cn-create: add cn_cbor_double_create

include/cn-cbor/cn-cbor.h

diff --git a/include/cn-cbor/cn-cbor.h b/include/cn-cbor/cn-cbor.h
index bf71af8..cde9dfc 100644
--- a/include/cn-cbor/cn-cbor.h
+++ b/include/cn-cbor/cn-cbor.h
@@ -1,3 +1,4 @@
+
 /**
  * \file
  * \brief
@@ -324,6 +325,20 @@
                             CBOR_CONTEXT,
                             cn_cbor_errback *errp);
 
+#ifndef CBOR_NO_FLOAT
+/**
+ * Create a CBOR double.
+ *
+ * @param[in]   value    the value of the double
+ * @param[in]   CBOR_CONTEXT Allocation context (only if USE_CBOR_CONTEXT is defined)
+ * @param[out]  errp         Error, if NULL is returned
+ * @return                   The created object, or NULL on error
+ */
+cn_cbor* cn_cbor_double_create(double value
+                               CBOR_CONTEXT,
+                               cn_cbor_errback *errp);
+#endif /* CBOR_NO_FLOAT */
+
 /**
  * Put a CBOR object into a map with a CBOR object key.  Duplicate checks are NOT
  * currently performed.

src/cn-create.c

diff --git a/src/cn-create.c b/src/cn-create.c
index bc448e9..84a6ee9 100644
--- a/src/cn-create.c
+++ b/src/cn-create.c
@@ -73,6 +73,21 @@
   return ret;
 }
 
+#ifndef CBOR_NO_FLOAT
+cn_cbor* cn_cbor_double_create(double value
+                               CBOR_CONTEXT,
+                               cn_cbor_errback *errp)
+{
+  cn_cbor* ret;
+  INIT_CB(ret);
+
+  ret->type = CN_CBOR_DOUBLE;
+  ret->v.dbl = value;
+
+  return ret;
+}
+#endif /* CBOR_NO_FLOAT */
+
 static bool _append_kv(cn_cbor *cb_map, cn_cbor *key, cn_cbor *val)
 {
   //Connect key and value and insert them into the map.