mirror of
https://github.com/pjh456/OxideJS.git
synced 2026-10-24 10:41:11 +08:00
550 lines
19 KiB
Rust
550 lines
19 KiB
Rust
use std::collections::HashSet;
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use std::fmt::Write;
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use oxide_kernel::shape_forge::EMPTY_SHAPE_ID;
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use oxide_types::object::{JsObject, PropAttributes};
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use oxide_types::private_key::{int_key_value, is_int_key, make_int_key};
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use oxide_types::value::JsValue;
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use crate::object::walk_own_keys;
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use oxide_runtime_api::{NativeResult, VmHost};
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/// `JSON.parse(text, reviver)`：解析 JSON 文本为 JS 值（经 serde_json）。
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/// 提供 reviver 时以后序遍历逐属性调用 reviver 重建值。
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pub fn json_parse<H: VmHost>(vm: &mut H, args: &[u8]) -> NativeResult {
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if args.len() < 2 {
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return NativeResult::Err(crate::error::create_syntax_error(vm, "JSON.parse requires 1 argument"));
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}
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let val = vm.reg(args[1]);
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if !val.is_string() {
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return NativeResult::Err(crate::error::create_syntax_error(vm, "JSON.parse: argument is not a string"));
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}
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let text = {
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// SAFETY: val 已确认是字符串值。
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unsafe { (*val.as_string_ptr()).to_owned_string() }
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};
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let parsed: serde_json::Value = match serde_json::from_str(&text) {
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Ok(v) => v,
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Err(e) => return NativeResult::Err(crate::error::create_syntax_error(vm, &format!("{}", e))),
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};
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let mut result = value_to_jsvalue(vm, &parsed);
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// reviver 遍历以 holder 包装对象为根：解析得到的根值存于空串键槽，
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// 后序遍历自该槽展开，重建完成后以槽内最终值作为返回值。
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if args.len() > 2 {
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let reviver_val = vm.reg(args[2]);
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if reviver_val.is_object() {
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let rptr = reviver_val.as_js_object_ptr();
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if !rptr.is_null() && unsafe { (*rptr).is_function() } {
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let empty_si = vm.kernel_core().perm_interner().intern("").0;
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let holder = create_wrapper(vm, result);
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let holder_ptr = holder.as_js_object_ptr();
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match walk_reviver(vm, holder_ptr, empty_si, reviver_val) {
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Ok(()) => {
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let holder_obj = unsafe { &*holder_ptr };
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let final_val = holder_obj.get_prop_at(0u32);
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result = if final_val.is_undefined() { JsValue::undefined() } else { final_val };
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}
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Err(e) => return NativeResult::Err(e),
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}
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}
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}
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}
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NativeResult::Ok(result)
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}
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fn walk_reviver<H: VmHost>(
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vm: &mut H, holder_ptr: *mut JsObject, key_si: u32, reviver: JsValue,
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) -> Result<(), JsValue> {
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let holder = unsafe { &*holder_ptr };
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let slot = vm.get_own_property_slot(holder, key_si);
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let pos = match slot {
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Some(p) => p,
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None => return Ok(()),
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};
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let mut val = holder.get_prop_at(pos);
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// 后序遍历：先递归处理子节点。
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if val.is_object() {
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let obj_ptr = val.as_js_object_ptr();
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if !obj_ptr.is_null() {
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let obj = unsafe { &*obj_ptr };
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if obj.is_array() {
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let len = obj.prop_count() as usize;
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for i in 0..len {
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let child_si = make_int_key(i as u32);
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walk_reviver(vm, obj_ptr, child_si, reviver)?;
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}
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// 子节点可能已改写父级，重新读取当前值。
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val = holder.get_prop_at(pos);
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} else {
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let keys = walk_own_keys(vm, obj);
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for (child_si, _child_pos) in keys {
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walk_reviver(vm, obj_ptr, child_si, reviver)?;
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}
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// 子节点可能已改写父级，重新读取当前值。
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val = holder.get_prop_at(pos);
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}
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}
