1  #include <stdio.h>
       2  #include <string.h>
       3  #include <stdlib.h>
       4  
       5  int
       6  do_test (void)
       7  {
       8    size_t instances = 16384;
       9  #define X0 "\n%1$s\n" "%1$s" "%2$s" "%2$s" "%3$s" "%4$s" "%5$d" "%5$d"
      10    const char *item = "\na\nabbcd55";
      11  #define X3 X0 X0 X0 X0 X0 X0 X0 X0
      12  #define X6 X3 X3 X3 X3 X3 X3 X3 X3
      13  #define X9 X6 X6 X6 X6 X6 X6 X6 X6
      14  #define X12 X9 X9 X9 X9 X9 X9 X9 X9
      15  #define X14 X12 X12 X12 X12
      16  #define TRAILER "%%%%%%%%%%%%%%%%%%%%%%%%%%"
      17  #define TRAILER2 TRAILER TRAILER
      18    size_t length = instances * strlen (item) + strlen (TRAILER) + 1;
      19  
      20    char *buf = malloc (length + 1);
      21    snprintf (buf, length + 1,
      22  	    X14 TRAILER2 "\n",
      23  	    "a", "b", "c", "d", 5);
      24  
      25    const char *p = buf;
      26    size_t i;
      27    for (i = 0; i < instances; ++i)
      28      {
      29        const char *expected;
      30        for (expected = item; *expected; ++expected)
      31  	{
      32  	  if (*p != *expected)
      33  	    {
      34  	      printf ("mismatch at offset %zu (%zu): expected %d, got %d\n",
      35  		      (size_t) (p - buf), i, *expected & 0xFF, *p & 0xFF);
      36  	      return 1;
      37  	    }
      38  	  ++p;
      39  	}
      40      }
      41    if (strcmp (p, TRAILER "\n") != 0)
      42      {
      43        printf ("mismatch at trailer: [%s]\n", p);
      44        return 1;
      45      }
      46    free (buf);
      47    return 0;
      48  }
      49  #define TEST_FUNCTION do_test ()
      50  #include "../test-skeleton.c"