| Line 16... |
Line 16... |
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typedef std::vector<struct argument_t*> arg_vector_t;
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typedef std::vector<struct argument_t*> arg_vector_t;
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struct argument_t {
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struct argument_t {
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std::string short_name, long_name;
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std::string short_name, long_name;
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typedef enum { integer, text, flag } arg_type;
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typedef enum { integer, text, flag, real } arg_type;
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arg_type type;
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arg_type type;
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std::string description;
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std::string description;
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// possible states
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// possible states
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int integer_value;
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int integer_value;
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std::string string_value;
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std::string string_value;
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float real_value;
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bool state, req;
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bool state, req;
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argument_t( arg_vector_t& av, const char* long_name, arg_type type,
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argument_t( arg_vector_t& av, const char* long_name, arg_type type,
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const char* desc, bool required=false )
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const char* desc="", bool required=false )
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: long_name(long_name), type( type ), description( desc ),
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: long_name(long_name), type( type ), description( desc ),
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req(required), state(false), integer_value(0)
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req(required), state(false), integer_value(0), real_value(0)
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{
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{
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if( !this->long_name.empty() ) {
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if( !this->long_name.empty() ) {
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this->short_name = "-" + this->long_name.substr(0,1);
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this->short_name = "-" + this->long_name.substr(0,1);
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this->long_name = "--" + this->long_name;
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this->long_name = "--" + this->long_name;
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}
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}
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| Line 50... |
Line 51... |
void throw_error( std::string x ) /*throw const char**/ { throw x.c_str(); }
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void throw_error( std::string x ) /*throw const char**/ { throw x.c_str(); }
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Args( int argc, char *argv[], arg_vector_t& legal_args ) //throw const char *
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Args( int argc, char *argv[], arg_vector_t& legal_args ) //throw const char *
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: legal_args( legal_args ),
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: legal_args( legal_args ),
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help_arg( legal_args, "help", argument_t::flag, "Display usage information")
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help_arg( legal_args, "help", argument_t::flag, "Display usage information")
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{
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{
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//std::copy( legal_args.begin(), legal_args.cnd(), legal_args.begin() );
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if( argc== 1 ) help_arg.set(); // show help if there are no args.
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// look for default argument
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// look for default argument
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def_arg=NULL;
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def_arg=NULL;
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for( int j=0; j<legal_args.size(); j++ ) {
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for( int j=0; j<legal_args.size(); j++ ) {
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if ( legal_args[j]->short_name.empty() && legal_args[j]->long_name.empty() )
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if ( legal_args[j]->short_name.empty() && legal_args[j]->long_name.empty() )
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if( def_arg==NULL ) def_arg = legal_args[j];
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if( def_arg==NULL ) def_arg = legal_args[j];
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| Line 85... |
Line 84... |
a.integer_value = atoi(argv[k]);
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a.integer_value = atoi(argv[k]);
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a.set();
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a.set();
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matched=true;
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matched=true;
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continue;
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continue;
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}
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}
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if( a.type == argument_t::real ) {
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k++;
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if( k>=argc ) throw_error("Expecting input after "+a.long_name+" param");
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a.real_value = atof(argv[k]);
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a.set();
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matched=true;
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continue;
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}
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}
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}
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}
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}
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if( !matched && def_arg!=NULL )
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if( !matched && def_arg!=NULL )
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if( def_arg->state )
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if( def_arg->state )
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throw_error( "Unknown parameter " + std::string(argv[k] ));
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throw_error( "Unknown parameter " + std::string(argv[k] ));
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| Line 108... |
Line 115... |
else if( !a.short_name.empty() ) pname=a.short_name;
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else if( !a.short_name.empty() ) pname=a.short_name;
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throw_error("Parameter "+pname+" is required.");
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throw_error("Parameter "+pname+" is required.");
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}
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}
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}
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}
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}
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}
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bool help_request() { if( help_arg.state ) show_help(); return help_arg.state; }
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bool help_request() { if( help_arg.is_set() ) show_help(); return help_arg.is_set(); }
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std::string brackets( const argument_t& a, std::string s ) {
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std::string brackets( const argument_t& a, std::string s ) {
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return a.req ? "<"+s+">" : "["+s+"]";
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return a.req ? "<"+s+">" : "["+s+"]";
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}
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}
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void show_help() {
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void show_help() {
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std::cout << "Usage: " << program_name << " ";
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std::cout << "Usage: " << program_name << " ";
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| Line 126... |
Line 133... |
std::string aux;
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std::string aux;
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if( !a.long_name.empty() ) aux = a.long_name;
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if( !a.long_name.empty() ) aux = a.long_name;
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if( !a.long_name.empty() && !a.long_name.empty() ) aux += " | ";
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if( !a.long_name.empty() && !a.long_name.empty() ) aux += " | ";
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if( !a.short_name.empty() ) aux+= a.short_name;
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if( !a.short_name.empty() ) aux+= a.short_name;
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std::cout << brackets( a, aux );
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std::cout << brackets( a, aux );
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switch( a.type ) {
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case argument_t::integer: std::cout << " followed by integer number. "; break;
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case argument_t::real : std::cout << " followed by real number. "; break;
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case argument_t::text : std::cout << " followed by string. "; break;
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}
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if( !a.description.empty() ) std::cout << ": " << a.description;
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if( !a.description.empty() ) std::cout << ": " << a.description;
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std::cout << "\n";
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std::cout << "\n";
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}
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}
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}
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}
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};
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};
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