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/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 1998-2016. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions 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, i;
const char tag = get8(s);
switch (tag) {
case ERL_REFERENCE_EXT:
if (p) {
if (get_atom(&s, p->node, NULL) < 0) return -1;
p->n[0] = get32be(s);
p->len = 1;
p->creation = get8(s) & 0x03;
}
else {
if (get_atom(&s, NULL, NULL) < 0) return -1;
s += 5;
}
*index += s-s0;
return 0;
break;
case ERL_NEW_REFERENCE_EXT:
case ERL_NEWER_REFERENCE_EXT:
/* first the integer count */
count = get16be(s);
if (p) {
p->len = count;
if (get_atom(&s, p->node, NULL) < 0) return -1;
if (tag == ERL_NEW_REFERENCE_EXT)
p->creation = get8(s) & 0x03;
else
p->creation = get32be(s);
}
else {
if (get_atom(&s, NULL, NULL) < 0) return -1;
s += (tag == ERL_NEW_REFERENCE_EXT ? 1 : 4);
}
/* 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;
}
}
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