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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