jsapi.c

java script test programing source code

    {js_InitObjectClass,        EAGER_ATOM(count), NULL},
#if JS_HAS_TOSOURCE
    {js_InitObjectClass,        EAGER_ATOM(toSource), NULL},
#endif
    {js_InitObjectClass,        EAGER_ATOM(toString), NULL},
    {js_InitObjectClass,        EAGER_ATOM(toLocaleString), NULL},
    {js_InitObjectClass,        EAGER_ATOM(valueOf), NULL},
#if JS_HAS_OBJ_WATCHPOINT
    {js_InitObjectClass,        LAZY_ATOM(watch), NULL},
    {js_InitObjectClass,        LAZY_ATOM(unwatch), NULL},
#endif
    {js_InitObjectClass,        LAZY_ATOM(hasOwnProperty), NULL},
    {js_InitObjectClass,        LAZY_ATOM(isPrototypeOf), NULL},
    {js_InitObjectClass,        LAZY_ATOM(propertyIsEnumerable), NULL},
#if JS_HAS_GETTER_SETTER
    {js_InitObjectClass,        LAZY_ATOM(defineGetter), NULL},
    {js_InitObjectClass,        LAZY_ATOM(defineSetter), NULL},
    {js_InitObjectClass,        LAZY_ATOM(lookupGetter), NULL},
    {js_InitObjectClass,        LAZY_ATOM(lookupSetter), NULL},
#endif

    {NULL,                      0, NULL, NULL}
};

JS_PUBLIC_API(JSBool)
JS_ResolveStandardClass(JSContext *cx, JSObject *obj, jsval id,
                        JSBool *resolved)
{
    JSString *idstr;
    JSRuntime *rt;
    JSAtom *atom;
    JSStdName *stdnm;
    uintN i;

    CHECK_REQUEST(cx);
    *resolved = JS_FALSE;

    if (!JSVAL_IS_STRING(id))
        return JS_TRUE;
    idstr = JSVAL_TO_STRING(id);
    rt = cx->runtime;

    /* Check whether we're resolving 'undefined', and define it if so. */
    atom = rt->atomState.typeAtoms[JSTYPE_VOID];
    if (idstr == ATOM_TO_STRING(atom)) {
        *resolved = JS_TRUE;
        return OBJ_DEFINE_PROPERTY(cx, obj, ATOM_TO_JSID(atom), JSVAL_VOID,
                                   NULL, NULL, JSPROP_PERMANENT, NULL);
    }

    /* Try for class constructors/prototypes named by well-known atoms. */
    stdnm = NULL;
    for (i = 0; standard_class_atoms[i].init; i++) {
        atom = OFFSET_TO_ATOM(rt, standard_class_atoms[i].atomOffset);
        if (idstr == ATOM_TO_STRING(atom)) {
            stdnm = &standard_class_atoms[i];
            break;
        }
    }

    if (!stdnm) {
        /* Try less frequently used top-level functions and constants. */
        for (i = 0; standard_class_names[i].init; i++) {
            atom = StdNameToAtom(cx, &standard_class_names[i]);
            if (!atom)
                return JS_FALSE;
            if (idstr == ATOM_TO_STRING(atom)) {
                stdnm = &standard_class_names[i];
                break;
            }
        }

        if (!stdnm && !OBJ_GET_PROTO(cx, obj)) {
            /*
             * Try even less frequently used names delegated from the global
             * object to Object.prototype, but only if the Object class hasn't
             * yet been initialized.
             */
            for (i = 0; object_prototype_names[i].init; i++) {
                atom = StdNameToAtom(cx, &object_prototype_names[i]);
                if (!atom)
                    return JS_FALSE;
                if (idstr == ATOM_TO_STRING(atom)) {
                    stdnm = &standard_class_names[i];
                    break;
                }
            }
        }
    }

    if (stdnm) {
        /*
         * If this standard class is anonymous and obj advertises itself as a
         * global object (in order to reserve slots for standard class object
         * pointers), then we don't want to resolve by name.
         *
         * If inversely, either id does not name a class, or id does not name
         * an anonymous class, or the global does not reserve slots for class
         * objects, then we must call the init hook here.
         */
        if (stdnm->clasp &&
            (stdnm->clasp->flags & JSCLASS_IS_ANONYMOUS) &&
            (OBJ_GET_CLASS(cx, obj)->flags & JSCLASS_IS_GLOBAL)) {
            return JS_TRUE;
        }

        if (!stdnm->init(cx, obj))
            return JS_FALSE;
        *resolved = JS_TRUE;
    }
    return JS_TRUE;
}

static JSBool
AlreadyHasOwnProperty(JSContext *cx, JSObject *obj, JSAtom *atom)
{
    JSScopeProperty *sprop;
    JSScope *scope;

    JS_ASSERT(OBJ_IS_NATIVE(obj));
    JS_LOCK_OBJ(cx, obj);
    scope = OBJ_SCOPE(obj);
    sprop = SCOPE_GET_PROPERTY(scope, ATOM_TO_JSID(atom));
    JS_UNLOCK_SCOPE(cx, scope);
    return sprop != NULL;
}

