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 { } 00050 00051 codecvt<char, char, mbstate_t>:: 00052 ~codecvt() 00053 { } 00054 00055 codecvt_base::result 00056 codecvt<char, char, mbstate_t>:: 00057 do_out(state_type&, const intern_type* __from, 00058 const intern_type*, const intern_type*& __from_next, 00059 extern_type* __to, extern_type*, 00060 extern_type*& __to_next) const 00061 { 00062 // _GLIBCPP_RESOLVE_LIB_DEFECTS 00063 // According to the resolution of DR19, "If returns noconv [...] 00064 // there are no changes to the values in [to, to_limit)." 00065 __from_next = __from; 00066 __to_next = __to; 00067 return noconv; 00068 } 00069 00070 codecvt_base::result 00071 codecvt<char, char, mbstate_t>:: 00072 do_unshift(state_type&, extern_type* __to, 00073 extern_type*, extern_type*& __to_next) const 00074 { 00075 __to_next = __to; 00076 return noconv; 00077 } 00078 00079 codecvt_base::result 00080 codecvt<char, char, mbstate_t>:: 00081 do_in(state_type&, const extern_type* __from, 00082 const extern_type*, const extern_type*& __from_next, 00083 intern_type* __to, intern_type*, 00084 intern_type*& __to_next) const 00085 { 00086 // _GLIBCPP_RESOLVE_LIB_DEFECTS 00087 // According to the resolution of DR19, "If returns noconv [...] 00088 // there are no changes to the values in [to, to_limit)." 00089 __from_next = __from; 00090 __to_next = __to; 00091 return noconv; 00092 } 00093 00094 int 00095 codecvt<char, char, mbstate_t>:: 00096 do_encoding() const throw() 00097 { return 1; } 00098 00099 bool 00100 codecvt<char, char, mbstate_t>:: 00101 do_always_noconv() const throw() 00102 { return true; } 00103 00104 int 00105 codecvt<char, char, mbstate_t>:: 00106 do_length (const state_type&, const extern_type* __from, 00107 const extern_type* __end, size_t __max) const 00108 { return min(__max, static_cast<size_t>(__end - __from)); } 00109 00110 int 00111 codecvt<char, char, mbstate_t>:: 00112 do_max_length() const throw() 00113 { return 1; } 00114 00115 #ifdef _GLIBCPP_USE_WCHAR_T 00116 // codecvt<wchar_t, char, mbstate_t> required specialization 00117 codecvt<wchar_t, char, mbstate_t>:: 00118 codecvt(size_t __refs) 00119 : __codecvt_abstract_base<wchar_t, char, mbstate_t>(__refs) 00120 { } 00121 00122 codecvt<wchar_t, char, mbstate_t>:: 00123 ~codecvt() 00124 { } 00125 00126 codecvt_base::result 00127 codecvt<wchar_t, char, mbstate_t>:: 00128 do_unshift(state_type&, extern_type* __to, 00129 extern_type*, extern_type*& __to_next) const 00130 { 00131 __to_next = __to; 00132 return noconv; 00133 } 00134 00135 int 00136 codecvt<wchar_t, char, mbstate_t>:: 00137 do_encoding() const throw() 00138 { return sizeof(wchar_t); } 00139 00140 bool 00141 codecvt<wchar_t, char, mbstate_t>:: 00142 do_always_noconv() const throw() 00143 { return false; } 00144 00145 int 00146 codecvt<wchar_t, char, mbstate_t>:: 00147 do_length(const state_type&, const extern_type* __from, 00148 const extern_type* __end, size_t __max) const 00149 { return min(__max, static_cast<size_t>(__end - __from)); } 00150 00151 int 00152 codecvt<wchar_t, char, mbstate_t>:: 00153 do_max_length() const throw() 00154 { return 1; } 00155 #endif // _GLIBCPP_USE_WCHAR_T 00156 } // namespace std

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