| /* 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 "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; |
| } |