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
|
/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 1998-2009. All Rights Reserved.
*
* The contents of this file are subject to the Erlang Public License,
* Version 1.1, (the "License"); you may not use this file except in
* compliance with the License. You should have received a copy of the
* Erlang Public License along with this software. If not, it can be
* retrieved online at http://www.erlang.org/.
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and limitations
* under the License.
*
* %CopyrightEnd%
*/
#include <string.h>
#include "eidef.h"
#include "eiext.h"
#include "putget.h"
int ei_decode_ref(const char *buf, int *index, erlang_ref *p)
{
const char *s = buf + *index;
const char *s0 = s;
int count, len, i;
switch (get8(s)) {
case ERL_REFERENCE_EXT:
/* first the nodename */
if (get8(s) != ERL_ATOM_EXT) return -1;
len = get16be(s);
if (len > MAXATOMLEN) return -1;
if (p) {
memmove(p->node, s, len);
p->node[len] = (char)0;
}
s += len;
/* now the numbers: num (4), creation (1) */
if (p) {
p->n[0] = get32be(s);
p->len = 1;
p->creation = get8(s) & 0x03;
}
else s += 5;
*index += s-s0;
return 0;
break;
case ERL_NEW_REFERENCE_EXT:
/* first the integer count */
count = get16be(s);
if (p) p->len = count;
/* then the nodename */
if (get8(s) != ERL_ATOM_EXT) return -1;
len = get16be(s);
if (len > MAXATOMLEN) return -1;
if (p) {
memmove(p->node, s, len);
p->node[len] = (char)0;
}
s += len;
/* creation */
if (p) {
p->creation = get8(s) & 0x03;
}
else s += 1;
/* finally the id integers */
if (p) {
for (i = 0; (i<count) && (i<3); i++) {
p->n[i] = get32be(s);
}
}
else s += 4 * count;
*index += s-s0;
return 0;
break;
default:
return -1;
}
}
|
