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40 lines
1.4 KiB
C++
40 lines
1.4 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 "IndexedDBCommon.h"
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#include "js/StructuredClone.h"
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#include "mozilla/SnappyUncompressInputStream.h"
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namespace mozilla::dom::indexedDB {
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// aStructuredCloneData is a parameter rather than a return value because one
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// caller preallocates it on the heap not immediately before calling for some
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// reason. Maybe this could be changed.
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nsresult SnappyUncompressStructuredCloneData(
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nsIInputStream& aInputStream, JSStructuredCloneData& aStructuredCloneData) {
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const auto snappyInputStream =
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MakeRefPtr<SnappyUncompressInputStream>(&aInputStream);
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char buffer[kFileCopyBufferSize];
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QM_TRY(CollectEach(
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[&snappyInputStream = *snappyInputStream, &buffer] {
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QM_TRY_RETURN(MOZ_TO_RESULT_INVOKE_MEMBER(snappyInputStream, Read,
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buffer, sizeof(buffer)));
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},
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[&aStructuredCloneData,
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&buffer](const uint32_t& numRead) -> Result<Ok, nsresult> {
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QM_TRY(OkIf(aStructuredCloneData.AppendBytes(buffer, numRead)),
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Err(NS_ERROR_OUT_OF_MEMORY));
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return Ok{};
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}));
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return NS_OK;
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}
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} // namespace mozilla::dom::indexedDB
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