JS_PUBLIC_API(JSBool)
JS_EnumerateStandardClasses(JSContext *cx, JSObject *obj)
{
    JSRuntime *rt;
    JSAtom *atom;
    uintN i;

    CHECK_REQUEST(cx);
    rt = cx->runtime;

    /* Check whether we need to bind 'undefined' and define it if so. */
    atom = rt->atomState.typeAtoms[JSTYPE_VOID];
    if (!AlreadyHasOwnProperty(cx, obj, atom) &&
        !OBJ_DEFINE_PROPERTY(cx, obj, ATOM_TO_JSID(atom), JSVAL_VOID,
                             NULL, NULL, JSPROP_PERMANENT, NULL)) {
        return JS_FALSE;
    }

    /* Initialize any classes that have not been resolved yet. */
    for (i = 0; standard_class_atoms[i].init; i++) {
        atom = OFFSET_TO_ATOM(rt, standard_class_atoms[i].atomOffset);
        if (!AlreadyHasOwnProperty(cx, obj, atom) &&
            !standard_class_atoms[i].init(cx, obj)) {
            return JS_FALSE;
        }
    }

    return JS_TRUE;
}

static JSIdArray *
AddAtomToArray(JSContext *cx, JSAtom *atom, JSIdArray *ida, jsint *ip)
{
    jsint i, length;

    i = *ip;
    length = ida->length;
    if (i >= length) {
        ida = js_SetIdArrayLength(cx, ida, JS_MAX(length * 2, 8));
        if (!ida)
            return NULL;
        JS_ASSERT(i < ida->length);
    }
    ida->vector[i] = ATOM_TO_JSID(atom);
    *ip = i + 1;
    return ida;
}

static JSIdArray *
EnumerateIfResolved(JSContext *cx, JSObject *obj, JSAtom *atom, JSIdArray *ida,
                    jsint *ip, JSBool *foundp)
{
    *foundp = AlreadyHasOwnProperty(cx, obj, atom);
    if (*foundp)
        ida = AddAtomToArray(cx, atom, ida, ip);
    return ida;
}

JS_PUBLIC_API(JSIdArray *)
JS_EnumerateResolvedStandardClasses(JSContext *cx, JSObject *obj,
                                    JSIdArray *ida)
{
    JSRuntime *rt;
    jsint i, j, k;
    JSAtom *atom;
    JSBool found;
    JSObjectOp init;

    CHECK_REQUEST(cx);
    rt = cx->runtime;
    if (ida) {
        i = ida->length;
    } else {
        ida = js_NewIdArray(cx, 8);
        if (!ida)
            return NULL;
        i = 0;
    }

    /* Check whether 'undefined' has been resolved and enumerate it if so. */
    atom = rt->atomState.typeAtoms[JSTYPE_VOID];
    ida = EnumerateIfResolved(cx, obj, atom, ida, &i, &found);
    if (!ida)
        return NULL;

    /* Enumerate only classes that *have* been resolved. */
    for (j = 0; standard_class_atoms[j].init; j++) {
        atom = OFFSET_TO_ATOM(rt, standard_class_atoms[j].atomOffset);
        ida = EnumerateIfResolved(cx, obj, atom, ida, &i, &found);
        if (!ida)
            return NULL;

        if (found) {
            init = standard_class_atoms[j].init;

            for (k = 0; standard_class_names[k].init; k++) {
                if (standard_class_names[k].init == init) {
                    atom = StdNameToAtom(cx, &standard_class_names[k]);
                    ida = AddAtomToArray(cx, atom, ida, &i);
                    if (!ida)
                        return NULL;
                }
            }

            if (init == js_InitObjectClass) {
                for (k = 0; object_prototype_names[k].init; k++) {
                    atom = StdNameToAtom(cx, &object_prototype_names[k]);
                    ida = AddAtomToArray(cx, atom, ida, &i);
                    if (!ida)
                        return NULL;
                }
            }
        }
    }

    /* Trim to exact length via js_SetIdArrayLength. */
    return js_SetIdArrayLength(cx, ida, i);
}

#undef ATOM_OFFSET
#undef CLASS_ATOM_OFFSET
#undef OFFSET_TO_ATOM
#undef CLASP

#undef EAGER_ATOM
#undef EAGER_CLASS_ATOM
#undef EAGER_ATOM_CLASP
#undef LAZY_ATOM

JS_PUBLIC_API(JSBool)
JS_GetClassObject(JSContext *cx, JSObject *obj, JSProtoKey key,
                  JSObject **objp)
{
    CHECK_REQUEST(cx);
    return js_GetClassObject(cx, obj, key, objp);
}

JS_PUBLIC_API(JSObject *)
JS_GetScopeChain(JSContext *cx)
{
    JSStackFrame *fp;

    fp = cx->fp;
    if (!fp) {
        JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_INACTIVE);
        return NULL;
    }
    return js_GetScopeChain(cx, fp);
}

JS_PUBLIC_API(void *)
JS_malloc(JSContext *cx, size_t nbytes)
{
    void *p;

