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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 "eiext.h"
#include "putget.h"
/* report type identifier from the start of the buffer */
/* for types with meaningful length attributes, return the length too.
In other cases, return length 0 */
int ei_get_type(const char *buf, const int *index, int *type, int *len)
{
const char *s = buf + *index;
*type = get8(s);
switch (*type) {
case ERL_SMALL_ATOM_EXT:
case ERL_SMALL_ATOM_UTF8_EXT:
*type = ERL_ATOM_EXT;
case ERL_SMALL_TUPLE_EXT:
*len = get8(s);
break;
case ERL_ATOM_UTF8_EXT:
*type = ERL_ATOM_EXT;
case ERL_ATOM_EXT:
case ERL_STRING_EXT:
*len = get16be(s);
break;
case ERL_FLOAT_EXT:
case NEW_FLOAT_EXT:
*type = ERL_FLOAT_EXT;
break;
case ERL_LARGE_TUPLE_EXT:
case ERL_LIST_EXT:
case ERL_MAP_EXT:
case ERL_BINARY_EXT:
case ERL_BIT_BINARY_EXT:
*len = get32be(s);
break;
case ERL_SMALL_BIG_EXT:
*len = get8(s); /* #digit_bytes */
break;
case ERL_LARGE_BIG_EXT:
*len = get32be(s); /* #digit_bytes */
break;
case ERL_NEW_PID_EXT:
*type = ERL_PID_EXT;
break;
case ERL_NEW_PORT_EXT:
*type = ERL_PORT_EXT;
break;
case ERL_NEWER_REFERENCE_EXT:
*type = ERL_NEW_REFERENCE_EXT;
break;
default:
*len = 0;
break;
}
/* leave index unchanged */
return 0;
}
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