mp: use referenced values when composing CFL object

When creating a CFL object from a MessagePack buffer, now the strings and bytes
data types are created as references, that means we don't copy the data to the
new buffer.

This change has been made for performance reasons by using the updated CFL
library v0.5.0.

Signed-off-by: Eduardo Silva <[email protected]>

src/flb_mp.c

@@ -757,7 +757,7 @@ static int mp_object_to_cfl(void **ptr, msgpack_object *o)
         break;
     case MSGPACK_OBJECT_STR:
         var = cfl_variant_create_from_string_s((char *) o->via.str.ptr,
-                                               o->via.str.size);
+                                               o->via.str.size, CFL_TRUE);
         if (!var) {
             return -1;
         }
@@ -766,7 +766,7 @@ static int mp_object_to_cfl(void **ptr, msgpack_object *o)
         break;
     case MSGPACK_OBJECT_BIN:
         var = cfl_variant_create_from_bytes((char *) o->via.str.ptr,
-                                            o->via.str.size);
+                                            o->via.str.size, CFL_TRUE);
         if (!var) {
             return -1;
         }
@@ -945,17 +945,17 @@ static int mp_cfl_to_msgpack(struct cfl_variant *var,
             /* we don't save references */
             break;
         case CFL_VARIANT_STRING:
-            msgpack_pack_str(mp_pck, cfl_sds_len(var->data.as_string));
+            msgpack_pack_str(mp_pck, cfl_variant_size_get(var));
             msgpack_pack_str_body(mp_pck,
-                                  var->data.as_string, cfl_sds_len(var->data.as_string));
+                                  var->data.as_string, cfl_variant_size_get(var));
             break;
         case CFL_VARIANT_BYTES:
-            msgpack_pack_bin(mp_pck, cfl_sds_len(var->data.as_bytes));
+            msgpack_pack_bin(mp_pck, cfl_variant_size_get(var));
             msgpack_pack_bin_body(mp_pck,
-                                  var->data.as_bytes, cfl_sds_len(var->data.as_bytes));
+                                  var->data.as_bytes, cfl_variant_size_get(var));
             break;
         case CFL_VARIANT_ARRAY:
-            msgpack_pack_array(mp_pck, var->data.as_array->entry_count);
+        msgpack_pack_array(mp_pck, var->data.as_array->entry_count);
             for (i = 0; i < var->data.as_array->entry_count; i++) {
                 variant = var->data.as_array->entries[i];
                 ret = mp_cfl_to_msgpack(variant, mp_sbuf, mp_pck);