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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/. */
#include "nsCRT.h"
#include "nsISupportsImpl.h"
#include "nsCheckSummedOutputStream.h"
#include "crc32c.h"
////////////////////////////////////////////////////////////////////////////////
// nsCheckSummedOutputStream
NS_IMPL_ISUPPORTS_INHERITED(nsCheckSummedOutputStream, nsBufferedOutputStream,
nsISafeOutputStream)
NS_IMETHODIMP
nsCheckSummedOutputStream::Init(nsIOutputStream* stream, uint32_t bufferSize) {
nsresult rv;
mHash = do_CreateInstance(NS_CRYPTO_HASH_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
rv = mHash->Init(nsICryptoHash::MD5);
NS_ENSURE_SUCCESS(rv, rv);
return nsBufferedOutputStream::Init(stream, bufferSize);
}
NS_IMETHODIMP
nsCheckSummedOutputStream::Finish() {
nsresult rv = mHash->Finish(false, mCheckSum);
NS_ENSURE_SUCCESS(rv, rv);
uint32_t written;
rv = nsBufferedOutputStream::Write(
reinterpret_cast<const char*>(mCheckSum.BeginReading()),
mCheckSum.Length(), &written);
NS_ASSERTION(written == mCheckSum.Length(), "Error writing stream checksum");
NS_ENSURE_SUCCESS(rv, rv);
return nsBufferedOutputStream::Finish();
}
NS_IMETHODIMP
nsCheckSummedOutputStream::Write(const char* buf, uint32_t count,
uint32_t* result) {
nsresult rv = mHash->Update(reinterpret_cast<const uint8_t*>(buf), count);
NS_ENSURE_SUCCESS(rv, rv);
return nsBufferedOutputStream::Write(buf, count, result);
}
////////////////////////////////////////////////////////////////////////////////
// nsCrc32CheckSumedOutputStream
NS_IMPL_ISUPPORTS_INHERITED(nsCrc32CheckSumedOutputStream,
nsBufferedOutputStream, nsISafeOutputStream)
NS_IMETHODIMP
nsCrc32CheckSumedOutputStream::Init(nsIOutputStream* stream,
uint32_t bufferSize) {
mCheckSum = ~0;
return nsBufferedOutputStream::Init(stream, bufferSize);
}
NS_IMETHODIMP
nsCrc32CheckSumedOutputStream::Finish() {
uint32_t written;
nsresult rv = nsBufferedOutputStream::Write(
reinterpret_cast<const char*>(&mCheckSum), sizeof(mCheckSum), &written);
NS_ASSERTION(written == sizeof(mCheckSum), "Error writing stream checksum");
NS_ENSURE_SUCCESS(rv, rv);
return nsBufferedOutputStream::Finish();
}
NS_IMETHODIMP
nsCrc32CheckSumedOutputStream::Write(const char* buf, uint32_t count,
uint32_t* result) {
mCheckSum =
ComputeCrc32c(mCheckSum, reinterpret_cast<const uint8_t*>(buf), count);
return nsBufferedOutputStream::Write(buf, count, result);
}
////////////////////////////////////////////////////////////////////////////////