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