-/* $Id$
-
-This file is part of libmspcore
-Copyright © 2006-2009, 2011 Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
+#include <msp/strings/format.h>
#include "getopt.h"
using namespace std;
namespace Msp {
+GetOpt::GetOpt():
+ help(false)
+{
+ add_option("help", help, NO_ARG).set_help("Displays this help");
+}
+
GetOpt::~GetOpt()
{
for(list<OptBase *>::iterator i=opts.begin(); i!=opts.end(); ++i)
delete *i;
}
+GetOpt::OptBase &GetOpt::add_option(OptBase *opt)
+{
+ for(list<OptBase *>::iterator i=opts.begin(); i!=opts.end(); )
+ {
+ if((*i)->get_short()==opt->get_short() || (*i)->get_long()==opt->get_long())
+ {
+ delete *i;
+ opts.erase(i++);
+ }
+ else
+ ++i;
+ }
+
+ opts.push_back(opt);
+ return *opts.back();
+}
+
GetOpt::OptBase &GetOpt::get_option(char s)
{
for(list<OptBase *>::iterator i=opts.begin(); i!=opts.end(); ++i)
if((*i)->get_short()==s)
return **i;
- throw UsageError(string("Unknown option -")+s);
+ throw usage_error(string("Unknown option -")+s);
}
GetOpt::OptBase &GetOpt::get_option(const string &l)
for(list<OptBase *>::iterator i=opts.begin(); i!=opts.end(); ++i)
if((*i)->get_long()==l)
return **i;
- throw UsageError(string("Unknown option --")+l);
+ throw usage_error(string("Unknown option --")+l);
}
void GetOpt::operator()(unsigned argc, const char *const *argv)
{
- unsigned i = 1;
- for(; i<argc;)
+ try
{
- if(argv[i][0]=='-')
+ unsigned i = 1;
+ for(; i<argc;)
{
- if(argv[i][1]=='-')
+ if(argv[i][0]=='-')
{
- if(!argv[i][2])
- break;
-
- i += process_long(argv+i);
+ if(argv[i][1]=='-')
+ {
+ if(!argv[i][2])
+ break;
+
+ i += process_long(argv+i);
+ }
+ else
+ i += process_short(argv+i);
}
else
- i += process_short(argv+i);
+ args.push_back(argv[i++]);
}
- else
- args.push_back(argv[i++]);
+
+ for(; i<argc; ++i)
+ args.push_back(argv[i]);
}
-
- for(; i<argc; ++i)
- args.push_back(argv[i]);
+ catch(const usage_error &e)
+ {
+ throw usage_error(e.what(), "Usage: "+generate_usage(argv[0]));
+ }
+
+ if(help)
+ throw usage_error(string("Help for ")+argv[0]+":", generate_help());
}
unsigned GetOpt::process_long(const char *const *argp)
else if(opt.get_arg_type()==REQUIRED_ARG)
{
if(!argp[1])
- throw UsageError("Premature end of arguments");
+ throw usage_error("--"+string(arg)+" requires an argument");
// Process the next argument as option argument
opt.process(argp[1]);
else if(opt.get_arg_type()==REQUIRED_ARG)
{
if(!argp[1])
- throw UsageError("Premature end of arguments");
+ throw usage_error("-"+string(1, *arg)+" requires an argument");
// Use the next argument as option argument
opt.process(argp[1]);
string GetOpt::generate_usage(const string &argv0) const
{
- ostringstream line;
-
- line<<argv0;
+ string result = argv0;
for(list<OptBase *>::const_iterator i=opts.begin(); i!=opts.end(); ++i)
{
- line<<" [";
+ result += " [";
if((*i)->get_short())
{
- line<<'-'<<(*i)->get_short();
+ result += format("-%c", (*i)->get_short());
if(!(*i)->get_long().empty())
- line<<'|';
+ result += '|';
else if((*i)->get_arg_type()==OPTIONAL_ARG)
- line<<'['<<(*i)->get_metavar()<<']';
+ result += format("[%s]", (*i)->get_metavar());
else if((*i)->get_arg_type()==REQUIRED_ARG)
- line<<' '<<(*i)->get_metavar();
+ result += format(" %s", (*i)->get_metavar());
}
if(!(*i)->get_long().empty())
{
- line<<"--"<<(*i)->get_long();
+ result += format("--%s", (*i)->get_long());
if((*i)->get_arg_type()==OPTIONAL_ARG)
- line<<"[="<<(*i)->get_metavar()<<']';
+ result += format("[=%s]", (*i)->get_metavar());
else if((*i)->get_arg_type()==REQUIRED_ARG)
- line<<'='<<(*i)->get_metavar();
+ result += format("=%s", (*i)->get_metavar());
}
- line<<']';
+ result += ']';
}
- return line.str();
+ return result;
}
string GetOpt::generate_help() const
list<string> switches;
for(list<OptBase *>::const_iterator i=opts.begin(); i!=opts.end(); ++i)
{
- ostringstream swtch;
+ string swtch;
if((*i)->get_short())
{
- swtch<<'-'<<(*i)->get_short();
+ swtch += format("-%c", (*i)->get_short());
if(!(*i)->get_long().empty())
- swtch<<", ";
+ swtch += ", ";
else if((*i)->get_arg_type()==OPTIONAL_ARG)
- swtch<<'['<<(*i)->get_metavar()<<']';
+ swtch += format("[%s]", (*i)->get_metavar());
else if((*i)->get_arg_type()==REQUIRED_ARG)
- swtch<<' '<<(*i)->get_metavar();
+ swtch += format(" %s", (*i)->get_metavar());
}
else if(any_short)
- swtch<<" ";
+ swtch += " ";
if(!(*i)->get_long().empty())
{
- swtch<<"--"<<(*i)->get_long();
+ swtch += format("--%s", (*i)->get_long());
if((*i)->get_arg_type()==OPTIONAL_ARG)
- swtch<<"[="<<(*i)->get_metavar()<<']';
+ swtch += format("[=%s]", (*i)->get_metavar());
else if((*i)->get_arg_type()==REQUIRED_ARG)
- swtch<<'='<<(*i)->get_metavar();
+ swtch += format("=%s", (*i)->get_metavar());
}
- switches.push_back(swtch.str());
- maxw = max(maxw, switches.back().size());
+ switches.push_back(swtch);
+ maxw = max(maxw, swtch.size());
}
string result;
list<string>::const_iterator j = switches.begin();
for(list<OptBase *>::const_iterator i=opts.begin(); i!=opts.end(); ++i, ++j)
- {
- result += " "+*j;
- result += string(maxw+2-j->size(), ' ');
- result += (*i)->get_help();
- result += '\n';
- }
+ result += format(" %s%s%s\n", *j, string(maxw+2-j->size(), ' '), (*i)->get_help());
return result;
}
arg_type(a),
seen_count(0),
metavar("ARG")
-{ }
+{
+ if(lng.empty())
+ throw invalid_argument("empty long option name");
+}
GetOpt::OptBase &GetOpt::OptBase::set_help(const string &h)
{
void GetOpt::OptBase::process()
{
if(arg_type==REQUIRED_ARG)
- throw UsageError("--"+lng+" requires an argument");
+ throw usage_error("--"+lng+" requires an argument");
++seen_count;
store();
void GetOpt::OptBase::process(const string &arg)
{
if(arg_type==NO_ARG)
- throw UsageError("--"+lng+" takes no argument");
+ throw usage_error("--"+lng+" takes no argument");
++seen_count;
store(arg);
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