static int jsR_hasproperty(js_State *J, js_Object *obj, const char *name)
{
js_Property *ref;
unsigned int k;
if (obj->type == JS_CARRAY) {
if (!strcmp(name, "length")) {
js_pushnumber(J, obj->u.a.length);
return 1;
}
}
if (obj->type == JS_CSTRING) {
if (!strcmp(name, "length")) {
js_pushnumber(J, obj->u.s.length);
return 1;
}
if (js_isarrayindex(J, name, &k)) {
js_pushrune(J, js_runeat(J, obj->u.s.string, k));
return 1;
}
}
if (obj->type == JS_CREGEXP) {
if (!strcmp(name, "source")) {
js_pushliteral(J, obj->u.r.source);
return 1;
}
if (!strcmp(name, "global")) {
js_pushboolean(J, obj->u.r.flags & JS_REGEXP_G);
return 1;
}
if (!strcmp(name, "ignoreCase")) {
js_pushboolean(J, obj->u.r.flags & JS_REGEXP_I);
return 1;
}
if (!strcmp(name, "multiline")) {
js_pushboolean(J, obj->u.r.flags & JS_REGEXP_M);
return 1;
}
if (!strcmp(name, "lastIndex")) {
js_pushnumber(J, obj->u.r.last);
return 1;
}
}
ref = jsV_getproperty(J, obj, name);
if (ref) {
if (ref->getter) {
js_pushobject(J, ref->getter);
js_pushobject(J, obj);
js_call(J, 0);
} else {
js_pushvalue(J, ref->value);
}
return 1;
}
return 0;
}
static void jsR_defproperty(js_State *J, js_Object *obj, const char *name,
int atts, js_Value *value, js_Object *getter, js_Object *setter)
{
js_Property *ref;
unsigned int k;
if (obj->type == JS_CARRAY)
if (!strcmp(name, "length"))
goto readonly;
if (obj->type == JS_CSTRING) {
if (!strcmp(name, "length"))
goto readonly;
if (js_isarrayindex(J, name, &k))
if (js_runeat(J, obj->u.s.string, k))
goto readonly;
}
if (obj->type == JS_CREGEXP) {
if (!strcmp(name, "source")) goto readonly;
if (!strcmp(name, "global")) goto readonly;
if (!strcmp(name, "ignoreCase")) goto readonly;
if (!strcmp(name, "multiline")) goto readonly;
if (!strcmp(name, "lastIndex")) goto readonly;
}
ref = jsV_setproperty(J, obj, name);
if (ref) {
if (value) {
if (!(ref->atts & JS_READONLY))
ref->value = *value;
else if (J->strict)
js_typeerror(J, "'%s' is read-only", name);
}
if (getter) {
if (!(ref->atts & JS_DONTCONF))
ref->getter = getter;
else if (J->strict)
js_typeerror(J, "'%s' is non-configurable", name);
}
if (setter) {
if (!(ref->atts & JS_DONTCONF))
ref->setter = setter;
else if (J->strict)
js_typeerror(J, "'%s' is non-configurable", name);
}
ref->atts |= atts;
}
return;
readonly:
if (J->strict)
js_typeerror(J, "'%s' is read-only or non-configurable", name);
}
static int itshadow(js_State *J, js_Object *top, js_Object *bot, const char *name)
{
int k;
while (top != bot) {
js_Property *prop = lookup(top->properties, name);
if (prop && !(prop->atts & JS_DONTENUM))
return 1;
if (top->type == JS_CSTRING)
if (js_isarrayindex(J, name, &k) && k < top->u.s.length)
return 1;
top = top->prototype;
}
return 0;
}
const char *jsV_nextiterator(js_State *J, js_Object *io)
{
int k;
if (io->type != JS_CITERATOR)
js_typeerror(J, "not an iterator");
while (io->u.iter.head) {
js_Iterator *next = io->u.iter.head->next;
const char *name = io->u.iter.head->name;
js_free(J, io->u.iter.head);
io->u.iter.head = next;
if (jsV_getproperty(J, io->u.iter.target, name))
return name;
if (io->u.iter.target->type == JS_CSTRING)
if (js_isarrayindex(J, name, &k) && k < io->u.iter.target->u.s.length)
return name;
}
return NULL;
}
static int jsR_delproperty(js_State *J, js_Object *obj, const char *name)
{
js_Property *ref;
unsigned int k;
if (obj->type == JS_CARRAY)
if (!strcmp(name, "length"))
goto dontconf;
if (obj->type == JS_CSTRING) {
if (!strcmp(name, "length"))
goto dontconf;
if (js_isarrayindex(J, name, &k))
if (js_runeat(J, obj->u.s.string, k))
goto dontconf;
}
if (obj->type == JS_CREGEXP) {
if (!strcmp(name, "source")) goto dontconf;
if (!strcmp(name, "global")) goto dontconf;
if (!strcmp(name, "ignoreCase")) goto dontconf;
if (!strcmp(name, "multiline")) goto dontconf;
if (!strcmp(name, "lastIndex")) goto dontconf;
}
ref = jsV_getownproperty(J, obj, name);
if (ref) {
if (ref->atts & JS_DONTCONF)
goto dontconf;
jsV_delproperty(J, obj, name);
}
return 1;
dontconf:
if (J->strict)
js_typeerror(J, "'%s' is non-configurable", name);
return 0;
}
static void jsR_setproperty(js_State *J, js_Object *obj, const char *name, js_Value *value)
{
js_Property *ref;
unsigned int k;
int own;
if (obj->type == JS_CARRAY) {
if (!strcmp(name, "length")) {
double rawlen = jsV_tonumber(J, value);
unsigned int newlen = jsV_numbertouint32(rawlen);
if (newlen != rawlen)
js_rangeerror(J, "array length");
jsV_resizearray(J, obj, newlen);
return;
}
if (js_isarrayindex(J, name, &k))
if (k >= obj->u.a.length)
obj->u.a.length = k + 1;
}
if (obj->type == JS_CSTRING) {
if (!strcmp(name, "length"))
goto readonly;
if (js_isarrayindex(J, name, &k))
if (js_runeat(J, obj->u.s.string, k))
goto readonly;
}
if (obj->type == JS_CREGEXP) {
if (!strcmp(name, "source")) goto readonly;
if (!strcmp(name, "global")) goto readonly;
if (!strcmp(name, "ignoreCase")) goto readonly;
if (!strcmp(name, "multiline")) goto readonly;
if (!strcmp(name, "lastIndex")) {
obj->u.r.last = jsV_tointeger(J, value);
return;
}
}
/* First try to find a setter in prototype chain */
ref = jsV_getpropertyx(J, obj, name, &own);
if (ref && ref->setter) {
js_pushobject(J, ref->setter);
js_pushobject(J, obj);
js_pushvalue(J, *value);
js_call(J, 1);
js_pop(J, 1);
return;
}
/* Property not found on this object, so create one */
if (!ref || !own)
ref = jsV_setproperty(J, obj, name);
if (ref) {
if (!(ref->atts & JS_READONLY))
ref->value = *value;
else
goto readonly;
}
return;
readonly:
if (J->strict)
js_typeerror(J, "'%s' is read-only", name);
}
