| // |
| // |
| // Copyright 2020 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/json/json_util.h" |
| |
| #include <grpc/support/string_util.h> |
| |
| #include "src/core/lib/gpr/string.h" |
| |
| namespace grpc_core { |
| |
| bool ParseDurationFromJson(const Json& field, grpc_millis* duration) { |
| if (field.type() != Json::Type::STRING) return false; |
| size_t len = field.string_value().size(); |
| if (field.string_value()[len - 1] != 's') return false; |
| grpc_core::UniquePtr<char> buf(gpr_strdup(field.string_value().c_str())); |
| *(buf.get() + len - 1) = '\0'; // Remove trailing 's'. |
| char* decimal_point = strchr(buf.get(), '.'); |
| int nanos = 0; |
| if (decimal_point != nullptr) { |
| *decimal_point = '\0'; |
| nanos = gpr_parse_nonnegative_int(decimal_point + 1); |
| if (nanos == -1) { |
| return false; |
| } |
| int num_digits = static_cast<int>(strlen(decimal_point + 1)); |
| if (num_digits > 9) { // We don't accept greater precision than nanos. |
| return false; |
| } |
| for (int i = 0; i < (9 - num_digits); ++i) { |
| nanos *= 10; |
| } |
| } |
| int seconds = |
| decimal_point == buf.get() ? 0 : gpr_parse_nonnegative_int(buf.get()); |
| if (seconds == -1) return false; |
| *duration = seconds * GPR_MS_PER_SEC + nanos / GPR_NS_PER_MS; |
| return true; |
| } |
| |
| } // namespace grpc_core |