зеркало из https://github.com/mozilla/gecko-dev.git
31 строка
1.3 KiB
C++
31 строка
1.3 KiB
C++
/* -*- 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/. */
|
|
|
|
#include <string.h>
|
|
#include "nsTArray.h"
|
|
#include "nsXPCOM.h"
|
|
#include "nsDebug.h"
|
|
#include "mozilla/CheckedInt.h"
|
|
#include "mozilla/IntegerPrintfMacros.h"
|
|
|
|
// Ensure this is sufficiently aligned so that Elements() and co don't create
|
|
// unaligned pointers, or slices with unaligned pointers for empty arrays, see
|
|
// https://github.com/servo/servo/issues/22613.
|
|
alignas(8) nsTArrayHeader sEmptyTArrayHeader = {0, 0, 0};
|
|
|
|
bool IsTwiceTheRequiredBytesRepresentableAsUint32(size_t aCapacity,
|
|
size_t aElemSize) {
|
|
using mozilla::CheckedUint32;
|
|
return ((CheckedUint32(aCapacity) * aElemSize) * 2).isValid();
|
|
}
|
|
|
|
MOZ_NORETURN MOZ_COLD void InvalidArrayIndex_CRASH(size_t aIndex,
|
|
size_t aLength) {
|
|
MOZ_CRASH_UNSAFE_PRINTF(
|
|
"ElementAt(aIndex = %" PRIu64 ", aLength = %" PRIu64 ")",
|
|
static_cast<uint64_t>(aIndex), static_cast<uint64_t>(aLength));
|
|
}
|