usr/src/cmd/man/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 /*
  30  * Copyright 2012 Nexenta Systems, Inc. All rights reserved.
  31  */
  32
  33 #include <err.h>
  34 #include <stdio.h>
  35 #include <stdlib.h>
  36 #include <string.h>
  37
  38 #include "stringlist.h"
  39
  40 #define _SL_CHUNKSIZE   20
  41
  42 stringlist *
  43 sl_init(void)
  44 {
  45         stringlist      *sl;
  46
  47         if ((sl = malloc(sizeof (stringlist))) == NULL)
  48                 err(1, "malloc");
  49
  50         sl->sl_cur = 0;
  51         sl->sl_max = _SL_CHUNKSIZE;
  52         sl->sl_str = malloc(sl->sl_max * sizeof (char *));
  53         if (sl->sl_str == NULL)
  54                 err(1, "malloc");
  55
  56         return (sl);
  57 }
  58
  59 int
  60 sl_add(stringlist *sl, char *name)
  61 {
  62
  63         if (sl->sl_cur == sl->sl_max - 1) {
  64                 sl->sl_max += _SL_CHUNKSIZE;
  65                 sl->sl_str = realloc(sl->sl_str, sl->sl_max * sizeof (char *));
  66                 if (sl->sl_str == NULL)
  67                         return (-1);
  68         }
  69         sl->sl_str[sl->sl_cur++] = name;
  70
  71         return (0);
  72 }
  73
  74
  75 void
  76 sl_free(stringlist *sl, int all)
  77 {
  78         size_t i;
  79
  80         if (sl == NULL)
  81                 return;
  82         if (sl->sl_str) {
  83                 if (all)
  84                         for (i = 0; i < sl->sl_cur; i++)
  85                                 free(sl->sl_str[i]);
  86                 free(sl->sl_str);
  87         }
  88         free(sl);
  89 }
  90
  91
  92 char *
  93 sl_find(stringlist *sl, char *name)
  94 {
  95         size_t  i;
  96
  97         for (i = 0; i < sl->sl_cur; i++)
  98                 if (strcmp(sl->sl_str[i], name) == 0)
  99                         return (sl->sl_str[i]);
 100
 101         return (NULL);
 102 }