xref: /titanic_41/usr/src/cmd/sendmail/db/db.h (revision 7c478bd95313f5f23a4c958a745db2134aa03244)
1 /*-
2  * See the file LICENSE for redistribution information.
3  *
4  * Copyright (c) 1996, 1997, 1998
5  *	Sleepycat Software.  All rights reserved.
6  *
7  *	@(#)db.h	10.174 (Sleepycat) 1/3/99
8  */
9 
10 #ifndef _DB_H_
11 #define	_DB_H_
12 
13 #ifndef __NO_SYSTEM_INCLUDES
14 #include <sys/types.h>
15 
16 #include <stdio.h>
17 #endif
18 
19 /*
20  * XXX
21  * MacOS: ensure that Metrowerks C makes enumeration types int sized.
22  */
23 #ifdef __MWERKS__
24 #pragma enumsalwaysint on
25 #endif
26 
27 /*
28  * XXX
29  * Handle function prototypes and the keyword "const".  This steps on name
30  * space that DB doesn't control, but all of the other solutions are worse.
31  *
32  * XXX
33  * While Microsoft's compiler is ANSI C compliant, it doesn't have _STDC_
34  * defined by default, you specify a command line flag or #pragma to turn
35  * it on.  Don't do that, however, because some of Microsoft's own header
36  * files won't compile.
37  */
38 #undef	__P
39 #if defined(__STDC__) || defined(__cplusplus) || defined(_MSC_VER)
40 #define	__P(protos)	protos		/* ANSI C prototypes */
41 #else
42 #define	const
43 #define	__P(protos)	()		/* K&R C preprocessor */
44 #endif
45 
46 /*
47  * !!!
48  * DB needs basic information about specifically sized types.  If they're
49  * not provided by the system, typedef them here.
50  *
51  * We protect them against multiple inclusion using __BIT_TYPES_DEFINED__,
52  * as does BIND and Kerberos, since we don't know for sure what #include
53  * files the user is using.
54  *
55  * !!!
56  * We also provide the standard u_int, u_long etc., if they're not provided
57  * by the system.
58  */
59 #ifndef	__BIT_TYPES_DEFINED__
60 #define	__BIT_TYPES_DEFINED__
61 typedef unsigned char u_int8_t;
62 
63 typedef unsigned short u_int16_t;
64 
65 typedef unsigned int u_int32_t;
66 #endif
67 
68 
69 
70 
71 
72 
73 #define	DB_VERSION_MAJOR	2
74 #define	DB_VERSION_MINOR	7
75 #define	DB_VERSION_PATCH	7
76 #define	DB_VERSION_STRING	"Sleepycat Software: Berkeley DB 2.7.7: (08/20/99)"
77 
78 typedef	u_int32_t	db_pgno_t;	/* Page number type. */
79 typedef	u_int16_t	db_indx_t;	/* Page offset type. */
80 #define	DB_MAX_PAGES	0xffffffff	/* >= # of pages in a file */
81 
82 typedef	u_int32_t	db_recno_t;	/* Record number type. */
83 #define	DB_MAX_RECORDS	0xffffffff	/* >= # of records in a tree */
84 
85 typedef size_t		DB_LOCK;	/* Object returned by lock manager. */
86 
87 /* Forward structure declarations, so applications get type checking. */
88 struct __db;		typedef struct __db DB;
89 #ifdef DB_DBM_HSEARCH
90 			typedef struct __db DBM;
91 #endif
92 struct __db_bt_stat;	typedef struct __db_bt_stat DB_BTREE_STAT;
93 struct __db_dbt;	typedef struct __db_dbt DBT;
94 struct __db_env;	typedef struct __db_env DB_ENV;
95 struct __db_ilock;	typedef struct __db_ilock DB_LOCK_ILOCK;
96 struct __db_info;	typedef struct __db_info DB_INFO;
97 struct __db_lock_stat;	typedef struct __db_lock_stat DB_LOCK_STAT;
98 struct __db_lockregion;	typedef struct __db_lockregion DB_LOCKREGION;
99 struct __db_lockreq;	typedef struct __db_lockreq DB_LOCKREQ;
100 struct __db_locktab;	typedef struct __db_locktab DB_LOCKTAB;
101 struct __db_log;	typedef struct __db_log DB_LOG;
102 struct __db_log_stat;	typedef struct __db_log_stat DB_LOG_STAT;
103 struct __db_lsn;	typedef struct __db_lsn DB_LSN;
104 struct __db_mpool;	typedef struct __db_mpool DB_MPOOL;
105 struct __db_mpool_finfo;typedef struct __db_mpool_finfo DB_MPOOL_FINFO;
106 struct __db_mpool_fstat;typedef struct __db_mpool_fstat DB_MPOOL_FSTAT;
107 struct __db_mpool_stat;	typedef struct __db_mpool_stat DB_MPOOL_STAT;
108 struct __db_mpoolfile;	typedef struct __db_mpoolfile DB_MPOOLFILE;
109 struct __db_txn;	typedef struct __db_txn DB_TXN;
110 struct __db_txn_active;	typedef struct __db_txn_active DB_TXN_ACTIVE;
111 struct __db_txn_stat;	typedef struct __db_txn_stat DB_TXN_STAT;
112 struct __db_txnmgr;	typedef struct __db_txnmgr DB_TXNMGR;
113 struct __db_txnregion;	typedef struct __db_txnregion DB_TXNREGION;
114 struct __dbc;		typedef struct __dbc DBC;
115 
116 /* Key/data structure -- a Data-Base Thang. */
117 struct __db_dbt {
118 	void	 *data;			/* key/data */
119 	u_int32_t size;			/* key/data length */
120 	u_int32_t ulen;			/* RO: length of user buffer. */
121 	u_int32_t dlen;			/* RO: get/put record length. */
122 	u_int32_t doff;			/* RO: get/put record offset. */
123 
124 #define	DB_DBT_INTERNAL	0x01		/* Ignore user's malloc (internal). */
125 #define	DB_DBT_MALLOC	0x02		/* Return in allocated memory. */
126 #define	DB_DBT_PARTIAL	0x04		/* Partial put/get. */
127 #define	DB_DBT_USERMEM	0x08		/* Return in user's memory. */
128 	u_int32_t flags;
129 };
130 
131 /*
132  * DB run-time interface configuration.
