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/*
* %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 "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 */
/* FIXME working on this one.... */
int ei_get_type(const char *buf, const int *index, int *type, int *len)
{
return ei_get_type_internal(buf, index, type, len);
}
#if 0
int ei_get_type(const char *buf, const int *index, int *type, int *len)
{
const char *s = buf + *index;
int itype = get8(s); /* Internal type */
*len = 0;
switch (*type) {
case ERL_SMALL_INTEGER_EXT:
case ERL_INTEGER_EXT:
case ERL_SMALL_BIG_EXT:
case ERL_LARGE_BIG_EXT:
*type = EI_TYPE_INTEGER;
break;
case ERL_FLOAT_EXT:
*type = EI_TYPE_FLOAT;
break;
case ERL_SMALL_TUPLE_EXT:
*len = get8(s);
break;
case ERL_ATOM_EXT:
case ERL_STRING_EXT:
*len = get16be(s);
break;
case ERL_LARGE_TUPLE_EXT:
case ERL_LIST_EXT:
case ERL_BINARY_EXT:
*len = get32be(s);
break;
case ERL_SMALL_BIG_EXT:
*len = (get8(s)+1)/2; /* big arity */
break;
case ERL_LARGE_BIG_EXT:
*len = (get32be(s)+1)/2; /* big arity */
break;
case ERL_BINARY_EXT:
*type = EI_TYPE_BINARY;
break;
case ERL_PID_EXT:
*type = EI_TYPE_PID;
break;
case ERL_PORT_EXT:
*type = EI_TYPE_PORT;
break;
case ERL_REFERENCE_EXT:
case ERL_NEW_REFERENCE_EXT:
*type = EI_TYPE_REF;
break;
default:
break;
}
/* leave index unchanged */
return 0;
}
#endif
/* Old definition of function above */
int ei_get_type_internal(const char *buf, const int *index,
int *type, int *len)
{
const char *s = buf + *index;
*type = get8(s);
switch (*type) {
case ERL_SMALL_TUPLE_EXT:
*len = get8(s);
break;
case ERL_ATOM_EXT:
case ERL_STRING_EXT:
*len = get16be(s);
break;
case ERL_LARGE_TUPLE_EXT:
case ERL_LIST_EXT:
case ERL_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;
default:
*len = 0;
break;
}
/* leave index unchanged */
return 0;
}
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