mkmap.h

[詳解]

#ifndef _MKMAP_H_INCLUDED_
#define _MKMAP_H_INCLUDED_

/*++
/* NAME
/*  mkmap 3h
/* SUMMARY
/*  create or rewrite Postfix database
/* SYNOPSIS
/*  #include <mkmap.h>
/* DESCRIPTION
/* .nf

 /*
  * Utility library.
  */
#include <dict.h>

 /*
  * A database handle is an opaque structure. The user is not supposed to
  * know its implementation. We try to open and lock a file before DB/DBM
  * initialization. However, if the file does not exist then we may have to
  * acquire the lock after the DB/DBM initialization.
  */
typedef struct MKMAP {
    DICT_OPEN_FN open;          /* dict_xx_open() */
    struct DICT *dict;          /* dict_xx_open() result */
    void    (*after_open) (struct MKMAP *); /* may be null */
    void    (*after_close) (struct MKMAP *);    /* may be null */
    int     multi_writer;       /* multi-writer safe */
} MKMAP;

extern MKMAP *mkmap_open(const char *, const char *, int, int);
extern void mkmap_append(MKMAP *, const char *, const char *);
extern void mkmap_close(MKMAP *);

#define mkmap_append(map, key, val) dict_put((map)->dict, (key), (val))

extern MKMAP *mkmap_dbm_open(const char *);
extern MKMAP *mkmap_cdb_open(const char *);
extern MKMAP *mkmap_hash_open(const char *);
extern MKMAP *mkmap_btree_open(const char *);
extern MKMAP *mkmap_lmdb_open(const char *);
extern MKMAP *mkmap_sdbm_open(const char *);
extern MKMAP *mkmap_proxy_open(const char *);
extern MKMAP *mkmap_fail_open(const char *);

typedef MKMAP *(*MKMAP_OPEN_FN) (const char *);
typedef MKMAP_OPEN_FN (*MKMAP_OPEN_EXTEND_FN) (const char *);
extern void mkmap_open_register(const char *, MKMAP_OPEN_FN);
extern MKMAP_OPEN_EXTEND_FN mkmap_open_extend(MKMAP_OPEN_EXTEND_FN);

/* LICENSE
/* .ad
/* .fi
/*  The Secure Mailer license must be distributed with this software.
/* AUTHOR(S)
/*  Wietse Venema
/*  IBM T.J. Watson Research
/*  P.O. Box 704
/*  Yorktown Heights, NY 10598, USA
/*--*/

#endif