// Copyright (C) 2005 Davis E. King (davis@dlib.net) // License: Boost Software License See LICENSE.txt for the full license. #ifndef DLIB_CMD_LINE_PARSER_PRINt_1_ #define DLIB_CMD_LINE_PARSER_PRINt_1_ #include "cmd_line_parser_print_abstract.h" #include "../algs.h" #include "../string.h" #include <iostream> #include <string> #include <sstream> namespace dlib { template < typename clp_base > class cmd_line_parser_print_1 : public clp_base { public: void print_options ( std::basic_ostream<typename clp_base::char_type>& out ); }; template < typename clp_base > inline void swap ( cmd_line_parser_print_1<clp_base>& a, cmd_line_parser_print_1<clp_base>& b ) { a.swap(b); } // ---------------------------------------------------------------------------------------- // ---------------------------------------------------------------------------------------- // member function definitions // ---------------------------------------------------------------------------------------- // ---------------------------------------------------------------------------------------- template < typename clp_base > void cmd_line_parser_print_1<clp_base>:: print_options ( std::basic_ostream<typename clp_base::char_type>& out ) { typedef typename clp_base::char_type ct; typedef std::basic_string<ct> string; typedef typename string::size_type size_type; try { out << _dT(ct,"Options:"); size_type max_len = 0; this->reset(); // this loop here is just the bottom loop but without the print statements. // I'm doing this to figure out what len should be. while (this->move_next()) { size_type len = 0; len += 3; if (this->element().name().size() > 1) { ++len; } len += this->element().name().size(); if (this->element().number_of_arguments() == 1) { len += 6; } else { for (unsigned long i = 0; i < this->element().number_of_arguments(); ++i) { len += 7; if (i+1 > 9) ++len; } } len += 3; if (len < 33) max_len = std::max(max_len,len); } this->reset(); while (this->move_next()) { size_type len = 0; out << _dT(ct,"\n -"); len += 3; if (this->element().name().size() > 1) { out << _dT(ct,"-"); ++len; } out << this->element().name(); len += this->element().name().size(); if (this->element().number_of_arguments() == 1) { out << _dT(ct," <arg>"); len += 6; } else { for (unsigned long i = 0; i < this->element().number_of_arguments(); ++i) { out << _dT(ct," <arg") << i+1 << _dT(ct,">"); len += 7; if (i+1 > 9) ++len; } } out << " "; len += 3; while (len < max_len) { ++len; out << " "; } const unsigned long ml = static_cast<unsigned long>(max_len); // now print the description but make it wrap around nicely if it // is to long to fit on one line. if (len <= max_len) out << wrap_string(this->element().description(),0,ml); else out << "\n" << wrap_string(this->element().description(),ml,ml); } this->reset(); } catch (...) { this->reset(); throw; } } // ---------------------------------------------------------------------------------------- } #endif // DLIB_CMD_LINE_PARSER_PRINt_1_