| /* |
| * Pointer built-ins |
| */ |
| |
| #include "duk_internal.h" |
| |
| /* |
| * Constructor |
| */ |
| |
| DUK_INTERNAL duk_ret_t duk_bi_pointer_constructor(duk_context *ctx) { |
| /* XXX: this behavior is quite useless now; it would be nice to be able |
| * to create pointer values from e.g. numbers or strings. Numbers are |
| * problematic on 64-bit platforms though. Hex encoded strings? |
| */ |
| if (duk_get_top(ctx) == 0) { |
| duk_push_pointer(ctx, NULL); |
| } else { |
| duk_to_pointer(ctx, 0); |
| } |
| DUK_ASSERT(duk_is_pointer(ctx, 0)); |
| duk_set_top(ctx, 1); |
| |
| if (duk_is_constructor_call(ctx)) { |
| duk_push_object_helper(ctx, |
| DUK_HOBJECT_FLAG_EXTENSIBLE | |
| DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_POINTER), |
| DUK_BIDX_POINTER_PROTOTYPE); |
| |
| /* Pointer object internal value is immutable */ |
| duk_dup(ctx, 0); |
| duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_INT_VALUE, DUK_PROPDESC_FLAGS_NONE); |
| } |
| /* Note: unbalanced stack on purpose */ |
| |
| return 1; |
| } |
| |
| /* |
| * toString(), valueOf() |
| */ |
| |
| DUK_INTERNAL duk_ret_t duk_bi_pointer_prototype_tostring_shared(duk_context *ctx) { |
| duk_tval *tv; |
| duk_small_int_t to_string = duk_get_current_magic(ctx); |
| |
| duk_push_this(ctx); |
| tv = duk_require_tval(ctx, -1); |
| DUK_ASSERT(tv != NULL); |
| |
| if (DUK_TVAL_IS_POINTER(tv)) { |
| /* nop */ |
| } else if (DUK_TVAL_IS_OBJECT(tv)) { |
| duk_hobject *h = DUK_TVAL_GET_OBJECT(tv); |
| DUK_ASSERT(h != NULL); |
| |
| /* Must be a "pointer object", i.e. class "Pointer" */ |
| if (DUK_HOBJECT_GET_CLASS_NUMBER(h) != DUK_HOBJECT_CLASS_POINTER) { |
| goto type_error; |
| } |
| |
| duk_get_prop_stridx(ctx, -1, DUK_STRIDX_INT_VALUE); |
| } else { |
| goto type_error; |
| } |
| |
| if (to_string) { |
| duk_to_string(ctx, -1); |
| } |
| return 1; |
| |
| type_error: |
| return DUK_RET_TYPE_ERROR; |
| } |
