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#pragma once
// array.hpp - A simple bounds-checked array.
//
// Copyright © 2014 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 "fwd.hpp"
#include <cassert>
#include <cstddef>
#include "oops.hpp"
// half the important stuff is now in fwd.hpp !!!
namespace tmwa
{
template<class I, I be, I en>
struct ExclusiveIndexing
{
using index_type = I;
constexpr static size_t index_to_offset(index_type idx)
{ return static_cast<size_t>(idx) - static_cast<size_t>(be); }
constexpr static index_type offset_to_index(size_t off)
{ return static_cast<I>(off + static_cast<size_t>(be)); }
constexpr static size_t alloc_size = index_to_offset(en) - index_to_offset(be);
};
template<class I, I lo, I hi>
struct InclusiveIndexing
{
using index_type = I;
constexpr static size_t index_to_offset(index_type idx)
{ return static_cast<size_t>(idx) - static_cast<size_t>(lo); }
constexpr static index_type offset_to_index(size_t off)
{ return static_cast<I>(off + static_cast<size_t>(lo)); }
constexpr static size_t alloc_size = index_to_offset(hi) - index_to_offset(lo) + 1;
};
template<class E, E n>
struct EnumIndexing : ExclusiveIndexing<E, static_cast<E>(0), n>
{
};
template<class I, size_t limit>
struct InventoryIndexing
{
using index_type = I;
constexpr static size_t index_to_offset(index_type idx)
{ return idx.get0(); }
constexpr static index_type offset_to_index(size_t off)
{ return I::from(off); }
constexpr static size_t alloc_size = limit;
};
template<class T, class I>
struct GenericArray
{
T data[I::alloc_size];
public:
T *begin()
{ return data + 0; }
T *end()
{ return data + I::alloc_size; }
const T *begin() const
{ return data + 0; }
const T *end() const
{ return data + I::alloc_size; }
size_t size() const
{ return I::alloc_size; }
T& operator [](typename I::index_type i_)
{
size_t i = I::index_to_offset(i_);
ALLEGE ("index in bounds", i < size());
return data[i];
}
const T& operator [](typename I::index_type i_) const
{
size_t i = I::index_to_offset(i_);
ALLEGE ("index in bounds", i < size());
return data[i];
}
friend bool operator == (GenericArray& lhs, GenericArray& rhs)
{
for (size_t i = 0; i < I::alloc_size; ++i)
{
if (lhs.data[i] != rhs.data[i])
return false;
}
return true;
}
friend bool operator != (GenericArray& lhs, GenericArray& rhs)
{
return !(lhs == rhs);
}
};
} // namespace tmwa
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