Merge pull request #188 from PedroRod/master

Added SQLite3 sink to the solution

include/spdlog/sinks/sqlite_sink.h

+#pragma once
+#include "spdlog\sinks\sink.h"
+#include "spdlog/details/log_msg.h"
+#include "spdlog/common.h"
+#include <sqlite3.h>
+
+namespace spdlog
+{
+	namespace sinks
+	{
+		class sqlite_sink :
+			public sink
+		{
+		public:
+
+			explicit sqlite_sink(const std::string& databaseName)
+			{
+				if (sqlite3_open(databaseName.c_str(), &_database))
+					throw spdlog_ex("Error opening database");
+
+				if (sqlite3_prepare_v2(_database, "INSERT INTO Logs (TimeStamp,Level,Message,LoggerName,ThreadId) VALUES (?,?,?,?,?)", -1, &_query_stmt, nullptr) != SQLITE_OK)
+					throw spdlog_ex(sqlite3_errmsg(_database));
+			}
+
+			~sqlite_sink()
+			{
+				sqlite_sink::flush();
+			}
+
+			void flush() override
+			{
+				sqlite3_close(_database);
+
+				sqlite3_finalize(_query_stmt);
+
+				_database = nullptr;
+				_query_stmt = nullptr;
+			}
+
+			void bind_to_statement(const details::log_msg& msg) const
+			{
+				auto time = std::chrono::system_clock::to_time_t(msg.time);
+
+				char time_str[26];
+
+				ctime_s(time_str, sizeof(time_str), &time);
+
+				if (sqlite3_bind_text(_query_stmt, 1, time_str, -1, SQLITE_STATIC) != SQLITE_OK ||
+					sqlite3_bind_text(_query_stmt, 2, to_str(msg.level), -1, SQLITE_STATIC) != SQLITE_OK ||
+					sqlite3_bind_text(_query_stmt, 3, msg.raw.c_str(), -1, SQLITE_STATIC) != SQLITE_OK ||
+					sqlite3_bind_text(_query_stmt, 4, msg.logger_name.c_str(), -1, SQLITE_STATIC) != SQLITE_OK ||
+					sqlite3_bind_int(_query_stmt, 5, msg.thread_id) != SQLITE_OK)
+					throw spdlog_ex(sqlite3_errmsg(_database));
+			}
+
+			void log(const details::log_msg& msg) override
+			{
+				bind_to_statement(msg);
+
+				if (sqlite3_step(_query_stmt) != SQLITE_DONE)
+				{
+					throw spdlog_ex(sqlite3_errmsg(_database));
+				}
+
+				sqlite3_reset(_query_stmt);
+				sqlite3_clear_bindings(_query_stmt);
+			}
+
+		private:
+			sqlite3 *_database;
+
+			sqlite3_stmt * _query_stmt;
+		};
+	}
+}