memcheck/tests/memccpy1.c

   1 // Example copied from https://en.cppreference.com/w/c/string/byte/memccpy
   2 #include <ctype.h>
   3 #include <stdio.h>
   4 #include <string.h>
   5
   6 int main(void)
   7 {
   8     const char src0[] = "Stars: Altair, Sun, Vega.";
   9     const char* src = strdup(src0);
  10     const char terminal[] = {':', ' ', ',', '.', '!'};
  11     char dest[sizeof src0];
  12     const char alt = '@';
  13
  14     for (size_t i = 0; i != sizeof terminal; ++i)
  15     {
  16         void* to = memccpy(dest, src, terminal[i], sizeof dest);
  17
  18         printf("Terminal '%c' (%s):\t\"", terminal[i], to ? "found" : "absent");
  19
  20         // if `terminal` character was not found - print the whole `dest`
  21         to = to ? to : dest + sizeof dest;
  22
  23         for (char* from = dest; from != to; ++from)
  24             putchar(isprint(*from) ? *from : alt);
  25
  26         puts("\"");
  27     }
  28
  29
  30     puts("\n" "Separate star names from distances (ly):");
  31     const char *star_distance[] = {
  32         "Arcturus : 37", "Vega : 25", "Capella : 43", "Rigel : 860", "Procyon : 11"
  33     };
  34     char names_only[64];
  35     char *first = names_only;
  36     char *last = names_only + sizeof names_only;
  37
  38     for (size_t t = 0; t != (sizeof star_distance) / (sizeof star_distance[0]); ++t)
  39     {
  40         if (first)
  41             first = memccpy(first, star_distance[t], ' ', last - first);
  42         else
  43             break;
  44     }
  45
  46     if (first)
  47     {
  48         *first = '\0';
  49         puts(names_only);
  50     }
  51     else
  52         puts("Buffer is too small.");
  53 }
  54