ident.c
1.64 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
#include <stdlib.h>
#include <mailutils/types.h>
#include <mailutils/assoc.h>
#include <mailutils/locus.h>
#include <mailutils/error.h>
#include <mailutils/errno.h>
#include <mailutils/diag.h>
#include <mailutils/list.h>
struct mu_ident_ref
{
size_t count;
};
static mu_assoc_t nametab;
int
mu_ident_ref (char const *name, char const **refname)
{
int rc;
struct mu_ident_ref *ref, **refptr;
if (!refname)
return MU_ERR_OUT_PTR_NULL;
if (!name)
{
*refname = NULL;
return 0;
}
if (!nametab)
{
rc = mu_assoc_create (&nametab, 0);
if (rc)
{
mu_diag_funcall (MU_DIAG_ERROR, "mu_assoc_create", NULL, rc);
return rc;
}
mu_assoc_set_destroy_item (nametab, mu_list_free_item);
}
rc = mu_assoc_install_ref2 (nametab, name, &refptr, refname);
switch (rc)
{
case 0:
ref = malloc (sizeof *ref);
if (!ref)
{
rc = errno;
mu_assoc_remove (nametab, name);
return rc;
}
*refptr = ref;
ref->count = 0;
break;
case MU_ERR_EXISTS:
ref = *refptr;
break;
default:
mu_diag_funcall (MU_DIAG_ERROR, "mu_assoc_install_ref2", name, rc);
return rc;
}
ref->count++;
return 0;
}
int
mu_ident_deref (char const *name)
{
struct mu_ident_ref *ref;
int rc;
if (!name || !nametab)
return 0;
rc = mu_assoc_lookup (nametab, name, &ref);
switch (rc)
{
case 0:
if (--ref->count == 0)
mu_assoc_remove (nametab, name);
break;
case MU_ERR_NOENT:
break;
default:
mu_diag_funcall (MU_DIAG_ERROR, "mu_assoc_lookup", name, rc);
return rc;
}
return 0;
}