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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 "eidef.h"
#include "putget.h"
int ei_decode_trace(const char *buf, int *index, erlang_trace *p)
{
int arity = 0;
int tindex = *index; /* use a temporary index if any function should fail */
long *p_flags, *p_label, *p_serial, *p_prev;
erlang_pid *p_from;
if (p != NULL) {
p_flags = &p->flags;
p_label = &p->label;
p_serial = &p->serial;
p_prev = &p->prev;
p_from = &p->from;
}
else {
p_flags = p_label = p_serial = p_prev = NULL;
p_from = NULL;
}
/* { Flags, Label, Serial, FromPid, Prev } */
if (ei_decode_tuple_header(buf, &tindex, &arity)
|| (arity != 5)
|| ei_decode_long(buf, &tindex, p_flags)
|| ei_decode_long(buf, &tindex, p_label)
|| ei_decode_long(buf, &tindex, p_serial)
|| ei_decode_pid( buf, &tindex, p_from)
|| ei_decode_long(buf, &tindex, p_prev)) return -1;
/* index is updated by the functions we called */
*index = tindex;
return 0;
}
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