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; counted_array_source(const Ch * buf,std::streamsize size)25 counted_array_source(const Ch* buf, std::streamsize size) 26 : buf_(buf), ptr_(0), end_(size) 27 { } read(Ch * s,std::streamsize n)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 } count() const40 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; counted_array_sinkboost::iostreams::detail::counted_array_sink51 counted_array_sink(Ch* buf, std::streamsize size) 52 : buf_(buf), ptr_(0), end_(size) 53 { } writeboost::iostreams::detail::counted_array_sink54 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 } countboost::iostreams::detail::counted_array_sink66 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 75