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expandlib-cmd-lower.h

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00001 
00002 /* This file is part of Expandlib.
00003 
00004   Copyright (C) 2002 Jasper van de Gronde
00005 
00006   This software is provided 'as-is', without any express or implied
00007   warranty.  In no event will the authors be held liable for any damages
00008   arising from the use of this software.
00009 
00010   Permission is granted to anyone to use this software for any purpose,
00011   including commercial applications, and to alter it and redistribute it
00012   freely, subject to the following restrictions:
00013 
00014   1. The origin of this software must not be misrepresented; you must not
00015      claim that you wrote the original software. If you use this software
00016      in a product, an acknowledgment in the product documentation would be
00017      appreciated but is not required.
00018   2. Altered source versions must be plainly marked as such, and must not be
00019      misrepresented as being the original software.
00020   3. This notice may not be removed or altered from any source distribution.
00021 
00022   Jasper van de Gronde th.v.d.gronde@hccnet.nl
00023 
00024 */
00025 
00030 #ifndef EXPANDLIB_CMD_LOWER_H_INCLUDED
00031 #define EXPANDLIB_CMD_LOWER_H_INCLUDED
00032 
00033 #include <locale>
00034 
00035 #include "expandlib-cmd.h"
00036 
00037 namespace expander { // *** Start of namespace
00038 
00040 
00044     template<
00045         // Used for the expandable string (and the expanded string)
00046         class StringType = ::std::string
00047         >
00048     class expcmd_lower : public expandcmd<StringType> {
00049     protected:
00051         const std::locale loc;
00052 
00053     public:
00055 
00058         expcmd_lower(expandable<StringType> * const eobj) : expandcmd<StringType>(eobj, _T("lower")), loc("") {};
00059 
00060         virtual void operator()(StringType &dest, const FParamVectorType &params, const FVarMapType &vars, ExpandResultsType &results) const
00061         {
00062             if ( params.size() == 1 ) {
00063                 const StringType::iterator u=dest.end();
00064                 expobj->expand(dest, params[0], vars, results);
00065 
00066                 std::use_facet< std::ctype<StringType::value_type> >(loc).tolower(u, dest.end());
00067             } else {
00068                 throw expand_error(_T("expcmd_lower"),_T("Parameter error"));
00069             }
00070         }
00071     };
00072 
00073 } // *** End of namespace
00074 
00075 #endif //EXPANDLIB_CMD_LOWER_H_INCLUDED

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