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https://github.com/jezhiggins/arabica
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63 lines
2 KiB
C++
63 lines
2 KiB
C++
//---------------------------------------------------------------------------
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// $Id$
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//---------------------------------------------------------------------------
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#include "utf16utf8codecvt.h"
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#include "impl/ucs2_utf8.h"
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//---------------------------------------------------------------------------
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// This facet converts from wide chars to char using the
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// FSS-UTF (UCS2) encoding.
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//
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std::codecvt_base::result utf16utf8codecvt::do_out(std::mbstate_t& /* state */,
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const char* from,
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const char* from_end,
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const char*& from_next,
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wchar_t* to,
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wchar_t* to_limit,
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wchar_t*& to_next) const
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{
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return ArabicaInternal::utf8_2_ucs2(from, from_end, from_next, to, to_limit, to_next);
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} // do_out
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std::codecvt_base::result utf16utf8codecvt::do_in(std::mbstate_t& /* state */,
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const wchar_t* from,
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const wchar_t* from_end,
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const wchar_t*& from_next,
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char* to,
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char* to_limit,
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char*& to_next) const
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{
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return ArabicaInternal::ucs2_2_utf8(from, from_end, from_next, to, to_limit, to_next);
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} // do_in
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std::codecvt_base::result utf16utf8codecvt::do_unshift(std::mbstate_t& /* state */,
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wchar_t* to,
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wchar_t* /* to_limit */,
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wchar_t*& to_next) const
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{
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to_next = to;
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return noconv;
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} // do_unshift
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int utf16utf8codecvt::do_length(const std::mbstate_t&,
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const wchar_t* from,
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const wchar_t* end,
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size_t max) const
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{
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size_t count(0);
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const wchar_t* from_next = from;
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while((from_next < end) && (count < max))
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{
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if(*from_next > 0x7FF)
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++count;
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if(*from_next > 0x7F)
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++count;
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++count;
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++from_next;
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} // while
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return (from_next-from);
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} // do_length
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// end of file
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