C++ (Cpp) codecvt::in Examples

Example #1

File: code_conversion.cpp Project: avasopht/boost_1_55_0-llvm

 inline std::codecvt_base::result convert(
     std::codecvt< LocalCharT, char, std::mbstate_t > const& fac,
     std::mbstate_t& state,
     const char*& pSrcBegin,
     const char* pSrcEnd,
     LocalCharT*& pDstBegin,
     LocalCharT* pDstEnd)
 {
     return fac.in(state, pSrcBegin, pSrcEnd, pSrcBegin, pDstBegin, pDstEnd, pDstBegin);
 }

Example #2

File: codecvt_cast.hpp Project: jeromewang-github/asio_samples

const std::basic_string<CharType> in(
    const std::basic_string<Byte>& external_str,
    const std::codecvt<CharType, Byte, mbstate_t>& codecvt)
{
  typedef std::basic_string<CharType> wstring;
  typedef std::basic_string<Byte>     string;
  typedef std::codecvt<CharType, Byte, mbstate_t> codecvt_type;

  typename string::size_type external_str_size = external_str.length();
  const Byte* first_external = external_str.data();
  const Byte* last_external  = first_external + external_str_size;
  const Byte* next_external  = last_external;

  wstring internal_str;

  // Zero initialized
  typename codecvt_type::state_type state;
  std::memset(&state, 0, sizeof(state));

  typename wstring::size_type out_buf_size =
      static_cast<typename wstring::size_type>(
          codecvt.length(state, first_external, last_external,
              internal_str.max_size()));

#if defined(MA_USE_CXX11_STDLIB_MEMORY)
  detail::unique_ptr<CharType[]> out_buf(new CharType[out_buf_size]);
#else
  detail::scoped_array<CharType> out_buf(new CharType[out_buf_size]);
#endif

  CharType* first_internal = out_buf.get();
  CharType* last_internal  = first_internal + out_buf_size;
  CharType* next_internal  = first_internal;

  typename codecvt_type::result r = codecvt.in(state,
      first_external, last_external, next_external,
      first_internal, last_internal, next_internal);

  if (codecvt_type::ok == r)
  {
    internal_str.assign(first_internal, last_internal);
  }
  else if (codecvt_type::noconv == r)
  {
    internal_str.assign(reinterpret_cast<const CharType*>(first_external),
        reinterpret_cast<const CharType*>(last_external));
  }
  else
  {
    boost::throw_exception(bad_conversion());
  }

  return internal_str;
}

Example #3

File: base.hpp Project: dmlys/extlib

			void from_bytes_step(const std::codecvt<CvtTypes...> & cvt, typename make_from_bytes_context<std::codecvt<CvtTypes...>>::type & ctx)
			{
				ctx.res = cvt.in(ctx.state,
				                 ctx.from_beg, ctx.from_end, ctx.from_stopped,
				                 ctx.to_beg, ctx.to_end, ctx.to_stopped);

				if (ctx.res == std::codecvt_base::partial) {
					// cvt.length returns 0 on intern_char non empty buffer,
					// it can't convert from input - input is partial
					ctx.is_partial_input = cvt.length(ctx.state, ctx.from_stopped, ctx.from_end, 1) == 0;
				}
			}

Example #4

File: codecvt_cast.hpp Project: 0aps/Legacy-Code

const std::basic_string<CharType> in(
    const std::basic_string<Byte>& external_str, 
    const std::codecvt<CharType, Byte, mbstate_t>& codecvt)
{
  typedef std::basic_string<CharType> wstring;
  typedef std::basic_string<Byte> string;
  typedef std::codecvt<CharType, Byte, mbstate_t> codecvt_type;

  typename string::size_type external_str_size = external_str.length();
  const Byte* first_external = external_str.data();
  const Byte* last_external  = first_external + external_str_size;
  const Byte* next_external  = last_external;

  wstring internal_str;

  typename codecvt_type::state_type state(0);
  typename wstring::size_type out_buf_size = codecvt.length(state,
      first_external, last_external, internal_str.max_size());
  
  boost::scoped_array<CharType> out_buf(new CharType[out_buf_size]);

  CharType* first_internal = out_buf.get();
  CharType* last_internal  = first_internal + out_buf_size;
  CharType* next_internal  = first_internal;

  typename codecvt_type::result r = codecvt.in(state,
      first_external, last_external, next_external,
      first_internal, last_internal, next_internal);

  if (codecvt_type::ok != r)
  {
    boost::throw_exception(bad_conversion());
  }
  else if (codecvt_type::noconv == r)
  {
    internal_str.assign(reinterpret_cast<const CharType*>(first_external),
        reinterpret_cast<const CharType*>(last_external));
  }
  else 
  {
    internal_str.assign(first_internal, last_internal);
  }

  return internal_str;
}