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Diffstat (limited to '')
| -rw-r--r-- | libdb/mydbm.h | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/libdb/mydbm.h b/libdb/mydbm.h new file mode 100644 index 0000000..370a91a --- /dev/null +++ b/libdb/mydbm.h @@ -0,0 +1,200 @@ +/* + * mydbm.h: database interface definitions and prototypes. + * + * Copyright (C) 1994, 1995, Graeme W. Wilford. (Wilf.) + * + * This file is part of man-db. + * + * man-db 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. + * + * man-db 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 man-db; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * + * Header file to make programming independent of db type used + * + * Currently satisfies: + * + * *hash based* + * GNU dbm: (gdbm & ndbm) + * Berkeley db: (ndbm) + * `native': (ndbm) + * + * *binary tree based* + * Berkeley db: (BTREE) + * + * Tue Apr 26 12:56:44 BST 1994 Wilf. (G.Wilford@ee.surrey.ac.uk) + */ + +#ifndef MYDBM_H +# define MYDBM_H + +# include <stdbool.h> + +# include "timespec.h" +# include "xvasprintf.h" + +# if defined(GDBM) && !defined(NDBM) && !defined(BTREE) + +# include <gdbm.h> + +# ifndef HAVE_GDBM_EXISTS +extern int gdbm_exists (GDBM_FILE db, datum key); +# endif /* !HAVE_GDBM_EXISTS */ + +/* gdbm_nextkey() is not lexicographically sorted, so we need to keep the + * filename around to use as a hash key. + */ +typedef struct { + char *name; + GDBM_FILE file; + struct timespec *mtime; +} *man_gdbm_wrapper; + +man_gdbm_wrapper man_gdbm_new (const char *name); +bool man_gdbm_open_wrapper (man_gdbm_wrapper wrap, int flags); +datum man_gdbm_firstkey (man_gdbm_wrapper wrap); +datum man_gdbm_nextkey (man_gdbm_wrapper wrap, datum key); +struct timespec man_gdbm_get_time (man_gdbm_wrapper wrap); +void man_gdbm_free (man_gdbm_wrapper wrap); + +# define BLK_SIZE 0 /* to invoke normal fs block size */ +# define DB_EXT ".db" +# define MYDBM_FILE man_gdbm_wrapper +# define MYDBM_NEW(file) man_gdbm_new(file) +# define MYDBM_DPTR(d) ((d).dptr) +# define MYDBM_SET_DPTR(d, value) ((d).dptr = (value)) +# define MYDBM_DSIZE(d) ((d).dsize) +# define MYDBM_CTRWOPEN(wrap) \ + man_gdbm_open_wrapper(wrap, GDBM_NEWDB|GDBM_FAST) +# define MYDBM_RWOPEN(wrap) \ + man_gdbm_open_wrapper(wrap, GDBM_WRITER|GDBM_FAST) +# define MYDBM_RDOPEN(wrap) \ + man_gdbm_open_wrapper(wrap, GDBM_READER) +# define MYDBM_INSERT(db, key, cont) gdbm_store((db)->file, key, cont, GDBM_INSERT) +# define MYDBM_REPLACE(db, key, cont) gdbm_store((db)->file, key, cont, GDBM_REPLACE) +# define MYDBM_EXISTS(db, key) gdbm_exists((db)->file, key) +# define MYDBM_DELETE(db, key) gdbm_delete((db)->file, key) +# define MYDBM_FETCH(db, key) gdbm_fetch((db)->file, key) +# define MYDBM_FREE(db) man_gdbm_free(db) +# define MYDBM_FIRSTKEY(db) man_gdbm_firstkey(db) +# define MYDBM_NEXTKEY(db, key) man_gdbm_nextkey(db, key) +# define MYDBM_GET_TIME(db) man_gdbm_get_time(db) + +# elif defined(NDBM) && !defined(GDBM) && !defined(BTREE) + +# include <fcntl.h> +# include <ndbm.h> + +/* Berkeley db routines emulate ndbm but don't add .dir & .pag, just .db! */ +# ifdef _DB_H_ /* has Berkeley db.h been included? */ +# define BERKELEY_DB +# endif /* _DB_H_ */ + +typedef struct { + char *name; + DBM *file; + struct timespec *mtime; +} *man_ndbm_wrapper; + +extern man_ndbm_wrapper man_ndbm_new (const char *name); +extern bool man_ndbm_open (man_ndbm_wrapper wrap, int flags, int mode); +extern datum man_ndbm_firstkey (man_ndbm_wrapper wrap); +extern datum man_ndbm_nextkey (man_ndbm_wrapper wrap, datum key); +extern struct timespec man_ndbm_get_time (man_ndbm_wrapper wrap); +extern void man_ndbm_free (man_ndbm_wrapper wrap); + +# define DB_EXT "" +# define MYDBM_FILE