1 files changed, 154 insertions, 0 deletions
diff --git a/src/bun.js/bindings/JSReadableState.h b/src/bun.js/bindings/JSReadableState.h
new file mode 100644
index 000000000..c67baebad
--- /dev/null
+++ b/src/bun.js/bindings/JSReadableState.h
@@ -0,0 +1,154 @@
+#pragma once
+
+#include "root.h"
+#include "BufferEncodingType.h"
+
+namespace WebCore {
+using namespace JSC;
+
+class JSReadableState : public JSC::JSDestructibleObject {
+    using Base = JSC::JSDestructibleObject;
+
+public:
+    JSReadableState(JSC::VM& vm, JSC::Structure* structure)
+        : Base(vm, structure)
+        , m_paused(0)
+    {
+    }
+
+    DECLARE_VISIT_CHILDREN;
+    DECLARE_INFO;
+
+    static constexpr unsigned StructureFlags = Base::StructureFlags;
+
+    template<typename, JSC::SubspaceAccess mode> static JSC::GCClient::IsoSubspace* subspaceFor(JSC::VM& vm)
+    {
+        if constexpr (mode == JSC::SubspaceAccess::Concurrently)
+            return nullptr;
+        return subspaceForImpl(vm);
+    }
+
+    static JSC::GCClient::IsoSubspace* subspaceForImpl(JSC::VM& vm);
+
+    static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject,
+        JSC::JSValue prototype)
+    {
+        return JSC::Structure::create(vm, globalObject, prototype,
+            JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+    }
+
+    static JSReadableState* create(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::Structure* structure, bool isDuplex, JSObject* options)
+    {
+        JSReadableState* accessor = new (NotNull, JSC::allocateCell<JSReadableState>(vm)) JSReadableState(vm, structure);
+        accessor->finishCreation(vm, globalObject, isDuplex, options);
+        return accessor;
+    }
+
+    void finishCreation(JSC::VM& vm, JSC::JSGlobalObject* globalObject, bool isDuplex, JSObject* options);
+    static void destroy(JSCell*) {}
+
+    enum Mask : uint32_t {
+        objectMode = 1 << 0,
+        emitClose = 1 << 1,
+        autoDestroy = 1 << 2,
+        ended = 1 << 3,
+        endEmitted = 1 << 4,
+        reading = 1 << 5,
+        constructed = 1 << 6,
+        sync = 1 << 7,
+        needReadable = 1 << 8,
+        emittedReadable = 1 << 9,
+        readableListening = 1 << 10,
+        resumeScheduled = 1 << 11,
+        errorEmitted = 1 << 12,
+        destroyed = 1 << 13,
+        closed = 1 << 14,
+        closeEmitted = 1 << 15,
+        multiAwaitDrain = 1 << 16,
+        readingMore = 1 << 17,
+        dataEmitted = 1 << 18,
+    };
+
+    constexpr bool getBool(Mask mask) { return m_bools.contains(mask); }
+    constexpr void setBool(Mask mask, bool val)
+    {
+        m_bools.set(mask, val);
+    }
+
+    // 0 for null, 1 for true, -1 for false
+    int8_t m_paused = 0;
+    int8_t m_flowing = 0;
+
+    WTF::OptionSet<Mask> m_bools;
+
+    int64_t m_length = 0;
+    int64_t m_highWaterMark;
+
+    mutable WriteBarrier<Unknown> m_buffer;
+    mutable WriteBarrier<Unknown> m_pipes;
+    mutable WriteBarrier<Unknown> m_errored;
+    mutable WriteBarrier<Unknown> m_defaultEncoding;
+    mutable WriteBarrier<Unknown> m_awaitDrainWriters;
+    mutable WriteBarrier<Unknown> m_decoder;
+    mutable WriteBarrier<Unknown> m_encoding;
+};
+
+class JSReadableStatePrototype : public JSC::JSNonFinalObject {
+public:
+    using Base = JSC::JSNonFinalObject;
+    static JSReadableStatePrototype* create(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::Structure* structure)
+    {
+        JSReadableStatePrototype* ptr = new (NotNull, JSC::allocateCell<JSReadableStatePrototype>(vm)) JSReadableStatePrototype(vm, structure);
+        ptr->finishCreation(vm, globalObject);
+        return ptr;
+    }
+
+    DECLARE_INFO;
+    template<typename CellType, JSC::SubspaceAccess>
+    static JSC::GCClient::IsoSubspace* subspaceFor(JSC::VM& vm)
+    {
+        return &vm.plainObjectSpace();
+    }
+    static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
+    {
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+    }
+
+private:
+    JSReadableStatePrototype(JSC::VM& vm, JSC::Structure* structure)
+        : Base(vm, structure)
+    {
+    }
+
+    void finishCreation(JSC::VM&, JSC::JSGlobalObject*);
+};
+
+class JSReadableStateConstructor final : public JSC::InternalFunction {
+public:
+    using Base = JSC::InternalFunction;
+    static JSReadableStateConstructor* create(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::Structure* structure, JSReadableStatePrototype* prototype);
+
+    static constexpr unsigned StructureFlags = Base::StructureFlags;
+    static constexpr bool needsDestruction = false;
+
+    static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
+    {
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::InternalFunctionType, StructureFlags), info());
+    }
+
+    void initializeProperties(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSReadableStatePrototype* prototype);
+
+    // Must be defined for each specialization class.
+    static JSC::EncodedJSValue JSC_HOST_CALL_ATTRIBUTES construct(JSC::JSGlobalObject*, JSC::CallFrame*);
+    DECLARE_EXPORT_INFO;
+
+private:
+    JSReadableStateConstructor(JSC::VM& vm, JSC::Structure* structure, JSC::NativeFunction nativeFunction)
+        : Base(vm, structure, nativeFunction, nativeFunction)
+    {
+    }
+
+    void finishCreation(JSC::VM&, JSC::JSGlobalObject* globalObject, JSReadableStatePrototype* prototype);
+};
+
+}