/* Copyright (c) 2007-2017. The SimGrid Team. All rights reserved.          */

/* This program is free software; you can redistribute it and/or modify it
 * under the terms of the license (GNU LGPL) which comes with this package. */

#include "private.hpp"
#include "smpi_coll.hpp"
#include "smpi_comm.hpp"
#include "smpi_datatype_derived.hpp"
#include "smpi_op.hpp"
#include "smpi_process.hpp"

XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(smpi_pmpi);


/* PMPI User level calls */
extern "C" { // Obviously, the C MPI interface should use the C linkage

int PMPI_Group_free(MPI_Group * group)
{
  if (group == nullptr) {
    return MPI_ERR_ARG;
  } else {
    if(*group != MPI_COMM_WORLD->group() && *group != MPI_GROUP_EMPTY)
      simgrid::smpi::Group::unref(*group);
    *group = MPI_GROUP_NULL;
    return MPI_SUCCESS;
  }
}

int PMPI_Group_size(MPI_Group group, int *size)
{
  if (group == MPI_GROUP_NULL) {
    return MPI_ERR_GROUP;
  } else if (size == nullptr) {
    return MPI_ERR_ARG;
  } else {
    *size = group->size();
    return MPI_SUCCESS;
  }
}

int PMPI_Group_rank(MPI_Group group, int *rank)
{
  if (group == MPI_GROUP_NULL) {
    return MPI_ERR_GROUP;
  } else if (rank == nullptr) {
    return MPI_ERR_ARG;
  } else {
    *rank = group->rank(smpi_process()->index());
    return MPI_SUCCESS;
  }
}

int PMPI_Group_translate_ranks(MPI_Group group1, int n, int *ranks1, MPI_Group group2, int *ranks2)
{
  if (group1 == MPI_GROUP_NULL || group2 == MPI_GROUP_NULL) {
    return MPI_ERR_GROUP;
  } else {
    for (int i = 0; i < n; i++) {
      if(ranks1[i]==MPI_PROC_NULL){
        ranks2[i]=MPI_PROC_NULL;
      }else{
        int index = group1->index(ranks1[i]);
        ranks2[i] = group2->rank(index);
      }
    }
    return MPI_SUCCESS;
  }
}

int PMPI_Group_compare(MPI_Group group1, MPI_Group group2, int *result)
{
  if (group1 == MPI_GROUP_NULL || group2 == MPI_GROUP_NULL) {
    return MPI_ERR_GROUP;
  } else if (result == nullptr) {
    return MPI_ERR_ARG;
  } else {
    *result = group1->compare(group2);
    return MPI_SUCCESS;
  }
}

int PMPI_Group_union(MPI_Group group1, MPI_Group group2, MPI_Group * newgroup)
{

  if (group1 == MPI_GROUP_NULL || group2 == MPI_GROUP_NULL) {
    return MPI_ERR_GROUP;
  } else if (newgroup == nullptr) {
    return MPI_ERR_ARG;
  } else {
    return group1->group_union(group2, newgroup);
  }
}

int PMPI_Group_intersection(MPI_Group group1, MPI_Group group2, MPI_Group * newgroup)
{

  if (group1 == MPI_GROUP_NULL || group2 == MPI_GROUP_NULL) {
    return MPI_ERR_GROUP;
  } else if (newgroup == nullptr) {
    return MPI_ERR_ARG;
  } else {
    return group1->intersection(group2,newgroup);
  }
}

int PMPI_Group_difference(MPI_Group group1, MPI_Group group2, MPI_Group * newgroup)
{
  if (group1 == MPI_GROUP_NULL || group2 == MPI_GROUP_NULL) {
    return MPI_ERR_GROUP;
  } else if (newgroup == nullptr) {
    return MPI_ERR_ARG;
  } else {
    return group1->difference(group2,newgroup);
  }
}

int PMPI_Group_incl(MPI_Group group, int n, int *ranks, MPI_Group * newgroup)
{
  if (group == MPI_GROUP_NULL) {
    return MPI_ERR_GROUP;
  } else if (newgroup == nullptr) {
    return MPI_ERR_ARG;
  } else {
    return group->incl(n, ranks, newgroup);
  }
}

int PMPI_Group_excl(MPI_Group group, int n, int *ranks, MPI_Group * newgroup)
{
  if (group == MPI_GROUP_NULL) {
    return MPI_ERR_GROUP;
  } else if (newgroup == nullptr) {
    return MPI_ERR_ARG;
  } else {
    if (n == 0) {
      *newgroup = group;
      if (group != MPI_COMM_WORLD->group() && group != MPI_COMM_SELF->group() && group != MPI_GROUP_EMPTY)
        group->ref();
      return MPI_SUCCESS;
    } else if (n == group->size()) {
      *newgroup = MPI_GROUP_EMPTY;
      return MPI_SUCCESS;
    } else {
      return group->excl(n,ranks,newgroup);
    }
  }
}

int PMPI_Group_range_incl(MPI_Group group, int n, int ranges[][3], MPI_Group * newgroup)
{
  if (group == MPI_GROUP_NULL) {
    return MPI_ERR_GROUP;
  } else if (newgroup == nullptr) {
    return MPI_ERR_ARG;
  } else {
    if (n == 0) {
      *newgroup = MPI_GROUP_EMPTY;
      return MPI_SUCCESS;
    } else {
      return group->range_incl(n,ranges,newgroup);
    }
  }
}

int PMPI_Group_range_excl(MPI_Group group, int n, int ranges[][3], MPI_Group * newgroup)
{
  if (group == MPI_GROUP_NULL) {
    return MPI_ERR_GROUP;
  } else if (newgroup == nullptr) {
    return MPI_ERR_ARG;
  } else {
    if (n == 0) {
      *newgroup = group;
      if (group != MPI_COMM_WORLD->group() && group != MPI_COMM_SELF->group() &&
          group != MPI_GROUP_EMPTY)
        group->ref();
      return MPI_SUCCESS;
    } else {
      return group->range_excl(n,ranges,newgroup);
    }
  }
}

MPI_Group PMPI_Group_f2c(MPI_Fint group){
  return simgrid::smpi::Group::f2c(group);
}

MPI_Fint PMPI_Group_c2f(MPI_Group group){
  return group->c2f();
}


}
