1 | // (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com) |
2 | // (C) Copyright 2005-2007 Jonathan Turkanis |
3 | // Distributed under the Boost Software License, Version 1.0. (See accompanying |
4 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.) |
5 | |
6 | // See http://www.boost.org/libs/iostreams for documentation. |
7 | |
8 | #ifndef BOOST_IOSTREAMS_UNIX2DOS_FILTER_FILTER_HPP_INCLUDED |
9 | #define BOOST_IOSTREAMS_UNIX2DOS_FILTER_FILTER_HPP_INCLUDED |
10 | |
11 | #include <cassert> |
12 | #include <cstdio> // EOF. |
13 | #include <iostream> // cin, cout. |
14 | #include <boost/iostreams/concepts.hpp> |
15 | #include <boost/iostreams/filter/stdio.hpp> |
16 | #include <boost/iostreams/operations.hpp> |
17 | |
18 | namespace boost { namespace iostreams { namespace example { |
19 | |
20 | class unix2dos_stdio_filter : public stdio_filter { |
21 | private: |
22 | void do_filter() |
23 | { |
24 | int c; |
25 | while ((c = std::cin.get()) != EOF) { |
26 | if (c == '\n') |
27 | std::cout.put(c: '\r'); |
28 | std::cout.put(c: c); |
29 | } |
30 | } |
31 | }; |
32 | |
33 | class unix2dos_input_filter : public input_filter { |
34 | public: |
35 | unix2dos_input_filter() : has_linefeed_(false) { } |
36 | |
37 | template<typename Source> |
38 | int get(Source& src) |
39 | { |
40 | if (has_linefeed_) { |
41 | has_linefeed_ = false; |
42 | return '\n'; |
43 | } |
44 | |
45 | int c; |
46 | if ((c = iostreams::get(src)) == '\n') { |
47 | has_linefeed_ = true; |
48 | return '\r'; |
49 | } |
50 | |
51 | return c; |
52 | } |
53 | |
54 | template<typename Source> |
55 | void close(Source&) { has_linefeed_ = false; } |
56 | private: |
57 | bool has_linefeed_; |
58 | }; |
59 | |
60 | class unix2dos_output_filter : public output_filter { |
61 | public: |
62 | unix2dos_output_filter() : has_linefeed_(false) { } |
63 | |
64 | template<typename Sink> |
65 | bool put(Sink& dest, int c) |
66 | { |
67 | if (c == '\n') |
68 | return has_linefeed_ ? |
69 | put_char(dest, '\n') : |
70 | put_char(dest, '\r') ? |
71 | this->put(dest, '\n') : |
72 | false; |
73 | return iostreams::put(dest, c); |
74 | } |
75 | |
76 | template<typename Sink> |
77 | void close(Sink&) { has_linefeed_ = false; } |
78 | private: |
79 | template<typename Sink> |
80 | bool put_char(Sink& dest, int c) |
81 | { |
82 | bool result; |
83 | if ((result = iostreams::put(dest, c)) == true) { |
84 | has_linefeed_ = |
85 | c == '\r' ? |
86 | true : |
87 | c == '\n' ? |
88 | false : |
89 | has_linefeed_; |
90 | } |
91 | return result; |
92 | } |
93 | |
94 | bool has_linefeed_; |
95 | }; |
96 | |
97 | } } } // End namespaces example, iostreams, boost. |
98 | |
99 | #endif // #ifndef BOOST_IOSTREAMS_UNIX2DOS_FILTER_FILTER_HPP_INCLUDED |
100 | |