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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 : #ifndef INCLUDED_PACKAGE_SOURCE_ZIPAPI_MEMORYBYTEGRABBER_HXX
20 : #define INCLUDED_PACKAGE_SOURCE_ZIPAPI_MEMORYBYTEGRABBER_HXX
21 :
22 : #include <com/sun/star/io/XInputStream.hpp>
23 : #include <com/sun/star/io/XSeekable.hpp>
24 : #include <string.h>
25 :
26 12068 : class MemoryByteGrabber
27 : {
28 : protected:
29 : const com::sun::star::uno::Sequence < sal_Int8 > maBuffer;
30 : const sal_Int8 *mpBuffer;
31 : sal_Int32 mnCurrent, mnEnd;
32 : public:
33 12068 : MemoryByteGrabber ( const com::sun::star::uno::Sequence < sal_Int8 > & rBuffer )
34 : : maBuffer ( rBuffer )
35 12068 : , mpBuffer ( rBuffer.getConstArray() )
36 : , mnCurrent ( 0 )
37 24136 : , mnEnd ( rBuffer.getLength() )
38 : {
39 12068 : }
40 : MemoryByteGrabber()
41 : {
42 : }
43 853903 : const sal_Int8 * getCurrentPos () { return mpBuffer + mnCurrent; }
44 :
45 : // XInputStream chained
46 : sal_Int32 SAL_CALL readBytes( com::sun::star::uno::Sequence< sal_Int8 >& aData,
47 : sal_Int32 nBytesToRead )
48 : throw(com::sun::star::io::NotConnectedException, com::sun::star::io::BufferSizeExceededException, com::sun::star::io::IOException, com::sun::star::uno::RuntimeException)
49 : {
50 : if ( nBytesToRead < 0)
51 : throw com::sun::star::io::BufferSizeExceededException();
52 :
53 : if (nBytesToRead + mnCurrent > mnEnd)
54 : nBytesToRead = mnEnd - mnCurrent;
55 :
56 : aData.realloc ( nBytesToRead );
57 : memcpy( aData.getArray(), mpBuffer + mnCurrent, nBytesToRead );
58 : mnCurrent += nBytesToRead;
59 : return nBytesToRead;
60 : }
61 :
62 : sal_Int32 SAL_CALL readSomeBytes( com::sun::star::uno::Sequence< sal_Int8 >& aData,
63 : sal_Int32 nMaxBytesToRead )
64 : throw(com::sun::star::io::NotConnectedException, com::sun::star::io::BufferSizeExceededException, com::sun::star::io::IOException, com::sun::star::uno::RuntimeException)
65 : {
66 : return readBytes( aData, nMaxBytesToRead );
67 : }
68 2561709 : void SAL_CALL skipBytes( sal_Int32 nBytesToSkip )
69 : throw(com::sun::star::io::NotConnectedException, com::sun::star::io::BufferSizeExceededException, com::sun::star::io::IOException, com::sun::star::uno::RuntimeException)
70 : {
71 2561709 : mnCurrent += nBytesToSkip;
72 2561709 : }
73 : sal_Int32 SAL_CALL available( )
74 : throw(com::sun::star::io::NotConnectedException, com::sun::star::io::IOException, com::sun::star::uno::RuntimeException)
75 : {
76 : return mnEnd - mnCurrent;
77 : }
78 :
79 : // XSeekable chained...
80 : sal_Int64 SAL_CALL seek( sal_Int64 location )
81 : throw(com::sun::star::lang::IllegalArgumentException, com::sun::star::io::IOException, com::sun::star::uno::RuntimeException)
82 : {
83 : if ( location < 0 || location > mnEnd )
84 : throw com::sun::star::lang::IllegalArgumentException ();
85 : mnCurrent = static_cast < sal_Int32 > ( location );
86 : return mnCurrent;
87 : }
88 : sal_Int64 SAL_CALL getPosition( )
89 : throw(com::sun::star::io::IOException, com::sun::star::uno::RuntimeException)
90 : {
91 : return mnCurrent;
92 : }
93 : sal_Int64 SAL_CALL getLength( )
94 : throw(com::sun::star::io::IOException, com::sun::star::uno::RuntimeException)
95 : {
96 : return mnEnd;
97 : }
98 : sal_Int8 ReadInt8()
99 : {
100 : if (mnCurrent + 1 > mnEnd )
101 : return 0;
102 : return mpBuffer [mnCurrent++] & 0xFF;
103 : }
104 5123418 : sal_Int16 ReadInt16()
105 : {
106 5123418 : if (mnCurrent + 2 > mnEnd )
107 0 : return 0;
108 5123418 : sal_Int16 nInt16 = mpBuffer[mnCurrent++] & 0xFF;
109 5123418 : nInt16 |= ( mpBuffer[mnCurrent++] & 0xFF ) << 8;
110 5123418 : return nInt16;
111 : }
112 2561709 : sal_Int32 ReadInt32()
113 : {
114 2561709 : if (mnCurrent + 4 > mnEnd )
115 0 : return 0;
116 :
117 2561709 : sal_Int32 nInt32 = mpBuffer[mnCurrent++] & 0xFF;
118 2561709 : nInt32 |= ( mpBuffer[mnCurrent++] & 0xFF ) << 8;
119 2561709 : nInt32 |= ( mpBuffer[mnCurrent++] & 0xFF ) << 16;
120 2561709 : nInt32 |= ( mpBuffer[mnCurrent++] & 0xFF ) << 24;
121 2561709 : return nInt32;
122 : }
123 :
124 : sal_uInt8 ReadUInt8()
125 : {
126 : if (mnCurrent + 1 > mnEnd )
127 : return 0;
128 : return mpBuffer [mnCurrent++] & 0xFF;
129 : }
130 : sal_uInt16 ReadUInt16()
131 : {
132 : if (mnCurrent + 2 > mnEnd )
133 : return 0;
134 :
135 : sal_uInt16 nInt16 = mpBuffer [mnCurrent++] & 0xFF;
136 : nInt16 |= ( mpBuffer [mnCurrent++] & 0xFF ) << 8;
137 : return nInt16;
138 : }
139 2561709 : sal_uInt32 ReadUInt32()
140 : {
141 2561709 : if (mnCurrent + 4 > mnEnd )
142 0 : return 0;
143 :
144 2561709 : sal_uInt32 nInt32 = mpBuffer [mnCurrent++] & 0xFF;
145 2561709 : nInt32 |= ( mpBuffer [mnCurrent++] & 0xFF ) << 8;
146 2561709 : nInt32 |= ( mpBuffer [mnCurrent++] & 0xFF ) << 16;
147 2561709 : nInt32 |= ( mpBuffer [mnCurrent++] & 0xFF ) << 24;
148 2561709 : return nInt32;
149 : }
150 : };
151 :
152 : #endif
153 :
154 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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