1 files changed, 149 insertions, 0 deletions
diff --git a/lib/erl_interface/src/misc/get_type.c b/lib/erl_interface/src/misc/get_type.c
new file mode 100644
index 0000000000..d67a6a80d3
--- /dev/null
+++ b/lib/erl_interface/src/misc/get_type.c
@@ -0,0 +1,149 @@
+/*
+ * %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;
+}
+
+