stdio-common/tst-obprintf.c

   1 #include <mcheck.h>
   2 #include <obstack.h>
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5
   6
   7 int
   8 main (void)
   9 {
  10   struct obstack ob;
  11   int n;
  12
  13   mcheck_pedantic (NULL);
  14
  15 #define obstack_chunk_alloc malloc
  16 #define obstack_chunk_free free
  17
  18   obstack_init (&ob);
  19
  20   for (n = 0; n < 40000; ++n)
  21     {
  22       mcheck_check_all ();
  23       obstack_printf (&ob, "%.*s%05d", 1 + n % 7, "foobarbaz", n);
  24       if (n % 777 == 0)
  25         obstack_finish (&ob);
  26     }
  27
  28   /* Another loop where we finish all objects, each of size 1.  This will
  29      manage to call `obstack_print' with all possible positions inside
  30      an obstack chunk.  */
  31   for (n = 0; n < 40000; ++n)
  32     {
  33       mcheck_check_all ();
  34       obstack_printf (&ob, "%c", 'a' + n % 26);
  35       obstack_finish (&ob);
  36     }
  37
  38   /* And a final check.  */
  39   mcheck_check_all ();
  40
  41   return 0;
  42 }