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/* -*- 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 "nsStringBuffer.h"
#include "mozilla/MemoryReporting.h"
#include "mozilla/RefPtr.h"
template <typename CharT>
static already_AddRefed<nsStringBuffer> DoCreate(const CharT* aData,
size_t aLength) {
RefPtr<nsStringBuffer> buffer =
nsStringBuffer::Alloc((aLength + 1) * sizeof(CharT));
if (MOZ_UNLIKELY(!buffer)) {
return nullptr;
}
auto* data = reinterpret_cast<CharT*>(buffer->Data());
memcpy(data, aData, aLength * sizeof(CharT));
data[aLength] = 0;
return buffer.forget();
}
already_AddRefed<nsStringBuffer> nsStringBuffer::Create(const char* aData,
size_t aLength) {
return DoCreate(aData, aLength);
}
already_AddRefed<nsStringBuffer> nsStringBuffer::Create(const char16_t* aData,
size_t aLength) {
return DoCreate(aData, aLength);
}
nsStringBuffer* nsStringBuffer::Realloc(nsStringBuffer* aHdr, size_t aSize) {
MOZ_ASSERT(aSize != 0, "zero capacity allocation not allowed");
MOZ_ASSERT(sizeof(nsStringBuffer) + aSize <= size_t(uint32_t(-1)) &&
sizeof(nsStringBuffer) + aSize > aSize,
"mStorageSize will truncate");
// no point in trying to save ourselves if we hit this assertion
MOZ_ASSERT(!aHdr->IsReadonly(), "|Realloc| attempted on readonly string");
// Treat this as a release and addref for refcounting purposes, since we
// just asserted that the refcount is 1. If we don't do that, refcount
// logging will claim we've leaked all sorts of stuff.
{
mozilla::detail::RefCountLogger::ReleaseLogger logger(aHdr);
logger.logRelease(0);
}
aHdr = (nsStringBuffer*)realloc(aHdr, sizeof(nsStringBuffer) + aSize);
if (aHdr) {
mozilla::detail::RefCountLogger::logAddRef(aHdr, 1);
aHdr->mStorageSize = aSize;
}
return aHdr;
}
size_t nsStringBuffer::SizeOfIncludingThisIfUnshared(
mozilla::MallocSizeOf aMallocSizeOf) const {
return IsReadonly() ? 0 : aMallocSizeOf(this);
}
size_t nsStringBuffer::SizeOfIncludingThisEvenIfShared(
mozilla::MallocSizeOf aMallocSizeOf) const {
return aMallocSizeOf(this);
}
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