1 /* $NetBSD: buf.h,v 1.25 2020/08/13 04:25:09 rillig Exp $ */ 2 3 /* 4 * Copyright (c) 1988, 1989, 1990 The Regents of the University of California. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * Adam de Boor. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * from: @(#)buf.h 8.1 (Berkeley) 6/6/93 34 */ 35 36 /* 37 * Copyright (c) 1988, 1989 by Adam de Boor 38 * Copyright (c) 1989 by Berkeley Softworks 39 * All rights reserved. 40 * 41 * This code is derived from software contributed to Berkeley by 42 * Adam de Boor. 43 * 44 * Redistribution and use in source and binary forms, with or without 45 * modification, are permitted provided that the following conditions 46 * are met: 47 * 1. Redistributions of source code must retain the above copyright 48 * notice, this list of conditions and the following disclaimer. 49 * 2. Redistributions in binary form must reproduce the above copyright 50 * notice, this list of conditions and the following disclaimer in the 51 * documentation and/or other materials provided with the distribution. 52 * 3. All advertising materials mentioning features or use of this software 53 * must display the following acknowledgement: 54 * This product includes software developed by the University of 55 * California, Berkeley and its contributors. 56 * 4. Neither the name of the University nor the names of its contributors 57 * may be used to endorse or promote products derived from this software 58 * without specific prior written permission. 59 * 60 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 61 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 62 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 63 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 64 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 65 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 66 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 67 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 68 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 69 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 70 * SUCH DAMAGE. 71 * 72 * from: @(#)buf.h 8.1 (Berkeley) 6/6/93 73 */ 74 75 /*- 76 * buf.h -- 77 * Automatically growing null-terminated buffer of characters. 78 */ 79 80 #ifndef MAKE_BUF_H 81 #define MAKE_BUF_H 82 83 #include <stddef.h> 84 85 typedef struct Buffer { 86 size_t size; /* Current size of the buffer */ 87 size_t count; /* Number of bytes in buffer */ 88 char *buffer; /* The buffer itself (zero terminated) */ 89 } Buffer; 90 91 /* If we aren't on NetBSD, __predict_false() might not be defined. */ 92 #ifndef __predict_false 93 #define __predict_false(x) (x) 94 #endif 95 96 void Buf_Expand_1(Buffer *); 97 98 /* Buf_AddByte adds a single byte to a buffer. */ 99 static inline void 100 Buf_AddByte(Buffer *bp, char byte) 101 { 102 size_t count = ++bp->count; 103 char *ptr; 104 if (__predict_false(count >= bp->size)) 105 Buf_Expand_1(bp); 106 ptr = bp->buffer + count; 107 ptr[-1] = byte; 108 ptr[0] = 0; 109 } 110 111 static inline size_t 112 Buf_Size(const Buffer *bp) 113 { 114 return bp->count; 115 } 116 117 void Buf_AddBytes(Buffer *, const char *, size_t); 118 void Buf_AddBytesBetween(Buffer *, const char *, const char *); 119 void Buf_AddStr(Buffer *, const char *); 120 void Buf_AddInt(Buffer *, int); 121 char *Buf_GetAll(Buffer *, size_t *); 122 void Buf_Empty(Buffer *); 123 void Buf_Init(Buffer *, size_t); 124 char *Buf_Destroy(Buffer *, Boolean); 125 char *Buf_DestroyCompact(Buffer *); 126 127 #endif /* MAKE_BUF_H */ 128