core(logger): add log level configuration option

2026-07-30 15:53:03 +04:00 · 2017-12-17 22:28:33 +00:00
parent cac4a7e5b5
commit b450811e4b
3 changed files with 128 additions and 19 deletions
@@ -0,0 +1,85 @@
+// This file is part of OpenCV project.
+// It is subject to the license terms in the LICENSE file found in the top-level directory
+// of this distribution and at http://opencv.org/license.html.
+
+#include <precomp.hpp>
+
+#include <opencv2/core/utils/configuration.private.hpp>
+#include <opencv2/core/utils/logger.hpp>
+
+#include <sstream>
+#include <iostream>
+#include <fstream>
+
+namespace cv {
+namespace utils {
+namespace logging {
+
+static LogLevel parseLogLevelConfiguration()
+{
+    static cv::String param_log_level = utils::getConfigurationParameterString("OPENCV_LOG_LEVEL", "INFO");
+    if (param_log_level == "DISABLED" || param_log_level == "disabled" ||
+        param_log_level == "0" || param_log_level == "OFF" || param_log_level == "off")
+        return LOG_LEVEL_SILENT;
+    if (param_log_level == "FATAL" || param_log_level == "fatal")
+        return LOG_LEVEL_FATAL;
+    if (param_log_level == "ERROR" || param_log_level == "error")
+        return LOG_LEVEL_ERROR;
+    if (param_log_level == "WARNING" || param_log_level == "warning" ||
+        param_log_level == "WARNINGS" || param_log_level == "warnings" ||
+        param_log_level == "WARN" || param_log_level == "warn")
+        return LOG_LEVEL_WARNING;
+    if (param_log_level == "INFO" || param_log_level == "info")
+        return LOG_LEVEL_INFO;
+    if (param_log_level == "DEBUG" || param_log_level == "debug")
+        return LOG_LEVEL_DEBUG;
+    if (param_log_level == "VERBOSE" || param_log_level == "verbose")
+        return LOG_LEVEL_VERBOSE;
+    std::cerr << "ERROR: Unexpected logging level value: " << param_log_level << std::endl;
+    return LOG_LEVEL_INFO;
+}
+
+static LogLevel& getLogLevelVariable()
+{
+    static LogLevel g_logLevel = parseLogLevelConfiguration();
+    return g_logLevel;
+}
+
+LogLevel setLogLevel(LogLevel logLevel)
+{
+    LogLevel old = getLogLevelVariable();
+    getLogLevelVariable() = logLevel;
+    return old;
+}
+
+LogLevel getLogLevel()
+{
+    return getLogLevelVariable();
+}
+
+namespace internal {
+
+void writeLogMessage(LogLevel logLevel, const char* message)
+{
+    const int threadID = cv::utils::getThreadID();
+    std::ostream* out = (logLevel <= LOG_LEVEL_WARNING) ? &std::cerr : &std::cout;
+    std::stringstream ss;
+    switch (logLevel)
+    {
+    case LOG_LEVEL_FATAL:   ss << "[FATAL:" << threadID << "] " << message << std::endl; break;
+    case LOG_LEVEL_ERROR:   ss << "[ERROR:" << threadID << "] " << message << std::endl; break;
+    case LOG_LEVEL_WARNING: ss << "[ WARN:" << threadID << "] " << message << std::endl; break;
+    case LOG_LEVEL_INFO:    ss << "[ INFO:" << threadID << "] " << message << std::endl; break;
+    case LOG_LEVEL_DEBUG:   ss << "[DEBUG:" << threadID << "] " << message << std::endl; break;
+    case LOG_LEVEL_VERBOSE: ss << message << std::endl; break;
+    default:
+        return;
+    }
+    (*out) << ss.str();
+    if (logLevel <= LOG_LEVEL_WARNING)
+        (*out) << std::flush;
+}
+
+} // namespace
+
+}}} // namespace