// Copyright (c) 2002 David Muse
// See the COPYING file for more information.

#ifndef RUDIMENTS_HOSTENTRY_H
#define RUDIMENTS_HOSTENTRY_H

#include <rudiments/private/config.h>

#if !defined(HAVE_GETHOSTBYNAME_R) || !defined(HAVE_GETHOSTBYADDR_R)
        #include <pthread.h>
#endif

#include <netdb.h>

// The hostentry class provides methods for retrieving entries from /etc/hosts

class hostentry {
        public:

                // if you need to quickly look up a specific field, use one of
                // these methods
                static  int     getAliasList(const char *hostname,
                                                char ***aliaslist);
                static  int     getAddressType(const char *hostname,
                                                int *addresstype);
                static  int     getAddressLength(const char *hostname,
                                                int *addresslength);
                static  int     getAddressList(const char *hostname,
                                                char ***addresslist);
                static  int     getAddressString(const char *hostname,
                                                int index,
                                                char **addressstring);

                static  int     getName(const char *address,
                                                int len, int type,
                                                char **name);
                static  int     getAliasList(const char *address,
                                                int len, int type,
                                                char ***aliaslist);
                static  int     getAddressList(const char *address,
                                                int len, int type,
                                                char ***addresslist);
                static  int     getAddressString(const char *address,
                                                int len, int type,
                                                int index,
                                                char **addressstring);

                // if you need to look up a host entry and refer to multiple
                // fields, use these methods
                        hostentry();
                        ~hostentry();

                int     initialize(const char *hostname);
                        // looks up a host entry by name
                int     initialize(const char *address, int len, int type);
                        // looks up a host entry by address

                char    *getName() const;
                char    **getAliasList() const;
                int     getAddressType() const;
                int     getAddressLength() const;
                char    **getAddressList() const;
                char    *getAddressString(int index) const;

                void    print() const;
                        // prints out the host entry

                static  int     needsMutex();
                        // If your system doesn't support gethostbyname_r()
                        // and gethostbyaddr_r() then this class needs a
                        // mutex to assure thread safety.
                        //
                        // This method returns 1 if this class needs a mutex to
                        // operate safely in a threaded environment and 0
                        // otherwise.
                static  void    setMutex(pthread_mutex_t *mutex);
                        // Allows you to supply a mutex is the class needs it.
                        // If your application is not multithreaded, then
                        // there is no need to supply a mutex.

        #include <rudiments/private/hostentry.h>
};

#ifdef ENABLE_RUDIMENTS_INLINES
        #include <rudiments/private/hostentryinlines.h>
#endif

#endif