| /* |
| * |
| * 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_eq(md, GRPC_MDELEM_GRPC_STATUS_0)) { |
| return GRPC_STATUS_OK; |
| } |
| if (grpc_mdelem_eq(md, GRPC_MDELEM_GRPC_STATUS_1)) { |
| return GRPC_STATUS_CANCELLED; |
| } |
| if (grpc_mdelem_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); |
| } |