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.)
6 // See http://www.boost.org/libs/iostreams for documentation.
8 #ifndef BOOST_IOSTREAMS_COUNTER_HPP_INCLUDED
9 #define BOOST_IOSTREAMS_COUNTER_HPP_INCLUDED
11 #if defined(_MSC_VER) && (_MSC_VER >= 1020)
15 #include <algorithm> // count.
16 #include <boost/iostreams/categories.hpp>
17 #include <boost/iostreams/char_traits.hpp>
18 #include <boost/iostreams/operations.hpp>
19 #include <boost/iostreams/pipeline.hpp>
22 #include <boost/iostreams/detail/config/disable_warnings.hpp> // VC7.1 C4244.
24 namespace boost { namespace iostreams {
27 // Template name: basic_counter.
28 // Template paramters:
29 // Ch - The character type.
30 // Description: Filter which counts lines and characters.
40 optimally_buffered_tag
42 explicit basic_counter(int first_line = 0, int first_char = 0)
43 : lines_(first_line), chars_(first_char)
45 int lines() const { return lines_; }
46 int characters() const { return chars_; }
47 std::streamsize optimal_buffer_size() const { return 0; }
49 template<typename Source>
50 std::streamsize read(Source& src, char_type* s, std::streamsize n)
52 std::streamsize result = iostreams::read(src, s, n);
55 lines_ += std::count(s, s + result, char_traits<Ch>::newline());
60 template<typename Sink>
61 std::streamsize write(Sink& snk, const char_type* s, std::streamsize n)
63 std::streamsize result = iostreams::write(snk, s, n);
64 lines_ += std::count(s, s + result, char_traits<Ch>::newline());
72 BOOST_IOSTREAMS_PIPABLE(basic_counter, 1)
75 typedef basic_counter<char> counter;
76 typedef basic_counter<wchar_t> wcounter;
78 } } // End namespaces iostreams, boost.
80 #include <boost/iostreams/detail/config/enable_warnings.hpp>
82 #endif // #ifndef BOOST_IOSTREAMS_COUNTER_HPP_INCLUDED