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- /*
- * 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.
- *
- * @(#)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 unsigned 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;
-
- Buffer Buf_Init(); /* Initialize a buffer */
- void Buf_Destroy(); /* Destroy a buffer */
- void Buf_AddBytes(); /* Add a range of bytes to a buffer */
- int Buf_GetByte(); /* Get a byte from a buffer */
- int Buf_GetBytes(); /* Get multiple bytes */
- void Buf_UngetByte(); /* Push a byte back into the buffer */
- void Buf_UngetBytes(); /* Push many bytes back into the buf */
- Byte *Buf_GetAll(); /* Get them all */
- void Buf_Discard(); /* Throw away some of the bytes */
- int Buf_Size(); /* See how many are there */
-
- /* Buf_AddByte adds a single byte to a buffer. */
- #define Buf_AddByte(bp, byte) \
- (--(bp)->left <= 0 ? Buf_OvAddByte(bp, byte) : \
- (void)(*(bp)->inPtr++ = (byte), *(bp)->inPtr = 0))
-
- void Buf_OvAddByte(); /* adds a byte when buffer overflows */
-
- #define BUF_ERROR 256
-
- #endif _BUF_H
-