libjava/java/security/Guard.java


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/* Guard.java -- Check access to a guarded object
   Copyright (C) 1998, 2002 Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

GNU Classpath is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Classpath; see the file COPYING.  If not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA.

Linking this library statically or dynamically with other modules is
making a combined work based on this library.  Thus, the terms and
conditions of the GNU General Public License cover the whole
combination.

As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
modules, and to copy and distribute the resulting executable under
terms of your choice, provided that you also meet, for each linked
independent module, the terms and conditions of the license of that
module.  An independent module is a module which is not derived from
or based on this library.  If you modify this library, you may extend
this exception to your version of the library, but you are not
obligated to do so.  If you do not wish to do so, delete this
exception statement from your version. */

package java.security;

/**
 * This interface specifies a mechanism for querying whether or not
 * access is allowed to a guarded object.
 *
 * @author Aaron M. Renn <arenn@urbanophile.com>
 * @see GuardedObject
 * @since 1.1
 * @status updated to 1.4
 */
public interface Guard
{
  /**
   * This method tests whether or not access is allowed to the specified
   * guarded object. Access is allowed if this method returns silently. If
   * access is denied, an exception is generated.
   *
   * @param obj the <code>Object</code> to test
   * @throws SecurityException if access to the object is denied
   */
  void checkGuard(Object obj);
} // interface Guard

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/* Copyright (C) 1991,96,97,98,99,2000,2001 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public License as
   published by the Free Software Foundation; either version 2 of the
   License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#include <ctype.h>
#include <locale.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>

struct ltest
  {
    const char *str;		/* Convert this.  */
    double expect;		/* To get this.  */
    char left;			/* With this left over.  */
    int err;			/* And this in errno.  */
  };
static const struct ltest tests[] =
  {
    { "12.345", 12.345, '\0', 0 },
    { "12.345e19", 12.345e19, '\0', 0 },
    { "-.1e+9", -.1e+9, '\0', 0 },
    { ".125", .125, '\0', 0 },
    { "1e20", 1e20, '\0', 0 },
    { "0e-19", 0, '\0', 0 },
    { "4\00012", 4.0, '\0', 0 },
    { "5.9e-76", 5.9e-76, '\0', 0 },
    { "0x1.4p+3", 10.0, '\0', 0 },
    { "0xAp0", 10.0, '\0', 0 },
    { "0x0Ap0", 10.0, '\0', 0 },
    { "0x0A", 10.0, '\0', 0 },
    { "0xA0", 160.0, '\0', 0 },
    { "0x0.A0p8", 160.0, '\0', 0 },
    { "0x0.50p9", 160.0, '\0', 0 },
    { "0x0.28p10", 160.0, '\0', 0 },
    { "0x0.14p11", 160.0, '\0', 0 },
    { "0x0.0A0p12", 160.0, '\0', 0 },
    { "0x0.050p13", 160.0, '\0', 0 },
    { "0x0.028p14", 160.0, '\0', 0 },
    { "0x0.014p15", 160.0, '\0', 0 },
    { "0x00.00A0p16", 160.0, '\0', 0 },
    { "0x00.0050p17", 160.0, '\0', 0 },
    { "0x00.0028p18", 160.0, '\0', 0 },
    { "0x00.0014p19", 160.0, '\0', 0 },
    { "0x1p-1023",
      1.11253692925360069154511635866620203210960799023116591527666e-308,
      '\0', 0 },
    { "0x0.8p-1022",
      1.11253692925360069154511635866620203210960799023116591527666e-308,
      '\0', 0 },
    { NULL, 0, '\0', 0 }
  };

static void expand (char *dst, int c);
static int long_dbl (void);
static int locale_test (void);

int
main (int argc, char ** argv)
{
  char buf[100];
  register const struct ltest *lt;
  char *ep;
  int status = 0;
  int save_errno;

  for (lt = tests; lt->str != NULL; ++lt)
    {
      double d;

