stdio-common/bug28.c

   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"