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/* A "buffer" utility type.
Copyright (C) 1998 Free Software Foundation, Inc.
This file is part of GNU CC.
GNU CC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU CC 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU CC; see the file COPYING. If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
/* Written by Per Bothner <bothner@cygnus.com>, July 1998. */
#include "config.h"
#include "system.h"
#include "gansidecl.h"
#include "buffer.h"
/* Grow BUFP so there is room for at least SIZE more bytes. */
void
buffer_grow (bufp, size)
struct buffer *bufp;
int size;
{
if (bufp->limit - bufp->ptr >= size)
return;
if (bufp->data == 0)
{
if (size < 120)
size = 120;
bufp->data = (unsigned char*) xmalloc (size);
bufp->ptr = bufp->data;
}
else
{
int index = bufp->ptr - bufp->data;
size += 2 * (bufp->limit - bufp->data);
bufp->data = (unsigned char *) xrealloc (bufp->data, size);
bufp->ptr = bufp->data + index;
}
bufp->limit = bufp->data + size;
}
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