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   1 #include "config.h"
   2 #include <stdio.h>
   3 #include <string.h>
   4
   5 /**
   6  * utf8 - Simple routines to encode/decode valid UTF-8.
   7  *
   8  * This code contains routines to encode and decode UTF-8 characters.
   9  * Table and test code stolen entirely from:
  10  *    Copyright (c) 2017 Christian Hansen <chansen@cpan.org>
  11  *    <https://github.com/chansen/c-utf8-valid>
  12  *
  13  * Example:
  14  *      int main(int argc, char *argv[])
  15  *      {
  16  *              size_t i;
  17  *              struct utf8_state utf8_state = UTF8_STATE_INIT;
  18  *              bool decoded = true;
  19  *
  20  *              for (i = 0; i < strlen(argv[1]); i++) {
  21  *                      decoded = utf8_decode(&utf8_state, argv[1][i]);
  22  *                      if (decoded) {
  23  *                              if (errno != 0)
  24  *                                      err(1, "Invalid UTF8 char %zu-%zu",
  25  *                                          i - utf8_state.used_len, i);
  26  *                              printf("Character %u\n", utf8_state.c);
  27  *                      }
  28  *              }
  29  *
  30  *              if (!decoded)
  31  *                      errx(1, "Incomplete UTF8");
  32  *              return 0;
  33  *      }
  34  *
  35  * License: BSD-MIT
  36  */
  37 int main(int argc, char *argv[])
  38 {
  39         /* Expect exactly one argument */
  40         if (argc != 2)
  41                 return 1;
  42
  43         if (strcmp(argv[1], "depends") == 0) {
  44                 return 0;
  45         }
  46
  47         return 1;
  48 }