/* Convert between lowlevel sigmask and libc representation of sigset_t.

   Generic version.

   Copyright (C) 1998-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Joe Keane <jgk@jgk.org>.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 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

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

/* Convert between an old-style 32-bit signal mask and a POSIX sigset_t.  */

#include <sigsetops.h>

/* Perform *SET = MASK.  Unused bits of *SET are set to 0.

   Returns zero for success or -1 for errors (from sigaddset/sigemptyset).  */

static inline int __attribute__ ((unused))

sigset_set_old_mask (sigset_t *set, int mask)

{

  if (sizeof (__sigset_t) == sizeof (unsigned int))

    *set = (unsigned int) mask;

  else

    {

      unsigned int __sig;

      if (__sigemptyset (set) < 0)

	return -1;

      for (__sig = 1; __sig < NSIG && __sig <= sizeof (mask) * 8; __sig++)

	if (mask & sigmask (__sig))

	  if (__sigaddset (set, __sig) < 0)

	    return -1;

    }

  return 0;

}

/* Return the sigmask corresponding to *SET.

   Unused bits of *SET are thrown away.  */

static inline int __attribute__ ((unused))

sigset_get_old_mask (const sigset_t *set)

{

  if (sizeof (sigset_t) == sizeof (unsigned int))

    return (unsigned int) *set;

  else

    {

      unsigned int mask = 0;

      unsigned int sig;

      for (sig = 1; sig < NSIG && sig <= sizeof (mask) * 8; sig++)

	if (__sigismember (set, sig))

	  mask |= sigmask (sig);

      return mask;

    }

}