Update xcode_redirect.hpp

xcode_redirect.hpp

@@ -1,4 +1,3 @@
-//
 //  xcode_redirect.hpp
 //
 //  Created by Marcus Darden on 1/13/19.
@@ -14,9 +13,13 @@
 #include <cstdio>
 #include <cstring>
 
+
+
 inline char *get_filename_and_move_count(int &optind, char *argv[], int &move_count);
 inline void rotate_argv(int move_count, char *argv[], int &optind, int &argc);
 
+
+
 // REQUIRES: argc & argv from main(), and optind from getopt.h (optional)
 // MODIFIES: optind is incremented until it equals argc
 //           argc is decremented to discount any redirected members of argv
@@ -28,23 +31,31 @@ inline void rotate_argv(int move_count, char *argv[], int &optind, int &argc);
 //     stderr (from 2> errfilename or 2>errfilename).
 inline void xcode_redirect(int &argc, char *argv[], int optind = 1) {
     char *infile = nullptr, *outfile = nullptr, *errfile = nullptr;
+
     int move_count = 0;
+
     while (optind < argc) {
         switch (*argv[optind]) {
             case '<':  // redirect input formatted as '< file' or '<file'
                 infile = get_filename_and_move_count(optind, argv, move_count);
+
                 if (!freopen(infile, "r", stdin)) {
                     std::cerr << "Unable to open input file: " << infile << std::endl;
                     exit(1);
                 }  // if
+
                 break;
+
             case '>':  // redirect output formatted as '> file' or '>file'
                 outfile = get_filename_and_move_count(optind, argv, move_count);
+
                 if (!freopen(outfile, "w", stdout)) {
                     std::cerr << "Unable to open output file: " << outfile << std::endl;
                     exit(1);
                 }  // if
+
                 break;
+
             case '2':  // redirect error formatted as '2> file' or '2>file'
                 if (*(argv[optind] + 1) == '>') {
                     errfile = get_filename_and_move_count(optind, argv, move_count);
@@ -53,46 +64,61 @@ inline void xcode_redirect(int &argc, char *argv[], int optind = 1) {
                         exit(1);
                     }  // if
                 }  // if
+
                 break;
+
             default:  // not a redirection parameter
                 move_count = 0;
         }  // switch
+
         ++optind;
+
         if (move_count > 0) {
             rotate_argv(move_count, argv, optind, argc);
-        }
+        } // if
     }  // while
 }  // xcode_redirect()
 
+
 inline void rotate_argv(int move_count, char *argv[], int &optind, int &argc) {
     int moveind = optind - move_count;
+
     char *temp_pre1 = argv[moveind];
     char *temp_pre2 = argv[moveind + 1];
+
     while (moveind + move_count < argc) {
         argv[moveind] = argv[moveind + move_count];
         ++moveind;
     }  // while
+
     argv[moveind++] = temp_pre1;
+
     if (move_count == 2) {
         argv[moveind] = temp_pre2;
     }  // if
+
     optind -= move_count;
     argc -= move_count;
 }  // rotate_argv()
 
+
 inline char *get_filename_and_move_count(int &optind, char *argv[], int &move_count) {
     if (strlen(argv[optind]) > 2) {
         move_count = 1;
+
         // Must offset by 1 character (the <), offset by more if they put space(s) before filename
         int offset = 1;
+
         // Must also offset more for 2> (redirecting error output)
         if (argv[optind][0] == '2')
             ++offset;
         while (argv[optind][offset] == ' ')
             ++offset;
         return argv[optind] + offset;
     }  // if
+
     move_count = 2;
+
     return argv[++optind];
 }  // get_filename_and_move_count()