Added logging support from aws-crt-ffi (#42)

* Added logging support from aws-crt-ffi

* Updated to aws-crt-ffi v0.2.1

src/AWS/CRT/CRT.php

@@ -113,6 +113,34 @@ final class CRT {
         return self::$impl->aws_crt_error_name((int) $error);
     }
 
+    public static function log_to_stdout() {
+        return self::$impl->aws_crt_log_to_stdout();
+    }
+
+    public static function log_to_stderr() {
+        return self::$impl->aws_crt_log_to_stderr();
+    }
+
+    public static function log_to_file($filename) {
+        return self::$impl->aws_crt_log_to_file($filename);
+    }
+
+    public static function log_to_stream($stream) {
+        return self::$impl->aws_crt_log_to_stream($stream);
+    }
+
+    public static function log_set_level($level) {
+        return self::$impl->aws_crt_log_set_level($level);
+    }
+
+    public static function log_stop() {
+        return self::$impl->aws_crt_log_stop();
+    }
+
+    public static function log_message($level, $message) {
+        return self::$impl->aws_crt_log_message($level, $message);
+    }
+
     /**
      * @return object Pointer to native event_loop_group_options
      */

src/AWS/CRT/Log.php

@@ -0,0 +1,47 @@
+<?php
+/**
+ * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ * SPDX-License-Identifier: Apache-2.0.
+ */
+namespace AWS\CRT;
+use AWS\CRT\CRT;
+
+final class Log {
+    const NONE = 0;
+    const FATAL = 1;
+    const ERROR = 2;
+    const WARN = 3;
+    const INFO = 4;
+    const DEBUG = 5;
+    const TRACE = 6;
+
+    public static function toStdout() {
+        CRT::log_to_stdout();
+    }
+
+    public static function toStderr() {
+        CRT::log_to_stderr();
+    }
+
+    public static function toFile($filename) {
+        CRT::log_to_file($filename);
+    }
+
+    public static function toStream($stream) {
+        assert(get_resource_type($stream) == "stream");
+        CRT::log_to_stream($stream);
+    }
+
+    public static function stop() {
+        CRT::log_stop();
+    }
+
+    public static function setLogLevel($level) {
+        assert($level >= self::NONE && $level <= self::TRACE);
+        CRT::log_set_level($level);
+    }
+
+    public static function log($level, $message) {
+        CRT::log_message($level, $message);
+    }
+}