stdio-common/tst-fmemopen2.c

   1 #include <assert.h>
   2 #include <stdio.h>
   3 #include <string.h>
   4 #include <sys/types.h>
   5
   6
   7 static int
   8 do_test (void)
   9 {
  10   int result = 0;
  11   char buf[100];
  12   FILE *fp = fmemopen (buf, sizeof (buf), "w");
  13   if (fp == NULL)
  14     {
  15       puts ("fmemopen failed");
  16       return 0;
  17     }
  18   static const char str[] = "hello world";
  19 #define nstr (sizeof (str) - 1)
  20   fputs (str, fp);
  21   off_t o = ftello (fp);
  22   if (o != nstr)
  23     {
  24       printf ("first ftello returned %jd, expected %zu\n",
  25               (intmax_t) o, nstr);
  26       result = 1;
  27     }
  28   rewind (fp);
  29   o = ftello (fp);
  30   if (o != 0)
  31     {
  32       printf ("second ftello returned %jd, expected 0\n", (intmax_t) o);
  33       result = 1;
  34     }
  35   if (fseeko (fp, 0, SEEK_END) != 0)
  36     {
  37       puts ("fseeko failed");
  38       return 1;
  39     }
  40   o = ftello (fp);
  41   if (o != nstr)
  42     {
  43       printf ("third ftello returned %jd, expected %zu\n",
  44               (intmax_t) o, nstr);
  45       result = 1;
  46     }
  47   rewind (fp);
  48   static const char str2[] = "just hello";
  49 #define nstr2 (sizeof (str2) - 1)
  50   assert (nstr2 < nstr);
  51   fputs (str2, fp);
  52   o = ftello (fp);
  53   if (o != nstr2)
  54     {
  55       printf ("fourth ftello returned %jd, expected %zu\n",
  56               (intmax_t) o, nstr2);
  57       result = 1;
  58     }
  59   fclose (fp);
  60   static const char str3[] = "just hellod";
  61   if (strcmp (buf, str3) != 0)
  62     {
  63       printf ("final string is \"%s\", expected \"%s\"\n",
  64               buf, str3);
  65       result = 1;
  66     }
  67   return result;
  68 }
  69
  70 #define TEST_FUNCTION do_test ()
  71 #include "../test-skeleton.c"