1 files changed, 83 insertions, 0 deletions
diff --git a/src/openvic/Logger.hpp b/src/openvic/Logger.hpp
new file mode 100644
index 0000000..2c603e2
--- /dev/null
+++ b/src/openvic/Logger.hpp
@@ -0,0 +1,83 @@
+#pragma once
+
+#include <functional>
+#include <sstream>
+#ifdef __cpp_lib_source_location
+#include <source_location>
+#endif
+
+namespace OpenVic {
+
+	#ifndef __cpp_lib_source_location
+	#include <string>
+	//Implementation of std::source_location for compilers that do not support it
+	//Note: uses non-standard extensions that are supported by Clang, GCC, and MSVC
+	//https://clang.llvm.org/docs/LanguageExtensions.html#source-location-builtins
+	//https://stackoverflow.com/a/67970107
+	class source_location {
+		std::string _file;
+		int _line;
+		std::string _function;
+
+		public:
+		source_location(std::string f, int l, std::string n) : _file(f), _line(l),  _function(n) {}
+		static source_location current(std::string f = __builtin_FILE(), int l = __builtin_LINE(), std::string n = __builtin_FUNCTION()) {
+			return source_location(f, l, n);
+		}
+
+		inline char const* file_name() const { return _file.c_str(); }
+		inline int line() const {return _line; }
+		inline char const* function_name() const { return _function.c_str(); }
+	};
+	#endif
+
+	class Logger {
+		using log_func_t = std::function<void(std::string&&)>;
+
+		#ifdef __cpp_lib_source_location
+		using source_location = std::source_location;
+		#else
+		using source_location = OpenVic::source_location;
+		#endif
+
+		static log_func_t info_func, error_func;
+
+		static char const* get_filename(char const* filepath);
+
+		template <typename... Ts>
+		struct log {
+			log(log_func_t log_func, Ts&&... ts, const source_location& location) {
+				if (log_func) {
+					std::stringstream stream;
+					stream << std::endl << get_filename(location.file_name()) << "(" << location.line() << ") `" << location.function_name() << "`: ";
+					((stream << std::forward<Ts>(ts)), ...);
+					stream << std::endl;
+					log_func(stream.str());
+				}
+			}
+		};
+	public:
+		static void set_info_func(log_func_t log_func);
+		static void set_error_func(log_func_t log_func);
+
+		template <typename... Ts>
+		struct info {
+			info(Ts&&... ts, const source_location& location = source_location::current()) {
+				log<Ts...>{ info_func, std::forward<Ts>(ts)..., location };
+			}
+		};
+
+		template <typename... Ts>
+		info(Ts&&...) -> info<Ts...>;
+
+		template <typename... Ts>
+		struct error {
+			error(Ts&&... ts, const source_location& location = source_location::current()) {
+				log<Ts...>{ error_func, std::forward<Ts>(ts)..., location };
+			}
+		};
+
+		template <typename... Ts>
+		error(Ts&&...) -> error<Ts...>;
+	};
+}