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}
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// 对当前值调用 reviver，用返回值覆盖属性槽。
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let key_val = crate::object::key_si_to_js_value(vm, key_si);
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let holder_val = JsValue::from_js_object(holder_ptr);
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match vm.call_function_sync(reviver, holder_val, &[key_val, val]) {
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Ok(new_val) => {
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unsafe {
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(*holder_ptr).set_prop_at(pos, new_val);
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}
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Ok(())
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}
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Err(msg) => Err(crate::error::create_type_error(vm, &msg)),
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}
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}
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fn value_to_jsvalue<H: VmHost>(vm: &mut H, val: &serde_json::Value) -> JsValue {
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match val {
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serde_json::Value::Null => JsValue::null(),
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serde_json::Value::Bool(b) => JsValue::bool(*b),
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serde_json::Value::Number(n) => {
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if let Some(f) = n.as_f64() {
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JsValue::float(f)
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} else {
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JsValue::float(0.0)
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}
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}
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serde_json::Value::String(s) => vm.new_string(s),
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serde_json::Value::Array(arr) => {
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let array_proto = vm.session().builtin_world().array_proto.as_ptr() as *mut JsObject;
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let n = arr.len();
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let array_obj = vm.alloc_object(JsObject::new_array(
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EMPTY_SHAPE_ID,
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JsValue::from_js_object(array_proto),
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n,
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vm.epoch().bump(),
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));
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for (i, v) in arr.iter().enumerate() {
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let jsv = value_to_jsvalue(vm, v);
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unsafe {
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(*array_obj).set_prop_at(i, jsv);
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}
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}
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JsValue::from_js_object(array_obj)
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}
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serde_json::Value::Object(map) => {
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let object_proto = vm.session().builtin_world().object_proto.as_ptr() as *mut JsObject;
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let mut obj = JsObject::new_empty(EMPTY_SHAPE_ID, JsValue::from_js_object(object_proto));
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for (key, val) in map {
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// 键经字符串规范化：规范数字串（"0"/"5"）映射整数键，与属性访问统一。
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let si = vm.string_key_si(key);
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let jsv = value_to_jsvalue(vm, val);
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let new_shape = vm.kernel_core().shape_forge().make_shape(obj.shape_id(), si);
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obj.set_shape_id(new_shape);
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obj.ensure_hash_props().push(jsv);
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}
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let obj_ptr = vm.alloc_object(obj);
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JsValue::from_js_object(obj_ptr)
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}
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}
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}
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fn create_wrapper<H: VmHost>(vm: &mut H, value: JsValue) -> JsValue {
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let object_proto = vm.session().builtin_world().object_proto.as_ptr() as *mut JsObject;
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let empty_si = vm.kernel_core().perm_interner().intern("").0;
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let mut obj = JsObject::new_empty(EMPTY_SHAPE_ID, JsValue::from_js_object(object_proto));
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let new_shape = vm.kernel_core().shape_forge().make_shape(obj.shape_id(), empty_si);
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obj.set_shape_id(new_shape);
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obj.ensure_hash_props().push(value);
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let obj_ptr = vm.alloc_object(obj);
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JsValue::from_js_object(obj_ptr)
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}
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fn process_space(val: JsValue) -> String {
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if val.is_int() || val.is_double() {
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let n = oxide_runtime_api::to_integer_or_infinity(val);
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if n.is_nan() || n.is_infinite() || n <= 0.0 {
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return String::new();
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}
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let clamped = (n as usize).min(10);
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" ".repeat(clamped)
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} else if val.is_string() {
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let s = unsafe { (*val.as_string_ptr()).to_owned_string() };
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s.chars().take(10).collect()
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} else {
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let s = oxide_runtime_api::to_string(val);
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s.chars().take(10).collect()
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}
