string/tst-strlen.c

   1 /* Make sure we don't test the optimized inline functions if we want to
   2    test the real implementation.  */
   3 #undef __USE_STRING_INLINES
   4
   5 #include <stdio.h>
   6 #include <string.h>
   7
   8 int
   9 main(int argc, char *argv[])
  10 {
  11   static const size_t lens[] = { 0, 1, 0, 2, 0, 1, 0, 3,
  12                                  0, 1, 0, 2, 0, 1, 0, 4 };
  13   char basebuf[24 + 32];
  14   size_t base;
  15
  16   for (base = 0; base < 32; ++base)
  17     {
  18       char *buf = basebuf + base;
  19       size_t words;
  20
  21       for (words = 0; words < 4; ++words)
  22         {
  23           size_t last;
  24           memset (buf, 'a', words * 4);
  25
  26           for (last = 0; last < 16; ++last)
  27             {
  28               buf[words * 4 + 0] = (last & 1) != 0 ? 'b' : '\0';
  29               buf[words * 4 + 1] = (last & 2) != 0 ? 'c' : '\0';
  30               buf[words * 4 + 2] = (last & 4) != 0 ? 'd' : '\0';
  31               buf[words * 4 + 3] = (last & 8) != 0 ? 'e' : '\0';
  32               buf[words * 4 + 4] = '\0';
  33
  34               if (strlen (buf) != words * 4 + lens[last]
  35                   || strnlen (buf, -1) != words * 4 + lens[last])
  36                 {
  37                   printf ("failed for base=%Zu, words=%Zu, and last=%Zu\n",
  38                           base, words, last);
  39                   return 1;
  40                 }
  41             }
  42         }
  43     }
  44   return 0;
  45 }