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-rw-r--r--src/openvic/Logger.hpp83
1 files changed, 83 insertions, 0 deletions
diff --git a/src/openvic/Logger.hpp b/src/openvic/Logger.hpp
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+++ b/src/openvic/Logger.hpp
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+#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...>;
+ };
+}