/usr/include/libpwiz/libraries/boost_aux/boost/nowide/convert.hpp is in libpwiz-dev 3.0.9393-1+b2.
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// Copyright (c) 2012 Artyom Beilis (Tonkikh)
//
// Distributed under 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)
//
#ifndef BOOST_NOWIDE_CONVERT_H_INCLUDED
#define BOOST_NOWIDE_CONVERT_H_INCLUDED
#include <string>
#include <boost/locale/encoding_utf.hpp>
namespace boost {
namespace nowide {
///
/// \brief Template function that converts a buffer of UTF sequence in range [source_begin,source_end)
/// to the output \a buffer of size \a buffer_size.
///
/// In case of success a NUL terminated string returned (buffer), otherwise 0 is returned.
///
/// If there is not enough room in the buffer or the source sequence contains invalid UTF
/// 0 is returned, and the contend of the buffer is undefined.
///
template<typename CharOut,typename CharIn>
CharOut *basic_convert(CharOut *buffer,size_t buffer_size,CharIn const *source_begin,CharIn const *source_end)
{
CharOut *rv = buffer;
if(buffer_size == 0)
return 0;
buffer_size --;
while(source_begin!=source_end) {
using namespace boost::locale::utf;
code_point c = utf_traits<CharIn>::template decode<CharIn const *>(source_begin,source_end);
if(c==illegal || c==incomplete) {
rv = 0;
break;
}
size_t width = utf_traits<CharOut>::width(c);
if(buffer_size < width) {
rv=0;
break;
}
buffer = utf_traits<CharOut>::template encode<CharOut *>(c,buffer);
buffer_size -= width;
}
*buffer++ = 0;
return rv;
}
/// \cond INTERNAL
namespace details {
//
// wcslen defined only in C99... So we will not use it
//
template<typename Char>
Char const *basic_strend(Char const *s)
{
while(*s)
s++;
return s;
}
}
/// \endcond
///
/// Convert NUL terminated UTF source string to NUL terminated \a output string of size at
/// most output_size (including NUL)
///
/// In case of surcess output is returned, if the input sequence is illegal,
/// or there is not enough room NULL is returned
///
inline char *narrow(char *output,size_t output_size,wchar_t const *source)
{
return basic_convert(output,output_size,source,details::basic_strend(source));
}
///
/// Convert UTF text in range [begin,end) to NUL terminated \a output string of size at
/// most output_size (including NUL)
///
/// In case of surcess output is returned, if the input sequence is illegal,
/// or there is not enough room NULL is returned
///
inline char *narrow(char *output,size_t output_size,wchar_t const *begin,wchar_t const *end)
{
return basic_convert(output,output_size,begin,end);
}
///
/// Convert NUL terminated UTF source string to NUL terminated \a output string of size at
/// most output_size (including NUL)
///
/// In case of surcess output is returned, if the input sequence is illegal,
/// or there is not enough room NULL is returned
///
inline wchar_t *widen(wchar_t *output,size_t output_size,char const *source)
{
return basic_convert(output,output_size,source,details::basic_strend(source));
}
///
/// Convert UTF text in range [begin,end) to NUL terminated \a output string of size at
/// most output_size (including NUL)
///
/// In case of surcess output is returned, if the input sequence is illegal,
/// or there is not enough room NULL is returned
///
inline wchar_t *widen(wchar_t *output,size_t output_size,char const *begin,char const *end)
{
return basic_convert(output,output_size,begin,end);
}
///
/// Convert between Wide - UTF-16/32 string and UTF-8 string.
///
/// boost::locale::conv::conversion_error is thrown in a case of a error
///
inline std::string narrow(wchar_t const *s)
{
return boost::locale::conv::utf_to_utf<char>(s);
}
///
/// Convert between UTF-8 and UTF-16 string, implemented only on Windows platform
///
/// boost::locale::conv::conversion_error is thrown in a case of a error
///
inline std::wstring widen(char const *s)
{
return boost::locale::conv::utf_to_utf<wchar_t>(s);
}
///
/// Convert between Wide - UTF-16/32 string and UTF-8 string
///
/// boost::locale::conv::conversion_error is thrown in a case of a error
///
inline std::string narrow(std::wstring const &s)
{
return boost::locale::conv::utf_to_utf<char>(s);
}
///
/// Convert between UTF-8 and UTF-16 string, implemented only on Windows platform
///
/// boost::locale::conv::conversion_error is thrown in a case of a error
///
inline std::wstring widen(std::string const &s)
{
return boost::locale::conv::utf_to_utf<wchar_t>(s);
}
} // nowide
} // namespace boost
#endif
///
// vim: tabstop=4 expandtab shiftwidth=4 softtabstop=4
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