blob: 2440630db85622f1a74cd927a4f3b30f7cd3834c (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
|
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* 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/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include <CRC32.hxx>
#include <PackageConstants.hxx>
#include <rtl/crc.h>
#include <com/sun/star/io/XInputStream.hpp>
using namespace com::sun::star::uno;
using namespace com::sun::star::io;
/** A class to compute the CRC32 value of a data stream
*/
CRC32::CRC32()
: nCRC(0)
{
}
CRC32::~CRC32()
{
}
void CRC32::reset()
{
nCRC=0;
}
sal_Int32 CRC32::getValue() const
{
return nCRC;
}
/** Update CRC32 with specified sequence of bytes
*/
void CRC32::updateSegment(const Sequence< sal_Int8 > &b, sal_Int32 len)
{
nCRC = rtl_crc32(nCRC, b.getConstArray(), len );
}
/** Update CRC32 with specified sequence of bytes
*/
void CRC32::update(const Sequence< sal_Int8 > &b)
{
nCRC = rtl_crc32(nCRC, b.getConstArray(),b.getLength());
}
sal_Int64 CRC32::updateStream( Reference < XInputStream > const & xStream )
{
sal_Int32 nLength;
sal_Int64 nTotal = 0;
Sequence < sal_Int8 > aSeq ( n_ConstBufferSize );
do
{
nLength = xStream->readBytes ( aSeq, n_ConstBufferSize );
updateSegment ( aSeq, nLength );
nTotal += nLength;
}
while ( nLength == n_ConstBufferSize );
return nTotal;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|
