contrib/diffutils-2.8/lib/inttostr.h

   1 /* inttostr.h -- convert integers to printable strings
   2
   3    Copyright (C) 2001, 2002, 2003, 2004 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 #if HAVE_CONFIG_H
  22 # include <config.h>
  23 #endif
  24
  25 #if HAVE_INTTYPES_H
  26 # include <inttypes.h>
  27 #endif
  28 #if HAVE_STDINT_H
  29 # include <stdint.h>
  30 #endif
  31
  32 #include <limits.h>
  33
  34 #if HAVE_SYS_TYPES_H
  35 # include <sys/types.h>
  36 #endif
  37
  38 /* Upper bound on the string length of an integer converted to string.
  39    302 / 1000 is ceil (log10 (2.0)).  Subtract 1 for the sign bit;
  40    add 1 for integer division truncation; add 1 more for a minus sign.  */
  41 #define INT_STRLEN_BOUND(t) ((sizeof (t) * CHAR_BIT - 1) * 302 / 1000 + 2)
  42
  43 #define INT_BUFSIZE_BOUND(t) (INT_STRLEN_BOUND (t) + 1)
  44
  45 char *offtostr (off_t, char *);
  46 char *imaxtostr (intmax_t, char *);
  47 char *umaxtostr (uintmax_t, char *);