1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
|
/*
* hfsutils - tools for reading and writing Macintosh HFS volumes
* Copyright (C) 1996-1998 Robert Leslie
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Id: dlist.c,v 1.7 1998/11/02 22:08:27 rob Exp $
*/
# ifdef HAVE_CONFIG_H
# include "config.h"
# endif
# include <stdlib.h>
# include <string.h>
# include "dlist.h"
/*
* NAME: dlist->init()
* DESCRIPTION: initialize a new dynamic list
*/
int dl_init(dlist *list)
{
list->memsz = 100;
list->mem = malloc(list->memsz);
if (list->mem == 0)
return -1;
list->eltend = (char **) list->mem;
list->strs = list->mem + list->memsz;
return 0;
}
/*
* NAME: dlist->free()
* DESCRIPTION: dispose of a dynamic list
*/
void dl_free(dlist *list)
{
free(list->mem);
}
/*
* NAME: dlist->array()
* DESCRIPTION: return the array of strings in a list; can dispose with free()
*/
char **dl_array(dlist *list)
{
return (char **) list->mem;
}
/*
* NAME: dlist->size()
* DESCRIPTION: return the number of strings in a list
*/
int dl_size(dlist *list)
{
return list->eltend - (char **) list->mem;
}
/*
* NAME: dlist->append()
* DESCRIPTION: insert a string to the end of a list
*/
int dl_append(dlist *list, const char *str)
{
size_t len;
len = strlen(str) + 1;
/* make sure there is room */
if (sizeof(char *) + len > (size_t) (list->strs - (char *) list->eltend))
{
dlist newlist;
size_t strsz;
char **elt;
strsz = (list->mem + list->memsz) - list->strs;
newlist.memsz = list->memsz * 2 + sizeof(char *) + len;
newlist.mem = malloc(newlist.memsz);
if (newlist.mem == 0)
return -1;
newlist.eltend = (char **) newlist.mem;
newlist.strs = newlist.mem + newlist.memsz - strsz;
memcpy(newlist.strs, list->strs, strsz);
for (elt = (char **) list->mem; elt < list->eltend; ++elt)
*newlist.eltend++ = newlist.strs + (*elt - list->strs);
free(list->mem);
*list = newlist;
}
list->strs -= len;
strcpy(list->strs, str);
*list->eltend++ = list->strs;
return 0;
}
|
