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Diffstat (limited to 'buf.h')
| -rw-r--r-- | buf.h | 119 |
1 files changed, 119 insertions, 0 deletions
@@ -0,0 +1,119 @@ +/* $NetBSD: buf.h,v 1.17 2012/04/24 20:26:58 sjg Exp $ */ + +/* + * Copyright (c) 1988, 1989, 1990 The Regents of the University of California. + * + * 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. 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 + */ + +/* + * 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 + +typedef char Byte; + +typedef struct Buffer { + int size; /* Current size of the buffer */ + int count; /* Number of bytes in buffer */ + Byte *buffer; /* The buffer itself (zero terminated) */ +} Buffer; + +/* If we aren't on netbsd, __predict_false() might not be defined. */ +#ifndef __predict_false +#define __predict_false(x) (x) +#endif + +/* Buf_AddByte adds a single byte to a buffer. */ +#define Buf_AddByte(bp, byte) do { \ + int _count = ++(bp)->count; \ + char *_ptr; \ + if (__predict_false(_count >= (bp)->size)) \ + Buf_Expand_1(bp); \ + _ptr = (bp)->buffer + _count; \ + _ptr[-1] = (byte); \ + _ptr[0] = 0; \ + } while (0) + +#define BUF_ERROR 256 + +#define Buf_Size(bp) ((bp)->count) + +void Buf_Expand_1(Buffer *); +void Buf_AddBytes(Buffer *, int, const Byte *); +Byte *Buf_GetAll(Buffer *, int *); +void Buf_Empty(Buffer *); +void Buf_Init(Buffer *, int); +Byte *Buf_Destroy(Buffer *, Boolean); +Byte *Buf_DestroyCompact(Buffer *); + +#endif /* _BUF_H */ |