1 /* $NetBSD: stringlist.c,v 1.12 2007/05/09 17:10:29 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 * 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 NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 #if defined(LIBC_SCCS) && !defined(lint) 41 __RCSID("$NetBSD: stringlist.c,v 1.12 2007/05/09 17:10:29 christos Exp $"); 42 #endif /* LIBC_SCCS and not lint */ 43 44 #include "namespace.h" 45 46 #include <assert.h> 47 #include <err.h> 48 #include <stdio.h> 49 #include <stdlib.h> 50 #include <string.h> 51 #include <stringlist.h> 52 53 #ifdef __weak_alias 54 __weak_alias(sl_add,_sl_add) 55 __weak_alias(sl_find,_sl_find) 56 __weak_alias(sl_free,_sl_free) 57 __weak_alias(sl_init,_sl_init) 58 __weak_alias(sl_delete,_sl_delete) 59 #endif 60 61 #define _SL_CHUNKSIZE 20 62 63 /* 64 * sl_init(): Initialize a string list 65 */ 66 StringList * 67 sl_init(void) 68 { 69 StringList *sl; 70 71 sl = malloc(sizeof(StringList)); 72 if (sl == NULL) 73 return NULL; 74 75 sl->sl_cur = 0; 76 sl->sl_max = _SL_CHUNKSIZE; 77 sl->sl_str = malloc(sl->sl_max * sizeof(char *)); 78 if (sl->sl_str == NULL) { 79 free(sl); 80 sl = NULL; 81 } 82 return sl; 83 } 84 85 86 /* 87 * sl_add(): Add an item to the string list 88 */ 89 int 90 sl_add(StringList *sl, char *name) 91 { 92 93 _DIAGASSERT(sl != NULL); 94 95 if (sl->sl_cur == sl->sl_max - 1) { 96 char **new; 97 98 new = realloc(sl->sl_str, 99 (sl->sl_max + _SL_CHUNKSIZE) * sizeof(char *)); 100 if (new == NULL) 101 return -1; 102 sl->sl_max += _SL_CHUNKSIZE; 103 sl->sl_str = new; 104 } 105 sl->sl_str[sl->sl_cur++] = name; 106 return 0; 107 } 108 109 110 /* 111 * sl_free(): Free a stringlist 112 */ 113 void 114 sl_free(StringList *sl, int all) 115 { 116 size_t i; 117 118 if (sl == NULL) 119 return; 120 if (sl->sl_str) { 121 if (all) 122 for (i = 0; i < sl->sl_cur; i++) 123 free(sl->sl_str[i]); 124 free(sl->sl_str); 125 } 126 free(sl); 127 } 128 129 130 /* 131 * sl_find(): Find a name in the string list 132 */ 133 char * 134 sl_find(StringList *sl, const char *name) 135 { 136 size_t i; 137 138 _DIAGASSERT(sl != NULL); 139 140 for (i = 0; i < sl->sl_cur; i++) 141 if (strcmp(sl->sl_str[i], name) == 0) 142 return sl->sl_str[i]; 143 144 return NULL; 145 } 146 147 int 148 sl_delete(StringList *sl, const char *name, int all) 149 { 150 size_t i, j; 151 152 for (i = 0; i < sl->sl_cur; i++) 153 if (strcmp(sl->sl_str[i], name) == 0) { 154 if (all) 155 free(sl->sl_str[i]); 156 for (j = i + 1; j < sl->sl_cur; j++) 157 sl->sl_str[j - 1] = sl->sl_str[j]; 158 sl->sl_str[--sl->sl_cur] = NULL; 159 return 0; 160 } 161 return -1; 162 } 163 164