1321964Ssjg/* $NetBSD: buf.h,v 1.19 2017/05/31 22:02:06 maya Exp $ */ 2236769Sobrien 3236769Sobrien/* 4236769Sobrien * Copyright (c) 1988, 1989, 1990 The Regents of the University of California. 5236769Sobrien * 6236769Sobrien * This code is derived from software contributed to Berkeley by 7236769Sobrien * Adam de Boor. 8236769Sobrien * 9236769Sobrien * Redistribution and use in source and binary forms, with or without 10236769Sobrien * modification, are permitted provided that the following conditions 11236769Sobrien * are met: 12236769Sobrien * 1. Redistributions of source code must retain the above copyright 13236769Sobrien * notice, this list of conditions and the following disclaimer. 14236769Sobrien * 2. Redistributions in binary form must reproduce the above copyright 15236769Sobrien * notice, this list of conditions and the following disclaimer in the 16236769Sobrien * documentation and/or other materials provided with the distribution. 17236769Sobrien * 3. Neither the name of the University nor the names of its contributors 18236769Sobrien * may be used to endorse or promote products derived from this software 19236769Sobrien * without specific prior written permission. 20236769Sobrien * 21236769Sobrien * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22236769Sobrien * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23236769Sobrien * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24236769Sobrien * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25236769Sobrien * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26236769Sobrien * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27236769Sobrien * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28236769Sobrien * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29236769Sobrien * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30236769Sobrien * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31236769Sobrien * SUCH DAMAGE. 32236769Sobrien * 33236769Sobrien * from: @(#)buf.h 8.1 (Berkeley) 6/6/93 34236769Sobrien */ 35236769Sobrien 36236769Sobrien/* 37236769Sobrien * Copyright (c) 1988, 1989 by Adam de Boor 38236769Sobrien * Copyright (c) 1989 by Berkeley Softworks 39236769Sobrien * All rights reserved. 40236769Sobrien * 41236769Sobrien * This code is derived from software contributed to Berkeley by 42236769Sobrien * Adam de Boor. 43236769Sobrien * 44236769Sobrien * Redistribution and use in source and binary forms, with or without 45236769Sobrien * modification, are permitted provided that the following conditions 46236769Sobrien * are met: 47236769Sobrien * 1. Redistributions of source code must retain the above copyright 48236769Sobrien * notice, this list of conditions and the following disclaimer. 49236769Sobrien * 2. Redistributions in binary form must reproduce the above copyright 50236769Sobrien * notice, this list of conditions and the following disclaimer in the 51236769Sobrien * documentation and/or other materials provided with the distribution. 52236769Sobrien * 3. All advertising materials mentioning features or use of this software 53236769Sobrien * must display the following acknowledgement: 54236769Sobrien * This product includes software developed by the University of 55236769Sobrien * California, Berkeley and its contributors. 56236769Sobrien * 4. Neither the name of the University nor the names of its contributors 57236769Sobrien * may be used to endorse or promote products derived from this software 58236769Sobrien * without specific prior written permission. 59236769Sobrien * 60236769Sobrien * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 61236769Sobrien * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 62236769Sobrien * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 63236769Sobrien * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 64236769Sobrien * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 65236769Sobrien * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 66236769Sobrien * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 67236769Sobrien * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 68236769Sobrien * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 69236769Sobrien * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 70236769Sobrien * SUCH DAMAGE. 71236769Sobrien * 72236769Sobrien * from: @(#)buf.h 8.1 (Berkeley) 6/6/93 73236769Sobrien */ 74236769Sobrien 75236769Sobrien/*- 76236769Sobrien * buf.h -- 77236769Sobrien * Header for users of the buf library. 78236769Sobrien */ 79236769Sobrien 80321964Ssjg#ifndef MAKE_BUF_H 81321964Ssjg#define MAKE_BUF_H 82236769Sobrien 83236769Sobrientypedef char Byte; 84236769Sobrien 85236769Sobrientypedef struct Buffer { 86236769Sobrien int size; /* Current size of the buffer */ 87236769Sobrien int count; /* Number of bytes in buffer */ 88236769Sobrien Byte *buffer; /* The buffer itself (zero terminated) */ 89236769Sobrien} Buffer; 90236769Sobrien 91236769Sobrien/* If we aren't on netbsd, __predict_false() might not be defined. */ 92236769Sobrien#ifndef __predict_false 93236769Sobrien#define __predict_false(x) (x) 94236769Sobrien#endif 95236769Sobrien 96236769Sobrien/* Buf_AddByte adds a single byte to a buffer. */ 97236769Sobrien#define Buf_AddByte(bp, byte) do { \ 98236769Sobrien int _count = ++(bp)->count; \ 99236769Sobrien char *_ptr; \ 100236769Sobrien if (__predict_false(_count >= (bp)->size)) \ 101236769Sobrien Buf_Expand_1(bp); \ 102236769Sobrien _ptr = (bp)->buffer + _count; \ 103236769Sobrien _ptr[-1] = (byte); \ 104236769Sobrien _ptr[0] = 0; \ 105236769Sobrien } while (0) 106236769Sobrien 107236769Sobrien#define BUF_ERROR 256 108236769Sobrien 109236769Sobrien#define Buf_Size(bp) ((bp)->count) 110236769Sobrien 111236769Sobrienvoid Buf_Expand_1(Buffer *); 112236769Sobrienvoid Buf_AddBytes(Buffer *, int, const Byte *); 113236769SobrienByte *Buf_GetAll(Buffer *, int *); 114236769Sobrienvoid Buf_Empty(Buffer *); 115236769Sobrienvoid Buf_Init(Buffer *, int); 116236769SobrienByte *Buf_Destroy(Buffer *, Boolean); 117236769SobrienByte *Buf_DestroyCompact(Buffer *); 118236769Sobrien 119321964Ssjg#endif /* MAKE_BUF_H */ 120