small wildcard/regexp wrapper

src/utils/strmatcher.cpp

@@ -0,0 +1,90 @@
+/* Copyright (C) 2012 J.F.Dockes
+ *   This program 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.
+ *
+ *   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, write to the
+ *   Free Software Foundation, Inc.,
+ *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+
+#include "autoconfig.h"
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <regex.h>
+#include <fnmatch.h>
+
+#include <string>
+using std::string;
+
+#include "cstr.h"
+
+#include "strmatcher.h"
+
+bool StrWildMatcher::match(const string& val) const
+{
+    return fnmatch(m_sexp.c_str(), val.c_str(), 0) != FNM_NOMATCH;
+}
+
+string::size_type StrWildMatcher::baseprefixlen() const
+{
+    return m_sexp.find_first_of(cstr_wildSpecStChars);
+}
+
+StrRegexpMatcher::StrRegexpMatcher(const string& exp)
+    : StrMatcher(exp), m_compiled(0), m_errcode(0) 
+{
+    setExp(exp);
+}
+
+bool StrRegexpMatcher::setExp(const string& exp)
+{
+    if (m_compiled) {
+	regfree((regex_t*)m_compiled);
+	delete (regex_t*)m_compiled;
+    }
+    m_compiled = new regex_t;
+    if ((m_errcode = 
+	 regcomp((regex_t*)m_compiled, exp.c_str(), REG_EXTENDED|REG_NOSUB))) {
+	char errbuf[200];
+	regerror(m_errcode, (regex_t*)m_compiled, errbuf, 199);
+	m_reason = string("StrRegexpMatcher:regcomp failed for ")
+	    + exp + string(errbuf);
+	return false;
+    }
+    m_sexp = exp;
+    return true;
+}
+
+StrRegexpMatcher::~StrRegexpMatcher()
+{
+    if (m_compiled) {
+	regfree((regex_t*)m_compiled);
+	delete (regex_t*)m_compiled;
+    }
+}
+
+bool StrRegexpMatcher::match(const string& val) const
+{
+    if (m_errcode) 
+	return false;
+    return regexec((regex_t*)m_compiled, val.c_str(), 0, 0, 0) != REG_NOMATCH;
+}
+
+string::size_type StrRegexpMatcher::baseprefixlen() const
+{
+    return m_sexp.find_first_of(cstr_regSpecStChars);
+}
+
+bool StrRegexpMatcher::ok() const
+{
+    return !m_errcode;
+}

src/utils/strmatcher.h

@@ -0,0 +1,95 @@
+/* Copyright (C) 2012 J.F.Dockes
+ *   This program 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.
+ *
+ *   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, write to the
+ *   Free Software Foundation, Inc.,
+ *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+#ifndef _STRMATCHER_H_INCLUDED_
+#define _STRMATCHER_H_INCLUDED_
+
+#include <string>
+
+// Encapsulating simple wildcard/regexp string matching.
+
+// Matcher class. Interface to either wildcard or regexp yes/no matcher
+class StrMatcher {
+public:
+    StrMatcher(const std::string& exp) 
+    : m_sexp(exp)
+    {
+    }
+    virtual ~StrMatcher() {};
+    virtual bool match(const std::string &val) const = 0;
+    virtual std::string::size_type baseprefixlen() const = 0;
+    virtual bool setExp(const std::string& newexp) 
+    {
+	m_sexp = newexp;
+	return true;
+    }
+    virtual bool ok() const
+    {
+	return true;
+    }
+    virtual const std::string& exp()
+    {
+	return m_sexp;
+    }
+    virtual StrMatcher *clone() = 0;
+    const string& getreason() 
+    {
+	return m_reason;
+    }
+protected:
+    std::string m_sexp;
+    std::string m_reason;
+};
+
+class StrWildMatcher : public StrMatcher {
+public:
+    StrWildMatcher(const std::string& exp)
+    : StrMatcher(exp)
+    {
+    }
+    virtual ~StrWildMatcher()
+    {
+    }
+    virtual bool match(const std::string& val) const;
+    virtual std::string::size_type baseprefixlen() const;
+    virtual StrWildMatcher *clone()
+    {
+	return new StrWildMatcher(m_sexp);
+    }
+};
+
+class StrRegexpMatcher : public StrMatcher {
+public:
+    StrRegexpMatcher(const std::string& exp);
+    virtual bool setExp(const std::string& newexp);
+    virtual ~StrRegexpMatcher();
+    virtual bool match(const std::string& val) const;
+    virtual std::string::size_type baseprefixlen() const;
+    virtual bool ok() const;
+    virtual StrRegexpMatcher *clone()
+    {
+	return new StrRegexpMatcher(m_sexp);
+    }
+    const string& getreason() 
+    {
+	return m_reason;
+    }
+private:
+    void *m_compiled;
+    bool m_errcode;
+};
+
+#endif /* _STRMATCHER_H_INCLUDED_ */