Add m-esr52 at 52.6.0

1 files changed, 226 insertions, 0 deletions

diff --git a/js/src/jsarray.h b/js/src/jsarray.h
new file mode 100644
index 000000000..e22cde881
--- /dev/null
+++ b/js/src/jsarray.h
@@ -0,0 +1,226 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * vim: set ts=8 sts=4 et sw=4 tw=99:
+ * 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/. */
+
+/* JS Array interface. */
+
+#ifndef jsarray_h
+#define jsarray_h
+
+#include "jsobj.h"
+#include "jspubtd.h"
+
+#include "vm/ArrayObject.h"
+
+namespace js {
+/* 2^32-2, inclusive */
+const uint32_t MAX_ARRAY_INDEX = 4294967294u;
+
+inline bool
+IdIsIndex(jsid id, uint32_t* indexp)
+{
+    if (JSID_IS_INT(id)) {
+        int32_t i = JSID_TO_INT(id);
+        MOZ_ASSERT(i >= 0);
+        *indexp = (uint32_t)i;
+        return true;
+    }
+
+    if (MOZ_UNLIKELY(!JSID_IS_STRING(id)))
+        return false;
+
+    return js::StringIsArrayIndex(JSID_TO_ATOM(id), indexp);
+}
+
+// The methods below only create dense boxed arrays.
+
+/* Create a dense array with no capacity allocated, length set to 0. */
+extern ArrayObject * JS_FASTCALL
+NewDenseEmptyArray(JSContext* cx, HandleObject proto = nullptr,
+                   NewObjectKind newKind = GenericObject);
+
+/*
+ * Create a dense array with a set length, but without allocating space for the
+ * contents. This is useful, e.g., when accepting length from the user.
+ */
+extern ArrayObject * JS_FASTCALL
+NewDenseUnallocatedArray(ExclusiveContext* cx, uint32_t length, HandleObject proto = nullptr,
+                         NewObjectKind newKind = GenericObject);
+
+/*
+ * Create a dense array with length and capacity == |length|, initialized length set to 0,
+ * but with only |EagerAllocationMaxLength| elements allocated.
+ */
+extern ArrayObject * JS_FASTCALL
+NewDensePartlyAllocatedArray(ExclusiveContext* cx, uint32_t length, HandleObject proto = nullptr,
+                             NewObjectKind newKind = GenericObject);
+
+/* Create a dense array with length and capacity == 'length', initialized length set to 0. */
+extern ArrayObject * JS_FASTCALL
+NewDenseFullyAllocatedArray(ExclusiveContext* cx, uint32_t length, HandleObject proto = nullptr,
+                            NewObjectKind newKind = GenericObject);
+
+/* Create a dense array from the given array values, which must be rooted */
+extern ArrayObject*
+NewDenseCopiedArray(ExclusiveContext* cx, uint32_t length, const Value* values,
+                    HandleObject proto = nullptr, NewObjectKind newKind = GenericObject);
+
+/* Create a dense array based on templateObject with the given length. */
+extern ArrayObject*
+NewDenseFullyAllocatedArrayWithTemplate(JSContext* cx, uint32_t length, JSObject* templateObject);
+
+/* Create a dense array with the same copy-on-write elements as another object. */
+extern JSObject*
+NewDenseCopyOnWriteArray(JSContext* cx, HandleArrayObject templateObject, gc::InitialHeap heap);
+
+// The methods below can create either boxed or unboxed arrays.
+
+extern JSObject*
+NewFullyAllocatedArrayTryUseGroup(ExclusiveContext* cx, HandleObjectGroup group, size_t length,
+                                  NewObjectKind newKind = GenericObject);
+
+extern JSObject*
+NewPartlyAllocatedArrayTryUseGroup(ExclusiveContext* cx, HandleObjectGroup group, size_t length);
+
+extern JSObject*
+NewFullyAllocatedArrayTryReuseGroup(JSContext* cx, JSObject* obj, size_t length,
+                                    NewObjectKind newKind = GenericObject);
+
+extern JSObject*
+NewPartlyAllocatedArrayTryReuseGroup(JSContext* cx, JSObject* obj, size_t length);
+
+extern JSObject*
+NewFullyAllocatedArrayForCallingAllocationSite(JSContext* cx, size_t length,
+                                               NewObjectKind newKind = GenericObject);
+
+extern JSObject*
+NewPartlyAllocatedArrayForCallingAllocationSite(JSContext* cx, size_t length, HandleObject proto);
+
+enum class ShouldUpdateTypes
+{
+    Update,
+    DontUpdate
+};
+
+extern bool
+MaybeAnalyzeBeforeCreatingLargeArray(ExclusiveContext* cx, HandleObjectGroup group,
+                                     const Value* vp, size_t length);
+
+extern JSObject*
+NewCopiedArrayTryUseGroup(ExclusiveContext* cx, HandleObjectGroup group,
+                          const Value* vp, size_t length,
+                          NewObjectKind newKind = GenericObject,
+                          ShouldUpdateTypes updateTypes = ShouldUpdateTypes::Update);
+
+extern JSObject*
+NewCopiedArrayForCallingAllocationSite(JSContext* cx, const Value* vp, size_t length,
+                                       HandleObject proto = nullptr);
+
+extern bool
+NewValuePair(JSContext* cx, const Value& val1, const Value& val2, MutableHandleValue rval);
+
+/*
+ * Determines whether a write to the given element on |obj| should fail because
+ * |obj| is an Array with a non-writable length, and writing that element would
+ * increase the length of the array.
