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#ifndef TMWA_MMO_HUMAN_TIME_DIFF_HPP
#define TMWA_MMO_HUMAN_TIME_DIFF_HPP
// human_time_diff.hpp - broken deltas
//
// Copyright © 2013 Ben Longbons <b.r.longbons@gmail.com>
//
// This file is part of The Mana World (Athena server)
//
// 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 3 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, see <http://www.gnu.org/licenses/>.
# include "../sanity.hpp"
# include "../strings/xstring.hpp"
# include "extract.hpp"
struct HumanTimeDiff
{
short year, month, day, hour, minute, second;
explicit
operator bool()
{
return year || month || day || hour || minute || second;
}
bool operator !()
{
return !bool(*this);
}
};
inline
bool extract(XString str, HumanTimeDiff *iv)
{
// str is a sequence of [-+]?[0-9]+([ay]|m|[jd]|h|mn|s)
// there are NO spaces here
// parse by counting the number starts
auto is_num = [](char c)
{ return c == '-' || c == '+' || ('0' <= c && c <= '9'); };
if (!str || !is_num(str.front()))
return false;
*iv = HumanTimeDiff{};
while (str)
{
auto it = std::find_if_not(str.begin(), str.end(), is_num);
auto it2 = std::find_if(it, str.end(), is_num);
XString number = str.xislice_h(it);
XString suffix = str.xislice(it, it2);
str = str.xislice_t(it2);
short *ptr = nullptr;
if (suffix == "y"_s || suffix == "a"_s)
ptr = &iv->year;
else if (suffix == "m"_s)
ptr = &iv->month;
else if (suffix == "j"_s || suffix == "d"_s)
ptr = &iv->day;
else if (suffix == "h"_s)
ptr = &iv->hour;
else if (suffix == "mn"_s)
ptr = &iv->minute;
else if (suffix == "s"_s)
ptr = &iv->second;
else
return false;
if (number.startswith('+') && !number.startswith("+-"_s))
number = number.xslice_t(1);
if (*ptr || !extract(number, ptr))
return false;
}
return true;
}
#endif // TMWA_MMO_HUMAN_TIME_DIFF_HPP
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