# codecvt.cc

    00001 // Copyright (C) 2000, 2002 Free Software Foundation, Inc.
    00002 //
    00003 // This file is part of the GNU ISO C++ Library.  This library is free
    00004 // software; you can redistribute it and/or modify it under the
    00005 // terms of the GNU General Public License as published by the
    00006 // Free Software Foundation; either version 2, or (at your option)
    00007 // any later version.
    00008
    00009 // This library is distributed in the hope that it will be useful,
    00010 // but WITHOUT ANY WARRANTY; without even the implied warranty of
    00011 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    00012 // GNU General Public License for more details.
    00013
    00014 // You should have received a copy of the GNU General Public License along
    00015 // with this library; see the file COPYING.  If not, write to the Free
    00016 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
    00017 // USA.
    00018
    00019 // As a special exception, you may use this file as part of a free software
    00020 // library without restriction.  Specifically, if other files instantiate
    00021 // templates or use macros or inline functions from this file, or you compile
    00022 // this file and link it with other files to produce an executable, this
    00023 // file does not by itself cause the resulting executable to be covered by
    00024 // the GNU General Public License.  This exception does not however
    00025 // invalidate any other reasons why the executable file might be covered by
    00026 // the GNU General Public License.
    00027
    00028 // Written by Benjamin Kosnik <bkoz@cygnus.com>
    00029
    00030 #include <locale>
    00031
    00032 namespace std
    00033 {
    00034   // Definitions for locale::id of standard facets that are specialized.
    00035  locale::id codecvt<char, char, mbstate_t>::id;
    00036
    00037 #ifdef _GLIBCPP_USE_WCHAR_T
    00038   locale::id codecvt<wchar_t, char, mbstate_t>::id;
    00039 #endif
    00040
    00041 #ifdef _GLIBCPP_USE___ENC_TRAITS
    00042   // Definitions for static const data members of __enc_traits.
    00043   const int __enc_traits::_S_max_size;
    00044 #endif
    00045
    00046   codecvt<char, char, mbstate_t>::
    00047   codecvt(size_t __refs)
    00048   : __codecvt_abstract_base<char, char, mbstate_t>(__refs)
    00049   { _M_c_locale_codecvt = _S_c_locale; }
    00050
    00051   codecvt<char, char, mbstate_t>::
    00052   codecvt(__c_locale __cloc, size_t __refs)
    00053   : __codecvt_abstract_base<char, char, mbstate_t>(__refs)
    00054   { _M_c_locale_codecvt = _S_clone_c_locale(__cloc); }
    00055
    00056   codecvt<char, char, mbstate_t>::
    00057   ~codecvt()
    00058   { _S_destroy_c_locale(_M_c_locale_codecvt); }
    00059
    00060   codecvt_base::result
    00061   codecvt<char, char, mbstate_t>::
    00062   do_out(state_type&, const intern_type* __from,
    00063      const intern_type* __from_end, const intern_type*& __from_next,
    00064      extern_type* __to, extern_type* __to_end,
    00065      extern_type*& __to_next) const
    00066   {
    00067     size_t __len = min(__from_end - __from, __to_end - __to);
    00068     memcpy(__to, __from, __len);
    00069     __from_next = __from;
    00070     __to_next = __to;
    00071     return noconv;
    00072   }
    00073
    00074   codecvt_base::result
    00075   codecvt<char, char, mbstate_t>::
    00076   do_unshift(state_type&, extern_type* __to,
    00077              extern_type*, extern_type*& __to_next) const
    00078   {
    00079     __to_next = __to;
    00080     return noconv;
    00081   }
    00082
    00083   codecvt_base::result
    00084   codecvt<char, char, mbstate_t>::
    00085   do_in(state_type&, const extern_type* __from,
    00086     const extern_type* __from_end, const extern_type*& __from_next,
    00087     intern_type* __to, intern_type* __to_end,
    00088     intern_type*& __to_next) const
    00089   {
    00090     size_t __len = min(__from_end - __from, __to_end - __to);
    00091     memcpy(__to, __from, __len);
    00092     __from_next = __from;
    00093     __to_next = __to;
    00094     return noconv;
    00095   }
    00096
    00097   int
    00098   codecvt<char, char, mbstate_t>::
    00099   do_encoding() const throw()
    00100   { return 1; }
    00101
    00102   bool
    00103   codecvt<char, char, mbstate_t>::
    00104   do_always_noconv() const throw()
    00105   { return true; }
    00106
    00107   int
    00108   codecvt<char, char, mbstate_t>::
    00109   do_length (const state_type&, const extern_type* __from,
    00110          const extern_type* __end, size_t __max) const
    00111   { return min(__max, static_cast<size_t>(__end - __from)); }
    00112
    00113   int
    00114   codecvt<char, char, mbstate_t>::
    00115   do_max_length() const throw()
    00116   { return 1; }
    00117
    00118 #ifdef _GLIBCPP_USE_WCHAR_T
    00119   // codecvt<wchar_t, char, mbstate_t> required specialization
    00120   codecvt<wchar_t, char, mbstate_t>::
    00121   codecvt(size_t __refs)
    00122   : __codecvt_abstract_base<wchar_t, char, mbstate_t>(__refs)
    00123   { _M_c_locale_codecvt = _S_c_locale; }
    00124
    00125   codecvt<wchar_t, char, mbstate_t>::
    00126   codecvt(__c_locale __cloc, size_t __refs)
    00127   : __codecvt_abstract_base<wchar_t, char, mbstate_t>(__refs)
    00128   { _M_c_locale_codecvt = _S_clone_c_locale(__cloc); }
    00129
    00130   codecvt<wchar_t, char, mbstate_t>::
    00131   ~codecvt()
    00132   { _S_destroy_c_locale(_M_c_locale_codecvt); }
    00133
    00134   codecvt_base::result
    00135   codecvt<wchar_t, char, mbstate_t>::
    00136   do_unshift(state_type&, extern_type* __to,
    00137          extern_type*, extern_type*& __to_next) const
    00138   {
    00139     __to_next = __to;
    00140     return noconv;
    00141   }
    00142
    00143   int
    00144   codecvt<wchar_t, char, mbstate_t>::
    00145   do_encoding() const throw()
    00146   { return sizeof(wchar_t); }
    00147
    00148   bool
    00149   codecvt<wchar_t, char, mbstate_t>::
    00150   do_always_noconv() const throw()
    00151   { return false; }
    00152
    00153   int
    00154   codecvt<wchar_t, char, mbstate_t>::
    00155   do_length(const state_type&, const extern_type* __from,
    00156         const extern_type* __end, size_t __max) const
    00157   { return min(__max, static_cast<size_t>(__end - __from)); }
    00158
    00159   int
    00160   codecvt<wchar_t, char, mbstate_t>::
    00161   do_max_length() const throw()
    00162   { return 1; }
    00163 #endif //  _GLIBCPP_USE_WCHAR_T
    00164 } // namespace std