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/* $NetBSD: buf.h,v 1.5 1995/06/14 15:18:53 christos Exp $ */
/*
* Copyright (c) 1988, 1989, 1990 The Regents of the University of California.
* Copyright (c) 1988, 1989 by Adam de Boor
* Copyright (c) 1989 by Berkeley Softworks
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Adam de Boor.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* from: @(#)buf.h 5.4 (Berkeley) 12/28/90
*/
/*-
* buf.h --
* Header for users of the buf library.
*/
#ifndef _BUF_H
#define _BUF_H
#include "sprite.h"
typedef char Byte;
typedef struct Buffer {
int size; /* Current size of the buffer */
int left; /* Space left (== size - (inPtr - buffer)) */
Byte *buffer; /* The buffer itself */
Byte *inPtr; /* Place to write to */
Byte *outPtr; /* Place to read from */
} *Buffer;
/* Buf_AddByte adds a single byte to a buffer. */
#define Buf_AddByte(bp, byte) \
(void) (--(bp)->left <= 0 ? Buf_OvAddByte(bp, byte), 1 : \
(*(bp)->inPtr++ = (byte), *(bp)->inPtr = 0), 1)
#define BUF_ERROR 256
void Buf_OvAddByte __P((Buffer, int));
void Buf_AddBytes __P((Buffer, int, Byte *));
void Buf_UngetByte __P((Buffer, int));
void Buf_UngetBytes __P((Buffer, int, Byte *));
int Buf_GetByte __P((Buffer));
int Buf_GetBytes __P((Buffer, int, Byte *));
Byte *Buf_GetAll __P((Buffer, int *));
void Buf_Discard __P((Buffer, int));
int Buf_Size __P((Buffer));
Buffer Buf_Init __P((int));
void Buf_Destroy __P((Buffer, Boolean));
#endif /* _BUF_H */
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