94 lines
2.2 KiB
C++
94 lines
2.2 KiB
C++
#include "utils.h"
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#include <QJsonDocument>
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#include <QJsonObject>
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#include <QString>
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#include <chrono>
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#include <cstdarg>
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#include <cstdio>
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#include <vector>
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typedef struct {
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std::chrono::time_point<std::chrono::system_clock> start;
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} timer;
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static int _log_level = LOG_INFO;
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static timer *_timer = nullptr;
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static QString formattedMessage(const char *format, va_list args)
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{
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va_list countArgs;
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va_copy(countArgs, args);
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const int length = std::vsnprintf(nullptr, 0, format, countArgs);
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va_end(countArgs);
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if (length < 0) {
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return QString::fromUtf8(format);
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}
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std::vector<char> buffer(static_cast<size_t>(length) + 1);
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std::vsnprintf(buffer.data(), buffer.size(), format, args);
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return QString::fromUtf8(buffer.data(), length);
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}
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extern "C" {
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int logLevel()
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{
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return _log_level;
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}
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void setLogLevel(int l)
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{
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_log_level = l;
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}
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const char *logIndicator(int l)
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{
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switch(l) {
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case LOG_ERROR: return "error";
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case LOG_INFO: return "info";
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case LOG_DEBUG: return "debug";
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case LOG_WARNING: return "warning";
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}
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return "unknown";
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}
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double logElapsedSeconds()
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{
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if (_timer == nullptr) {
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_timer = new timer;
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_timer->start = std::chrono::system_clock::now();
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}
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const auto current = std::chrono::system_clock::now();
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const auto milliseconds
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= std::chrono::duration_cast<std::chrono::milliseconds>(
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current - _timer->start)
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.count();
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return milliseconds / 1000.0;
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}
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void logMessage(int level, const char *format, ...)
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{
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if (logLevel() < level) {
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return;
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}
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va_list args;
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va_start(args, format);
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const QString message = formattedMessage(format, args);
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va_end(args);
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QJsonObject object;
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object.insert(QStringLiteral("topic"), QStringLiteral("webview-backend"));
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object.insert(QStringLiteral("level"), QString::fromLatin1(logIndicator(level)));
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object.insert(QStringLiteral("elapsed"), logElapsedSeconds());
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object.insert(QStringLiteral("message"), message);
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const QByteArray json = QJsonDocument(object).toJson(QJsonDocument::Compact);
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std::fprintf(stderr, "json:%s\n", json.constData());
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std::fflush(stderr);
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}
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}
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