POSIX regular expression provider (basic/extended controlled by <posix extended=...

git-svn-id: http://svn.inspircd.org/repository/trunk/inspircd@10398 e03df62e-2008-0410-955e-edbf42e46eb7

diff --git a/src/modules/extra/m_regex.h b/src/modules/extra/m_regex.h
index 441d1c0dfbdce1a78ca59a299c2ba220c655f150..7670582c3390a02a7db227ba8e471037b68037c2 100644 (file)
--- a/src/modules/extra/m_regex.h
+++ b/src/modules/extra/m_regex.h
@@ -11,8 +11,8 @@
  * ---------------------------------------------------
  */
 
-#ifndef _REGEX_H
-#define _REGEX_H
+#ifndef _M_REGEX_H
+#define _M_REGEX_H
 
 #include "inspircd.h"
 

diff --git a/src/modules/extra/m_regex_posix.cpp b/src/modules/extra/m_regex_posix.cpp
new file mode 100644 (file)
index 0000000..1a1d8e3
--- /dev/null
+++ b/src/modules/extra/m_regex_posix.cpp
@@ -0,0 +1,113 @@
+/*       +------------------------------------+
+ *       | Inspire Internet Relay Chat Daemon |
+ *       +------------------------------------+
+ *
+ *  InspIRCd: (C) 2002-2008 InspIRCd Development Team
+ * See: http://www.inspircd.org/wiki/index.php/Credits
+ *
+ * This program is free but copyrighted software; see
+ *            the file COPYING for details.
+ *
+ * ---------------------------------------------------
+ */
+
+#include "inspircd.h"
+#include "m_regex.h"
+#include <sys/types.h>
+#include <regex.h>
+
+/* $ModDesc: Regex Provider Module for POSIX Regular Expressions */
+/* $ModDep: m_regex.h */
+
+class POSIXRegexException : public ModuleException
+{
+public:
+       POSIXRegexException(const std::string& rx, const std::string& error)
+               : ModuleException(std::string("Error in regex ") + rx + ": " + error)
+       {
+       }
+};
+
+class POSIXRegex : public Regex
+{
+private:
+       regex_t regbuf;
+
+public:
+       POSIXRegex(const std::string& rx, InspIRCd* Me, bool extended) : Regex(rx, Me)
+       {
+               int flags = (extended ? REG_EXTENDED : 0) | REG_NOSUB;
+               int errcode;
+               errcode = regcomp(&regbuf, rx.c_str(), flags);
+               if (errcode)
+               {
+                       // Get the error string into a std::string. YUCK this involves at least 2 string copies.
+                       std::string error;
+                       char* errbuf;
+                       size_t sz = regerror(errcode, &regbuf, NULL, 0);
+                       errbuf = new char[sz + 1];
+                       memset(errbuf, 0, sz + 1);
+                       regerror(errcode, &regbuf, errbuf, sz + 1);
+                       error = errbuf;
+                       delete[] errbuf;
+                       regfree(&regbuf);
+                       throw POSIXRegexException(rx, error);
+               }
+       }
+
+       virtual ~POSIXRegex()
+       {
+               regfree(&regbuf);
+       }
+
+       virtual bool Matches(const std::string& text)
+       {
+               if (regexec(&regbuf, text.c_str(), 0, NULL, 0) == 0)
+               {
+                       // Bang. :D
+                       return true;
+               }
+               return false;
+       }
+};
+
+class ModuleRegexPOSIX : public Module
+{
+private:
+       bool extended;
+public:
+       ModuleRegexPOSIX(InspIRCd* Me) : Module(Me)
+       {
+               Me->Modules->PublishInterface("RegularExpression", this);
+               Implementation eventlist[] = { I_OnRequest, I_OnRehash };
+               Me->Modules->Attach(eventlist, this, 1);
+               OnRehash(NULL, "");
+       }
+
+       virtual ~ModuleRegexPOSIX()
+       {
+               ServerInstance->Modules->UnpublishInterface("RegularExpression", this);
+       }
+
+       virtual void OnRehash(User* u, const std::string& parameter)
+       {
+               ConfigReader Conf(ServerInstance);
+               extended = Conf.ReadFlag("posix", "extended", 0);
+       }
+
+       virtual const char* OnRequest(Request* request)
+       {
+               if (strcmp("REGEX-NAME", request->GetId()) == 0)
+               {
+                       return "posix";
+               }
+               else if (strcmp("REGEX", request->GetId()) == 0)
+               {
+                       RegexFactoryRequest* rfr = (RegexFactoryRequest*)request;
+                       std::string rx = rfr->GetRegex();
+                       rfr->result = new POSIXRegex(rx, ServerInstance, extended);
+                       return "OK";
+               }
+               return NULL;
+       }
+};