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Diffstat (limited to 'src/third_party/boost-1.60.0/libs/serialization/src/codecvt_null.cpp')
-rw-r--r-- | src/third_party/boost-1.60.0/libs/serialization/src/codecvt_null.cpp | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/src/third_party/boost-1.60.0/libs/serialization/src/codecvt_null.cpp b/src/third_party/boost-1.60.0/libs/serialization/src/codecvt_null.cpp new file mode 100644 index 00000000000..86ece4ad94e --- /dev/null +++ b/src/third_party/boost-1.60.0/libs/serialization/src/codecvt_null.cpp @@ -0,0 +1,83 @@ +/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8 +// codecvt_null.cpp + +// Copyright (c) 2004 Robert Ramey, Indiana University (garcia@osl.iu.edu) +// Andrew Lumsdaine, Indiana University (lums@osl.iu.edu). +// Use, modification and distribution is subject to the Boost Software +// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at +// http://www.boost.org/LICENSE_1_0.txt) + +#define BOOST_WARCHIVE_SOURCE +#include <boost/archive/codecvt_null.hpp> + +// codecvt implementation for passing wchar_t objects to char output +// without any translation whatever. Used to implement binary output +// of wchar_t objects. + +namespace boost { +namespace archive { + +BOOST_WARCHIVE_DECL std::codecvt_base::result +codecvt_null<wchar_t>::do_out( + std::mbstate_t & /*state*/, + const wchar_t * first1, + const wchar_t * last1, + const wchar_t * & next1, + char * first2, + char * last2, + char * & next2 +) const { + while(first1 != last1){ + // Per std::22.2.1.5.2/2, we can store no more that + // last2-first2 characters. If we need to more encode + // next internal char type, return 'partial'. + if(static_cast<int>(sizeof(wchar_t)) > (last2 - first2)){ + next1 = first1; + next2 = first2; + return std::codecvt_base::partial; + } + * reinterpret_cast<wchar_t *>(first2) = * first1++; + first2 += sizeof(wchar_t); + + } + next1 = first1; + next2 = first2; + return std::codecvt_base::ok; +} + +BOOST_WARCHIVE_DECL std::codecvt_base::result +codecvt_null<wchar_t>::do_in( + std::mbstate_t & /*state*/, + const char * first1, + const char * last1, + const char * & next1, + wchar_t * first2, + wchar_t * last2, + wchar_t * & next2 +) const { + // Process input characters until we've run of them, + // or the number of remaining characters is not + // enough to construct another output character, + // or we've run out of place for output characters. + while(first2 != last2){ + // Have we converted all input characters? + // Return with 'ok', if so. + if (first1 == last1) + break; + // Do we have less input characters than needed + // for a single output character? + if(static_cast<int>(sizeof(wchar_t)) > (last1 - first1)){ + next1 = first1; + next2 = first2; + return std::codecvt_base::partial; + } + *first2++ = * reinterpret_cast<const wchar_t *>(first1); + first1 += sizeof(wchar_t); + } + next1 = first1; + next2 = first2; + return std::codecvt_base::ok; +} + +} // namespace archive +} // namespace boost |