lite wip

CMakeLists.txt

@@ -54,6 +54,8 @@ option(SPDLOG_BUILD_BENCH "Build benchmarks (Requires https://github.com/google/
 option(SPDLOG_BUILD_TESTS "Build tests" ${SPDLOG_MASTER_PROJECT})
 option(SPDLOG_FMT_EXTERNAL "Use external fmt library instead of bundled" OFF)
 option(SPDLOG_INSTALL "Generate the install target." ${SPDLOG_MASTER_PROJECT})
+option(SPDLOG_BUILD_LITE "Build spdlog lite" ${SPDLOG_MASTER_PROJECT})
+
 
 if(SPDLOG_FMT_EXTERNAL AND NOT TARGET fmt::fmt)
     find_package(fmt REQUIRED CONFIG)
@@ -86,6 +88,11 @@ if(SPDLOG_BUILD_BENCH)
     add_subdirectory(bench)
 endif()
 
+if(SPDLOG_BUILD_LITE)
+    add_subdirectory(lite)
+    add_subdirectory(lite-example)
+endif()
+
 #---------------------------------------------------------------------------------------
 # Install/export targets and files
 #---------------------------------------------------------------------------------------

lite-example/CMakeLists.txt

+project(spdlog-lite-example CXX)
+
+find_package(Threads REQUIRED)
+
+set(LITE_SOURCES example.cpp create_lite.cpp)
+
+add_executable(${PROJECT_NAME} ${LITE_SOURCES})
+
+include_directories(../lite)
+target_link_libraries(${PROJECT_NAME} PRIVATE Threads::Threads)
+target_link_libraries(${PROJECT_NAME} PRIVATE spdlog_lite)
+
+

lite-example/create_lite.cpp

+#include "logger.h"
+#include "spdlog/spdlog.h"
+
+
+spdlog::lite::logger spdlog::create_lite(void* ctx)
+{
+    if(ctx) {
+        //..
+    }
+    auto logger_impl = spdlog::default_logger();
+    logger_impl->set_level(spdlog::level::trace);
+    return spdlog::lite::logger(logger_impl);
+}
+
+

lite-example/example.cpp

+#include "logger.h"
+
+int main()
+{
+    auto l = spdlog::create_lite();
+    l.trace("HELLO {}!!!", "lite");
+}
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lite/CMakeLists.txt

+cmake_minimum_required(VERSION 3.1)
+project(spdlog_lite)
+
+add_library(spdlog_lite logger.cpp)
+
+target_link_libraries(spdlog_lite spdlog::spdlog)

lite/logger.cpp

+#include "logger.h"
+#include "spdlog/spdlog.h"
+#include "spdlog/logger.h"
+
+spdlog::lite::logger::logger(std::shared_ptr<spdlog::logger> impl)
+{
+    impl_ = std::move(impl);
+}
+
+
+bool spdlog::lite::logger::should_log(spdlog::lite::level lvl) const SPDLOG_NOEXCEPT
+{
+    auto spd_level = static_cast<spdlog::level::level_enum >(lvl);
+    return impl_->should_log(spd_level);//TODO level
+}
+
+void spdlog::lite::logger::log_formatted_(spdlog::lite::level lvl, const fmt::memory_buffer &formatted)
+{
+    auto spd_level = static_cast<spdlog::level::level_enum >(lvl);
+    impl_->log(spd_level, spdlog::details::fmt_helper::to_string_view(formatted)); //TODO and source_loc
+}
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lite/logger.h

+//
+// Created by gabi on 3/16/19.
+//
+
+#ifndef SPDLOG_LIB_LOGGER_H
+#define SPDLOG_LIB_LOGGER_H
+
+#include <memory>
+#include "spd_types.h"
+#include "spdlog/fmt/fmt.h"
+
+
+namespace spdlog {
+    class logger;
+
+    namespace lite {
+        class logger {
+        public:
+            logger() = default;
+
+            logger(std::shared_ptr<spdlog::logger> impl);
+            logger(const logger&) = default;
+            logger(logger&&) = default;
+            logger& operator=(const logger&) = default;
+
+            ~logger() = default;
+
+            bool should_log(spdlog::lite::level lvl) const noexcept;
+
+            template<typename... Args>
+            void log(spdlog::lite::level lvl, const char *fmt, const Args &... args) {
+                if (!should_log(lvl)) {
+                    return;
+                }
+                fmt::memory_buffer formatted_buf;
+                fmt::format_to(formatted_buf, fmt, args...);
+                log_formatted_(lvl, formatted_buf);
+            }
+
+//        template<typename... Args>
+//        void log(spdlog::lite::level lvl, const char *fmt, const Args &... args)
+//        {
+//            log(lvl, fmt, args...);
+//        }
+
+            template<typename... Args>
+            void trace(const char *fmt, const Args &... args) {
+                log(spdlog::lite::level::trace, fmt, args...);
+            }
+
+        protected:
+            std::shared_ptr<spdlog::logger> impl_;
+
+            void log_formatted_(spdlog::lite::level lvl, const fmt::memory_buffer &formatted);
+
+        };
+
+    } // namespace lite
+
+    // factory to create lite logger
+    // implement it in a dedicated compilation unit for fast compiles
+    spdlog::lite::logger create_lite(void* ctx = nullptr);
+} // namespace spdlog
+#endif //SPDLOG_LIB_LOGGER_H

lite/spd_types.h

+//
+// Copyright(c) 2019 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+// core types, forward declarations and defines used by spdlog
+
+#pragma once
+
+namespace spdlog
+{
+namespace lite
+{
+    enum class level{
+        trace,
+        debug,
+        info,
+        warning,
+        error,
+        critical,
+        off
+
+    };
+}}
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