/src/libreoffice/package/source/zipapi/CRC32.cxx
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1 | | /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ |
2 | | /* |
3 | | * This file is part of the LibreOffice project. |
4 | | * |
5 | | * This Source Code Form is subject to the terms of the Mozilla Public |
6 | | * License, v. 2.0. If a copy of the MPL was not distributed with this |
7 | | * file, You can obtain one at http://mozilla.org/MPL/2.0/. |
8 | | * |
9 | | * This file incorporates work covered by the following license notice: |
10 | | * |
11 | | * Licensed to the Apache Software Foundation (ASF) under one or more |
12 | | * contributor license agreements. See the NOTICE file distributed |
13 | | * with this work for additional information regarding copyright |
14 | | * ownership. The ASF licenses this file to you under the Apache |
15 | | * License, Version 2.0 (the "License"); you may not use this file |
16 | | * except in compliance with the License. You may obtain a copy of |
17 | | * the License at http://www.apache.org/licenses/LICENSE-2.0 . |
18 | | */ |
19 | | |
20 | | #include <CRC32.hxx> |
21 | | #include <PackageConstants.hxx> |
22 | | #include <rtl/crc.h> |
23 | | #include <com/sun/star/io/XInputStream.hpp> |
24 | | |
25 | | using namespace com::sun::star::uno; |
26 | | using namespace com::sun::star::io; |
27 | | |
28 | | /** A class to compute the CRC32 value of a data stream |
29 | | */ |
30 | | |
31 | | CRC32::CRC32() |
32 | 185k | : nCRC(0) |
33 | 185k | { |
34 | 185k | } |
35 | | void CRC32::reset() |
36 | 0 | { |
37 | 0 | nCRC=0; |
38 | 0 | } |
39 | | sal_Int32 CRC32::getValue() const |
40 | 156k | { |
41 | 156k | return nCRC; |
42 | 156k | } |
43 | | /** Update CRC32 with specified sequence of bytes |
44 | | */ |
45 | | void CRC32::updateSegment(const Sequence< sal_Int8 > &b, sal_Int32 len) |
46 | 0 | { |
47 | 0 | nCRC = rtl_crc32(nCRC, b.getConstArray(), len ); |
48 | 0 | } |
49 | | void CRC32::updateSegment(const sal_Int8* b, sal_Int32 len) |
50 | 0 | { |
51 | 0 | nCRC = rtl_crc32(nCRC, b, len ); |
52 | 0 | } |
53 | | /** Update CRC32 with specified sequence of bytes |
54 | | */ |
55 | | void CRC32::update(const Sequence< sal_Int8 > &b) |
56 | 171k | { |
57 | 171k | nCRC = rtl_crc32(nCRC, b.getConstArray(),b.getLength()); |
58 | 171k | } |
59 | | |
60 | | sal_Int64 CRC32::updateStream( Reference < XInputStream > const & xStream ) |
61 | 0 | { |
62 | 0 | sal_Int32 nLength; |
63 | 0 | sal_Int64 nTotal = 0; |
64 | 0 | Sequence < sal_Int8 > aSeq ( n_ConstBufferSize ); |
65 | 0 | do |
66 | 0 | { |
67 | 0 | nLength = xStream->readBytes ( aSeq, n_ConstBufferSize ); |
68 | 0 | updateSegment ( aSeq, nLength ); |
69 | 0 | nTotal += nLength; |
70 | 0 | } |
71 | 0 | while ( nLength == n_ConstBufferSize ); |
72 | |
|
73 | 0 | return nTotal; |
74 | 0 | } |
75 | | |
76 | | /* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |