diff options
Diffstat (limited to 'lib/erl_interface/src/encode/encode_list_header.c')
-rw-r--r-- | lib/erl_interface/src/encode/encode_list_header.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/lib/erl_interface/src/encode/encode_list_header.c b/lib/erl_interface/src/encode/encode_list_header.c new file mode 100644 index 0000000000..27da70ae15 --- /dev/null +++ b/lib/erl_interface/src/encode/encode_list_header.c @@ -0,0 +1,45 @@ +/* + * %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" + +int ei_encode_list_header(char *buf, int *index, int arity) +{ + char *s = buf + *index; + char *s0 = s; + + if (arity < 0) return -1; + else if (arity > 0) { + if (!buf) s += 5; + else { + put8(s,ERL_LIST_EXT); + put32be(s,arity); + } + } + else { + /* empty list */ + if (!buf) s++; + else put8(s,ERL_NIL_EXT); + } + + *index += s-s0; + + return 0; +} |