compat_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
  29 #if defined(LIBC_SCCS) && !defined(lint)
  30 static char *rcsid = "$NetBSD: stringlist.c,v 1.2 1997/01/17 07:26:20 lukem Exp $";
  31 #endif /* LIBC_SCCS and not lint */
  32 #include <sys/cdefs.h>
  33 __FBSDID("$FreeBSD$");
  34
  35 #include "namespace.h"
  36 #include <stdio.h>
  37 #include <string.h>
  38 #include <err.h>
  39 #include <stdlib.h>
  40 #include <stringlist.h>
  41 #include "un-namespace.h"
  42
  43 #define _SL_CHUNKSIZE   20
  44
  45 /*
  46  * sl_init(): Initialize a string list
  47  */
  48 StringList *
  49 sl_init(void)
  50 {
  51         StringList *sl;
  52
  53         sl = malloc(sizeof(StringList));
  54         if (sl == NULL)
  55                 _err(1, "stringlist: %m");
  56
  57         sl->sl_cur = 0;
  58         sl->sl_max = _SL_CHUNKSIZE;
  59         sl->sl_str = malloc(sl->sl_max * sizeof(char *));
  60         if (sl->sl_str == NULL)
  61                 _err(1, "stringlist: %m");
  62         return sl;
  63 }
  64
  65
  66 /*
  67  * sl_add(): Add an item to the string list
  68  */
  69 int
  70 sl_add(StringList *sl, char *name)
  71 {
  72         if (sl->sl_cur == sl->sl_max - 1) {
  73                 sl->sl_max += _SL_CHUNKSIZE;
  74                 sl->sl_str = reallocf(sl->sl_str, sl->sl_max * sizeof(char *));
  75                 if (sl->sl_str == NULL)
  76                         return (-1);
  77         }
  78         sl->sl_str[sl->sl_cur++] = name;
  79         return (0);
  80 }
  81
  82
  83 /*
  84  * sl_free(): Free a stringlist
  85  */
  86 void
  87 sl_free(StringList *sl, int all)
  88 {
  89         size_t i;
  90
  91         if (sl == NULL)
  92                 return;
  93         if (sl->sl_str) {
  94                 if (all)
  95                         for (i = 0; i < sl->sl_cur; i++)
  96                                 free(sl->sl_str[i]);
  97                 free(sl->sl_str);
  98         }
  99         free(sl);
 100 }
 101
 102
 103 /*
 104  * sl_find(): Find a name in the string list
 105  */
 106 char *
 107 sl_find(StringList *sl, const char *name)
 108 {
 109         size_t i;
 110
 111         for (i = 0; i < sl->sl_cur; i++)
 112                 if (strcmp(sl->sl_str[i], name) == 0)
 113                         return sl->sl_str[i];
 114
 115         return NULL;
 116 }