Built motion from commit 6a09e18b.|2.6.11

[motion2.git] / legacy-libs / grpc / deps / grpc / src / core / lib / transport / status_metadata.cc

diff --git a/legacy-libs/grpc/deps/grpc/src/core/lib/transport/status_metadata.cc b/legacy-libs/grpc/deps/grpc/src/core/lib/transport/status_metadata.cc
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+++ b/legacy-libs/grpc/deps/grpc/src/core/lib/transport/status_metadata.cc
@@ -0,0 +1,54 @@
+/*
+ *
+ * Copyright 2017 gRPC authors.
+ *
+ * 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.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#include "src/core/lib/transport/status_metadata.h"
+
+#include "src/core/lib/slice/slice_string_helpers.h"
+#include "src/core/lib/transport/static_metadata.h"
+
+/* we offset status by a small amount when storing it into transport metadata
+   as metadata cannot store a 0 value (which is used as OK for grpc_status_codes
+   */
+#define STATUS_OFFSET 1
+
+static void destroy_status(void* ignored) {}
+
+grpc_status_code grpc_get_status_code_from_metadata(grpc_mdelem md) {
+  if (grpc_mdelem_static_value_eq(md, GRPC_MDELEM_GRPC_STATUS_0)) {
+    return GRPC_STATUS_OK;
+  }
+  if (grpc_mdelem_static_value_eq(md, GRPC_MDELEM_GRPC_STATUS_1)) {
+    return GRPC_STATUS_CANCELLED;
+  }
+  if (grpc_mdelem_static_value_eq(md, GRPC_MDELEM_GRPC_STATUS_2)) {
+    return GRPC_STATUS_UNKNOWN;
+  }
+  void* user_data = grpc_mdelem_get_user_data(md, destroy_status);
+  if (user_data != nullptr) {
+    return static_cast<grpc_status_code>((intptr_t)user_data - STATUS_OFFSET);
+  }
+  uint32_t status;
+  if (!grpc_parse_slice_to_uint32(GRPC_MDVALUE(md), &status)) {
+    status = GRPC_STATUS_UNKNOWN; /* could not parse status code */
+  }
+  grpc_mdelem_set_user_data(
+      md, destroy_status, (void*)static_cast<intptr_t>(status + STATUS_OFFSET));
+  return static_cast<grpc_status_code>(status);
+}