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/* $OpenBSD: buf.h,v 1.11 1999/12/16 17:02:45 espie Exp $ */
/* $NetBSD: buf.h,v 1.7 1996/12/31 17:53:22 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 8.1 (Berkeley) 6/6/93
*/
/*-
* buf.h --
* Header for users of the buf library.
*/
#ifndef _BUF_H
#define _BUF_H
#include "sprite.h"
typedef struct Buffer_ {
char *buffer; /* The buffer itself. */
char *inPtr; /* Place to write to. */
char *endPtr; /* End of allocated space. */
} BUFFER;
typedef BUFFER *Buffer;
/* Internal support for Buf_AddChar. */
void BufOverflow __P((Buffer));
/* User interface */
/* Buf_AddChar -- Add a single char to buffer. */
#define Buf_AddChar(bp, byte) \
do { \
if ((bp)->endPtr - (bp)->inPtr <= 1) \
BufOverflow(bp); \
*(bp)->inPtr++ = (byte); \
} while (0)
#define BUF_ERROR 256
/* Buf_AddChars -- Add a number of chars to the buffer. */
void Buf_AddChars __P((Buffer, size_t, const char *));
/* Buf_Reset -- Remove all chars from a buffer. */
#define Buf_Reset(bp) ((void)((bp)->inPtr = (bp)->buffer))
/* Buf_AddSpace -- Add a space to buffer. */
#define Buf_AddSpace(b) Buf_AddChar((b), ' ')
/* Buf_AddString -- Add the contents of a NULL terminated string to buffer. */
#define Buf_AddString(b, s) Buf_AddChars((b), strlen(s), (s))
/* Buf_AddInterval -- Add characters between pointers s and e to buffer. */
#define Buf_AddInterval(b, s, e) Buf_AddChars((b), (e) - (s), (s))
/* Buf_Retrieve -- Retrieve data from a buffer, as a NULL terminated string. */
#define Buf_Retrieve(bp) (*(bp)->inPtr = '\0', (bp)->buffer)
/* Buf_Size -- Return the number of chars in the given buffer.
* Doesn't include the null-terminating char. */
#define Buf_Size(bp) ((size_t)((bp)->inPtr - (bp)->buffer))
/* Buf_Init -- Initialize a buffer. If no initial size is given,
* a reasonable default is used. */
void Buf_Init __P((Buffer, size_t));
/* Buf_Destroy -- Nuke a buffer and all its resources. */
void Buf_Destroy __P((Buffer));
/* Buf_ReplaceLastChar -- Replace the last char in a buffer. */
void Buf_ReplaceLastChar __P((Buffer, char));
#endif /* _BUF_H */
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