lib/sig2str.h

   1 /* sig2str.h -- convert between signal names and numbers
   2
   3    Copyright (C) 2002 Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 2, or (at your option)
   8    any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program; if not, write to the Free Software Foundation,
  17    Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  18
  19 /* Written by Paul Eggert.  */
  20
  21 /* Include <signal.h> before including this file.  */
  22
  23 /* Don't override system declarations of SIG2STR_MAX, sig2str, str2sig.  */
  24 #ifndef SIG2STR_MAX
  25
  26 /* Upper bound on the string length of an integer converted to string.
  27    302 / 1000 is ceil (log10 (2.0)).  Subtract 1 for the sign bit;
  28    add 1 for integer division truncation; add 1 more for a minus sign.  */
  29 # define INT_STRLEN_BOUND(t) ((sizeof (t) * CHAR_BIT - 1) * 302 / 1000 + 2)
  30
  31 /* Size of a buffer needed to hold a signal name like "HUP".  */
  32 # define SIG2STR_MAX (sizeof "SIGRTMAX" + INT_STRLEN_BOUND (int) - 1)
  33
  34 int sig2str (int, char *);
  35 int str2sig (char const *, int *);
  36
  37 #endif
  38
  39 /* An upper bound on signal numbers allowed by the system.  */
  40
  41 #if defined _sys_nsig
  42 # define SIGNUM_BOUND (_sys_nsig - 1)
  43 #elif defined NSIG
  44 # define SIGNUM_BOUND (NSIG - 1)
  45 #else
  46 # define SIGNUM_BOUND 64
  47 #endif