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authorEric Dao <eric@erickhangdao.com>2025-03-10 17:54:31 -0400
committerEric Dao <eric@erickhangdao.com>2025-03-10 17:54:31 -0400
commitab224e2e6ba65f5a369ec392f99cd8845ad06c98 (patch)
treea1e757e9341863ed52b8ad4c5a1c45933aab9da4 /python/openvino/runtime/common/utils/include/samples/slog.hpp
parent40da1752f2c8639186b72f6838aa415e854d0b1d (diff)
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+// Copyright (C) 2018-2022 Intel Corporation
+// SPDX-License-Identifier: Apache-2.0
+//
+
+/**
+ * @brief a header file with logging facility for common samples
+ * @file log.hpp
+ */
+
+#pragma once
+
+#include <ostream>
+#include <string>
+#include <vector>
+
+namespace slog {
+/**
+ * @class LogStreamEndLine
+ * @brief The LogStreamEndLine class implements an end line marker for a log stream
+ */
+class LogStreamEndLine {};
+
+static constexpr LogStreamEndLine endl;
+
+/**
+ * @class LogStreamBoolAlpha
+ * @brief The LogStreamBoolAlpha class implements bool printing for a log stream
+ */
+class LogStreamBoolAlpha {};
+
+static constexpr LogStreamBoolAlpha boolalpha;
+
+/**
+ * @class LogStreamFlush
+ * @brief The LogStreamFlush class implements flushing for a log stream
+ */
+class LogStreamFlush {};
+
+static constexpr LogStreamFlush flush;
+
+/**
+ * @class LogStream
+ * @brief The LogStream class implements a stream for sample logging
+ */
+class LogStream {
+ std::string _prefix;
+ std::ostream* _log_stream;
+ bool _new_line;
+
+public:
+ /**
+ * @brief A constructor. Creates an LogStream object
+ * @param prefix The prefix to print
+ */
+ LogStream(const std::string& prefix, std::ostream& log_stream);
+
+ /**
+ * @brief A stream output operator to be used within the logger
+ * @param arg Object for serialization in the logger message
+ */
+ template <class T>
+ LogStream& operator<<(const T& arg) {
+ if (_new_line) {
+ (*_log_stream) << "[ " << _prefix << " ] ";
+ _new_line = false;
+ }
+
+ (*_log_stream) << arg;
+ return *this;
+ }
+
+ /**
+ * @brief Overload output stream operator to print vectors in pretty form
+ * [value1, value2, ...]
+ */
+ template <typename T>
+ LogStream& operator<<(const std::vector<T>& v) {
+ (*_log_stream) << "[ ";
+
+ for (auto&& value : v)
+ (*_log_stream) << value << " ";
+
+ (*_log_stream) << "]";
+
+ return *this;
+ }
+
+ // Specializing for LogStreamEndLine to support slog::endl
+ LogStream& operator<<(const LogStreamEndLine&);
+
+ // Specializing for LogStreamBoolAlpha to support slog::boolalpha
+ LogStream& operator<<(const LogStreamBoolAlpha&);
+
+ // Specializing for LogStreamFlush to support slog::flush
+ LogStream& operator<<(const LogStreamFlush&);
+};
+
+extern LogStream info;
+extern LogStream warn;
+extern LogStream err;
+
+} // namespace slog