spaces.c revision 1.1.1.7
1/* Allocate memory region filled with spaces. 2 Copyright (C) 1991-2019 Free Software Foundation, Inc. 3 4This file is part of the libiberty library. 5Libiberty is free software; you can redistribute it and/or 6modify it under the terms of the GNU Library General Public 7License as published by the Free Software Foundation; either 8version 2 of the License, or (at your option) any later version. 9 10Libiberty is distributed in the hope that it will be useful, 11but WITHOUT ANY WARRANTY; without even the implied warranty of 12MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13Library General Public License for more details. 14 15You should have received a copy of the GNU Library General Public 16License along with libiberty; see the file COPYING.LIB. If 17not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, 18Boston, MA 02110-1301, USA. */ 19 20/* 21 22@deftypefn Extension char* spaces (int @var{count}) 23 24Returns a pointer to a memory region filled with the specified 25number of spaces and null terminated. The returned pointer is 26valid 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. */ 43extern PTR malloc (size_t); 44extern void free (PTR); 45#endif 46 47const char * 48spaces (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 70