string/tst-strlen.c

   1 #include <stdio.h>
   2 #include <string.h>
   3
   4 int
   5 main()
   6 {
   7   static const lens[16] = { 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 4 };
   8   char buf[24];
   9   int words;
  10
  11   for (words = 0; words < 4; ++words)
  12     {
  13       int last;
  14       memset (buf, 'a', words * 4);
  15
  16       for (last = 0; last < 16; ++last)
  17         {
  18           buf[words * 4 + 0] = (last & 1) != 0 ? 'b' : '\0';
  19           buf[words * 4 + 1] = (last & 2) != 0 ? 'c' : '\0';
  20           buf[words * 4 + 2] = (last & 4) != 0 ? 'd' : '\0';
  21           buf[words * 4 + 3] = (last & 8) != 0 ? 'e' : '\0';
  22           buf[words * 4 + 4] = '\0';
  23
  24           if (strlen (buf) != words * 4 + lens[last])
  25             {
  26               printf ("failed for words=%d and last=%d\n", words, last);
  27               return 1;
  28             }
  29         }
  30     }
  31   return 0;
  32 }