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/*
* Copyright (c) [2011-2015] Novell, Inc.
* Copyright (c) [2016-2020] SUSE LLC
*
* All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as published
* by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, contact Novell, Inc.
*
* To contact Novell about this file by physical or electronic mail, you may
* find current contact information at www.novell.com.
*/
#include <algorithm>
#include <snapper/AppUtil.h>
#include "GetOpts.h"
#include "text.h"
namespace snapper
{
using namespace std;
const struct vector<Option> GetOpts::no_options = {};
GetOpts::GetOpts(int argc, char** argv)
: argc(argc), argv(argv)
{
opterr = 0; // we report errors on our own
}
ParsedOpts
GetOpts::parse(const vector<Option>& options)
{
return parse(nullptr, options);
}
ParsedOpts
GetOpts::parse(const char* command, const vector<Option>& options)
{
string optstring = make_optstring(options);
vector<struct option> longopts = make_longopts(options);
map<string, string> result;
while (true)
{
int option_index = 0;
int c = getopt_long(argc, argv, optstring.c_str(), &longopts[0], &option_index);
switch (c)
{
case -1:
{
return result;
}
case '?':
{
string opt;
if (optopt != 0)
opt = string("-") + (char)(optopt);
else
opt = argv[optind - 1];
string msg;
if (!command)
msg = sformat(_("Unknown global option '%s'."), opt.c_str());
else
msg = sformat(_("Unknown option '%s' for command '%s'."), opt.c_str(), command);
SN_THROW(OptionsException(msg));
break;
}
case ':':
{
string opt;
if (optopt != 0)
{
vector<Option>::const_iterator it = find(options, optopt);
if (it == options.end())
SN_THROW(OptionsException("option not found"));
opt = string("--") + it->name;
}
else
{
opt = argv[optind - 1];
}
string msg;
if (!command)
msg = sformat(_("Missing argument for global option '%s'."), opt.c_str());
else
msg = sformat(_("Missing argument for command option '%s'."), opt.c_str());
SN_THROW(OptionsException(msg));
break;
}
default:
{
vector<Option>::const_iterator it = c ? find(options, c) : options.begin() + option_index;
if (it == options.end())
SN_THROW(OptionsException("option not found"));
result[it->name] = optarg ? optarg : "";
break;
}
}
}
}
vector<Option>::const_iterator
GetOpts::find(const vector<Option>& options, char c) const
{
return find_if(options.begin(), options.end(), [c](const Option& option)
{ return option.c == c; }
);
}
string
GetOpts::make_optstring(const vector<Option>& options) const
{
// '+' - do not permute, stop at the 1st non-option, which is the command or an argument
// ':' - return ':' to indicate missing arg, not '?'
string optstring = "+:";
for (const Option& option : options)
{
if (option.c == 0)
continue;
optstring += option.c;
switch (option.has_arg)
{
case no_argument:
break;
case required_argument:
optstring += ':';
break;
}
}
return optstring;
}
vector<struct option>
GetOpts::make_longopts(const vector<Option>& options) const
{
vector<struct option> ret;
for (const Option& option : options)
ret.push_back({ option.name, option.has_arg, nullptr, option.c });
ret.push_back({ nullptr, 0, nullptr, 0 });
return ret;
}
}
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