93 lines
3.6 KiB
C
93 lines
3.6 KiB
C
/*-
|
|
* Copyright (c) 1988, 1989, 1990, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
* 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 8.2 (Berkeley) 4/28/95
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef buf_h_a61a6812
|
|
#define buf_h_a61a6812
|
|
|
|
/*-
|
|
* buf.h --
|
|
* Header for users of the buf library.
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
|
|
#include "sprite.h"
|
|
|
|
/*
|
|
* There are several places where expandable buffers are used (parse.c and
|
|
* var.c). This constant is merely the starting point for those buffers. If
|
|
* lines tend to be much shorter than this, it would be best to reduce BSIZE.
|
|
* If longer, it should be increased. Reducing it will cause more copying to
|
|
* be done for longer lines, but will save space for shorter ones. In any
|
|
* case, it ought to be a power of two simply because most storage allocation
|
|
* schemes allocate in powers of two.
|
|
*/
|
|
#define MAKE_BSIZE 256 /* starting size for expandable buffers */
|
|
|
|
#define BUF_ERROR 256
|
|
|
|
typedef char Byte;
|
|
|
|
typedef struct Buffer {
|
|
size_t size; /* Current size of the buffer */
|
|
size_t 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)
|
|
|
|
void Buf_OvAddByte(Buffer *, Byte);
|
|
void Buf_AddBytes(Buffer *, size_t, const Byte *);
|
|
Byte *Buf_GetAll(Buffer *, size_t *);
|
|
void Buf_Discard(Buffer *, size_t);
|
|
size_t Buf_Size(Buffer *);
|
|
Buffer *Buf_Init(size_t);
|
|
void Buf_Destroy(Buffer *, Boolean);
|
|
void Buf_ReplaceLastByte(Buffer *, Byte);
|
|
|
|
#endif /* buf_h_a61a6812 */
|