gnu/dist/groff/src/libs/libgroff/itoa.c

   1 /*      $NetBSD$        */
   2
   3 /* Copyright (C) 1989, 1990, 1991, 1992, 2000, 2002, 2004
   4      Free Software Foundation, Inc.
   5      Written by James Clark (jjc@jclark.com)
   6
   7 This file is part of groff.
   8
   9 groff is free software; you can redistribute it and/or modify it under
  10 the terms of the GNU General Public License as published by the Free
  11 Software Foundation; either version 2, or (at your option) any later
  12 version.
  13
  14 groff is distributed in the hope that it will be useful, but WITHOUT ANY
  15 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  16 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  17 for more details.
  18
  19 You should have received a copy of the GNU General Public License along
  20 with groff; see the file COPYING.  If not, write to the Free Software
  21 Foundation, 51 Franklin St - Fifth Floor, Boston, MA 02110-1301, USA. */
  22
  23 #define INT_DIGITS 19           /* enough for 64 bit integer */
  24 #define UINT_DIGITS 20
  25
  26 #ifdef __cplusplus
  27 extern "C" {
  28 #endif
  29
  30 char *i_to_a(int i)
  31 {
  32   /* Room for INT_DIGITS digits, - and '\0' */
  33   static char buf[INT_DIGITS + 2];
  34   char *p = buf + INT_DIGITS + 1;       /* points to terminating '\0' */
  35   if (i >= 0) {
  36     do {
  37       *--p = '0' + (i % 10);
  38       i /= 10;
  39     } while (i != 0);
  40     return p;
  41   }
  42   else {                        /* i < 0 */
  43     do {
  44       *--p = '0' - (i % 10);
  45       i /= 10;
  46     } while (i != 0);
  47     *--p = '-';
  48   }
  49   return p;
  50 }
  51
  52 char *ui_to_a(unsigned int i)
  53 {
  54   /* Room for UINT_DIGITS digits and '\0' */
  55   static char buf[UINT_DIGITS + 1];
  56   char *p = buf + UINT_DIGITS;  /* points to terminating '\0' */
  57   do {
  58     *--p = '0' + (i % 10);
  59     i /= 10;
  60   } while (i != 0);
  61   return p;
  62 }
  63
  64 #ifdef __cplusplus
  65 }
  66 #endif