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 *     with the distribution.
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/** @author Jia Pan */

#ifndef COAL_BROADPHASE_SIMPLEHASHTABLE_INL_H
#define COAL_BROADPHASE_SIMPLEHASHTABLE_INL_H

#include "coal/broadphase/detail/simple_hash_table.h"

#include <iterator>
namespace coal {

namespace detail {

//==============================================================================
template <typename Key, typename Data, typename HashFnc>
SimpleHashTable<Key, Data, HashFnc>::SimpleHashTable(const HashFnc& h) : h_(h) {
  // Do nothing
}

//==============================================================================
template <typename Key, typename Data, typename HashFnc>
void SimpleHashTable<Key, Data, HashFnc>::init(size_t size) {
  if (size == 0) {
    COAL_THROW_PRETTY("SimpleHashTable must have non-zero size.",
                      std::logic_error);
  }

  table_.resize(size);
  table_size_ = size;
}

//==============================================================================
template <typename Key, typename Data, typename HashFnc>
void SimpleHashTable<Key, Data, HashFnc>::insert(Key key, Data value) {
  std::vector<unsigned int> indices = h_(key);
  size_t range = table_.size();
  for (size_t i = 0; i < indices.size(); ++i)
    table_[indices[i] % range].push_back(value);
}

//==============================================================================
template <typename Key, typename Data, typename HashFnc>
std::vector<Data> SimpleHashTable<Key, Data, HashFnc>::query(Key key) const {
  size_t range = table_.size();
  std::vector<unsigned int> indices = h_(key);
  std::set<Data> result;
  for (size_t i = 0; i < indices.size(); ++i) {
    size_t index = indices[i] % range;
    std::copy(table_[index].begin(), table_[index].end(),
              std::inserter(result, result.end()));
  }

  return std::vector<Data>(result.begin(), result.end());
}

//==============================================================================
template <typename Key, typename Data, typename HashFnc>
void SimpleHashTable<Key, Data, HashFnc>::remove(Key key, Data value) {
  size_t range = table_.size();
  std::vector<unsigned int> indices = h_(key);
  for (size_t i = 0; i < indices.size(); ++i) {
    size_t index = indices[i] % range;
    table_[index].remove(value);
  }
}

//==============================================================================
template <typename Key, typename Data, typename HashFnc>
void SimpleHashTable<Key, Data, HashFnc>::clear() {
  table_.clear();
  table_.resize(table_size_);
}

}  // namespace detail
}  // namespace coal

#endif
