stdio-common/tst-fmemopen2.c

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