/* Basic History plugin Copyright (C) 2011-2012 Krzysztof Kral This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation version 2 of the License. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . */ #pragma once template class codecvt_CodePage : public std::codecvt<_Elem, char, mbstate_t> { private: UINT codePage; public: typedef std::codecvt<_Elem, char, mbstate_t> _Mybase; typedef typename _Mybase::result result; typedef char _Byte; typedef _Elem intern_type; typedef _Byte extern_type; typedef mbstate_t state_type; explicit codecvt_CodePage(UINT _codePage) : _Mybase(0), codePage(_codePage) { // construct with ref count } virtual ~codecvt_CodePage() { // destroy the object } protected: virtual result do_in(mbstate_t&, const _Byte *, const _Byte *, const _Byte *&, _Elem *, _Elem *, _Elem *&) const { // convert bytes [_First1, _Last1) to [_First2, _Last) return (_Mybase::error); // not implemented } virtual result do_out(mbstate_t&, const _Elem *_First1, const _Elem *_Last1, const _Elem *& _Mid1, _Byte *_First2, _Byte *_Last2, _Byte *& _Mid2) const { // convert [_First1, _Last1) to bytes [_First2, _Last) _Mid1 = _First1; _Mid2 = _First2; int conv = WideCharToMultiByte(codePage, 0, _First1, _Last1 - _First1, _First2, _Last2 - _First2, NULL, NULL); if (conv == 0) { if (GetLastError() == ERROR_INSUFFICIENT_BUFFER) return (_Mybase::partial); else return (_Mybase::error); } else { _Mid1 = _Last1; _Mid2 = _First2 + conv; } return (_Mybase::ok); } virtual result do_unshift(mbstate_t&, _Byte *_First2, _Byte *, _Byte *& _Mid2) const { // generate bytes to return to default shift state _Mid2 = _First2; return (_Mybase::ok); } virtual int do_length(const mbstate_t&, const _Byte *, const _Byte *, size_t _Count) const throw() { // return min(_Count, converted length of bytes [_First1, _Last1)) return (int)_Count; // not implemented } virtual bool do_always_noconv() const throw() { // return true if conversions never change input return (false); } virtual int do_max_length() const throw() { // return maximum length required for a conversion return 6; } virtual int do_encoding() const throw() { // return length of code sequence (from codecvt) return 0; // -1 => state dependent, 0 => varying length } };