forked from mirrors/gecko-dev
8aaf44fea9
* nsStringBuffer::FromString -> nsTSubString::GetStringBuffer * nsStringBuffer::ToString -> nsTSubString::Assign(nsStringBuffer*, len) * Move refcounting inline but refcount-logging and other XPCOM-related things out-of-line. Differential Revision: https://phabricator.services.mozilla.com/D208771
70 lines
2.5 KiB
C++
70 lines
2.5 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsStringBuffer.h"
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#include "mozilla/MemoryReporting.h"
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#include "mozilla/RefPtr.h"
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template <typename CharT>
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static already_AddRefed<nsStringBuffer> DoCreate(const CharT* aData,
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size_t aLength) {
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RefPtr<nsStringBuffer> buffer =
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nsStringBuffer::Alloc((aLength + 1) * sizeof(CharT));
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if (MOZ_UNLIKELY(!buffer)) {
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return nullptr;
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}
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auto* data = reinterpret_cast<CharT*>(buffer->Data());
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memcpy(data, aData, aLength * sizeof(CharT));
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data[aLength] = 0;
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return buffer.forget();
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}
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already_AddRefed<nsStringBuffer> nsStringBuffer::Create(const char* aData,
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size_t aLength) {
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return DoCreate(aData, aLength);
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}
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already_AddRefed<nsStringBuffer> nsStringBuffer::Create(const char16_t* aData,
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size_t aLength) {
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return DoCreate(aData, aLength);
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}
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nsStringBuffer* nsStringBuffer::Realloc(nsStringBuffer* aHdr, size_t aSize) {
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MOZ_ASSERT(aSize != 0, "zero capacity allocation not allowed");
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MOZ_ASSERT(sizeof(nsStringBuffer) + aSize <= size_t(uint32_t(-1)) &&
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sizeof(nsStringBuffer) + aSize > aSize,
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"mStorageSize will truncate");
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// no point in trying to save ourselves if we hit this assertion
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MOZ_ASSERT(!aHdr->IsReadonly(), "|Realloc| attempted on readonly string");
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// Treat this as a release and addref for refcounting purposes, since we
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// just asserted that the refcount is 1. If we don't do that, refcount
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// logging will claim we've leaked all sorts of stuff.
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{
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mozilla::detail::RefCountLogger::ReleaseLogger logger(aHdr);
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logger.logRelease(0);
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}
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aHdr = (nsStringBuffer*)realloc(aHdr, sizeof(nsStringBuffer) + aSize);
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if (aHdr) {
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mozilla::detail::RefCountLogger::logAddRef(aHdr, 1);
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aHdr->mStorageSize = aSize;
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}
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return aHdr;
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}
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size_t nsStringBuffer::SizeOfIncludingThisIfUnshared(
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mozilla::MallocSizeOf aMallocSizeOf) const {
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return IsReadonly() ? 0 : aMallocSizeOf(this);
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}
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size_t nsStringBuffer::SizeOfIncludingThisEvenIfShared(
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mozilla::MallocSizeOf aMallocSizeOf) const {
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return aMallocSizeOf(this);
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}
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