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91 lines
2.3 KiB
C++
91 lines
2.3 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
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_dom_BlobSet_h
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#define mozilla_dom_BlobSet_h
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#include "mozilla/CheckedInt.h"
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#include "mozilla/dom/File.h"
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namespace mozilla {
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namespace dom {
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class BlobSet {
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public:
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BlobSet()
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: mData(nullptr), mDataLen(0), mDataBufferLen(0)
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{}
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~BlobSet()
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{
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free(mData);
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}
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nsresult AppendVoidPtr(const void* aData, uint32_t aLength);
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nsresult AppendString(const nsAString& aString, bool nativeEOL, JSContext* aCx);
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nsresult AppendBlobImpl(BlobImpl* aBlobImpl);
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nsresult AppendBlobImpls(const nsTArray<RefPtr<BlobImpl>>& aBlobImpls);
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nsTArray<RefPtr<BlobImpl>>& GetBlobImpls() { Flush(); return mBlobImpls; }
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already_AddRefed<Blob> GetBlobInternal(nsISupports* aParent,
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const nsACString& aContentType,
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ErrorResult& aRv);
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protected:
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bool ExpandBufferSize(uint64_t aSize)
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{
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using mozilla::CheckedUint32;
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if (mDataBufferLen >= mDataLen + aSize) {
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mDataLen += aSize;
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return true;
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}
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// Start at 1 or we'll loop forever.
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CheckedUint32 bufferLen =
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std::max<uint32_t>(static_cast<uint32_t>(mDataBufferLen), 1);
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while (bufferLen.isValid() && bufferLen.value() < mDataLen + aSize)
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bufferLen *= 2;
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if (!bufferLen.isValid())
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return false;
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void* data = realloc(mData, bufferLen.value());
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if (!data)
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return false;
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mData = data;
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mDataBufferLen = bufferLen.value();
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mDataLen += aSize;
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return true;
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}
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void Flush() {
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if (mData) {
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// If we have some data, create a blob for it
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// and put it on the stack
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RefPtr<BlobImpl> blobImpl =
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new BlobImplMemory(mData, mDataLen, EmptyString());
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mBlobImpls.AppendElement(blobImpl);
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mData = nullptr; // The nsDOMMemoryFile takes ownership of the buffer
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mDataLen = 0;
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mDataBufferLen = 0;
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}
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}
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nsTArray<RefPtr<BlobImpl>> mBlobImpls;
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void* mData;
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uint64_t mDataLen;
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uint64_t mDataBufferLen;
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};
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} // namespace dom
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} // namespace mozilla
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#endif // mozilla_dom_BlobSet_h
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