Squashed 'third_party/seasocks/' content from commit 016dc60

Change-Id: I195fa5bfd0c0e3cc66fbbefcc7b5170bafcf7a36
git-subtree-dir: third_party/seasocks
git-subtree-split: 016dc60b247e0d1d563aea6d22a9075e6884ab9f
diff --git a/src/main/c/seasocks/Logger.h b/src/main/c/seasocks/Logger.h
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+// Copyright (c) 2013, Matt Godbolt
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without 
+// modification, are permitted provided that the following conditions are met:
+// 
+// Redistributions of source code must retain the above copyright notice, this 
+// list of conditions and the following disclaimer.
+// 
+// Redistributions in binary form must reproduce the above copyright notice, 
+// this list of conditions and the following disclaimer in the documentation 
+// and/or other materials provided with the distribution.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
+// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
+// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 
+// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
+// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
+// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
+// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
+// POSSIBILITY OF SUCH DAMAGE.
+
+#pragma once
+
+namespace seasocks {
+
+/**
+ * Class to send debug logging information to.
+ */
+class Logger {
+public:
+    virtual ~Logger() {}
+
+    enum Level {
+        DEBUG,  // NB DEBUG is usually opted-out of at compile-time.
+        ACCESS, // Used to log page requests etc
+        INFO,
+        WARNING,
+        ERROR,
+        SEVERE,
+    };
+
+    virtual void log(Level level, const char* message) = 0;
+
+    void debug(const char* message, ...);
+    void access(const char* message, ...);
+    void info(const char* message, ...);
+    void warning(const char* message, ...);
+    void error(const char* message, ...);
+    void severe(const char* message, ...);
+
+    static const char* levelToString(Level level) {
+        switch (level) {
+        case DEBUG: return "debug";
+        case ACCESS: return "access";
+        case INFO: return "info";
+        case WARNING: return "warning";
+        case ERROR: return "ERROR";
+        case SEVERE: return "SEVERE";
+        default: return "???";
+        }
+    }
+};
+
+}  // namespace seasocks