Line data    Source code

       1             : /*
       2             :  * sadplay - AdLib music player with graphics.
       3             :  * 
       4             :  * main_support.cc - implementation of the support functions for main.
       5             :  * 
       6             :  * Copyright (C) 2019 Marco Confalonieri <marco at marcoconfalonieri.it>
       7             :  *
       8             :  * This program is free software: you can redistribute it and/or modify
       9             :  * it under the terms of the GNU General Public License as published by
      10             :  * the Free Software Foundation, either version 3 of the License, or
      11             :  * (at your option) any later version.
      12             :  * 
      13             :  * This program is distributed in the hope that it will be useful,
      14             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      15             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      16             :  * GNU General Public License for more details.
      17             :  * 
      18             :  * You should have received a copy of the GNU General Public License
      19             :  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
      20             :  */
      21             : 
      22             : #include "main_support.h"
      23             : 
      24             : #include <fstream>
      25             : #include <iostream>
      26             : 
      27             : #include <unistd.h>
      28             : 
      29             : using std::ifstream;
      30             : using std::string;
      31             : 
      32             : // Reads the file list from a text file or the standard input.
      33           6 : void read_file_list_from_file(sadplay_args* args, string file, std::istream &input) {
      34             :     std::istream* file_list;
      35             : 
      36             :     // Open a file or assign our stream to standard input.
      37           6 :     if (file == "-") {
      38             :         file_list = &input;
      39             :     } else {
      40           4 :         file_list = new ifstream(file);
      41             :     }
      42             : 
      43             :     // Read the stream line by line.
      44           6 :     string line;
      45          48 :     while (std::getline(*file_list, line)) {
      46          18 :         args->file_list.push_back(line);
      47             :     }
      48             : 
      49             :     // if the file list is not in the standard input, closes the stream and
      50             :     // delete it. 
      51           6 :     if (file_list != &input) {
      52           4 :         ((ifstream*) file_list)->close();
      53           4 :         delete file_list;
      54             :     }
      55           6 : }
      56             : 
      57             : // Reads the file list from the command line arguments.
      58           4 : void read_file_list_from_argv(sadplay_args* args, int argc, char* argv[], int opt_index) {
      59          16 :     for (int idx = opt_index; idx < argc; idx++) {
      60          36 :         args->file_list.push_back(string(argv[idx]));
      61             :     }
      62           4 : }
      63             : 
      64             : // Reads the command line arguments.
      65           6 : void read_command_line(sadplay_args* args, int argc, char* argv[]) {
      66             :     int c;
      67          10 :     string file;
      68           6 :     bool file_list_used = false;
      69          16 :     while ((c = getopt(argc, argv, "vl:f:")) != -1) {
      70          12 :         switch (c) {
      71           6 :             case 'v':
      72           6 :                 args->verbose = true;
      73           6 :                 break;
      74             :             case 'l':
      75           6 :                 args->log_file = string(optarg);
      76           2 :                  break;
      77             :             case 'f':
      78           6 :                 file = string(optarg);
      79           2 :                 file_list_used = true;
      80           2 :                 break;
      81           2 :             case '?':
      82           2 :                 args->error = true;
      83           2 :                 return;
      84             :         }
      85             :     }
      86             : 
      87             :     // Either read the file list from a file or from the command line.
      88           4 :     if (file_list_used) {
      89           4 :         read_file_list_from_file(args, file);
      90             :     } else {
      91           2 :         read_file_list_from_argv(args, argc, argv, optind);
      92             :     }
      93           4 : }