4 * Copyright (c) 1988, 1989, 1990, 1993
5 * The Regents of the University of California. All rights reserved.
6 * Copyright (c) 1988, 1989 by Adam de Boor
7 * Copyright (c) 1989 by Berkeley Softworks
10 * This code is derived from software contributed to Berkeley by
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. All advertising materials mentioning features or use of this software
22 * must display the following acknowledgement:
23 * This product includes software developed by the University of
24 * California, Berkeley and its contributors.
25 * 4. Neither the name of the University nor the names of its contributors
26 * may be used to endorse or promote products derived from this software
27 * without specific prior written permission.
29 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
30 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
31 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
32 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
33 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
34 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
35 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
37 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
38 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
41 * from: @(#)buf.h 8.1 (Berkeley) 6/6/93
42 * $FreeBSD: src/usr.bin/make/buf.h,v 1.9 1999/08/28 01:03:26 peter Exp $
43 * $DragonFly: src/usr.bin/make/buf.h,v 1.22 2005/01/27 02:19:45 okumoto Exp $
48 * Header for users of the buf library.
51 #include <sys/types.h>
56 * There are several places where expandable buffers are used (parse.c and
57 * var.c). This constant is merely the starting point for those buffers. If
58 * lines tend to be much shorter than this, it would be best to reduce BSIZE.
59 * If longer, it should be increased. Reducing it will cause more copying to
60 * be done for longer lines, but will save space for shorter ones. In any
61 * case, it ought to be a power of two simply because most storage allocation
62 * schemes allocate in powers of two.
64 #define MAKE_BSIZE 256 /* starting size for expandable buffers */
66 #define BUF_DEF_SIZE 256 /* Default buffer size */
67 #define BUF_ADD_INC 256 /* Expansion increment when Adding */
71 typedef struct Buffer {
72 size_t size; /* Current size of the buffer */
73 Byte *buf; /* The buffer itself */
74 Byte *end; /* Place to write to */
77 void Buf_AddByte(Buffer *, Byte);
78 void Buf_AddBytes(Buffer *, size_t, const Byte *);
79 Byte *Buf_GetAll(Buffer *, size_t *);
80 void Buf_Clear(Buffer *);
81 size_t Buf_Size(const Buffer *);
82 Buffer *Buf_Init(size_t);
83 void Buf_Destroy(Buffer *, Boolean);
84 void Buf_ReplaceLastByte(Buffer *, Byte);
86 #endif /* buf_h_a61a6812 */