    JS_ASSERT(nbytes != 0);
    if (nbytes == 0)
        nbytes = 1;

    p = malloc(nbytes);
    if (!p) {
        JS_ReportOutOfMemory(cx);
        return NULL;
    }
    js_UpdateMallocCounter(cx, nbytes);

    return p;
}

JS_PUBLIC_API(void *)
JS_realloc(JSContext *cx, void *p, size_t nbytes)
{
    p = realloc(p, nbytes);
    if (!p)
        JS_ReportOutOfMemory(cx);
    return p;
}

JS_PUBLIC_API(void)
JS_free(JSContext *cx, void *p)
{
    if (p)
        free(p);
}

JS_PUBLIC_API(char *)
JS_strdup(JSContext *cx, const char *s)
{
    size_t n;
    void *p;

    n = strlen(s) + 1;
    p = JS_malloc(cx, n);
    if (!p)
        return NULL;
    return (char *)memcpy(p, s, n);
}

JS_PUBLIC_API(jsdouble *)
JS_NewDouble(JSContext *cx, jsdouble d)
{
    CHECK_REQUEST(cx);
    return js_NewDouble(cx, d, 0);
}

JS_PUBLIC_API(JSBool)
JS_NewDoubleValue(JSContext *cx, jsdouble d, jsval *rval)
{
    CHECK_REQUEST(cx);
    return js_NewDoubleValue(cx, d, rval);
}

JS_PUBLIC_API(JSBool)
JS_NewNumberValue(JSContext *cx, jsdouble d, jsval *rval)
{
    CHECK_REQUEST(cx);
    return js_NewNumberValue(cx, d, rval);
}

#undef JS_AddRoot
JS_PUBLIC_API(JSBool)
JS_AddRoot(JSContext *cx, void *rp)
{
    CHECK_REQUEST(cx);
    return js_AddRoot(cx, rp, NULL);
}

JS_PUBLIC_API(JSBool)
JS_AddNamedRootRT(JSRuntime *rt, void *rp, const char *name)
{
    return js_AddRootRT(rt, rp, name);
}

JS_PUBLIC_API(JSBool)
JS_RemoveRoot(JSContext *cx, void *rp)
{
    CHECK_REQUEST(cx);
    return js_RemoveRoot(cx->runtime, rp);
}

JS_PUBLIC_API(JSBool)
JS_RemoveRootRT(JSRuntime *rt, void *rp)
{
    return js_RemoveRoot(rt, rp);
}

JS_PUBLIC_API(JSBool)
JS_AddNamedRoot(JSContext *cx, void *rp, const char *name)
{
    CHECK_REQUEST(cx);
    return js_AddRoot(cx, rp, name);
}

JS_PUBLIC_API(void)
JS_ClearNewbornRoots(JSContext *cx)
{
    JS_CLEAR_WEAK_ROOTS(&cx->weakRoots);
}

JS_PUBLIC_API(JSBool)
JS_EnterLocalRootScope(JSContext *cx)
{
    CHECK_REQUEST(cx);
    return js_EnterLocalRootScope(cx);
}

JS_PUBLIC_API(void)
JS_LeaveLocalRootScope(JSContext *cx)
{
    CHECK_REQUEST(cx);
    js_LeaveLocalRootScope(cx);
}

JS_PUBLIC_API(void)
JS_LeaveLocalRootScopeWithResult(JSContext *cx, jsval rval)
{
    CHECK_REQUEST(cx);
    js_LeaveLocalRootScopeWithResult(cx, rval);
}

JS_PUBLIC_API(void)
JS_ForgetLocalRoot(JSContext *cx, void *thing)
{
    CHECK_REQUEST(cx);
    js_ForgetLocalRoot(cx, (jsval) thing);
}

#ifdef DEBUG

JS_PUBLIC_API(void)
JS_DumpNamedRoots(JSRuntime *rt,
                  void (*dump)(const char *name, void *rp, void *data),
                  void *data)
{
    js_DumpNamedRoots(rt, dump, data);
}

#endif /* DEBUG */

JS_PUBLIC_API(uint32)
JS_MapGCRoots(JSRuntime *rt, JSGCRootMapFun map, void *data)
{
    return js_MapGCRoots(rt, map, data);
}

JS_PUBLIC_API(JSBool)
JS_LockGCThing(JSContext *cx, void *thing)
{
    JSBool ok;

    CHECK_REQUEST(cx);
    ok = js_LockGCThing(cx, thing);
    if (!ok)
        JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_CANT_LOCK);
    return ok;
}

JS_PUBLIC_API(JSBool)
JS_LockGCThingRT(JSRuntime *rt, void *thing)
{
    return js_LockGCThingRT(rt, thing);
}

JS_PUBLIC_API(JSBool)
JS_UnlockGCThing(JSContext *cx, void *thing)
{
    JSBool ok;

    CHECK_REQUEST(cx);
    ok = js_UnlockGCThingRT(cx->runtime, thing);
    if (!ok)
        JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_CANT_UNLOCK);
    return ok;