math.hpp

// Copyright (c) 2017 Aler Denisov

// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:

// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
#include <eoslib/eos.hpp>


template<typename T>
inline T abs(const T& a) {
  return a > 0 ? a : -a;
}

// template<typename T> 
// inline T max(const T& a, const T& b) {
//   return a > b ? a : b;
// }

inline int64_t pos_to_hash(const int32_t &x, const int32_t &y) {
  return int64_t(x) | (int64_t(y) << 32);
}

inline void hash_to_pos(const int64_t &hash, int32_t *x, int32_t *y) {
  *x = int32_t(hash);
  *y = int32_t(hash >> 32);
}

inline int32_t get_distance(const int32_t &ax, const int32_t &ay, const int32_t &bx, const int32_t &by) {
  return uint32_t(abs(ax - bx) + abs(ay - by));
}