2 * Copyright (c) 1988, 1989, 1990, 1993
3 * The Regents of the University of California. All rights reserved.
4 * Copyright (c) 1988, 1989 by Adam de Boor
5 * Copyright (c) 1989 by Berkeley Softworks
8 * This code is derived from software contributed to Berkeley by
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed by the University of
22 * California, Berkeley and its contributors.
23 * 4. Neither the name of the University nor the names of its contributors
24 * may be used to endorse or promote products derived from this software
25 * without specific prior written permission.
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39 * from: @(#)buf.h 8.1 (Berkeley) 6/6/93
40 * $FreeBSD: src/usr.bin/make/buf.h,v 1.9 1999/08/28 01:03:26 peter Exp $
41 * $DragonFly: src/usr.bin/make/buf.h,v 1.5 2004/11/12 22:42:36 dillon Exp $
46 * Header for users of the buf library.
56 typedef struct Buffer {
57 int size; /* Current size of the buffer */
58 int left; /* Space left (== size - (inPtr - buffer)) */
59 Byte *buffer; /* The buffer itself */
60 Byte *inPtr; /* Place to write to */
61 Byte *outPtr; /* Place to read from */
64 /* Buf_AddByte adds a single byte to a buffer. */
65 #define Buf_AddByte(bp, byte) \
66 (void) (--(bp)->left <= 0 ? Buf_OvAddByte(bp, byte), 1 : \
67 (*(bp)->inPtr++ = (byte), *(bp)->inPtr = 0), 1)
71 void Buf_OvAddByte(Buffer, int);
72 void Buf_AddBytes(Buffer, int, const Byte *);
73 void Buf_UngetByte(Buffer, int);
74 void Buf_UngetBytes(Buffer, int, Byte *);
75 int Buf_GetByte(Buffer);
76 int Buf_GetBytes(Buffer, int, Byte *);
77 Byte *Buf_GetAll(Buffer, int *);
78 void Buf_Discard(Buffer, int);
81 void Buf_Destroy(Buffer, Boolean);
82 void Buf_ReplaceLastByte(Buffer, int);