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annotate lib/sig2str.h @ 3821:22b17205df86

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New file: from Paul Eggert.
author Jim Meyering <jim@meyering.net>
date Sun, 28 Apr 2002 21:17:45 +0000
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children 68803dccd533
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3821
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1 /* sig2str.h -- convert between signal names and numbers
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2
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3 Copyright (C) 2002 Free Software Foundation, Inc.
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4
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5 This program is free software; you can redistribute it and/or modify
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6 it under the terms of the GNU General Public License as published by
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7 the Free Software Foundation; either version 2, or (at your option)
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8 any later version.
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9
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10 This program is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 GNU General Public License for more details.
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14
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15 You should have received a copy of the GNU General Public License
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16 along with this program; if not, write to the Free Software Foundation,
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17 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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18
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19 /* Written by Paul Eggert. */
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20
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21 /* Include <signal.h> before including this file. */
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22
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23 /* Don't override system declarations of SIG2STR_MAX, sig2str, str2sig. */
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24 #ifndef SIG2STR_MAX
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25
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26 /* Upper bound on the string length of an integer converted to string.
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27 302 / 1000 is ceil (log10 (2.0)). Subtract 1 for the sign bit;
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28 add 1 for integer division truncation; add 1 more for a minus sign. */
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29 # define INT_STRLEN_BOUND(t) ((sizeof (t) * CHAR_BIT - 1) * 302 / 1000 + 2)
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30
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31 /* Size of a buffer needed to hold a signal name like "HUP". */
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32 # define SIG2STR_MAX (sizeof "SIGRTMAX" + INT_STRLEN_BOUND (int) - 1)
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33
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34 int sig2str (int, char *);
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35 int str2sig (char const *, int *);
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36
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37 #endif
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38
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39 /* An upper bound on signal numbers allowed by the system. */
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40
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41 #if defined _sys_nsig
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42 # define SIGNUM_BOUND (_sys_nsig - 1)
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43 #elif defined NSIG
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44 # define SIGNUM_BOUND (NSIG - 1)
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45 #elif defined WTERMSIG
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46 # define SIGNUM_BOUND WTERMSIG (~ 0)
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47 #else
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48 # define SIGNUM_BOUND 127
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49 #endif