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// license:GPL-2.0+
// copyright-holders:Couriersud
/*
* poptions.cpp
*
*/
#include "poptions.h"
namespace plib {
/***************************************************************************
Options
***************************************************************************/
option::option()
: m_short(""), m_long(""), m_help(""), m_has_argument(false)
{}
option::option(options &parent, pstring ashort, pstring along, pstring help, bool has_argument)
: m_short(ashort), m_long(along), m_help(help), m_has_argument(has_argument)
{
parent.register_option(this);
}
option::~option()
{
}
int option_str::parse(pstring argument)
{
m_val = argument;
return 0;
}
int option_str_limit::parse(pstring argument)
{
if (plib::container::contains(m_limit, argument))
{
m_val = argument;
return 0;
}
else
return 1;
}
int option_bool::parse(ATTR_UNUSED pstring argument)
{
m_val = true;
return 0;
}
int option_double::parse(pstring argument)
{
bool err = false;
m_val = argument.as_double(&err);
return (err ? 1 : 0);
}
options::options()
{
}
options::options(option *o[])
{
int i=0;
while (o[i] != nullptr)
{
m_opts.push_back(o[i]);
i++;
}
}
options::~options()
{
m_opts.clear();
}
void options::register_option(option *opt)
{
m_opts.push_back(opt);
}
int options::parse(int argc, char *argv[])
{
m_app = argv[0];
for (int i=1; i<argc; )
{
pstring arg(argv[i]);
option *opt = nullptr;
pstring opt_arg;
bool has_equal_arg = false;
if (arg.startsWith("--"))
{
auto v = pstring_vector_t(arg.substr(2),"=");
opt = getopt_long(v[0]);
has_equal_arg = (v.size() > 1);
if (has_equal_arg) opt_arg = v[1];
}
else if (arg.startsWith("-"))
{
opt = getopt_short(arg.substr(1));
}
else
return i;
if (opt == nullptr)
return i;
if (opt->has_argument())
{
if (has_equal_arg)
{
if (opt->parse(opt_arg) != 0)
return i;
}
else
{
i++; // FIXME: are there more arguments?
if (opt->parse(argv[i]) != 0)
return i - 1;
}
}
else
{
if (has_equal_arg)
return i;
opt->parse("");
}
i++;
}
return argc;
}
pstring options::split_paragraphs(pstring text, unsigned width, unsigned ident,
unsigned firstline_ident)
{
auto paragraphs = pstring_vector_t(text,"\n");
pstring ret("");
for (auto &p : paragraphs)
{
pstring line = pstring("").rpad(" ", firstline_ident);
for (auto &s : pstring_vector_t(p, " "))
{
if (line.len() + s.len() > width)
{
ret += line + "\n";
line = pstring("").rpad(" ", ident);
}
line += s + " ";
}
ret += line + "\n";
}
return ret;
}
pstring options::help(pstring description, pstring usage,
unsigned width, unsigned ident)
{
pstring ret;
ret = split_paragraphs(description, width, 0, 0) + "\n";
ret += "Usage:\t" + usage + "\n\nOptions:\n";
for (auto & opt : m_opts )
{
pstring line = "";
if (opt->short_opt() != "")
line += " -" + opt->short_opt();
if (opt->long_opt() != "")
{
if (line != "")
line += ", ";
else
line = " ";
line += "--" + opt->long_opt();
if (opt->has_argument())
{
line += "=";
option_str_limit *ol = dynamic_cast<option_str_limit *>(opt);
if (ol)
{
for (auto &v : ol->limit())
{
line += v + "|";
}
line = line.left(line.len() - 1);
}
else
line += "Value";
}
}
line = line.rpad(" ", 20) + " ";
if (line.len() > 21)
{
ret += line + "\n";
ret += split_paragraphs(opt->help(), 72, 21, 21);
}
else
ret += split_paragraphs(line + opt->help(), 72, 21, 0);
}
return ret;
}
option *options::getopt_short(pstring arg)
{
for (auto & opt : m_opts)
{
if (opt->short_opt() == arg)
return opt;
}
return nullptr;
}
option *options::getopt_long(pstring arg)
{
for (auto & opt : m_opts)
{
if (opt->long_opt() == arg)
return opt;
}
return nullptr;
}
} // namespace plib
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