string.hpp

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// Copyright (c) 2019-2024 Simons Foundation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0.txt
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// Authors: Thomas Hahn, Olivier Parcollet, Nils Wentzell

 
#pragma once
 
#include "./communicator.hpp"
#include "./generic_communication.hpp"
#include "./ranges.hpp"
 
#include <string>
 
namespace mpi {


  inline void mpi_broadcast(std::string &s, communicator c, int root) {
    auto count = s.size();
    broadcast(count, c, root);
    if (c.rank() != root) s.resize(count);
    broadcast_range(s, c, root);
  }

  inline void mpi_gather_into(std::string const &s_in, std::string &s_out, communicator c = {}, int root = 0, bool all = false) {
    auto const gather_size = mpi::all_reduce(s_in.size(), c);
    if ((c.rank() == root || all) && s_out.size() != gather_size) s_out.resize(gather_size);
    gather_range(s_in, s_out, c, root, all);
  }

 
} // namespace mpi