From b4a229e26f195ad4f31a6b2096f88c9523c008de Mon Sep 17 00:00:00 2001
From: Michael Fabian 'Xaymar' Dirks <info@xaymar.com>
Date: Sun, 8 Nov 2020 06:47:47 +0100
Subject: [PATCH] util/logging: Add logging utility

Also contains the function signature and name macros.
---
 CMakeLists.txt               |  2 ++
 source/util/util-logging.cpp | 44 +++++++++++++++++++++++++++
 source/util/util-logging.hpp | 58 ++++++++++++++++++++++++++++++++++++
 3 files changed, 104 insertions(+)
 create mode 100644 source/util/util-logging.cpp
 create mode 100644 source/util/util-logging.hpp

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 08ba167c..9eef7903 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -987,6 +987,8 @@ list(APPEND PROJECT_PRIVATE_SOURCE
 	"source/util/util-event.hpp"
 	"source/util/util-library.cpp"
 	"source/util/util-library.hpp"
+	"source/util/util-logging.cpp"
+	"source/util/util-logging.hpp"
 	"source/util/util-threadpool.cpp"
 	"source/util/util-threadpool.hpp"
 	"source/gfx/gfx-source-texture.hpp"
diff --git a/source/util/util-logging.cpp b/source/util/util-logging.cpp
new file mode 100644
index 00000000..3a1b0942
--- /dev/null
+++ b/source/util/util-logging.cpp
@@ -0,0 +1,44 @@
+/*
+ * Modern effects for a modern Streamer
+ * Copyright (C) 2020 Michael Fabian Dirks
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+*/
+
+#include "util-logging.hpp"
+#include "common.hpp"
+#include <stdarg.h>
+
+void util::logging::log(level lvl, const char* format, ...)
+{
+	const static std::map<level, int32_t> level_map = {
+		{level::LEVEL_DEBUG, LOG_DEBUG},
+		{level::LEVEL_INFO, LOG_INFO},
+		{level::LEVEL_WARN, LOG_WARNING},
+		{level::LEVEL_ERROR, LOG_ERROR},
+	};
+	thread_local static std::vector<char> buffer;
+
+	va_list vargs;
+	va_start(vargs, format);
+
+	int32_t ret = vsnprintf(buffer.data(), buffer.size(), format, vargs);
+	buffer.resize(ret + 1);
+	ret = vsnprintf(buffer.data(), buffer.size(), format, vargs);
+
+	va_end(vargs);
+
+	blog(level_map.at(lvl), "[StreamFX] %s", buffer.data());
+}
diff --git a/source/util/util-logging.hpp b/source/util/util-logging.hpp
new file mode 100644
index 00000000..be1c20dd
--- /dev/null
+++ b/source/util/util-logging.hpp
@@ -0,0 +1,58 @@
+/*
+ * Modern effects for a modern Streamer
+ * Copyright (C) 2020 Michael Fabian Dirks
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+#pragma once
+#include <cinttypes>
+#include <cstdint>
+
+#define P_LOG(...) util::logging::log(__VA_ARGS__);
+#define P_LOG_ERROR(...) P_LOG(util::logging::level::LEVEL_ERROR, __VA_ARGS__)
+#define P_LOG_WARN(...) P_LOG(util::logging::level::LEVEL_WARN, __VA_ARGS__)
+#define P_LOG_INFO(...) P_LOG(util::logging::level::LEVEL_INFO, __VA_ARGS__)
+#ifdef _DEBUG
+#define P_LOG_DEBUG(...) P_LOG(util::logging::level::LEVEL_DEBUG, __VA_ARGS__)
+#else
+#define P_LOG_DEBUG(...)
+#endif
+
+// Function/Class/Struct Name
+#ifdef _MSC_VER
+// Microsoft Visual Studio
+#define __FUNCTION_SIG__ __FUNCSIG__
+#define __FUNCTION_NAME__ __func__
+#elif defined(__GNUC__) || defined(__MINGW32__)
+// GCC and MinGW
+#define __FUNCTION_SIG__ __PRETTY_FUNCTION__
+#define __FUNCTION_NAME__ __func__
+#else
+// Any other compiler
+#define __FUNCTION_SIG__ __func__
+#define __FUNCTION_NAME__ __func__
+#endif
+
+namespace util::logging {
+	enum class level {
+		LEVEL_DEBUG, // Debug information, which is not necessary to know at runtime.
+		LEVEL_INFO,  // Runtime information, which may or may not be needed for support.
+		LEVEL_WARN,  // Warnings, which should be respected and fixed.
+		LEVEL_ERROR, // Errors that must be fixed.
+	};
+
+	void log(level lvl, const char* format, ...);
+} // namespace util::logging