1 | // |
2 | // Base32Decoder.h |
3 | // |
4 | // Library: Foundation |
5 | // Package: Streams |
6 | // Module: Base32 |
7 | // |
8 | // Definition of class Base32Decoder. |
9 | // |
10 | // Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH. |
11 | // and Contributors. |
12 | // |
13 | // SPDX-License-Identifier: BSL-1.0 |
14 | // |
15 | |
16 | |
17 | #ifndef Foundation_Base32Decoder_INCLUDED |
18 | #define Foundation_Base32Decoder_INCLUDED |
19 | |
20 | |
21 | #include "Poco/Foundation.h" |
22 | #include "Poco/UnbufferedStreamBuf.h" |
23 | #include <istream> |
24 | |
25 | |
26 | namespace Poco { |
27 | |
28 | |
29 | class Foundation_API Base32DecoderBuf: public UnbufferedStreamBuf |
30 | /// This streambuf base32-decodes all data read |
31 | /// from the istream connected to it. |
32 | /// |
33 | /// Note: For performance reasons, the characters |
34 | /// are read directly from the given istream's |
35 | /// underlying streambuf, so the state |
36 | /// of the istream will not reflect that of |
37 | /// its streambuf. |
38 | { |
39 | public: |
40 | Base32DecoderBuf(std::istream& istr); |
41 | ~Base32DecoderBuf(); |
42 | |
43 | private: |
44 | int readFromDevice(); |
45 | int readOne(); |
46 | |
47 | unsigned char _group[8]; |
48 | int _groupLength; |
49 | int _groupIndex; |
50 | std::streambuf& _buf; |
51 | |
52 | static unsigned char IN_ENCODING[256]; |
53 | static bool IN_ENCODING_INIT; |
54 | |
55 | private: |
56 | Base32DecoderBuf(const Base32DecoderBuf&); |
57 | Base32DecoderBuf& operator = (const Base32DecoderBuf&); |
58 | }; |
59 | |
60 | |
61 | class Foundation_API Base32DecoderIOS: public virtual std::ios |
62 | /// The base class for Base32Decoder. |
63 | /// |
64 | /// This class is needed to ensure the correct initialization |
65 | /// order of the stream buffer and base classes. |
66 | { |
67 | public: |
68 | Base32DecoderIOS(std::istream& istr); |
69 | ~Base32DecoderIOS(); |
70 | Base32DecoderBuf* rdbuf(); |
71 | |
72 | protected: |
73 | Base32DecoderBuf _buf; |
74 | |
75 | private: |
76 | Base32DecoderIOS(const Base32DecoderIOS&); |
77 | Base32DecoderIOS& operator = (const Base32DecoderIOS&); |
78 | }; |
79 | |
80 | |
81 | class Foundation_API Base32Decoder: public Base32DecoderIOS, public std::istream |
82 | /// This istream base32-decodes all data |
83 | /// read from the istream connected to it. |
84 | /// |
85 | /// Note: For performance reasons, the characters |
86 | /// are read directly from the given istream's |
87 | /// underlying streambuf, so the state |
88 | /// of the istream will not reflect that of |
89 | /// its streambuf. |
90 | { |
91 | public: |
92 | Base32Decoder(std::istream& istr); |
93 | ~Base32Decoder(); |
94 | |
95 | private: |
96 | Base32Decoder(const Base32Decoder&); |
97 | Base32Decoder& operator = (const Base32Decoder&); |
98 | }; |
99 | |
100 | |
101 | } // namespace Poco |
102 | |
103 | |
104 | #endif // Foundation_Base32Decoder_INCLUDED |
105 | |