| // Copyright 2020 The Pigweed 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 |
| // |
| // https://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. |
| |
| // This file defines the functions that encode tokenized logs at runtime. These |
| // are the only pw_tokenizer functions present in a binary that tokenizes |
| // strings. All other tokenizing code is resolved at compile time. |
| |
| #include "pw_tokenizer/tokenize.h" |
| |
| #include <cstring> |
| |
| #include "pw_polyfill/language_features.h" // static_assert |
| #include "pw_tokenizer_private/encode_args.h" |
| |
| namespace pw { |
| namespace tokenizer { |
| |
| extern "C" void _pw_TokenizeToBuffer(void* buffer, |
| size_t* buffer_size_bytes, |
| pw_TokenizerStringToken token, |
| pw_TokenizerArgTypes types, |
| ...) { |
| if (*buffer_size_bytes < sizeof(token)) { |
| *buffer_size_bytes = 0; |
| return; |
| } |
| |
| std::memcpy(buffer, &token, sizeof(token)); |
| |
| va_list args; |
| va_start(args, types); |
| const size_t encoded_bytes = |
| EncodeArgs(types, |
| args, |
| span<uint8_t>(static_cast<uint8_t*>(buffer) + sizeof(token), |
| *buffer_size_bytes - sizeof(token))); |
| va_end(args); |
| |
| *buffer_size_bytes = sizeof(token) + encoded_bytes; |
| } |
| |
| extern "C" void _pw_TokenizeToCallback( |
| void (*callback)(const uint8_t* encoded_message, size_t size_bytes), |
| pw_TokenizerStringToken token, |
| pw_TokenizerArgTypes types, |
| ...) { |
| EncodedMessage encoded; |
| encoded.token = token; |
| |
| va_list args; |
| va_start(args, types); |
| const size_t encoded_bytes = EncodeArgs(types, args, encoded.args); |
| va_end(args); |
| |
| callback(reinterpret_cast<const uint8_t*>(&encoded), |
| sizeof(encoded.token) + encoded_bytes); |
| } |
| |
| } // namespace tokenizer |
| } // namespace pw |