mirror of
https://github.com/pjh456/OxideJS.git
synced 2026-10-24 02:31:13 +08:00
124 lines
4.5 KiB
Rust
124 lines
4.5 KiB
Rust
use num_traits::Zero;
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use oxide_types::object::JsObject;
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use oxide_types::value::JsValue;
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use oxide_runtime_api::{NativeResult, ProtoKind, VmHost};
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/// JS `Boolean()` 构造逻辑:把参数按 ToBoolean 语义转换。
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/// 以普通函数调用时返回原始 bool;以 new 语义调用时返回 `[[BooleanData]]` 为结果的包装对象。
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pub fn boolean_constructor<H: VmHost>(vm: &mut H, args: &[u8]) -> NativeResult {
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let this_val = vm.reg(if args.is_empty() { 0 } else { args[0] });
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let bool_val = if args.len() > 1 {
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let arg = vm.reg(args[1]);
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if arg.is_undefined() || arg.is_null() {
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false
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} else if arg.is_bool() {
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arg.as_bool()
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} else if arg.is_string() {
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// SAFETY: arg 已确认是字符串值。
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!unsafe { (*arg.as_string_ptr()).is_empty() }
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} else if arg.is_object() {
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// [[IsHTMLDDA]] 宿主对象按 undefined 处理(B.3.4),falsy。
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// SAFETY: arg 已确认是对象值,借用即时消费。
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!unsafe { (*arg.as_js_object_ptr()).is_html_dda_obj() }
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} else if arg.is_int() {
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arg.as_int() != 0
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} else if arg.is_double() {
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// NaN 按规范为 falsy(isNaN 与 != 0.0 的判定顺序即 ToBoolean 语义)。
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!arg.as_double().is_nan() && arg.as_double() != 0.0
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} else if arg.is_symbol() {
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true
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} else if arg.is_bigint() {
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// SAFETY: arg 已确认是 BigInt 值,其 box 存活至 full_reset。
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!unsafe { oxide_runtime_api::bigint_data(arg) }.is_zero()
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} else {
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false
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}
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} else {
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false
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};
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let boolean_proto = vm.builtin_proto(ProtoKind::BooleanProto);
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let is_ctor = if this_val.is_object() {
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let ptr = this_val.as_js_object_ptr();
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if ptr.is_null() {
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false
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} else {
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let proto_ptr = unsafe { (*ptr).proto().as_js_object_ptr() };
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!proto_ptr.is_null() && std::ptr::eq(proto_ptr, boolean_proto)
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}
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} else {
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false
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};
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if !is_ctor {
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return NativeResult::Ok(JsValue::bool(bool_val));
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}
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let obj = unsafe { &mut *this_val.as_js_object_ptr() };
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obj.type_tag = JsObject::OBJ_TYPE_BOOLEAN_OBJ;
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obj.set_boxed_value(JsValue::bool(bool_val));
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NativeResult::Ok(this_val)
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}
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/// `Boolean.prototype.valueOf`:返回包装对象的原始 bool 值。
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/// this 为原始 bool 时直接返回;否则必须是 Boolean 包装对象,否则抛 TypeError。
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pub fn boolean_prototype_value_of<H: VmHost>(vm: &mut H, args: &[u8]) -> NativeResult {
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let this_val = vm.reg(if args.is_empty() { 0 } else { args[0] });
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if this_val.is_bool() {
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return NativeResult::Ok(this_val);
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}
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if !this_val.is_object() {
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return NativeResult::Err(crate::error::create_type_error(
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vm,
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"Boolean.prototype.valueOf called on non-Boolean object",
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));
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}
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let obj = unsafe { &*this_val.as_js_object_ptr() };
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if !obj.is_boolean_obj() {
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return NativeResult::Err(crate::error::create_type_error(
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vm,
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"Boolean.prototype.valueOf called on non-Boolean object",
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));
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}
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let val = obj.boxed_value();
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NativeResult::Ok(val)
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}
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/// `Boolean.prototype.toString`:返回 `"true"` 或 `"false"`。
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/// 支持原始 bool 与 Boolean 包装对象;其它 this 抛 TypeError。
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pub fn boolean_prototype_to_string<H: VmHost>(vm: &mut H, args: &[u8]) -> NativeResult {
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let this_val = vm.reg(if args.is_empty() { 0 } else { args[0] });
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if this_val.is_bool() {
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return if this_val.as_bool() {
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NativeResult::Ok(vm.new_string("true"))
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} else {
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NativeResult::Ok(vm.new_string("false"))
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};
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}
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if !this_val.is_object() {
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return NativeResult::Err(crate::error::create_type_error(
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vm,
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"Boolean.prototype.toString called on non-Boolean object",
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));
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}
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let obj = unsafe { &*this_val.as_js_object_ptr() };
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if !obj.is_boolean_obj() {
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return NativeResult::Err(crate::error::create_type_error(
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vm,
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"Boolean.prototype.toString called on non-Boolean object",
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));
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}
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let val = obj.boxed_value();
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let is_true = if val.is_bool() {
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val.as_bool()
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} else {
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!val.is_null() && !val.is_undefined()
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};
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if is_true {
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NativeResult::Ok(vm.new_string("true"))
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} else {
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NativeResult::Ok(vm.new_string("false"))
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}
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}
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