1 | // |
2 | // Base64Decoder.h |
3 | // |
4 | // Library: Foundation |
5 | // Package: Streams |
6 | // Module: Base64 |
7 | // |
8 | // Definition of class Base64Decoder. |
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_Base64Decoder_INCLUDED |
18 | #define Foundation_Base64Decoder_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 Base64DecoderBuf: public UnbufferedStreamBuf |
30 | /// This streambuf base64-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 | Base64DecoderBuf(std::istream& istr, int options = 0); |
41 | ~Base64DecoderBuf(); |
42 | |
43 | private: |
44 | int readFromDevice(); |
45 | int readOne(); |
46 | |
47 | int _options; |
48 | unsigned char _group[3]; |
49 | int _groupLength; |
50 | int _groupIndex; |
51 | std::streambuf& _buf; |
52 | const unsigned char* _pInEncoding; |
53 | |
54 | static unsigned char IN_ENCODING[256]; |
55 | static bool IN_ENCODING_INIT; |
56 | static unsigned char IN_ENCODING_URL[256]; |
57 | static bool IN_ENCODING_URL_INIT; |
58 | |
59 | private: |
60 | Base64DecoderBuf(const Base64DecoderBuf&); |
61 | Base64DecoderBuf& operator = (const Base64DecoderBuf&); |
62 | }; |
63 | |
64 | |
65 | class Foundation_API Base64DecoderIOS: public virtual std::ios |
66 | /// The base class for Base64Decoder. |
67 | /// |
68 | /// This class is needed to ensure the correct initialization |
69 | /// order of the stream buffer and base classes. |
70 | { |
71 | public: |
72 | Base64DecoderIOS(std::istream& istr, int options = 0); |
73 | ~Base64DecoderIOS(); |
74 | Base64DecoderBuf* rdbuf(); |
75 | |
76 | protected: |
77 | Base64DecoderBuf _buf; |
78 | |
79 | private: |
80 | Base64DecoderIOS(const Base64DecoderIOS&); |
81 | Base64DecoderIOS& operator = (const Base64DecoderIOS&); |
82 | }; |
83 | |
84 | |
85 | class Foundation_API Base64Decoder: public Base64DecoderIOS, public std::istream |
86 | /// This istream base64-decodes all data |
87 | /// read from the istream connected to it. |
88 | /// |
89 | /// Note: For performance reasons, the characters |
90 | /// are read directly from the given istream's |
91 | /// underlying streambuf, so the state |
92 | /// of the istream will not reflect that of |
93 | /// its streambuf. |
94 | { |
95 | public: |
96 | Base64Decoder(std::istream& istr, int options = 0); |
97 | ~Base64Decoder(); |
98 | |
99 | private: |
100 | Base64Decoder(const Base64Decoder&); |
101 | Base64Decoder& operator = (const Base64Decoder&); |
102 | }; |
103 | |
104 | |
105 | } // namespace Poco |
106 | |
107 | |
108 | #endif // Foundation_Base64Decoder_INCLUDED |
109 | |