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}
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/// 键 si 物化为单元序列：整数键 → ASCII 数字串，字符串键 → 码表键经 `decode_key`
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/// 还原（含孤立 surrogate 单元）。序列化文本与 toJSON/replacer 键参数均用此真实串。
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fn key_si_to_units<H: VmHost>(vm: &H, si: u32) -> Vec<u16> {
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if is_int_key(si) {
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int_key_value(si).to_string().encode_utf16().collect()
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} else {
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vm.kernel_core()
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.perm_interner()
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.lookup(si)
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.map(oxide_kernel::string_forge::decode_key)
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.unwrap_or_default()
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}
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}
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fn call_to_json<H: VmHost>(vm: &mut H, obj_val: JsValue, key: &[u16]) -> Result<JsValue, JsValue> {
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if !obj_val.is_object() {
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return Ok(obj_val);
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}
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let obj_ptr = obj_val.as_js_object_ptr();
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if obj_ptr.is_null() {
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return Ok(obj_val);
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}
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let tojson_si = vm.kernel_core().perm_interner().intern("toJSON").0;
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let resolved = vm.resolve_property(unsafe { &*obj_ptr }, tojson_si);
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match resolved {
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Some(fn_val) if fn_val.is_object() => {
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let fn_ptr = fn_val.as_js_object_ptr();
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if !fn_ptr.is_null() && unsafe { (*fn_ptr).is_function() } {
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let key_val = vm.new_string_units_owned(key.to_vec());
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match vm.call_function_sync(fn_val, obj_val, &[key_val]) {
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Ok(v) => Ok(v),
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Err(msg) => Err(crate::error::create_type_error(vm, &msg)),
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}
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} else {
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Ok(obj_val)
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}
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}
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_ => Ok(obj_val),
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}
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}
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/// `JSON.stringify(value, replacer, space)`：将 JS 值序列化为 JSON 文本。
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/// 支持 replacer 函数/属性白名单、toJSON 钩子、缩进与循环引用检测。
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pub fn json_stringify<H: VmHost>(vm: &mut H, args: &[u8]) -> NativeResult {
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if args.len() < 2 {
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return NativeResult::Ok(JsValue::undefined());
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}
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let value = vm.reg(args[1]);
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if value.is_undefined() {
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return NativeResult::Ok(JsValue::undefined());
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}
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let mut replacer_fn: Option<JsValue> = None;
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let mut replacer_whitelist: Option<HashSet<String>> = None;
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if args.len() > 2 {
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let replacer_val = vm.reg(args[2]);
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if replacer_val.is_object() {
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let rptr = replacer_val.as_js_object_ptr();
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if !rptr.is_null() {
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let robj = unsafe { &*rptr };
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if robj.is_function() {
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replacer_fn = Some(replacer_val);
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} else if robj.is_array() {
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let len = robj.prop_count() as usize;
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let mut whitelist = HashSet::new();
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for i in 0..len {
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let elem = robj.get_prop_at(i);
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if !elem.is_undefined() {
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whitelist.insert(oxide_runtime_api::to_string(elem));
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}
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}
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replacer_whitelist = Some(whitelist);
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}
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}
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}
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}
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let space = if args.len() > 3 { process_space(vm.reg(args[3])) } else { String::new() };
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let holder = create_wrapper(vm, value);
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let value = match call_to_json(vm, value, &[]) {
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Ok(v) => v,
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Err(e) => return NativeResult::Err(e),
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};
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let value = if let Some(replacer) = replacer_fn {
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let key_val = vm.new_string("");
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match vm.call_function_sync(replacer, holder, &[key_val, value]) {
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Ok(v) => v,
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Err(msg) => return NativeResult::Err(crate::error::create_type_error(vm, &msg)),
