blob: 4f29876b1290db0f9e1b3456aab77371db505e11 [file] [log] [blame]
// 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