data.cpp

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#include "data.hpp"
 
#include <fstream>
#include <string>
#include <iostream> // Required for std::endl used indirectly by save_* functions
 
void save_search_data(const std::string& method, size_t n, size_t m, size_t l, size_t num_nanoseconds, size_t num_repetitions, size_t min_par_compare, bool is_genetic)
{
    // Construct the full path and filename for the CSV data file.
    std::string PREFIX = get_data_directory(is_genetic) + HOSTNAME + "-" + SEARCH_DATA_FILENAME;
    std::string filename = PREFIX + method + CSV_EXTENSION;
 
    // Open the file in append mode. Creates the file if it doesn't exist.
    std::ofstream file(filename, std::ios::app);
    // Write the data as a single line, comma-separated.
    file << n << "," << m << "," << l << "," << num_nanoseconds << "," << num_repetitions << "," << min_par_compare << std::endl;
    // File is automatically closed when 'file' goes out of scope.
}
 
void save_construction_data(const std::string& method, size_t n, size_t m, size_t l, size_t num_nanoseconds, size_t num_repetitions, size_t min_par_compare, bool is_genetic)
{
    // Construct the full path and filename for the CSV data file.
    std::string PREFIX = get_data_directory(is_genetic) + HOSTNAME + "-" + CONSTRUCTION_DATA_FILENAME;
    std::string filename = PREFIX + method + CSV_EXTENSION;
 
    // Open the file in append mode. Creates the file if it doesn't exist.
    std::ofstream file(filename, std::ios::app);
    // Write the data as a single line, comma-separated.
    file << n << "," << m << "," << l << "," << num_nanoseconds << "," << num_repetitions << "," << min_par_compare << std::endl;
    // File is automatically closed when 'file' goes out of scope.
}
 
void save_removal_data(const std::string& method, size_t n, size_t m, size_t l, size_t num_nanoseconds, size_t num_repetitions, size_t min_par_compare, bool is_genetic)
{
    // Construct the full path and filename for the CSV data file.
    std::string PREFIX = get_data_directory(is_genetic) + HOSTNAME + "-" + REMOVAL_DATA_FILENAME;
    std::string filename = PREFIX + method + CSV_EXTENSION;
 
    // Open the file in append mode. Creates the file if it doesn't exist.
    std::ofstream file(filename, std::ios::app);
    // Write the data as a single line, comma-separated.
    file << n << "," << m << "," << l << "," << num_nanoseconds << "," << num_repetitions << "," << min_par_compare << std::endl;
    // File is automatically closed when 'file' goes out of scope.
}
 
std::string get_hostname()
{
    std::string hostname;
    // Attempt to open the hostname file provided by the kernel (Linux-specific).
    std::ifstream file("/proc/sys/kernel/hostname");
    if (file.is_open()) // Check if the file was successfully opened
    {
        // Read the entire line (hostname) from the file.
        std::getline(file, hostname);
        // File is automatically closed when 'file' goes out of scope.
    }
    // Return the retrieved hostname (or an empty string if reading failed).
    return hostname;
}
 
std::string pretty_print(size_t nanoseconds)
{
    size_t milliseconds = nanoseconds / 1e6;
    size_t seconds = nanoseconds / 1e9;
    size_t minutes = seconds / 60;
    size_t hours = minutes / 60;
 
    // Build the output string based on the largest significant unit.
    if (hours > 0)
    {
        // Format as h, m, s, ms
        return std::to_string(hours) + "h " + std::to_string(minutes % 60) + "m " + std::to_string(seconds % 60) + "s " + std::to_string(milliseconds % 1000) + "ms";
    }
    else if (minutes > 0)
    {
        // Format as m, s, ms
        return std::to_string(minutes) + "m " + std::to_string(seconds % 60) + "s " + std::to_string(milliseconds % 1000) + "ms";
    }
    else if (seconds > 0)
    {
        // Format as s, ms
        return std::to_string(seconds) + "s " + std::to_string(milliseconds % 1000) + "ms";
    }
    else // Only milliseconds or less
    {
        // Format as ms
        return std::to_string(milliseconds) + "ms";
    }
}