[857] | 1 | #ifndef BOOST_ARCHIVE_ITERATORS_WCHAR_FROM_MB_HPP
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| 2 | #define BOOST_ARCHIVE_ITERATORS_WCHAR_FROM_MB_HPP
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| 3 |
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| 4 | // MS compatible compilers support #pragma once
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| 5 | #if defined(_MSC_VER) && (_MSC_VER >= 1020)
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| 6 | # pragma once
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| 7 | #endif
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| 8 |
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| 9 | /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
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| 10 | // wchar_from_mb.hpp
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| 11 |
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| 12 | // (C) Copyright 2002 Robert Ramey - http://www.rrsd.com .
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| 13 | // Use, modification and distribution is subject to the Boost Software
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| 14 | // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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| 15 | // http://www.boost.org/LICENSE_1_0.txt)
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| 16 |
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| 17 | // See http://www.boost.org for updates, documentation, and revision history.
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| 18 |
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| 19 | #include <cassert>
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| 20 | #include <cctype>
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| 21 | #include <cstddef> // size_t
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| 22 | #include <cstdlib> // mblen
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| 23 |
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| 24 | #include <boost/config.hpp> // for BOOST_DEDUCED_TYPENAME
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| 25 | #if defined(BOOST_NO_STDC_NAMESPACE)
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| 26 | namespace std{
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| 27 | using ::mblen;
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| 28 | using ::mbtowc;
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| 29 | } // namespace std
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| 30 | #endif
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| 31 |
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| 32 | #include <boost/throw_exception.hpp>
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| 33 | #include <boost/pfto.hpp>
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| 34 |
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| 35 | #include <boost/iterator/iterator_adaptor.hpp>
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| 36 | #include <boost/archive/iterators/dataflow_exception.hpp>
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| 37 |
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| 38 | namespace boost {
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| 39 | namespace archive {
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| 40 | namespace iterators {
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| 41 |
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| 42 | /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
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| 43 | // class used by text archives to translate char strings to wchar_t
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| 44 | // strings of the currently selected locale
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| 45 | template<class Base>
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| 46 | class wchar_from_mb
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| 47 | : public boost::iterator_adaptor<
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| 48 | wchar_from_mb<Base>,
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| 49 | Base,
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| 50 | wchar_t,
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| 51 | single_pass_traversal_tag,
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| 52 | wchar_t
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| 53 | >
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| 54 | {
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| 55 | friend class boost::iterator_core_access;
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| 56 | typedef BOOST_DEDUCED_TYPENAME boost::iterator_adaptor<
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| 57 | wchar_from_mb<Base>,
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| 58 | Base,
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| 59 | wchar_t,
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| 60 | single_pass_traversal_tag,
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| 61 | wchar_t
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| 62 | > super_t;
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| 63 |
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| 64 | typedef wchar_from_mb<Base> this_t;
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| 65 |
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| 66 | wchar_t drain();
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| 67 |
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| 68 | wchar_t dereference_impl() {
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| 69 | if(! m_full){
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| 70 | m_current_value = drain();
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| 71 | m_full = true;
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| 72 | }
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| 73 | return m_current_value;
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| 74 | }
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| 75 |
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| 76 | wchar_t dereference() const {
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| 77 | return const_cast<this_t *>(this)->dereference_impl();
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| 78 | }
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| 79 |
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| 80 | void increment(){
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| 81 | dereference_impl();
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| 82 | m_full = false;
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| 83 | ++(this->base_reference());
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| 84 | };
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| 85 |
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| 86 | wchar_t m_current_value;
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| 87 | bool m_full;
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| 88 |
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| 89 | public:
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| 90 | // make composible buy using templated constructor
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| 91 | template<class T>
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| 92 | wchar_from_mb(BOOST_PFTO_WRAPPER(T) start) :
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| 93 | super_t(Base(BOOST_MAKE_PFTO_WRAPPER(static_cast<T>(start)))),
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| 94 | m_full(false)
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| 95 | {}
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| 96 | // intel 7.1 doesn't like default copy constructor
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| 97 | wchar_from_mb(const wchar_from_mb & rhs) :
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| 98 | super_t(rhs.base_reference()),
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| 99 | m_full(rhs.m_full)
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| 100 | {}
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| 101 | };
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| 102 |
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| 103 | template<class Base>
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| 104 | wchar_t wchar_from_mb<Base>::drain(){
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| 105 | char buffer[9];
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| 106 | char * bptr = buffer;
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| 107 | char val;
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| 108 | for(std::size_t i = 0; i++ < (unsigned)MB_CUR_MAX;){
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| 109 | val = * this->base_reference();
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| 110 | *bptr++ = val;
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| 111 | int result = std::mblen(buffer, i);
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| 112 | if(-1 != result)
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| 113 | break;
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| 114 | ++(this->base_reference());
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| 115 | }
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| 116 | wchar_t retval;
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| 117 | int result = std::mbtowc(& retval, buffer, MB_CUR_MAX);
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| 118 | if(0 >= result)
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| 119 | boost::throw_exception(iterators::dataflow_exception(
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| 120 | iterators::dataflow_exception::invalid_conversion
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| 121 | ));
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| 122 | return retval;
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| 123 | }
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| 124 |
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| 125 | } // namespace iterators
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| 126 | } // namespace archive
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| 127 | } // namespace boost
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| 128 |
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| 129 | #endif // BOOST_ARCHIVE_ITERATORS_WCHAR_FROM_MB_HPP
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