/* GNU mailutils - a suite of utilities for electronic mail
   Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Library Public License as published by
   the Free Software Foundation; either version 2, 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 Library General Public License for more details.

   You should have received a copy of the GNU Library General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */

#ifndef _MAILUTILS_MUTIL_H
#define _MAILUTILS_MUTIL_H

/*
   Collection of useful utility routines that are worth sharing,
   but don't have a natural home somewhere else.
*/

#include <time.h>

#include <mailutils/list.h>
#include <mailutils/types.h>

#ifdef __cplusplus
extern "C" {
#endif

extern unsigned long mu_hex2ul __P ((char hex));
extern size_t mu_hexstr2ul __P ((unsigned long* ul, const char* hex, size_t len));

struct mu_timezone
{
  int utc_offset;
    /* Seconds east of UTC. */

  const char *tz_name;
    /* Nickname for this timezone, if known. It is always considered
     * to be a pointer to static string, so will never be freed. */
};

typedef struct mu_timezone mu_timezone;

extern int mu_parse_imap_date_time __P ((const char **p, struct tm * tm,
					 mu_timezone * tz));
extern int mu_parse_ctime_date_time __P ((const char **p, struct tm * tm,
					 mu_timezone * tz));

extern time_t mu_utc_offset __P ((void));
extern time_t mu_tm2time __P ((struct tm * timeptr, mu_timezone * tz));
extern char * mu_get_homedir __P ((void));
extern char * mu_tilde_expansion __P ((const char *ref, const char *delim, const char *homedir));

extern size_t mu_cpystr __P ((char *dst, const char *src, size_t size));

struct passwd;

extern void mu_register_getpwnam __P((struct passwd *(*fun) __P((const char *))));
extern void mu_register_getpwuid __P((struct passwd *(*fun) __P((uid_t))));  
extern struct passwd * mu_getpwnam __P((const char *name));
extern struct passwd * mu_getpwuid __P((uid_t uid));
  
extern int mu_virtual_domain;

extern struct passwd * getpwnam_virtual __P((const char *u));

/* Get the host name, doing a gethostbyname() if possible.
 *
 * It is the caller's responsibility to free host.
 */
extern int mu_get_host_name __P((char **host));

/* Set the default user email address.
 *
 * Subsequent calls to mu_get_user_email() with a NULL name will return this
 * email address.  email is parsed to determine that it consists of a a valid
 * rfc822 address, with one valid addr-spec, i.e, the address must be
 * qualified.
 */
extern int mu_set_user_email __P ((const char *email));

/* Set the default user email address domain.
 *
 * Subsequent calls to mu_get_user_email() with a non-null name will return
 * email addresses in this domain (name@domain). It should be fully
 * qualified, but this isn't (and can't) be enforced.
 */
extern int mu_set_user_email_domain __P ((const char *domain));

/* Return the currently set user email domain, or NULL if not set. */
extern int mu_get_user_email_domain __P ((const char** domain));

/*
 * Get the default email address for user name. A NULL name is taken
 * to mean the current user.
 *
 * The result must be freed by the caller after use.
 */
extern char *mu_get_user_email __P ((const char *name));

extern char *mu_normalize_path __P ((char *path, const char *delim));
extern char *mu_normalize_maildir __P ((const char *dir));
extern int mu_tempfile __P ((const char *tmpdir, char **namep));

extern char * mu_get_full_path __P((const char *file));
extern char * mu_getcwd __P((void));
  
extern int mu_spawnvp(const char* prog, const char* const av[], int* stat);

typedef void *(*mu_retrieve_fp) __P((void *));
extern void mu_register_retriever __P((list_t *pflist, mu_retrieve_fp fun));
extern void * mu_retrieve __P((list_t flist, void *data));

extern int mu_unroll_symlink __P((char *out, size_t outsz, const char *in));
  
#ifdef __cplusplus
}
#endif

#endif