glibc/stdio-common/tst-sprintf.c

#include <stdio.h>
#include <stdlib.h>
#include <locale.h>
#include <string.h>
#include <libc-diag.h>


static int
do_test (void)
{
  char buf[100];
  int result = 0;

  if (sprintf (buf, "%.0ls", L"foo") != 0
      || strlen (buf) != 0)
    {
      puts ("sprintf (buf, \"%.0ls\", L\"foo\") produced some output");
      result = 1;
    }

#define SIZE (1024*70000)
#define STR(x) #x

  char *dst = malloc (SIZE + 1);

  if (dst == NULL)
    {
      puts ("memory allocation failure");
      result = 1;
    }
  else
    {
      sprintf (dst, "%*s", SIZE, "");
      if (strnlen (dst, SIZE + 1) != SIZE)
	{
	  puts ("sprintf (dst, \"%*s\", " STR(SIZE) ", \"\") did not produce enough output");
	  result = 1;
	}
      free (dst);
    }

  if (sprintf (buf, "%1$d%3$.*2$s%4$d", 7, 67108863, "x", 8) != 3
      || strcmp (buf, "7x8") != 0)
    {
      printf ("sprintf (buf, \"%%1$d%%3$.*2$s%%4$d\", 7, 67108863, \"x\", 8) produced `%s' output", buf);
      result = 1;
    }

  /* We are testing a corner case of the sprintf format string here.  */
  DIAG_PUSH_NEEDS_COMMENT;
  DIAG_IGNORE_NEEDS_COMMENT (4.9, "-Wformat");
  int n = sprintf (buf, "%67108863.16\"%d", 7);
  DIAG_POP_NEEDS_COMMENT;

  if (n != 14 || strcmp (buf, "%67108863.16\"7") != 0)
    {
      printf ("sprintf (buf, \"%%67108863.16\\\"%%d\", 7) produced `%s' output",
              buf);
      result = 1;
    }

  /* We are testing a corner case of the sprintf format string here.  */
  DIAG_PUSH_NEEDS_COMMENT;
  DIAG_IGNORE_NEEDS_COMMENT (4.9, "-Wformat");
  n = sprintf (buf, "%*\"%d", 0x3ffffff, 7);
  DIAG_POP_NEEDS_COMMENT;

  if (n != 11 || strcmp (buf, "%67108863\"7") != 0)
    {
      printf ("sprintf (buf, \"%%*\\\"%%d\", 0x3ffffff, 7) produced `%s' output", buf);
      result = 1;
    }

  if (setlocale (LC_ALL, "de_DE.UTF-8") == NULL)
    {
      puts ("cannot set locale");
      result = 1;
    }
  else if (sprintf (buf, "%.8s\n", "Foo: \277") != 7
	   || strcmp (buf, "Foo: \277\n") != 0)
    {
      printf ("sprintf (buf, \"%%.8s\\n\", \"Foo: \\277\") produced '%s' output\n", buf);
      result = 1;
    }

  return result;
}

#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"