man_ndbm_wrapper +# define MYDBM_NEW(file) man_ndbm_new(file) +# define MYDBM_DPTR(d) ((d).dptr) +# define MYDBM_SET_DPTR(d, value) ((d).dptr = (value)) +# define MYDBM_DSIZE(d) ((d).dsize) +# define MYDBM_CTRWOPEN(wrap) man_ndbm_open(wrap, O_TRUNC|O_CREAT|O_RDWR, DBMODE) +# define MYDBM_RWOPEN(wrap) man_ndbm_open(wrap, O_RDWR, DBMODE) +# define MYDBM_RDOPEN(wrap) man_ndbm_open(wrap, O_RDONLY, DBMODE) +# define MYDBM_INSERT(db, key, cont) dbm_store((db)->file, key, cont, DBM_INSERT) +# define MYDBM_REPLACE(db, key, cont) dbm_store((db)->file, key, cont, DBM_REPLACE) +# define MYDBM_EXISTS(db, key) (dbm_fetch((db)->file, key).dptr != NULL) +# define MYDBM_DELETE(db, key) dbm_delete((db)->file, key) +# define MYDBM_FETCH(db, key) copy_datum(dbm_fetch((db)->file, key)) +# define MYDBM_FREE(db) man_ndbm_free(db) +# define MYDBM_FIRSTKEY(db) man_ndbm_firstkey(db) +# define MYDBM_NEXTKEY(db, key) man_ndbm_nextkey(db, key) +# define MYDBM_GET_TIME(db) man_ndbm_get_time(db) + +# elif defined(BTREE) && !defined(NDBM) && !defined(GDBM) + +# include <sys/types.h> +# include <fcntl.h> +# include <limits.h> +# include BDB_H + +typedef struct { + char *name; + DB *file; + struct timespec *mtime; +} *man_btree_wrapper; + +typedef DBT datum; + +extern man_btree_wrapper man_btree_new (const char *filename); +extern bool man_btree_open (man_btree_wrapper wrap, int flags, int mode); +extern void man_btree_free (man_btree_wrapper wrap); +extern int man_btree_exists (man_btree_wrapper wrap, datum key); +extern datum man_btree_fetch (man_btree_wrapper wrap, datum key); +extern int man_btree_insert (man_btree_wrapper wrap, datum key, datum cont); +extern datum man_btree_firstkey (man_btree_wrapper wrap); +extern datum man_btree_nextkey (man_btree_wrapper wrap); +extern int man_btree_replace (man_btree_wrapper wrap, + datum key, datum content); +extern int man_btree_nextkeydata (man_btree_wrapper wrap, + datum *key, datum *cont); +extern struct timespec man_btree_get_time (man_btree_wrapper wrap); + +# define DB_EXT ".bt" +# define MYDBM_FILE man_btree_wrapper +# define MYDBM_NEW(file) man_btree_new(file) +# define MYDBM_DPTR(d) ((char *) (d).data) +# define MYDBM_SET_DPTR(d, value) ((d).data = (char *) (value)) +# define MYDBM_DSIZE(d) ((d).size) +# define MYDBM_CTRWOPEN(wrap) man_btree_open(wrap, O_TRUNC|O_CREAT|O_RDWR, DBMODE) +# define MYDBM_RWOPEN(wrap) man_btree_open(wrap, O_RDWR, DBMODE) +# define MYDBM_RDOPEN(wrap) man_btree_open(wrap, O_RDONLY, DBMODE) +# define MYDBM_INSERT(db, key, cont) man_btree_insert(db, key, cont) +# define MYDBM_REPLACE(db, key, cont) man_btree_replace(db, key, cont) +# define MYDBM_EXISTS(db, key) man_btree_exists(db, key) +# define MYDBM_DELETE(db, key) (((db)->file->del)((db)->file, &key, 0) ? -1 : 0) +# define MYDBM_FETCH(db, key) man_btree_fetch(db, key) +# define MYDBM_FREE(db) man_btree_free(db) +# define MYDBM_FIRSTKEY(db) man_btree_firstkey(db) +# define MYDBM_NEXTKEY(db, key) man_btree_nextkey(db) +# define MYDBM_GET_TIME(db) man_btree_get_time(db) + +# else /* not GDBM or NDBM or BTREE */ +# error Define either GDBM, NDBM or BTREE before including mydbm.h +# endif /* not GDBM or NDBM or BTREE */ + +#define MYDBM_RESET_DSIZE(d) (MYDBM_DSIZE(d) = strlen(MYDBM_DPTR(d)) + 1) +#define MYDBM_SET(d, value) do { MYDBM_SET_DPTR(d, value); MYDBM_RESET_DSIZE(d); } while (0) +#define MYDBM_FREE_DPTR(d) do { free (MYDBM_DPTR (d)); MYDBM_SET_DPTR (d, NULL); } while (0) + +/* db_lookup.c */ +extern datum copy_datum (datum dat); + +/* db_ver.c */ +extern void dbver_wr(MYDBM_FILE dbfile); +extern int dbver_rd(MYDBM_FILE dbfile); + +#define MAN_DB "/index" DB_EXT +#define mkdbname(path) xasprintf ("%s%s", path, MAN_DB) + +#endif /* MYDBM_H */ |