/* A "buffer" utility type. Copyright (C) 1998, 2000, 2003 Free Software Foundation, Inc. This file is part of GCC. GCC 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. GCC 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 GCC; see the file COPYING. If not, write to the Free Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ /* Written by Per Bothner <bothner@cygnus.com>, July 1998. */ /* A simple data structure for an expandable buffer. */ struct buffer { /* The start of the actual data buffer. */ unsigned char *data; /* Where to write next in the buffer. */ unsigned char *ptr; /* The end of the allocated data buffer. */ unsigned char *limit; }; #define NULL_BUFFER { (void*) 0, (void*) 0, (void*) 0 } #define BUFFER_INIT(BUFP) \ ((BUFP)->data = NULL, (BUFP)->ptr = NULL, (BUFP)->limit = NULL) #define BUFFER_LENGTH(BUFP) ((BUFP)->ptr - (BUFP)->data) #define BUFFER_RESET(BUFP) ((BUFP)->ptr = (BUFP)->data) extern void buffer_grow (struct buffer*, int);