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MessageFormatter.cpp
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MessageFormatter.cpp
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/*
* Copyright (C) 2019-2024 HERE Europe B.V.
*
* 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: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.
*
* SPDX-License-Identifier: Apache-2.0
* License-Filename: LICENSE
*/
#include <olp/core/logging/Format.h>
#include <olp/core/logging/LogContext.h>
#include <olp/core/logging/MessageFormatter.h>
#include <algorithm>
#include <cassert>
#include <cstring>
#include <string>
namespace olp {
namespace logging {
static const char* limitString(std::string& tempStr, const char* str,
int limit) {
if (limit < 0) {
int length = static_cast<int>(std::strlen(str));
int start = std::max(length + limit, 0);
if (start == 0) {
return str;
}
if (length - start > 3) {
tempStr = "...";
start += 3;
} else {
tempStr.clear();
}
tempStr.append(str, start, length - start);
return tempStr.c_str();
} else if (limit > 0) {
std::size_t strLen = std::strlen(str);
std::size_t finalLength = std::min(strLen, static_cast<std::size_t>(limit));
if (finalLength == strLen) {
return str;
}
bool addElipses = false;
if (finalLength > 3) {
finalLength -= 3;
addElipses = true;
}
tempStr.assign(str, finalLength);
if (addElipses) {
tempStr += "...";
}
return tempStr.c_str();
} else {
return str;
}
}
MessageFormatter::Element::Element(ElementType type_) : type(type_), limit(0) {
switch (type) {
case ElementType::Level:
case ElementType::Tag:
case ElementType::Message:
case ElementType::File:
case ElementType::Function:
case ElementType::FullFunction:
format = "%s";
break;
case ElementType::Line:
format = "%u";
break;
case ElementType::Time:
format = "%Y-%m-%d %H:%M:%S";
break;
case ElementType::TimeMs:
format = "%u";
break;
case ElementType::ThreadId:
format = "%lu";
break;
default:
break;
}
}
const MessageFormatter::LevelNameMap& MessageFormatter::defaultLevelNameMap() {
static MessageFormatter::LevelNameMap defaultLevelNameMap = {
{"[TRACE]", "[DEBUG]", "[INFO]", "[WARN]", "[ERROR]", "[FATAL]"}};
return defaultLevelNameMap;
}
MessageFormatter MessageFormatter::createDefault() {
return MessageFormatter(
{Element(ElementType::Time, "%T"), Element(ElementType::TimeMs, ".%.3u "),
Element(ElementType::Level, "%s "), Element(ElementType::Tag, "%s - "),
Element(ElementType::Message)});
}
std::string MessageFormatter::format(const LogMessage& message) const {
std::string formattedMessage;
std::string tempStr;
FormatBuffer curElementBuffer;
for (const Element& element : m_elements) {
const char* curElement;
switch (element.type) {
case ElementType::String:
curElement = element.format.c_str();
break;
case ElementType::Level:
assert(static_cast<std::size_t>(message.level) < m_levelNameMap.size());
curElement = curElementBuffer.format(
element.format.c_str(),
m_levelNameMap[static_cast<std::size_t>(message.level)].c_str());
break;
case ElementType::Tag:
if (!message.tag || !*message.tag) {
continue;
}
curElement = curElementBuffer.format(
element.format.c_str(),
limitString(tempStr, message.tag, element.limit));
break;
case ElementType::Message:
curElement = curElementBuffer.format(
element.format.c_str(),
limitString(tempStr, message.message, element.limit));
break;
case ElementType::File:
curElement = curElementBuffer.format(
element.format.c_str(),
limitString(tempStr, message.file, element.limit));
break;
case ElementType::Line:
curElement =
curElementBuffer.format(element.format.c_str(), message.line);
break;
case ElementType::Function:
curElement = curElementBuffer.format(
element.format.c_str(),
limitString(tempStr, message.function, element.limit));
break;
case ElementType::FullFunction:
curElement = curElementBuffer.format(
element.format.c_str(),
limitString(tempStr, message.fullFunction, element.limit));
break;
case ElementType::Time:
if (m_timezone == Timezone::Local) {
curElement = curElementBuffer.formatLocalTime(message.time,
element.format.c_str());
} else {
curElement = curElementBuffer.formatUtcTime(message.time,
element.format.c_str());
}
break;
case ElementType::TimeMs: {
auto totalMs = std::chrono::duration_cast<std::chrono::milliseconds>(
message.time.time_since_epoch());
unsigned int msOffset =
static_cast<unsigned int>(totalMs.count() % 1000);
curElement = curElementBuffer.format(element.format.c_str(), msOffset);
break;
}
case ElementType::ThreadId:
curElement =
curElementBuffer.format(element.format.c_str(), message.threadId);
break;
case ElementType::ContextValue:
// 'format' is key to lookup
curElement = curElementBuffer.format(
"%s", GetContextValue(element.format).c_str());
break;
default:
continue;
}
formattedMessage += curElement;
}
return formattedMessage;
}
} // namespace logging
} // namespace olp