { *p-- = i%10 + '0'; i /= 10; }
if(neg) *p = '-'; else p++;
return jsstr_alloc(p);}
HRESULT double_to_string(double n, jsstr_t **str){ static const WCHAR InfinityW[] = {'-','I','n','f','i','n','i','t','y',0};
if(isnan(n)) { *str = jsstr_nan(); }else if(isinf(n)) { *str = jsstr_alloc(n<0 ? InfinityW : InfinityW+1); }else if(is_int32(n)) { *str = int_to_string(n); }else { VARIANT strv, v; HRESULT hres;
/* FIXME: Don't use VariantChangeTypeEx */ V_VT(&v) = VT_R8; V_R8(&v) = n; V_VT(&strv) = VT_EMPTY; hres = VariantChangeTypeEx(&strv, &v, MAKELCID(MAKELANGID(LANG_ENGLISH,SUBLANG_ENGLISH_US),SORT_DEFAULT), 0, VT_BSTR); if(FAILED(hres)) return hres;
*str = jsstr_alloc(V_BSTR(&strv)); SysFreeString(V_BSTR(&strv)); }
return *str ? S_OK : E_OUTOFMEMORY;}
/* ECMA-262 3rd Edition 9.8 */HRESULT to_string(script_ctx_t *ctx, jsval_t val, jsstr_t **str){ static const WCHAR nullW[] = {'n','u','l','l',0}; static const WCHAR trueW[] = {'t','r','u','e',0}; static const WCHAR falseW[] = {'f','a','l','s','e',0};
switch(jsval_type(val)) { case JSV_UNDEFINED: *str = jsstr_undefined(); return S_OK; case JSV_NULL: *str = jsstr_alloc(nullW); break; case JSV_NUMBER: return double_to_string(get_number(val), str); case JSV_STRING: *str = jsstr_addref(get_string(val)); break; case JSV_OBJECT: { jsval_t prim; HRESULT hres;
hres = to_primitive(ctx, val, &prim, HINT_STRING); if(FAILED(hres)) return hres;
hres = to_string(ctx, prim, str); jsval_release(prim); return hres; } case JSV_BOOL: *str = jsstr_alloc(get_bool(val) ? trueW : falseW); break; default: FIXME("unsupported %s\n", debugstr_jsval(val)); return E_NOTIMPL; }
return *str ? S_OK : E_OUTOFMEMORY;}
HRESULT to_flat_string(script_ctx_t *ctx, jsval_t val, jsstr_t **str, const WCHAR **ret_str){ HRESULT hres;
hres = to_string(ctx, val, str); if(FAILED(hres)) return hres;
*ret_str = jsstr_flatten(*str); if(!*ret_str) { jsstr_release(*str); return E_OUTOFMEMORY; }
return S_OK;}
/* ECMA-262 3rd Edition 9.9 */HRESULT to_object(script_ctx_t *ctx, jsval_t val, IDispatch **disp){ jsdisp_t *dispex; HRESULT hres;
switch(jsval_type(val)) { case JSV_STRING: hres = create_string(ctx, get_string(val), &dispex); if(FAILED(hres)) return hres;
*disp = to_disp(dispex); break; case JSV_NUMBER: hres = create_number(ctx, get_number(val), &dispex); if(FAILED(hres)) return hres;
*disp = to_disp(dispex); break; case JSV_OBJECT: if(get_object(val)) { *disp = get_object(val); IDispatch_AddRef(*disp); }else { jsdisp_t *obj;
hres = create_object(ctx, NULL, &obj); if(FAILED(hres)) return hres;
*disp = to_disp(obj); } break; case JSV_BOOL: hres = create_bool(ctx, get_bool(val), &dispex); if(FAILED(hres)) return hres;
*disp = to_disp(dispex); break; case JSV_UNDEFINED: case JSV_NULL: WARN("object expected\n"); return throw_type_error(ctx, JS_E_OBJECT_EXPECTED, NULL); case JSV_VARIANT: switch(V_VT(get_variant(val))) { case VT_ARRAY|VT_VARIANT: hres = create_vbarray(ctx, V_ARRAY(get_variant(val)), &dispex); if(FAILED(hres)) return hres;
*disp = to_disp(dispex); break;
default: FIXME("Unsupported %s\n", debugstr_variant(get_variant(val))); return E_NOTIMPL; } break; }
return S_OK;}
HRESULT variant_change_type(script_ctx_t *ctx, VARIANT *dst, VARIANT *src, VARTYPE vt){ jsval_t val; HRESULT hres;
