dynlist.c revision 8db30ca8 
1/* dynlist.c: Dynamic lists and buffers in C.
2 * created 1999-Jan-06 15:34 jmk
3 * autodate: 1999-Dec-24 00:12
4 *
5 * by Jim Knoble <jmknoble@pobox.com>
6 * Copyright � 1999 Jim Knoble
7 *
8 * Disclaimer:
9 *
10 * The software is provided "as is", without warranty of any kind,
11 * express or implied, including but not limited to the warranties of
12 * merchantability, fitness for a particular purpose and
13 * noninfringement. In no event shall the author(s) be liable for any
14 * claim, damages or other liability, whether in an action of
15 * contract, tort or otherwise, arising from, out of or in connection
16 * with the software or the use or other dealings in the software.
17 *
18 * Permission to use, copy, modify, distribute, and sell this software
19 * and its documentation for any purpose is hereby granted without
20 * fee, provided that the above copyright notice appear in all copies
21 * and that both that copyright notice and this permission notice
22 * appear in supporting documentation.
23 */
24
25#include <stdio.h>
26#include <stdlib.h>
27
28#include "dynlist.h"
29
30#define LIST_CHUNK_SIZE		512
31#define BUF_CHUNK_SIZE		512
32
33/* For lists of pointers cast to char *. */
34int append_to_list(char ***list_ptr, int *list_len, int *i, char *item)
35{
36   char **tmp_ptr;
37
38   if (*i >= *list_len)
39    {
40       *list_len += LIST_CHUNK_SIZE;
41       tmp_ptr = realloc(*list_ptr, (sizeof(**list_ptr) * *list_len));
42       if (NULL == tmp_ptr)
43	{
44	   return(APPEND_FAILURE);
45	}
46       *list_ptr = tmp_ptr;
47    }
48   (*list_ptr)[*i] = item;
49   (*i)++;
50   return(APPEND_SUCCESS);
51}
52
53/* For single-dimensional buffers. */
54int append_to_buf(char **buf, int *buflen, int *i, int c)
55{
56   char *tmp_buf;
57
58   if (*i >= *buflen)
59    {
60       *buflen += BUF_CHUNK_SIZE;
61       tmp_buf = realloc(*buf, (sizeof(**buf) * *buflen));
62       if (NULL == tmp_buf)
63	{
64	   return(APPEND_FAILURE);
65	}
66       *buf = tmp_buf;
67#ifdef DEBUG
68       printf("-->Allocated buffer of size %d\n", *buflen);
69#endif /* DEBUG */
70    }
71   (*buf)[*i] = (char) c;
72   (*i)++;
73   return(APPEND_SUCCESS);
74}
75
76