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}
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} else {
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value
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};
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let mut visited = HashSet::new();
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let mut output = String::new();
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let indent_level: usize = 0;
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if jsvalue_to_json(
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vm,
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value,
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&mut visited,
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&mut output,
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replacer_fn,
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replacer_whitelist.as_ref(),
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&space,
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indent_level,
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&[],
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)
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.is_err()
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{
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return NativeResult::Err(crate::error::create_type_error(vm, "Converting circular structure to JSON"));
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};
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NativeResult::Ok(vm.new_string_owned(output))
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}
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#[allow(clippy::too_many_arguments)]
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fn jsvalue_to_json<H: VmHost>(
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vm: &mut H, val: JsValue, visited: &mut HashSet<*const JsObject>, out: &mut String, replacer_fn: Option<JsValue>,
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replacer_whitelist: Option<&HashSet<String>>, space: &str, indent_level: usize, key: &[u16],
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) -> Result<(), ()> {
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let val = call_to_json(vm, val, key).map_err(|_| ())?;
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if val.is_null() {
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out.push_str("null");
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} else if val.is_undefined() {
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} else if val.is_bool() {
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out.push_str(if val.as_bool() { "true" } else { "false" });
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} else if val.is_int() {
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write!(out, "{}", val.as_int()).unwrap();
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} else if val.is_double() {
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let n = val.as_double();
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if !n.is_finite() {
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out.push_str("null");
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} else {
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oxide_runtime_api::write_number_into(n, out);
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}
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} else if val.is_string() {
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// SAFETY: val 已确认是字符串值；单元视图按码单元流序列化（见 stringify_string_units）。
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let units = unsafe { (*val.as_string_ptr()).units() };
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stringify_string_units(&units, out);
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} else if val.is_object() {
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let obj_ptr = val.as_js_object_ptr();
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if obj_ptr.is_null() {
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out.push_str("null");
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return Ok(());
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}
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if !visited.insert(obj_ptr as *const JsObject) {
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return Err(());
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}
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let obj = unsafe { &*obj_ptr };
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if obj.is_array() {
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stringify_array(vm, obj, visited, out, replacer_fn, replacer_whitelist, space, indent_level)?;
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} else {
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stringify_object(vm, obj, visited, out, replacer_fn, replacer_whitelist, space, indent_level)?;
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}
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visited.remove(&(obj_ptr as *const JsObject));
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}
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Ok(())
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}
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/// JSON 字符串序列化（按码单元流）：代理对原样输出 astral 字符，非配对孤立
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/// surrogate 输出 \uXXXX（well-formed JSON 要求，round-trip 经 JSON.parse 复原同值），
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/// C0/C1 控制码输出 \uXXXX，其余按 JSON 转义规则。
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fn stringify_string_units(units: &[u16], out: &mut String) {
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out.push('"');
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let mut i = 0;
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while i < units.len() {
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let u = units[i];
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if (0xD800..=0xDBFF).contains(&u) && i + 1 < units.len() && (0xDC00..=0xDFFF).contains(&units[i + 1]) {
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let cp = 0x10000 + ((u32::from(u) - 0xD800) << 10) + (u32::from(units[i + 1]) - 0xDC00);
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if let Some(c) = char::from_u32(cp) {
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out.push(c);
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}
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i += 2;
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continue;
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}
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match u {
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0x22 => out.push_str("\\\""),
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0x5C => out.push_str("\\\\"),
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0x0A => out.push_str("\\n"),