+ */
+extern bool
+WouldDefinePastNonwritableLength(HandleNativeObject obj, uint32_t index);
+
+/*
+ * Canonicalize |vp| to a uint32_t value potentially suitable for use as an
+ * array length.
+ */
+extern bool
+CanonicalizeArrayLengthValue(JSContext* cx, HandleValue v, uint32_t* canonicalized);
+
+extern bool
+GetLengthProperty(JSContext* cx, HandleObject obj, uint32_t* lengthp);
+
+extern bool
+SetLengthProperty(JSContext* cx, HandleObject obj, double length);
+
+extern bool
+ObjectMayHaveExtraIndexedProperties(JSObject* obj);
+
+/*
+ * Copy 'length' elements from aobj to vp.
+ *
+ * This function assumes 'length' is effectively the result of calling
+ * GetLengthProperty on aobj. vp must point to rooted memory.
+ */
+extern bool
+GetElements(JSContext* cx, HandleObject aobj, uint32_t length, js::Value* vp);
+
+/* Natives exposed for optimization by the interpreter and JITs. */
+
+extern bool
+array_sort(JSContext* cx, unsigned argc, js::Value* vp);
+
+extern bool
+array_push(JSContext* cx, unsigned argc, js::Value* vp);
+
+extern bool
+array_pop(JSContext* cx, unsigned argc, js::Value* vp);
+
+extern bool
+array_splice_impl(JSContext* cx, unsigned argc, js::Value* vp, bool pop);
+
+extern bool
+array_join(JSContext* cx, unsigned argc, js::Value* vp);
+
+extern void
+ArrayShiftMoveElements(JSObject* obj);
+
+extern bool
+array_shift(JSContext* cx, unsigned argc, js::Value* vp);
+
+extern bool
+array_unshift(JSContext* cx, unsigned argc, js::Value* vp);
+
+extern bool
+array_slice(JSContext* cx, unsigned argc, js::Value* vp);
+
+extern JSObject*
+array_slice_dense(JSContext* cx, HandleObject obj, int32_t begin, int32_t end, HandleObject result);
+
+extern bool
+array_reverse(JSContext* cx, unsigned argc, js::Value* vp);
+
+extern bool
+array_splice(JSContext* cx, unsigned argc, js::Value* vp);
+
+/*
+ * Append the given (non-hole) value to the end of an array.  The array must be
+ * a newborn array -- that is, one which has not been exposed to script for
+ * arbitrary manipulation.  (This method optimizes on the assumption that
+ * extending the array to accommodate the element will never make the array
+ * sparse, which requires that the array be completely filled.)
+ */
+extern bool
+NewbornArrayPush(JSContext* cx, HandleObject obj, const Value& v);
+
+extern JSObject*
+ArrayConstructorOneArg(JSContext* cx, HandleObjectGroup group, int32_t lengthInt);
+
+#ifdef DEBUG
+extern bool
+ArrayInfo(JSContext* cx, unsigned argc, Value* vp);
+#endif
+
+/* Array constructor native. Exposed only so the JIT can know its address. */
+extern bool
+ArrayConstructor(JSContext* cx, unsigned argc, Value* vp);
+
+// Like Array constructor, but doesn't perform GetPrototypeFromConstructor.
+extern bool
+array_construct(JSContext* cx, unsigned argc, Value* vp);
+
+extern bool
+IsWrappedArrayConstructor(JSContext* cx, const Value& v, bool* result);
+
+} /* namespace js */
+
+#endif /* jsarray_h */