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 %ld, expected %zu\n", o, nstr);
  25       result = 1;
  26     }
  27   rewind (fp);
  28   o = ftello (fp);
  29   if (o != 0)
  30     {
  31       printf ("second ftello returned %ld, expected 0\n", o);
  32       result = 1;
  33     }
  34   if (fseeko (fp, 0, SEEK_END) != 0)
  35     {
  36       puts ("fseeko failed");
  37       return 1;
  38     }
  39   o = ftello (fp);
  40   if (o != nstr)
  41     {
  42       printf ("third ftello returned %ld, expected %zu\n", o, nstr);
  43       result = 1;
  44     }
  45   rewind (fp);
  46   static const char str2[] = "just hello";
  47 #define nstr2 (sizeof (str2) - 1)
  48   assert (nstr2 < nstr);
  49   fputs (str2, fp);
  50   o = ftello (fp);
  51   if (o != nstr2)
  52     {
  53       printf ("fourth ftello returned %ld, expected %zu\n", o, nstr2);
  54       result = 1;
  55     }
  56   fclose (fp);
  57   static const char str3[] = "just hellod";
  58   if (strcmp (buf, str3) != 0)
  59     {
  60       printf ("final string is \"%s\", expected \"%s\"\n",
  61               buf, str3);
  62       result = 1;
  63     }
  64   return result;
  65 }
  66
  67 #define TEST_FUNCTION do_test ()
  68 #include "../test-skeleton.c"