Added HandlerSocket plugin

- Fixed compiler errors
- Modified Makefiles to be part of plugin directory
- Some minor changes in database.cpp to use the new MariaDB handler interface

plugin/handler_socket/libhsclient/string_ref.hpp

@@ -0,0 +1,63 @@
+
+// vim:sw=2:ai
+
+/*
+ * Copyright (C) 2010 DeNA Co.,Ltd.. All rights reserved.
+ * See COPYRIGHT.txt for details.
+ */
+
+#ifndef DENA_STRING_REF_HPP
+#define DENA_STRING_REF_HPP
+
+#include <vector>
+#include <string.h>
+
+namespace dena {
+
+struct string_wref {
+  typedef char value_type;
+  char *begin() const { return start; }
+  char *end() const { return start + length; }
+  size_t size() const { return length; }
+ private:
+  char *start;
+  size_t length;
+ public:
+  string_wref(char *s = 0, size_t len = 0) : start(s), length(len) { }
+};
+
+struct string_ref {
+  typedef const char value_type;
+  const char *begin() const { return start; }
+  const char *end() const { return start + length; }
+  size_t size() const { return length; }
+ private:
+  const char *start;
+  size_t length;
+ public:
+  string_ref(const char *s = 0, size_t len = 0) : start(s), length(len) { }
+  string_ref(const char *s, const char *f) : start(s), length(f - s) { }
+  string_ref(const string_wref& w) : start(w.begin()), length(w.size()) { }
+};
+
+template <size_t N> inline bool
+operator ==(const string_ref& x, const char (& y)[N]) {
+  return (x.size() == N - 1) && (::memcmp(x.begin(), y, N - 1) == 0);
+}
+
+inline bool
+operator ==(const string_ref& x, const string_ref& y) {
+  return (x.size() == y.size()) &&
+    (::memcmp(x.begin(), y.begin(), x.size()) == 0);
+}
+
+inline bool
+operator !=(const string_ref& x, const string_ref& y) {
+  return (x.size() != y.size()) ||
+    (::memcmp(x.begin(), y.begin(), x.size()) != 0);
+}
+
+};
+
+#endif
+