diff options
Diffstat (limited to 'lib/erl_interface/src/decode/decode_intlist.c')
-rw-r--r-- | lib/erl_interface/src/decode/decode_intlist.c | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/lib/erl_interface/src/decode/decode_intlist.c b/lib/erl_interface/src/decode/decode_intlist.c new file mode 100644 index 0000000000..65552a4ed4 --- /dev/null +++ b/lib/erl_interface/src/decode/decode_intlist.c @@ -0,0 +1,82 @@ +/* + * %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% + */ +/* since Erlang sends int-lists as either lists or strings, this + * function can be used when the caller needs an array but doesn't + * know which type to decode + */ +#include "eidef.h" +#include "eiext.h" +#include "putget.h" + +int ei_decode_intlist(const char *buf, int *index, long *a, int *count) +{ + const unsigned char *s = (const unsigned char *)(buf + *index); + const unsigned char *s0 = s; + int idx; + int len; + int i; + + switch (get8(s)) { + case ERL_STRING_EXT: + len = get16be(s); + + /* transfer and cast chars one at a time into array */ + if (a) { + for (i=0; i<len; i++) { + a[i] = (long)(s[i]); + } + } + if (count) *count = len; + s += len; + break; + + case ERL_LIST_EXT: + len = get32be(s); + idx = 0; + + if (a) { + for (i=0; i<len; i++) { + if (ei_decode_long((char*)s,&idx,a+i) < 0) { + if (count) *count = i; + return -1; + } + } + } + else { + for (i=0; i<len; i++) { + if (ei_decode_long((char*)s,&idx,NULL) < 0) { + if (count) *count = i; + return -1; + } + } + } + + if (count) *count = len; + s += idx; + break; + + default: + return -1; + } + + + *index += s-s0; + + return 0; +} |