Add RE2 regex module.

.gitignore

@@ -21,6 +21,7 @@
 /src/modules/m_pgsql.cpp
 /src/modules/m_regex_pcre.cpp
 /src/modules/m_regex_posix.cpp
+/src/modules/m_regex_re2.cpp
 /src/modules/m_regex_stdlib.cpp
 /src/modules/m_regex_tre.cpp
 /src/modules/m_sqlite3.cpp

docs/conf/modules.conf.example

@@ -1379,6 +1379,12 @@
 # m_rline.
 #<module name="m_regex_pcre.so">
 
+#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#
+# Regular Expression Provider for RE2 Regular Expressions.
+# You need libre2 installed and in your include/library paths in order
+# to compile and load this module.
+#<module name="m_regex_re2.so">
+
 #-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#
 # Regular Expression Provider for POSIX Regular Expressions.
 # You shouldn't need any additional libraries on a POSIX-compatible

src/modules/extra/m_regex_re2.cpp

@@ -0,0 +1,89 @@
+/*
+ * InspIRCd -- Internet Relay Chat Daemon
+ *
+ *   Copyright (C) 2013 Peter Powell <petpow@saberuk.com>
+ *   Copyright (C) 2012 ChrisTX <chris@rev-crew.info>
+ *
+ * This file is part of InspIRCd.  InspIRCd is free software: you can
+ * redistribute it and/or modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation, version 2.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#if defined __GNUC__
+# pragma GCC diagnostic ignored "-Wshadow"
+#endif
+
+#include "inspircd.h"
+#include "modules/regex.h"
+#include <re2/re2.h>
+
+
+/* $ModDesc: Regex Provider Module for RE2 Regular Expressions */
+/* $CompileFlags: -std=c++11 */
+/* $LinkerFlags: -lre2 */
+/* $ModDep: modules/regex.h */
+
+class RE2Exception : public ModuleException
+{
+ public:
+	 RE2Exception(const std::string& rx, const std::string& error)
+		: ModuleException(std::string("Error in regex ") + rx + ": " + error)
+	{
+	}
+};
+
+class RE2Regex : public Regex
+{
+	RE2 regexcl;
+
+ public:
+	RE2Regex(const std::string& rx) : Regex(rx), regexcl(rx, RE2::Quiet)
+	{
+		if (!regexcl.ok())
+		{
+			throw RE2Exception(rx, regexcl.error());
+		}
+	}
+
+	bool Matches(const std::string& text)
+	{
+		return RE2::FullMatch(text, regexcl);
+	}
+};
+
+class RE2Factory : public RegexFactory
+{
+ public:
+	RE2Factory(Module* m) : RegexFactory(m, "regex/re2") { }
+	Regex* Create(const std::string& expr)
+	{
+		return new RE2Regex(expr);
+	}
+};
+
+class ModuleRegexRE2 : public Module
+{
+	RE2Factory ref;
+
+ public:
+	ModuleRegexRE2() : ref(this)
+	{
+		ServerInstance->Modules->AddService(ref);
+	}
+
+	Version GetVersion() CXX11_OVERRIDE
+	{
+		return Version("Regex Provider Module for RE2", VF_VENDOR);
+	}
+};
+
+MODULE_INIT(ModuleRegexRE2)