mystruct_opt.cpp

/**
 * @file    mystruct_opt.cpp
 * @author  Patrick Flick <patrick.flick@gmail.com>
 *
 * Copyright (c) 2016 Georgia Institute of Technology. All Rights Reserved.
 */
#include "mystruct_opt.h"
#include <iostream>
#include <cstdlib>

/**
 * Returns the MPI_Datatype for `MyStruct`.
 *
 * TODO: You have to implement this function here:
 */
MPI_Datatype mystruct_get_mpi_type() {
    // use MPI commands to create a custom data type for MyStruct
    MPI_Datatype type;

    // TODO: create the MPI datatype for MyStruct

    MPI_Type_commit(&type);
    return type;
}


/*********************************************************************
 *              Don't change anything beyond this point              *
 *********************************************************************/

/**
 * Returns a random instance of `MyStruct`.
 */
MyStruct mystruct_rand() {
    MyStruct result;
    result.key = rand();
    result.d = rand()*1.0/RAND_MAX;
    result.e[0] = 'a' + rand() % 26;
    result.e[1] = 'a' + rand() % 26;
    result.e[2] = 'a' + rand() % 26;
    result.e[3] = 0;
    return result;
}

/**
 * Returns the value of the key of `MyStruct`.
 */
unsigned int mystruct_key_access(const MyStruct& s) {
    return s.key;
}

// output format for MyStruct
std::ostream& operator <<(std::ostream& stream, const MyStruct& s) {
    stream << "{key=" << s.key << ",d=" << s.d << ",e=\"" << s.e << "\"}";
    return stream;
}

// operator used for comparison based sorting
bool operator<(const MyStruct& lhs, const MyStruct& rhs) {
    return lhs.key < rhs.key;
}
// operator for comparing if two MyStruct's are equal
bool operator==(const MyStruct& lhs, const MyStruct& rhs) {
    return (lhs.key == rhs.key) && (lhs.d == rhs.d) && (std::string(lhs.e) == std::string(rhs.e));
}