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//* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/. */
#ifndef nsCheckSummedOutputStream_h__
#define nsCheckSummedOutputStream_h__
#include "nsIFile.h"
#include "nsIOutputStream.h"
#include "nsICryptoHash.h"
#include "nsNetCID.h"
#include "nsNetUtil.h"
#include "nsString.h"
#include "../../../netwerk/base/nsBufferedStreams.h"
#include "prio.h"
class nsCheckSummedOutputStream : public nsBufferedOutputStream {
public:
NS_DECL_ISUPPORTS_INHERITED
// Size of MD5 hash in bytes
static const uint32_t CHECKSUM_SIZE = 16;
static const uint32_t MAX_BUFFER_SIZE = 64 * 1024;
nsCheckSummedOutputStream() = default;
NS_IMETHOD Finish() override;
NS_IMETHOD Write(const char* buf, uint32_t count, uint32_t* result) override;
NS_IMETHOD Init(nsIOutputStream* stream, uint32_t bufferSize) override;
protected:
virtual ~nsCheckSummedOutputStream() { nsBufferedOutputStream::Close(); }
nsCOMPtr<nsICryptoHash> mHash;
nsCString mCheckSum;
};
// returns a file output stream which can be QI'ed to nsIFileOutputStream.
inline nsresult NS_NewCheckSummedOutputStream(nsIOutputStream** result,
nsIFile* file) {
nsCOMPtr<nsIOutputStream> localOutFile;
nsresult rv =
NS_NewSafeLocalFileOutputStream(getter_AddRefs(localOutFile), file,
PR_WRONLY | PR_TRUNCATE | PR_CREATE_FILE);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIBufferedOutputStream> out = new nsCheckSummedOutputStream();
rv = out->Init(localOutFile, nsCheckSummedOutputStream::MAX_BUFFER_SIZE);
if (NS_SUCCEEDED(rv)) {
out.forget(result);
}
return rv;
}
class nsCrc32CheckSumedOutputStream : public nsBufferedOutputStream {
public:
NS_DECL_ISUPPORTS_INHERITED
static const uint32_t CHECKSUM_SIZE = 4;
nsCrc32CheckSumedOutputStream() = default;
NS_IMETHOD Finish() override;
NS_IMETHOD Write(const char* buf, uint32_t count, uint32_t* result) override;
NS_IMETHOD Init(nsIOutputStream* stream, uint32_t bufferSize) override;
protected:
virtual ~nsCrc32CheckSumedOutputStream() { nsBufferedOutputStream::Close(); }
uint32_t mCheckSum;
};
inline nsresult NS_NewCrc32OutputStream(
nsIOutputStream** aResult, already_AddRefed<nsIOutputStream> aOutput,
uint32_t aBufferSize) {
nsCOMPtr<nsIOutputStream> out = std::move(aOutput);
nsCOMPtr<nsIBufferedOutputStream> bufferOutput =
new nsCrc32CheckSumedOutputStream();
nsresult rv = bufferOutput->Init(out, aBufferSize);
if (NS_SUCCEEDED(rv)) {
bufferOutput.forget(aResult);
}
return rv;
}
#endif
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