1  /* Allocate memory region filled with spaces.
       2     Copyright (C) 1991-2023 Free Software Foundation, Inc.
       3  
       4  This file is part of the libiberty library.
       5  Libiberty is free software; you can redistribute it and/or
       6  modify it under the terms of the GNU Library General Public
       7  License as published by the Free Software Foundation; either
       8  version 2 of the License, or (at your option) any later version.
       9  
      10  Libiberty 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 GNU
      13  Library General Public License for more details.
      14  
      15  You should have received a copy of the GNU Library General Public
      16  License along with libiberty; see the file COPYING.LIB.  If
      17  not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
      18  Boston, MA 02110-1301, USA.  */
      19  
      20  /*
      21  
      22  @deftypefn Extension char* spaces (int @var{count})
      23  
      24  Returns a pointer to a memory region filled with the specified
      25  number of spaces and null terminated.  The returned pointer is
      26  valid until at least the next call.
      27  
      28  @end deftypefn
      29  
      30  */
      31  
      32  #ifdef HAVE_CONFIG_H
      33  #include "config.h"
      34  #endif
      35  #include "ansidecl.h"
      36  #include "libiberty.h"
      37  
      38  #if VMS
      39  #include <stdlib.h>
      40  #include <unixlib.h>
      41  #else
      42  /* For systems with larger pointers than ints, these must be declared.  */
      43  extern void *malloc (size_t);
      44  extern void free (void *);
      45  #endif
      46  
      47  const char *
      48  spaces (int count)
      49  {
      50    register char *t;
      51    static char *buf;
      52    static int maxsize;
      53  
      54    if (count > maxsize)
      55      {
      56        free (buf);
      57        buf = (char *) malloc (count + 1);
      58        if (buf == (char *) 0)
      59  	return 0;
      60        for (t = buf + count ; t != buf ; )
      61  	{
      62  	  *--t = ' ';
      63  	}
      64        maxsize = count;
      65        buf[count] = '\0';
      66      }
      67    return (const char *) (buf + maxsize - count);
      68  }
      69