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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_DETAIL_COUNTED_ARRAY_HPP_INCLUDED | |
9 | #define BOOST_IOSTREAMS_DETAIL_COUNTED_ARRAY_HPP_INCLUDED | |
10 | ||
11 | #include <algorithm> // min. | |
12 | #include <cstddef> // size_t | |
13 | #include <string> // char_traits | |
14 | #include <boost/iostreams/categories.hpp> | |
15 | #include <boost/iostreams/detail/char_traits.hpp> | |
16 | #include <boost/iostreams/detail/ios.hpp> // streamsize. | |
17 | ||
18 | namespace boost { namespace iostreams { namespace detail { | |
19 | ||
20 | template<typename Ch> | |
21 | class counted_array_source { | |
22 | public: | |
23 | typedef Ch char_type; | |
24 | typedef source_tag category; | |
25 | counted_array_source(const Ch* buf, std::streamsize size) | |
26 | : buf_(buf), ptr_(0), end_(size) | |
27 | { } | |
28 | std::streamsize read(Ch* s, std::streamsize n) | |
29 | { | |
30 | using namespace std; | |
31 | streamsize result = (std::min)(n, end_ - ptr_); | |
32 | char_traits<char_type>::copy( | |
33 | s, | |
34 | buf_ + ptr_, | |
35 | static_cast<size_t>(result) | |
36 | ); | |
37 | ptr_ += result; | |
38 | return result; | |
39 | } | |
40 | std::streamsize count() const { return ptr_; } | |
41 | private: | |
42 | const Ch* buf_; | |
43 | std::streamsize ptr_, end_; | |
44 | }; | |
45 | ||
46 | template<typename Ch> | |
47 | struct counted_array_sink { | |
48 | public: | |
49 | typedef Ch char_type; | |
50 | typedef sink_tag category; | |
51 | counted_array_sink(Ch* buf, std::streamsize size) | |
52 | : buf_(buf), ptr_(0), end_(size) | |
53 | { } | |
54 | std::streamsize write(const Ch* s, std::streamsize n) | |
55 | { | |
56 | using namespace std; | |
57 | std::streamsize result = (std::min)(n, end_ - ptr_); | |
58 | char_traits<char_type>::copy( | |
59 | buf_ + ptr_, | |
60 | s, | |
61 | static_cast<size_t>(result) | |
62 | ); | |
63 | ptr_ += result; | |
64 | return result; | |
65 | } | |
66 | std::streamsize count() const { return ptr_; } | |
67 | private: | |
68 | Ch* buf_; | |
69 | std::streamsize ptr_, end_; | |
70 | }; | |
71 | ||
72 | } } } // End namespaces iostreams, boost. | |
73 | ||
74 | #endif // #ifndef BOOST_IOSTREAMS_DETAIL_COUNTED_ARRAY_HPP_INCLUDED |