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0x0D => out.push_str("\\r"),
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0x09 => out.push_str("\\t"),
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0x00..=0x1F | 0x7F..=0x9F | 0xD800..=0xDFFF => {
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let _ = write!(out, "\\u{:04x}", u);
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}
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_ => {
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if let Some(c) = char::from_u32(u32::from(u)) {
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out.push(c);
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}
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}
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}
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i += 1;
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}
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out.push('"');
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}
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#[allow(clippy::too_many_arguments)]
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fn stringify_object<H: VmHost>(
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vm: &mut H, obj: &JsObject, visited: &mut HashSet<*const JsObject>, out: &mut String, replacer_fn: Option<JsValue>,
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replacer_whitelist: Option<&HashSet<String>>, space: &str, indent_level: usize,
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) -> Result<(), ()> {
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let has_space = !space.is_empty();
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out.push('{');
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let keys = walk_own_keys(vm, obj);
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// 仅序列化可枚举自身属性（规范 EnumerableOwnPropertyNames）。
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let entries: Vec<(Vec<u16>, String, u32)> = keys
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.into_iter()
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.filter(|(_si, pos)| {
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obj.prop_meta_at(*pos)
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.map(|m| m.attributes.enumerable())
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.unwrap_or(PropAttributes::DEFAULT_DATA.enumerable())
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})
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.filter_map(|(si, pos)| {
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let units = key_si_to_units(vm, si);
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// 白名单匹配走 lossy 串形态（与白名单构造侧 to_string 同口径）。
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let name = String::from_utf16_lossy(&units);
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if let Some(whitelist) = replacer_whitelist {
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if !whitelist.contains(&name) {
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return None;
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}
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}
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Some((units, name, pos))
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})
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.collect();
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let mut first = true;
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for (units, _name, pos) in entries {
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let val = obj.get_prop_at(pos);
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// replacer 函数回调（toJSON 已在 jsvalue_to_json 中处理）。
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let val = if let Some(replacer) = replacer_fn {
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let key_val = vm.new_string_units_owned(units.clone());
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let holder = JsValue::from_js_object(obj as *const JsObject as *mut JsObject);
|
||
match vm.call_function_sync(replacer, holder, &[key_val, val]) {
|
||
Ok(v) => {
|
||
if v.is_undefined() {
|
||
continue;
|
||
}
|
||
v
|
||
}
|
||
Err(_) => return Err(()),
|
||
}
|
||
} else {
|
||
val
|
||
};
|
||
|
||
let is_function = val.is_object() && {
|
||
let ptr = val.as_js_object_ptr();
|
||
!ptr.is_null() && unsafe { (*ptr).is_function() }
|
||
};
|
||
if val.is_undefined() || is_function {
|
||
continue;
|
||
}
|
||
|
||
if !first && !has_space {
|
||
out.push(',');
|
||
} else if !first {
|
||
out.push_str(",\n");
|
||
}
|
||
first = false;
|
||
|
||
if has_space {
|
||
for _ in 0..indent_level + 1 {
|
||
out.push_str(space);
|
||
}
|
||
stringify_string_units(&units, out);
|
||
out.push(':');
|
||
out.push(' ');
|
||
} else {
|
||
stringify_string_units(&units, out);
|
||
out.push(':');
|
||
}
|
||
|
||
jsvalue_to_json(vm, val, visited, out, replacer_fn, replacer_whitelist, space, indent_level + 1, &units)?;
|
||
}
|
||
|
||
if has_space && !first {
|
||
out.push('\n');
|
||
for _ in 0..indent_level {
|
||
out.push_str(space);
|
||
}
|
||
}
|
||
out.push('}');
|
||
Ok(())
|
||
}
|
||
|
||
#[allow(clippy::too_many_arguments)]
|
||
fn stringify_array<H: VmHost>(
|
||
vm: &mut H, obj: &JsObject, visited: &mut HashSet<*const JsObject>, out: &mut String, replacer_fn: Option<JsValue>,
|
||
replacer_whitelist: Option<&HashSet<String>>, space: &str, indent_level: usize,
|
||
) -> Result<(), ()> {
|
||
let has_space = !space.is_empty();
|
||
out.push('[');
|
||
|
||
let len = obj.prop_count() as usize;
|
||
for i in 0..len {
|
||
if i > 0 && !has_space {
|
||
out.push(',');
|
||
} else if i > 0 {
|
||
out.push_str(",\n");
|
||
}
|
||
|
||
if has_space {
|
||
out.push('\n');
|
||
for _ in 0..indent_level + 1 {
|
||
out.push_str(space);
|
||
}
|
||
}
|
||
|
||
let val = obj.get_prop_at(i);
|
||
|
||
let index_str = i.to_string();
|
||
let index_units: Vec<u16> = index_str.encode_utf16().collect();
|
||
|
||
// replacer 函数回调（toJSON 已在 jsvalue_to_json 中处理）。
|
||
let val = if let Some(replacer) = replacer_fn {
|
||
let key_val = vm.new_string(&index_str);
|
||
let holder = JsValue::from_js_object(obj as *const JsObject as *mut JsObject);
|
||
match vm.call_function_sync(replacer, holder, &[key_val, val]) {
|
||
Ok(v) => {
|
||
if v.is_undefined() {
|
||
out.push_str("null");
|
||
continue;
|
||
}
|
||
v
|
||
}
|
||
Err(_) => return Err(()),
|
||
}
|
||
} else {
|
||
val
|
||
};
|
||
|
||
let is_function = val.is_object() && {
|
||
let ptr = val.as_js_object_ptr();
|
||
!ptr.is_null() && unsafe { (*ptr).is_function() }
|
||
};
|
||
if is_function || val.is_undefined() {
|
||
out.push_str("null");
|
||
} else {
|
||
jsvalue_to_json(
|
||
vm,
|
||
val,
|
||
visited,
|
||
out,
|
||
replacer_fn,
|
||
replacer_whitelist,
|
||
space,
|
||
indent_level + 1,
|
||
&index_units,
|
||
)?;
|
||
}
|
||
}
|
||
|
||
if has_space && len > 0 {
|
||
out.push('\n');
|
||
for _ in 0..indent_level {
|
||
out.push_str(space);
|
||
}
|
||
}
|
||
out.push(']');
|
||
Ok(())
|
||
}
|