vis.c

   1 /*
   2     Copyright © 2013 Alastair Stuart
   3
   4     This program is open source software: you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation, either version 3 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  12     GNU General Public License for more details.
  13 */
  14
  15 #include <stdio.h>
  16
  17 int main()
  18 {
  19     int c = fgetc(stdin);
  20     while (c != EOF)
  21     {
  22         int is_meta = 0;
  23
  24         if (c > 127 && c < 256) {
  25             printf("M-");
  26             is_meta = 1;
  27             c -= 128;
  28         }
  29
  30         if ((c >= ' ' && c <= '~') || ((c == '\t' || c == '\n') && !is_meta)) {
  31             printf("%c", c);
  32         } else if (c >= 0 && c < 32) {
  33             printf("^%c", c+64);
  34         }
  35
  36         if (c == 127) {
  37             printf("^?");
  38         }
  39
  40         c = fgetc(stdin);
  41     }
  42
  43     return 0;
  44 }