1 /* $NetBSD: buf.h,v 1.48 2023/06/01 07:44:10 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 /* Automatically growing null-terminated buffers of characters. */ 76 77 #ifndef MAKE_BUF_H 78 #define MAKE_BUF_H 79 80 #include <stddef.h> 81 82 /* An automatically growing null-terminated buffer of characters. */ 83 typedef struct Buffer { 84 size_t cap; /* Allocated size of the buffer, including the '\0' */ 85 size_t len; /* Number of bytes in buffer, excluding the '\0' */ 86 char *data; /* The buffer itself (always null-terminated) */ 87 } Buffer; 88 89 void Buf_Expand(Buffer *); 90 91 /* Mark the buffer as empty, so it can be filled with data again. */ 92 MAKE_INLINE void 93 Buf_Clear(Buffer *buf) 94 { 95 buf->len = 0; 96 buf->data[0] = '\0'; 97 } 98 99 /* Buf_AddByte adds a single byte to a buffer. */ 100 MAKE_INLINE void 101 Buf_AddByte(Buffer *buf, char byte) 102 { 103 size_t old_len = buf->len++; 104 char *end; 105 if (old_len + 1 >= buf->cap) 106 Buf_Expand(buf); 107 end = buf->data + old_len; 108 end[0] = byte; 109 end[1] = '\0'; 110 } 111 112 MAKE_INLINE bool MAKE_ATTR_USE 113 Buf_EndsWith(const Buffer *buf, char ch) 114 { 115 return buf->len > 0 && buf->data[buf->len - 1] == ch; 116 } 117 118 void Buf_AddBytes(Buffer *, const char *, size_t); 119 void Buf_AddRange(Buffer *, const char *, const char *); 120 void Buf_AddStr(Buffer *, const char *); 121 void Buf_AddInt(Buffer *, int); 122 void Buf_AddFlag(Buffer *, bool, const char *); 123 void Buf_Init(Buffer *); 124 void Buf_InitSize(Buffer *, size_t); 125 void Buf_Done(Buffer *); 126 char *Buf_DoneData(Buffer *) MAKE_ATTR_USE; 127 char *Buf_DoneDataCompact(Buffer *) MAKE_ATTR_USE; 128 129 #endif 130