зеркало из https://github.com/mozilla/gecko-dev.git
139 строки
3.0 KiB
C++
139 строки
3.0 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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#include "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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#include "MultipartBlobImpl.h"
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namespace mozilla {
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namespace dom {
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already_AddRefed<Blob>
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BlobSet::GetBlobInternal(nsISupports* aParent,
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const nsACString& aContentType,
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ErrorResult& aRv)
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{
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RefPtr<BlobImpl> blobImpl =
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MultipartBlobImpl::Create(GetBlobImpls(),
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NS_ConvertASCIItoUTF16(aContentType),
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aRv);
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if (NS_WARN_IF(aRv.Failed())) {
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return nullptr;
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}
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RefPtr<Blob> blob = Blob::Create(aParent, blobImpl);
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return blob.forget();
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}
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nsresult
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BlobSet::AppendVoidPtr(const void* aData, uint32_t aLength)
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{
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NS_ENSURE_ARG_POINTER(aData);
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if (!aLength) {
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return NS_OK;
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}
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uint64_t offset = mDataLen;
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if (!ExpandBufferSize(aLength)) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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memcpy((char*)mData + offset, aData, aLength);
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return NS_OK;
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}
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nsresult
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BlobSet::AppendString(const nsAString& aString, bool nativeEOL, JSContext* aCx)
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{
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nsCString utf8Str = NS_ConvertUTF16toUTF8(aString);
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if (nativeEOL) {
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if (utf8Str.Contains('\r')) {
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utf8Str.ReplaceSubstring("\r\n", "\n");
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utf8Str.ReplaceSubstring("\r", "\n");
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}
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#ifdef XP_WIN
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utf8Str.ReplaceSubstring("\n", "\r\n");
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#endif
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}
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return AppendVoidPtr((void*)utf8Str.Data(),
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utf8Str.Length());
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}
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nsresult
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BlobSet::AppendBlobImpl(BlobImpl* aBlobImpl)
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{
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NS_ENSURE_ARG_POINTER(aBlobImpl);
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Flush();
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mBlobImpls.AppendElement(aBlobImpl);
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return NS_OK;
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}
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nsresult
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BlobSet::AppendBlobImpls(const nsTArray<RefPtr<BlobImpl>>& aBlobImpls)
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{
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Flush();
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mBlobImpls.AppendElements(aBlobImpls);
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return NS_OK;
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}
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bool
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BlobSet::ExpandBufferSize(uint64_t aSize)
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{
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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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}
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if (!bufferLen.isValid()) {
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return false;
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}
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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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}
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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
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BlobSet::Flush()
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{
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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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return;
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}
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}
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} // dom namespace
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} // mozilla namespace
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