Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 183 insertions, 0 deletions

diff --git a/js/src/vm/JSAtom-inl.h b/js/src/vm/JSAtom-inl.h
new file mode 100644
index 0000000000..4ff4819af6
--- /dev/null
+++ b/js/src/vm/JSAtom-inl.h
@@ -0,0 +1,183 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: set ts=8 sts=2 et sw=2 tw=80:
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef vm_JSAtom_inl_h
+#define vm_JSAtom_inl_h
+
+#include "vm/JSAtom.h"
+
+#include "mozilla/FloatingPoint.h"
+#include "mozilla/RangedPtr.h"
+
+#include "jsnum.h"
+
+#include "gc/MaybeRooted.h"
+#include "vm/Runtime.h"
+#include "vm/StringType.h"
+
+namespace js {
+
+inline jsid AtomToId(JSAtom* atom) {
+  static_assert(JSID_INT_MIN == 0);
+
+  uint32_t index;
+  if (atom->isIndex(&index) && index <= JSID_INT_MAX) {
+    return INT_TO_JSID(int32_t(index));
+  }
+
+  return JS::PropertyKey::fromNonIntAtom(atom);
+}
+
+// Use the NameToId method instead!
+inline jsid AtomToId(PropertyName* name) = delete;
+
+MOZ_ALWAYS_INLINE bool ValueToIntId(const Value& v, jsid* id) {
+  int32_t i;
+  if (v.isInt32()) {
+    i = v.toInt32();
+  } else if (!v.isDouble() || !mozilla::NumberEqualsInt32(v.toDouble(), &i)) {
+    return false;
+  }
+
+  if (!INT_FITS_IN_JSID(i)) {
+    return false;
+  }
+
+  *id = INT_TO_JSID(i);
+  return true;
+}
+
+inline bool ValueToIdPure(const Value& v, jsid* id) {
+  if (v.isString()) {
+    if (v.toString()->isAtom()) {
+      *id = AtomToId(&v.toString()->asAtom());
+      return true;
+    }
+    return false;
+  }
+
+  if (ValueToIntId(v, id)) {
+    return true;
+  }
+
+  if (v.isSymbol()) {
+    *id = SYMBOL_TO_JSID(v.toSymbol());
+    return true;
+  }
+
+  return false;
+}
+
+template <AllowGC allowGC>
+inline bool PrimitiveValueToId(
+    JSContext* cx, typename MaybeRooted<Value, allowGC>::HandleType v,
+    typename MaybeRooted<jsid, allowGC>::MutableHandleType idp) {
+  // Non-primitive values should call ToPropertyKey.
+  MOZ_ASSERT(v.isPrimitive());
+
+  if (v.isString()) {
+    if (v.toString()->isAtom()) {
+      idp.set(AtomToId(&v.toString()->asAtom()));
+      return true;
+    }
+  } else {
+    if (ValueToIntId(v, idp.address())) {
+      return true;
+    }
+
+    if (v.isSymbol()) {
+      idp.set(SYMBOL_TO_JSID(v.toSymbol()));
+      return true;
+    }
+  }
+
+  JSAtom* atom = ToAtom<allowGC>(cx, v);
+  if (!atom) {
+    return false;
+  }
+
+  idp.set(AtomToId(atom));
+  return true;
+}
+
+/*
+ * Write out character representing |index| to the memory just before |end|.
+ * Thus |*end| is not touched, but |end[-1]| and earlier are modified as
+ * appropriate.  There must be at least js::UINT32_CHAR_BUFFER_LENGTH elements
+ * before |end| to avoid buffer underflow.  The start of the characters written
+ * is returned and is necessarily before |end|.
+ */
+template <typename T>
+inline mozilla::RangedPtr<T> BackfillIndexInCharBuffer(
+    uint32_t index, mozilla::RangedPtr<T> end) {
+#ifdef DEBUG
+  /*
+   * Assert that the buffer we're filling will hold as many characters as we
+   * could write out, by dereferencing the index that would hold the most
+   * significant digit.
+   */
+  (void)*(end - UINT32_CHAR_BUFFER_LENGTH);
+#endif
+
+  do {
+    uint32_t next = index / 10, digit = index % 10;
+    *--end = '0' + digit;
+    index = next;
+  } while (index > 0);
+
+  return end;
+}
+
+bool IndexToIdSlow(JSContext* cx, uint32_t index, MutableHandleId idp);
+
+inline bool IndexToId(JSContext* cx, uint32_t index, MutableHandleId idp) {
+  if (index <= JSID_INT_MAX) {
+    idp.set(INT_TO_JSID(index));
+    return true;
+  }
+
+  return IndexToIdSlow(cx, index, idp);
+}
+
+static MOZ_ALWAYS_INLINE JSLinearString* IdToString(JSContext* cx, jsid id) {
+  if (JSID_IS_STRING(id)) {
+    return JSID_TO_ATOM(id);
+  }
+
+  if (MOZ_LIKELY(JSID_IS_INT(id))) {
+    return Int32ToString<CanGC>(cx, JSID_TO_INT(id));
+  }
+
+  RootedValue idv(cx, IdToValue(id));
+  JSString* str = ToStringSlow<CanGC>(cx, idv);
+  if (!str) {
+    return nullptr;
+  }
+
+  return str->ensureLinear(cx);
+}
+
+inline Handle<PropertyName*> TypeName(JSType type, const JSAtomState& names) {
+  MOZ_ASSERT(type < JSTYPE_LIMIT);
+  static_assert(offsetof(JSAtomState, undefined) +
+                    JSTYPE_LIMIT * sizeof(ImmutablePropertyNamePtr) <=
+                sizeof(JSAtomState));
+  static_assert(JSTYPE_UNDEFINED == 0);
+  return (&names.undefined)[type];
+}
+
+inline Handle<PropertyName*> ClassName(JSProtoKey key, JSAtomState& atomState) {
+  MOZ_ASSERT(key < JSProto_LIMIT);
+  static_assert(offsetof(JSAtomState, Null) +
+                    JSProto_LIMIT * sizeof(ImmutablePropertyNamePtr) <=
+                sizeof(JSAtomState));
+  static_assert(JSProto_Null == 0);
+  return (&atomState.Null)[key];
+}
+
+}  // namespace js
+
+#endif /* vm_JSAtom_inl_h */