libiberty/spaces.c

   1 /* Allocate memory region filled with spaces.
   2    Copyright (C) 1991 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., 59 Temple Place - Suite 330,
  18 Boston, MA 02111-1307, USA.  */
  19
  20 /*
  21
  22 NAME
  23
  24         spaces -- return a pointer to a buffer full of spaces
  25
  26 SYNOPSIS
  27
  28         char *spaces (int count)
  29
  30 DESCRIPTION
  31
  32         Returns a pointer to a memory region filled with the specified
  33         number of spaces and null terminated.  The returned pointer is
  34         valid until at least the next call.
  35
  36 BUGS
  37
  38 */
  39
  40 #include "ansidecl.h"
  41 #include "libiberty.h"
  42
  43 #if VMS
  44 #include <stdlib.h>
  45 #include <unixlib.h>
  46 #else
  47 /* For systems with larger pointers than ints, these must be declared.  */
  48 extern PTR malloc PARAMS ((size_t));
  49 extern void free PARAMS ((PTR));
  50 #endif
  51
  52 const char *
  53 spaces (count)
  54   int count;
  55 {
  56   register char *t;
  57   static char *buf;
  58   static int maxsize;
  59
  60   if (count > maxsize)
  61     {
  62       if (buf)
  63         {
  64           free (buf);
  65         }
  66       buf = malloc (count + 1);
  67       if (buf == (char *) 0)
  68         return 0;
  69       for (t = buf + count ; t != buf ; )
  70         {
  71           *--t = ' ';
  72         }
  73       maxsize = count;
  74       buf[count] = '\0';
  75     }
  76   return (const char *) (buf + maxsize - count);
  77 }
  78