1  /* anytostr.c -- convert integers to printable strings
       2  
       3     Copyright (C) 2001, 2006, 2008-2023 Free Software Foundation, Inc.
       4  
       5     This file is free software: you can redistribute it and/or modify
       6     it under the terms of the GNU Lesser General Public License as
       7     published by the Free Software Foundation; either version 2.1 of the
       8     License, or (at your option) any later version.
       9  
      10     This file 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 Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public License
      16     along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
      17  
      18  /* Written by Paul Eggert */
      19  
      20  /* Tell gcc not to warn about the (i < 0) test, below.  */
      21  #if (__GNUC__ == 4 && 3 <= __GNUC_MINOR__) || 4 < __GNUC__
      22  # pragma GCC diagnostic ignored "-Wtype-limits"
      23  #elif defined __clang__
      24  # pragma clang diagnostic ignored "-Wtautological-compare"
      25  #endif
      26  
      27  #include <config.h>
      28  
      29  #include "inttostr.h"
      30  
      31  /* Convert I to a printable string in BUF, which must be at least
      32     INT_BUFSIZE_BOUND (INTTYPE) bytes long.  Return the address of the
      33     printable string, which need not start at BUF.  */
      34  
      35  _GL_ATTRIBUTE_NODISCARD char *
      36  anytostr (inttype i, char *buf)
      37  {
      38    char *p = buf + INT_STRLEN_BOUND (inttype);
      39    *p = 0;
      40  
      41    if (i < 0)
      42      {
      43        do
      44          *--p = '0' - i % 10;
      45        while ((i /= 10) != 0);
      46  
      47        *--p = '-';
      48      }
      49    else
      50      {
      51        do
      52          *--p = '0' + i % 10;
      53        while ((i /= 10) != 0);
      54      }
      55  
      56    return p;
      57  }