map gbp papi: match endianess of f64

clib_net_to_host_f64, clib_host_to_net_f64 are now implemented as '=',
https://gerrit.fd.io/r/#/c/20406/  set papi to match.
- all f64 api references are now wrapped with
  clib_net_to_host_f64 or clib_host_to_net_f64.

IEEE f64 endianess is not defined.  If clib_net_to_host_f64 and
clib_host_to_net_f64 are later defined in VPP as big-endian, it is
a single character change in the papi vpp_serializer.

Note: This breaks the api in a manner that would not be detected by
the flag day initiative.  The scope is small.  This only impacts map.api,
which applied the u64 transformation, while the gbp api uses '='.

The implementation of "=" raises issues for the papi socket implementation
if used between systems of differing endianess.  See Vratko's comments.

- Added get_f64_endian_value() to api to allow client to verify endianess of f64's.

Type: fix
Depends-on: https://gerrit.fd.io/r/#/c/20484/

Change-Id: I00fc64a6557ba0190398df211aa0ea5c7eb101df
Signed-off-by: Paul Vinciguerra <pvinci@vinciconsulting.com>

1 files changed, 38 insertions, 0 deletions

diff --git a/test/test_endian.py b/test/test_endian.py
new file mode 100644
index 00000000000..462ee2b6b57
--- /dev/null
+++ b/test/test_endian.py
@@ -0,0 +1,38 @@
+#  Copyright (c) 2019. Vinci Consulting Corp. All Rights Reserved.
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+
+import framework
+import vpp_papi_provider
+
+F64_ONE = 1.0
+
+
+class TestEndian(framework.VppTestCase):
+    """TestEndian"""
+
+    def test_f64_endian_value(self):
+        try:
+            rv = self.vapi.get_f64_endian_value(f64_one=F64_ONE)
+            self.assertEqual(rv.f64_one_result, F64_ONE,
+                             "client incorrectly deserializes f64 values.  "
+                             "Expected: %r. Received: %r." % (
+                                 F64_ONE, rv.f64_one_result))
+        except vpp_papi_provider.UnexpectedApiReturnValueError:
+            self.fail('client incorrectly serializes f64 values.')
+
+    def test_get_f64_increment_by_one(self):
+        expected = 43.0
+        rv = self.vapi.get_f64_increment_by_one(f64_value=42.0)
+        self.assertEqual(rv.f64_value, expected, 'Expected %r, received:%r.'
+                         % (expected, rv.f64_value))