property.c
4.6 KB
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
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
GNU Mailutils is free software; you can redistribute it and/or modify
it under the terms of the GNU General Library Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU Mailutils 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 Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with GNU Mailutils; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#include <property0.h>
#undef min
#define min(a,b) ((a) < (b) ? (a) : (b))
static int property_find __P ((property_t, const char *,
struct property_item **));
int
property_create (property_t *pp, void *owner)
{
property_t prop;
if (pp == NULL)
return EINVAL;
prop = calloc (1, sizeof *prop);
if (prop == NULL)
return ENOMEM;
monitor_create (&prop->lock, 0, prop);
prop->owner = owner;
*pp = prop;
return 0;
}
void
property_destroy (property_t *pp, void *owner)
{
if (pp && *pp)
{
property_t prop = *pp;
if (prop->owner == owner)
{
struct property_item *item, *cur;
/* Destroy the list and is properties. */
monitor_wrlock (prop->lock);
for (item = prop->items; item; item = cur)
{
if (item->key)
free (item->key);
if (item->value)
free (item->value);
cur = item->next;
free (item);
}
monitor_unlock (prop->lock);
monitor_destroy (&prop->lock, prop);
free (prop);
}
*pp = NULL;
}
}
void *
property_get_owner (property_t prop)
{
return (prop == NULL) ? NULL : prop->owner;
}
int
property_set_value (property_t prop, const char *key, const char *value,
int overwrite)
{
struct property_item *item;
int status = property_find (prop, key, &item);
if (status != 0)
return status;
if (item->set)
{
if (overwrite)
{
item->set = 0;
if (item->value)
free (item->value);
item->value = NULL;
if (value)
{
item->set = 1;
item->value = strdup (value);
if (item->value == NULL)
status = ENOMEM;
}
}
}
else
{
item->set = 1;
if (item->value)
free (item->value);
if (value)
{
item->value = strdup (value);
if (item->value == NULL)
status = ENOMEM;
}
}
return status;
}
int
property_get_value (property_t prop, const char *key, char *buffer,
size_t buflen, size_t *n)
{
struct property_item *item = NULL;
int status;
size_t len;
status = property_find (prop, key, &item);
if (status != 0)
return status;
len = (item->value) ? strlen (item->value) : 0;
if (buffer && buflen != 0)
{
buflen--;
len = min (buflen, len);
strncpy (buffer, item->value, len)[len] = '\0';
}
if (n)
*n = len;
return 0;
}
int
property_set (property_t prop, const char *k)
{
struct property_item *item = NULL;
int status = property_find (prop, k, &item);
if (status != 0)
return status;
item->set = 1;
return 0;
}
int
property_unset (property_t prop, const char *k)
{
struct property_item *item = NULL;
int status = property_find (prop, k, &item);
if (status != 0)
return status;
item->set = 0;
return 0;
}
int
property_is_set (property_t prop, const char *k)
{
struct property_item *item = NULL;
int status = property_find (prop, k, &item);
if (status != 0)
return 0;
return item->set;
}
static int
property_find (property_t prop, const char *key, struct property_item **item)
{
size_t len = 0;
struct property_item *cur = NULL;
if (prop == NULL || key == NULL)
return EINVAL;
monitor_wrlock (prop->lock);
for (len = strlen (key), cur = prop->items; cur; cur = cur->next)
{
if (strlen (cur->key) == len && !strcmp (key, cur->key))
break;
}
if (cur == NULL)
{
cur = calloc (1, sizeof *cur);
if (cur == NULL)
{
monitor_unlock (prop->lock);
return ENOMEM;
}
cur->key = strdup (key);
if (cur->key == NULL)
{
monitor_unlock (prop->lock);
free (cur);
return ENOMEM;
}
cur->next = prop->items;
prop->items = cur;
}
*item = cur;
monitor_unlock (prop->lock);
return 0;
}