1 /* $NetBSD: stringlist.c,v 1.15 2022/03/12 17:31:39 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 1994, 1999 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Christos Zoulas. 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #if defined(LIBC_SCCS) && !defined(lint) 34 __RCSID("$NetBSD: stringlist.c,v 1.15 2022/03/12 17:31:39 christos Exp $"); 35 #endif /* LIBC_SCCS and not lint */ 36 37 #include "namespace.h" 38 39 #include <assert.h> 40 #include <err.h> 41 #include <errno.h> 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <string.h> 45 #include <stringlist.h> 46 47 #ifdef __weak_alias 48 __weak_alias(sl_add,_sl_add) 49 __weak_alias(sl_find,_sl_find) 50 __weak_alias(sl_free,_sl_free) 51 __weak_alias(sl_init,_sl_init) 52 __weak_alias(sl_delete,_sl_delete) 53 #endif 54 55 #define _SL_CHUNKSIZE 20 56 57 /* 58 * sl_init(): Initialize a string list 59 */ 60 StringList * 61 sl_init(void) 62 { 63 StringList *sl; 64 65 sl = malloc(sizeof(StringList)); 66 if (sl == NULL) 67 return NULL; 68 69 sl->sl_cur = 0; 70 sl->sl_max = _SL_CHUNKSIZE; 71 sl->sl_str = NULL; 72 errno = reallocarr(&sl->sl_str, sl->sl_max, sizeof(*sl->sl_str)); 73 if (errno) { 74 int serrno = errno; 75 free(sl); 76 errno = serrno; 77 sl = NULL; 78 } 79 return sl; 80 } 81 82 83 /* 84 * sl_add(): Add an item to the string list 85 */ 86 int 87 sl_add(StringList *sl, char *name) 88 { 89 90 _DIAGASSERT(sl != NULL); 91 92 if (sl->sl_cur == sl->sl_max - 1) { 93 char **new = sl->sl_str; 94 95 errno = reallocarr(&new, (sl->sl_max + _SL_CHUNKSIZE), 96 sizeof(*new)); 97 if (errno) 98 return -1; 99 sl->sl_max += _SL_CHUNKSIZE; 100 sl->sl_str = new; 101 } 102 sl->sl_str[sl->sl_cur++] = name; 103 return 0; 104 } 105 106 107 /* 108 * sl_free(): Free a stringlist 109 */ 110 void 111 sl_free(StringList *sl, int all) 112 { 113 size_t i; 114 115 if (sl == NULL) 116 return; 117 if (sl->sl_str) { 118 if (all) 119 for (i = 0; i < sl->sl_cur; i++) 120 free(sl->sl_str[i]); 121 free(sl->sl_str); 122 } 123 free(sl); 124 } 125 126 127 /* 128 * sl_find(): Find a name in the string list 129 */ 130 char * 131 sl_find(StringList *sl, const char *name) 132 { 133 size_t i; 134 135 _DIAGASSERT(sl != NULL); 136 137 for (i = 0; i < sl->sl_cur; i++) 138 if (strcmp(sl->sl_str[i], name) == 0) 139 return sl->sl_str[i]; 140 141 return NULL; 142 } 143 144 int 145 sl_delete(StringList *sl, const char *name, int all) 146 { 147 size_t i, j; 148 149 for (i = 0; i < sl->sl_cur; i++) 150 if (strcmp(sl->sl_str[i], name) == 0) { 151 if (all) 152 free(sl->sl_str[i]); 153 for (j = i + 1; j < sl->sl_cur; j++) 154 sl->sl_str[j - 1] = sl->sl_str[j]; 155 sl->sl_str[--sl->sl_cur] = NULL; 156 return 0; 157 } 158 return -1; 159 } 160 161