src/libs/bsd/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  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by Christos Zoulas.
  16  * 4. The name of the author may not be used to endorse or promote products
  17  *    derived from this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
  20  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  21  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  23  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <stdio.h>
  33 #include <string.h>
  34 #include <err.h>
  35 #include <stdlib.h>
  36 #include <stringlist.h>
  37
  38 #define _SL_CHUNKSIZE   20
  39
  40 /*
  41  * sl_init(): Initialize a string list
  42  */
  43 StringList *
  44 sl_init()
  45 {
  46         StringList *sl;
  47
  48         sl = malloc(sizeof(StringList));
  49         if (sl == NULL)
  50                 err(1, "stringlist: %m");
  51
  52         sl->sl_cur = 0;
  53         sl->sl_max = _SL_CHUNKSIZE;
  54         sl->sl_str = malloc(sl->sl_max * sizeof(char *));
  55         if (sl->sl_str == NULL)
  56                 err(1, "stringlist: %m");
  57         return sl;
  58 }
  59
  60
  61 /*
  62  * sl_add(): Add an item to the string list
  63  */
  64 int
  65 sl_add(sl, name)
  66         StringList *sl;
  67         char *name;
  68 {
  69         if (sl->sl_cur == sl->sl_max - 1) {
  70                 char **string;
  71
  72                 sl->sl_max += _SL_CHUNKSIZE;
  73
  74                 string = realloc(sl->sl_str, sl->sl_max * sizeof(char *));
  75                 if (string == NULL)
  76                         return (-1);
  77
  78                 sl->sl_str = string;
  79         }
  80         sl->sl_str[sl->sl_cur++] = name;
  81         return (0);
  82 }
  83
  84
  85 /*
  86  * sl_free(): Free a stringlist
  87  */
  88 void
  89 sl_free(sl, all)
  90         StringList *sl;
  91         int all;
  92 {
  93         size_t i;
  94
  95         if (sl == NULL)
  96                 return;
  97         if (sl->sl_str) {
  98                 if (all)
  99                         for (i = 0; i < sl->sl_cur; i++)
 100                                 free(sl->sl_str[i]);
 101                 free(sl->sl_str);
 102         }
 103         free(sl);
 104 }
 105
 106
 107 /*
 108  * sl_find(): Find a name in the string list
 109  */
 110 char *
 111 sl_find(sl, name)
 112         StringList *sl;
 113         char *name;
 114 {
 115         size_t i;
 116
 117         for (i = 0; i < sl->sl_cur; i++)
 118                 if (strcmp(sl->sl_str[i], name) == 0)
 119                         return sl->sl_str[i];
 120
 121         return NULL;
 122 }