| 1 | /* |
| 2 | * Copyright (c) 1988, 1989, 1990 The Regents of the University of California. |
| 3 | * Copyright (c) 1988, 1989 by Adam de Boor |
| 4 | * Copyright (c) 1989 by Berkeley Softworks |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * This code is derived from software contributed to Berkeley by |
| 8 | * Adam de Boor. |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or without |
| 11 | * modification, are permitted provided that the following conditions |
| 12 | * are met: |
| 13 | * 1. Redistributions of source code must retain the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer. |
| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer in the |
| 17 | * documentation and/or other materials provided with the distribution. |
| 18 | * 3. All advertising materials mentioning features or use of this software |
| 19 | * must display the following acknowledgement: |
| 20 | * This product includes software developed by the University of |
| 21 | * California, Berkeley and its contributors. |
| 22 | * 4. Neither the name of the University nor the names of its contributors |
| 23 | * may be used to endorse or promote products derived from this software |
| 24 | * without specific prior written permission. |
| 25 | * |
| 26 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 27 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 28 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 29 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 30 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 31 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 32 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 33 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 34 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 35 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 36 | * SUCH DAMAGE. |
| 37 | * |
| 38 | * from: @(#)buf.h 8.1 (Berkeley) 6/6/93 |
| 39 | * $FreeBSD: src/usr.bin/make/buf.h,v 1.9 1999/08/28 01:03:26 peter Exp $ |
| 40 | * $DragonFly: src/usr.bin/make/buf.h,v 1.3 2003/11/03 19:31:30 eirikn Exp $ |
| 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(Buffer, int); |
| 71 | void Buf_AddBytes(Buffer, int, const Byte *); |
| 72 | void Buf_UngetByte(Buffer, int); |
| 73 | void Buf_UngetBytes(Buffer, int, Byte *); |
| 74 | int Buf_GetByte(Buffer); |
| 75 | int Buf_GetBytes(Buffer, int, Byte *); |
| 76 | Byte *Buf_GetAll(Buffer, int *); |
| 77 | void Buf_Discard(Buffer, int); |
| 78 | int Buf_Size(Buffer); |
| 79 | Buffer Buf_Init(int); |
| 80 | void Buf_Destroy(Buffer, Boolean); |
| 81 | void Buf_ReplaceLastByte(Buffer, int); |
| 82 | |
| 83 | #endif /* _BUF_H */ |