mirror of
https://github.com/matrix-construct/construct
synced 2024-11-30 02:32:43 +01:00
120 lines
2.9 KiB
C++
120 lines
2.9 KiB
C++
/*
|
|
* charybdis: an advanced ircd.
|
|
* inline/stringops.h: inlined string operations used in a few places
|
|
*
|
|
* Copyright (C) 2005-2016 Charybdis Development Team
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* 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, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
|
|
* USA
|
|
*/
|
|
|
|
#pragma once
|
|
#define HAVE_IRCD_PARAMS_H
|
|
|
|
namespace ircd::util
|
|
{
|
|
struct params;
|
|
}
|
|
|
|
class ircd::util::params
|
|
{
|
|
string_view in;
|
|
const char *sep;
|
|
std::vector<const char *> names;
|
|
|
|
const char *name(const size_t &i) const;
|
|
|
|
public:
|
|
IRCD_EXCEPTION(ircd::error, error)
|
|
IRCD_EXCEPTION(error, missing)
|
|
IRCD_EXCEPTION(error, invalid)
|
|
|
|
size_t count() const;
|
|
string_view operator[](const size_t &i) const; // returns empty
|
|
template<class T> T at(const size_t &i, const T &def) const; // throws invalid
|
|
template<class T> T at(const size_t &i) const; // throws missing or invalid
|
|
string_view at(const size_t &i) const; // throws missing
|
|
|
|
params(const string_view &in,
|
|
const char *const &sep,
|
|
const std::initializer_list<const char *> &names = {});
|
|
};
|
|
|
|
inline
|
|
ircd::util::params::params(const string_view &in,
|
|
const char *const &sep,
|
|
const std::initializer_list<const char *> &names)
|
|
:in{in}
|
|
,sep{sep}
|
|
,names{names}
|
|
{
|
|
}
|
|
|
|
template<class T>
|
|
T
|
|
ircd::util::params::at(const size_t &i,
|
|
const T &def)
|
|
const try
|
|
{
|
|
return count() > i? at<T>(i) : def;
|
|
}
|
|
catch(const bad_lex_cast &e)
|
|
{
|
|
throw invalid("parameter #%zu <%s>", i, name(i));
|
|
}
|
|
|
|
template<class T>
|
|
T
|
|
ircd::util::params::at(const size_t &i)
|
|
const try
|
|
{
|
|
return lex_cast<T>(at(i));
|
|
}
|
|
catch(const bad_lex_cast &e)
|
|
{
|
|
throw invalid("parameter #%zu <%s>", i, name(i));
|
|
}
|
|
|
|
inline ircd::string_view
|
|
ircd::util::params::at(const size_t &i)
|
|
const try
|
|
{
|
|
return token(in, sep, i);
|
|
}
|
|
catch(const std::out_of_range &e)
|
|
{
|
|
throw missing("required parameter #%zu <%s>", i, name(i));
|
|
}
|
|
|
|
inline ircd::string_view
|
|
ircd::util::params::operator[](const size_t &i)
|
|
const
|
|
{
|
|
return count() > i? token(in, sep, i) : string_view{};
|
|
}
|
|
|
|
inline size_t
|
|
ircd::util::params::count()
|
|
const
|
|
{
|
|
return token_count(in, sep);
|
|
}
|
|
|
|
inline const char *
|
|
ircd::util::params::name(const size_t &i)
|
|
const
|
|
{
|
|
return names.size() > i? *std::next(begin(names), i) : "<unnamed>";
|
|
}
|