regular expression wrapping

src/OSspecific/Unix/regularExpression.H

+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 1991-2008 OpenCFD Ltd.
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM 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; either version 2 of the License, or (at your
+    option) any later version.
+
+    OpenFOAM 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 OpenFOAM; if not, write to the Free Software Foundation,
+    Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+
+Class
+    Foam::regularExpression
+
+Description
+    Wrapper around regular expressions.
+
+SourceFiles
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef regularExpression_H
+#define regularExpression_H
+
+#include <sys/types.h>
+#include <regex.h>
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+/*---------------------------------------------------------------------------*\
+                           Class regularExpression Declaration
+\*---------------------------------------------------------------------------*/
+
+class regularExpression
+{
+    // Private data
+
+        //- Precompiled regular expression
+        regex_t* preg_;
+
+
+    // Private member functions
+
+        //- Disallow default bitwise copy construct
+        regularExpression(const regularExpression&);
+
+        //- Disallow default bitwise assignment
+        void operator=(const regularExpression&);
+
+public:
+
+
+    // Constructors
+
+        //- Construct from string
+        inline regularExpression(const string& s)
+        {
+            preg_ = new regex_t;
+
+            if (regcomp(preg_, s.c_str(), REG_EXTENDED|REG_NOSUB) != 0)
+            {
+                FatalErrorIn
+                (
+                    "regularExpression::regularExpression(const char*)"
+                )   << "Failed to compile regular expression " << s
+                    << exit(FatalError);
+            }
+        }
+
+
+    // Destructor
+
+        //- Construct from string
+        inline ~regularExpression()
+        {
+            if (preg_)
+            {
+                regfree(preg_);
+                delete preg_;
+            }
+        }
+
+
+    // Member functions
+
+        //- Matches?
+        inline bool matches(const string& s)
+        {
+            size_t nmatch = 0;
+            regmatch_t *pmatch = NULL;
+
+            return regexec(preg_, s.c_str(), nmatch, pmatch, 0) == 0;
+        }
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //