47 lines
1.4 KiB
C
47 lines
1.4 KiB
C
/* A "buffer" utility type.
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Copyright (C) 1998, 2000, 2003 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GCC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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/* Written by Per Bothner <bothner@cygnus.com>, July 1998. */
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/* A simple data structure for an expandable buffer. */
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struct buffer
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{
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/* The start of the actual data buffer. */
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unsigned char *data;
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/* Where to write next in the buffer. */
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unsigned char *ptr;
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/* The end of the allocated data buffer. */
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unsigned char *limit;
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};
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#define NULL_BUFFER { (void*) 0, (void*) 0, (void*) 0 }
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#define BUFFER_INIT(BUFP) \
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((BUFP)->data = NULL, (BUFP)->ptr = NULL, (BUFP)->limit = NULL)
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#define BUFFER_LENGTH(BUFP) ((BUFP)->ptr - (BUFP)->data)
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#define BUFFER_RESET(BUFP) ((BUFP)->ptr = (BUFP)->data)
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extern void buffer_grow (struct buffer*, int);
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