1 /* $NetBSD: buf.h,v 1.8 1999/09/15 04:16:31 mycroft Exp $ */ 2 3 /* 4 * Copyright (c) 1988, 1989, 1990 The Regents of the University of California. 5 * Copyright (c) 1988, 1989 by Adam de Boor 6 * Copyright (c) 1989 by Berkeley Softworks 7 * All rights reserved. 8 * 9 * This code is derived from software contributed to Berkeley by 10 * Adam de Boor. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * from: @(#)buf.h 8.1 (Berkeley) 6/6/93 41 */ 42 43 /*- 44 * buf.h -- 45 * Header for users of the buf library. 46 */ 47 48 #ifndef _BUF_H 49 #define _BUF_H 50 51 #include "sprite.h" 52 53 typedef char Byte; 54 55 typedef struct Buffer { 56 int size; /* Current size of the buffer */ 57 int left; /* Space left (== size - (inPtr - buffer)) */ 58 Byte *buffer; /* The buffer itself */ 59 Byte *inPtr; /* Place to write to */ 60 Byte *outPtr; /* Place to read from */ 61 } *Buffer; 62 63 /* Buf_AddByte adds a single byte to a buffer. */ 64 #define Buf_AddByte(bp, byte) \ 65 (void) (--(bp)->left <= 0 ? Buf_OvAddByte(bp, byte), 1 : \ 66 (*(bp)->inPtr++ = (byte), *(bp)->inPtr = 0), 1) 67 68 #define BUF_ERROR 256 69 70 void Buf_OvAddByte __P((Buffer, int)); 71 void Buf_AddBytes __P((Buffer, int, const Byte *)); 72 Byte *Buf_GetAll __P((Buffer, int *)); 73 void Buf_Discard __P((Buffer, int)); 74 int Buf_Size __P((Buffer)); 75 Buffer Buf_Init __P((int)); 76 void Buf_Destroy __P((Buffer, Boolean)); 77 void Buf_ReplaceLastByte __P((Buffer, int)); 78 79 #endif /* _BUF_H */ 80