      errno = 0;
      d = strtod(lt->str, &ep);
      save_errno = errno;
      printf ("strtod (\"%s\") test %u",
	     lt->str, (unsigned int) (lt - tests));
      if (d == lt->expect && *ep == lt->left && save_errno == lt->err)
	puts ("\tOK");
      else
	{
	  puts ("\tBAD");
	  if (d != lt->expect)
	    printf ("  returns %.60g, expected %.60g\n", d, lt->expect);
	  if (lt->left != *ep)
	    {
	      char exp1[5], exp2[5];
	      expand (exp1, *ep);
	      expand (exp2, lt->left);
	      printf ("  leaves '%s', expected '%s'\n", exp1, exp2);
	    }
	  if (save_errno != lt->err)
	    printf ("  errno %d (%s)  instead of %d (%s)\n",
		    save_errno, strerror (save_errno),
		    lt->err, strerror (lt->err));
	  status = 1;
	}
    }

  sprintf (buf, "%f", strtod ("-0.0", NULL));
  if (strcmp (buf, "-0.000000") != 0)
    {
      printf ("  strtod (\"-0.0\", NULL) returns \"%s\"\n", buf);
      status = 1;
    }

  status |= long_dbl ();

  status |= locale_test ();

  return status ? EXIT_FAILURE : EXIT_SUCCESS;
}

static void
expand (dst, c)
     char *dst;
     register int c;
{
  if (isprint (c))
    {
      dst[0] = c;
      dst[1] = '\0';
    }
  else
    (void) sprintf (dst, "%#.3o", (unsigned int) c);
}

static int
long_dbl (void)
{
  /* Regenerate this string using

     echo '(2^53-1)*2^(1024-53)' | bc | sed 's/\([^\]*\)\\*$/    "\1"/'

  */
  static const char longestdbl[] =
    "17976931348623157081452742373170435679807056752584499659891747680315"
    "72607800285387605895586327668781715404589535143824642343213268894641"
    "82768467546703537516986049910576551282076245490090389328944075868508"
    "45513394230458323690322294816580855933212334827479782620414472316873"
    "8177180919299881250404026184124858368";
  double d = strtod (longestdbl, NULL);

  printf ("strtod (\"%s\", NULL) = %g\n", longestdbl, d);

  if (d != 179769313486231570814527423731704356798070567525844996598917476803157260780028538760589558632766878171540458953514382464234321326889464182768467546703537516986049910576551282076245490090389328944075868508455133942304583236903222948165808559332123348274797826204144723168738177180919299881250404026184124858368.000000)
    return 1;

  return 0;
}

/* Perform a few tests in a locale with thousands separators.  */
static int
locale_test (void)
{
  static const struct
  {
    const char *loc;
    const char *str;
    double exp;
    ptrdiff_t nread;
  } tests[] =
    {
      { "de_DE.UTF-8", "1,5", 1.5, 3 },
      { "de_DE.UTF-8", "1.5", 1.0, 1 },
      { "de_DE.UTF-8", "1.500", 1500.0, 5 },
      { "de_DE.UTF-8", "36.893.488.147.419.103.232", 0x1.0p65, 26 }
    };
#define ntests (sizeof (tests) / sizeof (tests[0]))
  size_t n;
  int result = 0;

  puts ("\nLocale tests");

  for (n = 0; n < ntests; ++n)
    {
      double d;
      char *endp;

      if (setlocale (LC_ALL, tests[n].loc) == NULL)
	{
	  printf ("cannot set locale %s\n", tests[n].loc);
	  result = 1;
	  continue;
	}

      /* We call __strtod_interal here instead of strtod to tests the
	 handling of grouping.  */
      d = __strtod_internal (tests[n].str, &endp, 1);
      if (d != tests[n].exp)
	{
	  printf ("strtod(\"%s\") returns %g and not %g\n",
		  tests[n].str, d, tests[n].exp);
	  result = 1;
	}
      else if (endp - tests[n].str != tests[n].nread)
	{
	  printf ("strtod(\"%s\") read %td bytes and not %td\n",
		  tests[n].str, endp - tests[n].str, tests[n].nread);
	  result = 1;
	}
    }

  if (result == 0)
    puts ("all OK");

  return result;
}