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expandlib-cmd-ltrim.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_LTRIM_H_INCLUDED
00031 #define EXPANDLIB_CMD_LTRIM_H_INCLUDED
00032 
00033 #include "expandlib-cmd.h"
00034 
00035 namespace expander { // *** Start of namespace
00036 
00038 
00042     template<
00043         // Used for the expandable string (and the expanded string)
00044         class StringType = ::std::string
00045         >
00046     class expcmd_ltrim : public expandcmd<StringType> {
00047     protected:
00048     public:
00050 
00053         expcmd_ltrim(expandable<StringType> * const eobj) : expandcmd<StringType>(eobj, _T("ltrim")) {};
00054 
00056         virtual void operator()(StringType &dest, const FParamVectorType &params, const FVarMapType &vars, ExpandResultsType &results) const
00057         {
00058             if ( params.size() == 2 ) {
00059                 StringType d;
00060                 expobj->expand(d, params[0], vars, results);
00061 
00062                 dest.append(d.begin()+d.find_first_not_of(params[1]), d.end());
00063             } else {
00064                 throw expand_error(_T("expcmd_ltrim"),_T("Parameter error"));
00065             }
00066         }
00067     };
00068 
00069 } // *** End of namespace
00070 
00071 #endif //EXPANDLIB_CMD_LTRIM_H_INCLUDED

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