Regex.h

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#ifndef ZYPP_BASE_REGEX_H
#define ZYPP_BASE_REGEX_H

#include <iosfwd>
#include <string>
#include <regex.h>

#include "zypp/base/Exception.h"

namespace zypp
{
  namespace str
  {

    typedef Exception regex_error;

    class smatch;
    class regex;

    bool regex_match( const char * s, smatch & matches, const regex & regex );

    inline bool regex_match(const std::string & s, smatch & matches, const regex & regex)
    { return regex_match( s.c_str(), matches, regex ); }

    bool regex_match( const char * s, const regex & regex );

    inline bool regex_match( const std::string & s, const regex & regex )
    { return regex_match( s.c_str(), regex ); }

    class regex
    {
    public:

      enum RegFlags {
        icase           = REG_ICASE,    
        nosubs          = REG_NOSUB,    
        match_extended  = REG_EXTENDED, 
      };

      regex();
      regex(const std::string& s,int flags = match_extended);
      ~regex() throw();

      regex(const regex & rhs)
      { assign(rhs.m_str, rhs.m_flags); }

      regex & operator=(const regex & rhs)
      { assign(rhs.m_str, rhs.m_flags); return *this; }

      std::string asString() const
      { return m_str; }

    public:
      regex_t * get()
      { return & m_preg; }

    private:
      void assign(const std::string& s,int flags = match_extended);

    private:
      friend class smatch;
      friend bool regex_match(const char * s, str::smatch& matches, const regex& regex);
      friend bool regex_match(const char * s,  const regex& regex);
      std::string m_str;
      int m_flags;
      regex_t m_preg;
      bool m_valid;
    };

    inline std::ostream & operator<<( std::ostream & str, const regex & obj )
    { return str << obj.asString(); }

    class smatch
    {
    public:
      smatch();

      std::string operator[](unsigned i) const;

      unsigned size() const;

      std::string::size_type begin( unsigned i ) const;

      std::string::size_type end( unsigned i ) const;

      std::string::size_type size( unsigned i ) const;

      std::string match_str;
      regmatch_t pmatch[12];
    };

  } // namespace str
} // namespace zypp
#endif // ZYPP_BASE_STRING_H