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-rw-r--r--lib/erl_interface/src/legacy/decode_term.c142
1 files changed, 142 insertions, 0 deletions
diff --git a/lib/erl_interface/src/legacy/decode_term.c b/lib/erl_interface/src/legacy/decode_term.c
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+++ b/lib/erl_interface/src/legacy/decode_term.c
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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"
+#include "erl_interface.h"
+
+/*
+ * This file is actually part of the erl_interface library,
+ * not the newer 'ei' library. The header file is still in "ei.h"
+ */
+
+/* FIXME: is this to be completed? */
+
+#if (0)
+int ei_decode_term(const char *buf, int *index, void *t)
+{
+ const char *s = buf + *index;
+ const char *s0 = s;
+
+ if (t) {
+ ETERM *tmp;
+
+ /* this decodes and advances s */
+ if (!(tmp = erl_decode_buf((unsigned char **)&s))) return -1;
+
+ *(ETERM **)t = tmp;
+ *index += s - s0;
+
+ return 0;
+ }
+ else {
+ int tmpindex = *index;
+ long ttype;
+ int arity;
+ int i;
+
+ /* these are all the external types */
+ switch ((ttype = get8(s))) {
+ case ERL_SMALL_INTEGER_EXT:
+ case ERL_INTEGER_EXT:
+ case ERL_SMALL_BIG_EXT:
+ return ei_decode_long(buf,index,NULL);
+
+ case ERL_FLOAT_EXT:
+ return ei_decode_double(buf,index,NULL);
+
+ case ERL_ATOM_EXT:
+ return ei_decode_atom(buf,index,NULL);
+
+ case ERL_REFERENCE_EXT:
+ case ERL_NEW_REFERENCE_EXT:
+ return ei_decode_ref(buf,index,NULL);
+
+ case ERL_PORT_EXT:
+ return ei_decode_port(buf,index,NULL);
+
+ case ERL_PID_EXT:
+ return ei_decode_pid(buf,index,NULL);
+
+ case ERL_SMALL_TUPLE_EXT:
+ case ERL_LARGE_TUPLE_EXT:
+ if (ei_decode_tuple_header(buf,index,&arity) < 0)
+ return -1;
+
+ for (i=0; i<arity; i++) {
+ if (ei_decode_term(buf,index,NULL)) {
+ /* restore possibly changed index before returning */
+ *index = tmpindex;
+ return -1;
+ }
+ }
+ return 0;
+
+ case ERL_STRING_EXT:
+ return ei_decode_string(buf,index,NULL);
+
+ case ERL_LIST_EXT:
+ case ERL_NIL_EXT:
+ if (ei_decode_list_header(buf,index,&arity) < 0)
+ return -1;
+
+ if (arity) {
+ for (i=0; i<arity; i++) {
+ if (ei_decode_term(buf,index,NULL) < 0) {
+ /* restore possibly changed index before returning */
+ *index = tmpindex;
+ return -1;
+ }
+ }
+ if (ei_decode_list_header(buf,index,&arity) < 0) {
+ *index = tmpindex;
+ return -1;
+ }
+ }
+ return 0;
+
+ case ERL_BINARY_EXT:
+ return ei_decode_binary(buf,index,NULL,NULL);
+
+ case ERL_LARGE_BIG_EXT:
+ default:
+ break;
+ }
+ }
+
+ return -1;
+}
+#else
+int ei_decode_term(const char *buf, int *index, void *t)
+{
+ const char *s = buf + *index;
+ const char *s0 = s;
+ ETERM *tmp;
+
+ /* this decodes and advances s */
+ if (!(tmp = erl_decode_buf((unsigned char **)&s))) return -1;
+
+ if (t) *(ETERM **)t = tmp;
+ else erl_free_term(tmp);
+
+ *index += s - s0;
+
+ return 0;
+}
+#endif