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#ifndef EXTRACT_HPP
#define EXTRACT_HPP
// extract.hpp - a simple, hierarchical, tokenizer
//
// Copyright © 2012-2013 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 <algorithm>
#include "const_array.hpp"
#include "mmo.hpp"
template<class T, typename=typename std::enable_if<std::is_integral<T>::value && !std::is_same<T, char>::value>::type>
bool extract(const_string str, T *iv)
{
if (!str || str.size() > 20)
return false;
if (!((str.front() == '-' && std::is_signed<T>::value)
|| ('0' <= str.front() && str.front() <= '9')))
return false;
char buf[20 + 1];
std::copy(str.begin(), str.end(), buf);
buf[str.size()] = '\0';
char *end;
errno = 0;
if (std::is_signed<T>::value)
{
long long v = strtoll(buf, &end, 10);
if (errno || *end)
return false;
*iv = v;
return *iv == v;
}
else
{
unsigned long long v = strtoull(buf, &end, 10);
if (errno || *end)
return false;
*iv = v;
return *iv == v;
}
}
// extra typename=void to workaround some duplicate overload rule
template<class T, typename=typename std::enable_if<std::is_enum<T>::value>::type, typename=void>
bool extract(const_string str, T *iv)
{
typedef typename underlying_type<T>::type U;
U v;
// defer to integer version
if (!extract(str, &v))
return false;
// TODO check bounds using enum min/max as in SSCANF
*iv = static_cast<T>(v);
return true;
}
bool extract(const_string str, const_string *rv);
bool extract(const_string str, std::string *rv);
template<size_t N>
__attribute__((deprecated))
bool extract(const_string str, char (*out)[N])
{
if (str.size() >= N)
return false;
std::copy(str.begin(), str.end(), *out);
std::fill(*out + str.size() , *out + N, '\0');
return true;
}
// basically just a std::tuple
// but it provides its data members publically
template<char split, class... T>
class Record;
template<char split>
class Record<split>
{
};
template<char split, class F, class... R>
class Record<split, F, R...>
{
public:
F frist;
Record<split, R...> rest;
public:
Record(F f, R... r)
: frist(f), rest(r...)
{}
};
template<char split, class... T>
Record<split, T...> record(T... t)
{
return Record<split, T...>(t...);
}
template<char split>
bool extract(const_string str, Record<split>)
{
return !str;
}
template<char split, class F, class... R>
bool extract(const_string str, Record<split, F, R...> rec)
{
const char *s = std::find(str.begin(), str.end(), split);
if (s == str.end())
return sizeof...(R) == 0 && extract(str, rec.frist);
return extract(const_string(str.begin(), s), rec.frist)
&& extract(const_string(s + 1, str.end()), rec.rest);
}
template<char split, class T>
struct VRecord
{
std::vector<T> *arr;
};
template<char split, class T>
VRecord<split, T> vrec(std::vector<T> *arr)
{
return {arr};
}
template<char split, class T>
bool extract(const_string str, VRecord<split, T> rec)
{
if (str.empty())
return true;
const char *s = std::find(str.begin(), str.end(), split);
rec.arr->emplace_back();
if (s == str.end())
return extract(str, &rec.arr->back());
return extract(const_string(str.begin(), s), &rec.arr->back())
&& extract(const_string(s + 1, str.end()), rec);
}
bool extract(const_string str, struct global_reg *var);
bool extract(const_string str, struct item *it);
#endif // EXTRACT_HPP
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