clear_ei(ctx); hres = variant_to_jsval(src, &val); if(FAILED(hres)) return hres;
switch(vt) { case VT_I2: case VT_I4: { INT i;
hres = to_int32(ctx, val, &i); if(SUCCEEDED(hres)) { if(vt == VT_I4) V_I4(dst) = i; else V_I2(dst) = i; } break; } case VT_UI2: { UINT32 i;
hres = to_uint32(ctx, val, &i); if(SUCCEEDED(hres)) V_UI2(dst) = i; break; } case VT_R8: { double n; hres = to_number(ctx, val, &n); if(SUCCEEDED(hres)) V_R8(dst) = n; break; } case VT_R4: { double n;
hres = to_number(ctx, val, &n); if(SUCCEEDED(hres)) V_R4(dst) = n; break; } case VT_BOOL: { BOOL b;
hres = to_boolean(val, &b); if(SUCCEEDED(hres)) V_BOOL(dst) = b ? VARIANT_TRUE : VARIANT_FALSE; break; } case VT_BSTR: { jsstr_t *str;
hres = to_string(ctx, val, &str); if(FAILED(hres)) break;
if(is_null_bstr(str)) { V_BSTR(dst) = NULL; break; }
V_BSTR(dst) = SysAllocStringLen(NULL, jsstr_length(str)); if(V_BSTR(dst)) jsstr_flush(str, V_BSTR(dst)); else hres = E_OUTOFMEMORY; break; } case VT_EMPTY: hres = V_VT(src) == VT_EMPTY ? S_OK : E_NOTIMPL; break; case VT_NULL: hres = V_VT(src) == VT_NULL ? S_OK : E_NOTIMPL; break; default: FIXME("vt %d not implemented\n", vt); hres = E_NOTIMPL; }
jsval_release(val); if(FAILED(hres)) return hres;
V_VT(dst) = vt; return S_OK;}
static inline JSCaller *impl_from_IServiceProvider(IServiceProvider *iface){ return CONTAINING_RECORD(iface, JSCaller, IServiceProvider_iface);}
static HRESULT WINAPI JSCaller_QueryInterface(IServiceProvider *iface, REFIID riid, void **ppv){ JSCaller *This = impl_from_IServiceProvider(iface);
if(IsEqualGUID(&IID_IUnknown, riid)) { TRACE("(%p)->(IID_IUnknown %p)\n", This, ppv); *ppv = &This->IServiceProvider_iface; }else if(IsEqualGUID(&IID_IServiceProvider, riid)) { TRACE("(%p)->(IID_IServiceProvider %p)\n", This, ppv); *ppv = &This->IServiceProvider_iface; }else { WARN("(%p)->(%s %p)\n", This, debugstr_guid(riid), ppv); *ppv = NULL; return E_NOINTERFACE; }
IUnknown_AddRef((IUnknown*)*ppv); return S_OK;}
static ULONG WINAPI JSCaller_AddRef(IServiceProvider *iface){ JSCaller *This = impl_from_IServiceProvider(iface); LONG ref = InterlockedIncrement(&This->ref);
TRACE("(%p) ref=%d\n", This, ref);
return ref;}
static ULONG WINAPI JSCaller_Release(IServiceProvider *iface){ JSCaller *This = impl_from_IServiceProvider(iface); LONG ref = InterlockedIncrement(&This->ref);
TRACE("(%p) ref=%d\n", This, ref);
if(!ref) { assert(!This->ctx); heap_free(This); }
return ref;}
static HRESULT WINAPI JSCaller_QueryService(IServiceProvider *iface, REFGUID guidService, REFIID riid, void **ppv){ JSCaller *This = impl_from_IServiceProvider(iface);
if(IsEqualGUID(guidService, &SID_VariantConversion) && This->ctx && This->ctx->active_script) { TRACE("(%p)->(SID_VariantConversion)\n", This); return IActiveScript_QueryInterface(This->ctx->active_script, riid, ppv); }
FIXME("(%p)->(%s %s %p)\n", This, debugstr_guid(guidService), debugstr_guid(riid), ppv);
*ppv = NULL; return E_NOINTERFACE;}
static const IServiceProviderVtbl ServiceProviderVtbl = { JSCaller_QueryInterface, JSCaller_AddRef, JSCaller_Release, JSCaller_QueryService};
HRESULT create_jscaller(script_ctx_t *ctx){ JSCaller *ret;
ret = heap_alloc(sizeof(*ret)); if(!ret) return E_OUTOFMEMORY;
ret->IServiceProvider_iface.lpVtbl = &ServiceProviderVtbl; ret->ref = 1; ret->ctx = ctx;
ctx->jscaller = ret; return S_OK;}