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/* 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);
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