binutils-gdb/libiberty/spaces.c

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/* Allocate memory region filled with spaces.
Copyright (C) 1991-2017 Free Software Foundation, Inc.
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This file is part of the libiberty library.
Libiberty is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
Libiberty is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with libiberty; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
Boston, MA 02110-1301, USA. */
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/*
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@deftypefn Extension char* spaces (int @var{count})
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Returns a pointer to a memory region filled with the specified
number of spaces and null terminated. The returned pointer is
valid until at least the next call.
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@end deftypefn
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*/
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#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
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#include "ansidecl.h"
#include "libiberty.h"
#if VMS
#include <stdlib.h>
#include <unixlib.h>
#else
/* For systems with larger pointers than ints, these must be declared. */
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extern PTR malloc (size_t);
extern void free (PTR);
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#endif
const char *
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spaces (int count)
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{
register char *t;
static char *buf;
static int maxsize;
if (count > maxsize)
{
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free (buf);
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buf = (char *) malloc (count + 1);
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if (buf == (char *) 0)
return 0;
for (t = buf + count ; t != buf ; )
{
*--t = ' ';
}
maxsize = count;
buf[count] = '\0';
}
return (const char *) (buf + maxsize - count);
}