OVMS3/OVMS.V3/components/duktape/src-input/duk_bi_boolean.c

69 lines
1.8 KiB
C

/*
* Boolean built-ins
*/
#include "duk_internal.h"
#if defined(DUK_USE_BOOLEAN_BUILTIN)
/* Shared helper to provide toString() and valueOf(). Checks 'this', gets
* the primitive value to stack top, and optionally coerces with ToString().
*/
DUK_INTERNAL duk_ret_t duk_bi_boolean_prototype_tostring_shared(duk_hthread *thr) {
duk_tval *tv;
duk_hobject *h;
duk_small_int_t coerce_tostring = duk_get_current_magic(thr);
/* XXX: there is room to use a shared helper here, many built-ins
* check the 'this' type, and if it's an object, check its class,
* then get its internal value, etc.
*/
duk_push_this(thr);
tv = duk_get_tval(thr, -1);
DUK_ASSERT(tv != NULL);
if (DUK_TVAL_IS_BOOLEAN(tv)) {
goto type_ok;
} else if (DUK_TVAL_IS_OBJECT(tv)) {
h = DUK_TVAL_GET_OBJECT(tv);
DUK_ASSERT(h != NULL);
if (DUK_HOBJECT_GET_CLASS_NUMBER(h) == DUK_HOBJECT_CLASS_BOOLEAN) {
duk_xget_owndataprop_stridx_short(thr, -1, DUK_STRIDX_INT_VALUE);
DUK_ASSERT(duk_is_boolean(thr, -1));
goto type_ok;
}
}
DUK_DCERROR_TYPE_INVALID_ARGS(thr);
/* never here */
type_ok:
if (coerce_tostring) {
duk_to_string(thr, -1);
}
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_boolean_constructor(duk_hthread *thr) {
duk_hobject *h_this;
duk_to_boolean(thr, 0);
if (duk_is_constructor_call(thr)) {
/* XXX: helper; rely on Boolean.prototype as being non-writable, non-configurable */
duk_push_this(thr);
h_this = duk_known_hobject(thr, -1);
DUK_ASSERT(DUK_HOBJECT_GET_PROTOTYPE(thr->heap, h_this) == thr->builtins[DUK_BIDX_BOOLEAN_PROTOTYPE]);
DUK_HOBJECT_SET_CLASS_NUMBER(h_this, DUK_HOBJECT_CLASS_BOOLEAN);
duk_dup_0(thr); /* -> [ val obj val ] */
duk_xdef_prop_stridx_short(thr, -2, DUK_STRIDX_INT_VALUE, DUK_PROPDESC_FLAGS_NONE); /* XXX: proper flags? */
} /* unbalanced stack */
return 1;
}
#endif /* DUK_USE_BOOLEAN_BUILTIN */