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00001 // ======================================================================== // 00002 // // 00003 // File : FileFilter.h // 00004 // Purpose : Easy to use interface for programs which act as filter. // 00005 // Time-stamp: <Wed Nov/13/2002 05:43 MET Coder@ReallySoft.de> // 00006 // // 00007 // (C) May 2002 by Ralf Westram // 00008 // // 00009 // Permission to use, copy, modify, distribute and sell this software // 00010 // and its documentation for any purpose is hereby granted without fee, // 00011 // provided that the above copyright notice appear in all copies and // 00012 // that both that copyright notice and this permission notice appear // 00013 // in supporting documentation. // 00014 // // 00015 // Ralf Westram makes no representations about the suitability of this // 00016 // software for any purpose. It is provided "as is" without express or // 00017 // implied warranty. // 00018 // // 00019 // ======================================================================== // 00020 00021 #ifndef FILEFILTER_H 00022 #define FILEFILTER_H 00023 00024 #ifndef OPTION_H 00025 #include <Option.h> 00026 #endif 00027 #ifndef INPUTFILE_H 00028 #include <InputFile.h> 00029 #endif 00030 00031 namespace rs { 00032 namespace file { 00033 00035 namespace filter { 00036 00037 class FilterArguments { 00038 private: 00039 cmdline::OptionalCmdLineArgument input; 00040 cmdline::OptionalCmdLineArgument output; 00041 cmdline::CmdLineAnnotation arg_info; 00042 00043 public: 00052 FilterArguments(const std::string& input_type, const std::string& output_type); 00053 virtual ~FilterArguments() {} 00054 00058 cmdline::OptionalCmdLineArgument& get_input() { return input; } 00059 00063 cmdline::OptionalCmdLineArgument& get_output() { return output; } 00064 }; 00065 00066 // ------------------------- 00067 // class FileFilter 00068 // ------------------------- 00069 class FileFilter { 00070 private: 00071 file::InputFile *in; 00072 std::ostream *out; 00073 bool is_stdout; 00074 00075 void init(cmdline::CmdLineArgument& input, cmdline::CmdLineArgument& output); 00076 00077 public: 00078 FileFilter(FilterArguments& filter) { init(filter.get_input(), filter.get_output()); } 00079 FileFilter(cmdline::CmdLineArgument& input, cmdline::CmdLineArgument& output) { init(input, output); } 00080 00081 virtual ~FileFilter() { 00082 delete in; 00083 if (!is_stdout) delete out; 00084 } 00085 00086 bool getLine(std::string& s) { return in->getLine(s); } 00087 void putLine(const std::string& s) { (*out) << s << "\n"; } 00088 }; 00089 00090 }; 00091 }; 00092 }; // end of namespace rs 00093 00094 #else 00095 #error FileFilter.h included twice 00096 #endif // FILEFILTER_H 00097
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