gnu/dist/diffutils/lib/inttostr.h

   1 /*      $NetBSD$        */
   2
   3 /* inttostr.h -- convert integers to printable strings
   4
   5    Copyright (C) 2001 Free Software Foundation, Inc.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2, or (at your option)
  10    any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software Foundation,
  19    Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  20
  21 /* Written by Paul Eggert */
  22
  23 #if HAVE_CONFIG_H
  24 # include <config.h>
  25 #endif
  26
  27 #if HAVE_INTTYPES_H
  28 # include <inttypes.h>
  29 #endif
  30
  31 #if HAVE_LIMITS_H
  32 # include <limits.h>
  33 #endif
  34 #ifndef CHAR_BIT
  35 # define CHAR_BIT 8
  36 #endif
  37
  38 #if HAVE_SYS_TYPES_H
  39 # include <sys/types.h>
  40 #endif
  41
  42 #define TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
  43
  44 /* Upper bound on the string length of an integer converted to string.
  45    302 / 1000 is ceil (log10 (2.0)).  Subtract 1 for the sign bit;
  46    add 1 for integer division truncation; add 1 more for a minus sign.  */
  47 #define INT_STRLEN_BOUND(t) \
  48  ((sizeof (t) * CHAR_BIT - TYPE_SIGNED (t)) * 302 / 1000 + 1 + TYPE_SIGNED (t))
  49
  50 #define INT_BUFSIZE_BOUND(t) (INT_STRLEN_BOUND (t) + 1)
  51
  52 #ifndef PARAMS
  53 # if defined PROTOTYPES || defined __STDC__
  54 #  define PARAMS(Args) Args
  55 # else
  56 #  define PARAMS(Args) ()
  57 # endif
  58 #endif
  59
  60 char *offtostr PARAMS ((off_t, char *));
  61 char *imaxtostr PARAMS ((intmax_t, char *));
  62 char *umaxtostr PARAMS ((uintmax_t, char *));