lib/libc/gen/stringlist.c

   1 /*
   2  * Copyright (c) 1994 Christos Zoulas
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 4. The name of the author may not be used to endorse or promote products
  14  *    derived from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
  17  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  18  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  20  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  *
  28  * $NetBSD: stringlist.c,v 1.2 1997/01/17 07:26:20 lukem Exp $
  29  * $FreeBSD: src/lib/libc/gen/stringlist.c,v 1.8 2007/01/09 00:27:55 imp Exp $
  30  * $DragonFly: src/lib/libc/gen/stringlist.c,v 1.3 2005/11/13 00:07:42 swildner Exp $
  31  */
  32
  33 #include "namespace.h"
  34 #include <stdio.h>
  35 #include <string.h>
  36 #include <err.h>
  37 #include <stdlib.h>
  38 #include <stringlist.h>
  39 #include "un-namespace.h"
  40
  41 #define _SL_CHUNKSIZE   20
  42
  43 /*
  44  * sl_init(): Initialize a string list
  45  */
  46 StringList *
  47 sl_init(void)
  48 {
  49         StringList *sl;
  50
  51         sl = malloc(sizeof(StringList));
  52         if (sl == NULL)
  53                 _err(1, "stringlist: %m");
  54
  55         sl->sl_cur = 0;
  56         sl->sl_max = _SL_CHUNKSIZE;
  57         sl->sl_str = malloc(sl->sl_max * sizeof(char *));
  58         if (sl->sl_str == NULL)
  59                 _err(1, "stringlist: %m");
  60         return sl;
  61 }
  62
  63
  64 /*
  65  * sl_add(): Add an item to the string list
  66  */
  67 int
  68 sl_add(StringList *sl, char *name)
  69 {
  70         if (sl->sl_cur == sl->sl_max - 1) {
  71                 sl->sl_max += _SL_CHUNKSIZE;
  72                 sl->sl_str = reallocf(sl->sl_str, sl->sl_max * sizeof(char *));
  73                 if (sl->sl_str == NULL)
  74                         return (-1);
  75         }
  76         sl->sl_str[sl->sl_cur++] = name;
  77         return (0);
  78 }
  79
  80
  81 /*
  82  * sl_free(): Free a stringlist
  83  */
  84 void
  85 sl_free(StringList *sl, int all)
  86 {
  87         size_t i;
  88
  89         if (sl == NULL)
  90                 return;
  91         if (sl->sl_str) {
  92                 if (all)
  93                         for (i = 0; i < sl->sl_cur; i++)
  94                                 free(sl->sl_str[i]);
  95                 free(sl->sl_str);
  96         }
  97         free(sl);
  98 }
  99
 100
 101 /*
 102  * sl_find(): Find a name in the string list
 103  */
 104 char *
 105 sl_find(StringList *sl, char *name)
 106 {
 107         size_t i;
 108
 109         for (i = 0; i < sl->sl_cur; i++)
 110                 if (strcmp(sl->sl_str[i], name) == 0)
 111                         return sl->sl_str[i];
 112
 113         return NULL;
 114 }