133  *
134  * There are a set of functions that the application can replace with its
135  * own versions, and some other knobs which can be turned at run-time.
136  */
137 #define	DB_FUNC_CLOSE	 1		/* POSIX 1003.1 close. */
138 #define	DB_FUNC_DIRFREE	 2		/* DB: free directory list. */
139 #define	DB_FUNC_DIRLIST	 3		/* DB: create directory list. */
140 #define	DB_FUNC_EXISTS	 4		/* DB: return if file exists. */
141 #define	DB_FUNC_FREE	 5		/* ANSI C free. */
142 #define	DB_FUNC_FSYNC	 6		/* POSIX 1003.1 fsync. */
143 #define	DB_FUNC_IOINFO	 7		/* DB: return file I/O information. */
144 #define	DB_FUNC_MALLOC	 8		/* ANSI C malloc. */
145 #define	DB_FUNC_MAP	 9		/* DB: map file into shared memory. */
146 #define	DB_FUNC_OPEN	10		/* POSIX 1003.1 open. */
147 #define	DB_FUNC_READ	11		/* POSIX 1003.1 read. */
148 #define	DB_FUNC_REALLOC	12		/* ANSI C realloc. */
149 #define	DB_FUNC_RUNLINK	13		/* DB: remove a shared region. */
150 #define	DB_FUNC_SEEK	14		/* POSIX 1003.1 lseek. */
151 #define	DB_FUNC_SLEEP	15		/* DB: sleep secs/usecs. */
152 #define	DB_FUNC_UNLINK	16		/* POSIX 1003.1 unlink. */
153 #define	DB_FUNC_UNMAP	17		/* DB: unmap shared memory file. */
154 #define	DB_FUNC_WRITE	18		/* POSIX 1003.1 write. */
155 #define	DB_FUNC_YIELD	19		/* DB: yield thread to scheduler. */
156 #define	DB_MUTEXLOCKS	20		/* DB: turn off all mutex locks. */
157 #define	DB_PAGEYIELD	21		/* DB: yield the CPU on pool get. */
158 #define	DB_REGION_ANON	22		/* DB: anonymous, unnamed regions. */
159 #define	DB_REGION_INIT	23		/* DB: page-fault regions in create. */
160 #define	DB_REGION_NAME	24		/* DB: anonymous, named regions. */
161 #define	DB_TSL_SPINS	25		/* DB: initialize spin count. */
162 
163 /*
164  * Database configuration and initialization.
165  */
166  /*
167   * Flags understood by both db_open(3) and db_appinit(3).
168   */
169 #define	DB_CREATE	      0x000001	/* O_CREAT: create file as necessary. */
170 #define	DB_NOMMAP	      0x000002	/* Don't mmap underlying file. */
171 #define	DB_THREAD	      0x000004	/* Free-thread DB package handles. */
172 
173 /*
174  * Flags understood by db_appinit(3).
175  */
176 /*			      0x000007	   COMMON MASK. */
177 #define	DB_INIT_CDB	      0x000008	/* Concurrent Access Methods. */
178 #define	DB_INIT_LOCK	      0x000010	/* Initialize locking. */
179 #define	DB_INIT_LOG	      0x000020	/* Initialize logging. */
180 #define	DB_INIT_MPOOL	      0x000040	/* Initialize mpool. */
181 #define	DB_INIT_TXN	      0x000080	/* Initialize transactions. */
182 #define	DB_MPOOL_PRIVATE      0x000100	/* Mpool: private memory pool. */
183 #define	DB_RECOVER	      0x000200	/* Run normal recovery. */
184 #define	DB_RECOVER_FATAL      0x000400	/* Run catastrophic recovery. */
185 #define	DB_TXN_NOSYNC	      0x000800	/* Do not sync log on commit. */
186 #define	DB_USE_ENVIRON	      0x001000	/* Use the environment. */
187 #define	DB_USE_ENVIRON_ROOT   0x002000	/* Use the environment if root. */
188 
189 /*
190  * Flags understood by db_open(3).
191  *
192  * DB_EXCL and DB_TEMPORARY are internal only, and are not documented.
193  * DB_SEQUENTIAL is currently internal, but may be exported some day.
194  */
195 /*			      0x000007	   COMMON MASK. */
196 /*			      0x001fff	   ALREADY USED. */
197 #define	DB_EXCL		      0x002000	/* O_EXCL: exclusive open (internal). */
198 #define	DB_RDONLY	      0x004000	/* O_RDONLY: read-only. */
199 #define	DB_SEQUENTIAL	      0x008000	/* Sequential access (internal). */
200 #define	DB_TEMPORARY	      0x010000	/* Remove on last close (internal). */
201 #define	DB_TRUNCATE	      0x020000	/* O_TRUNCATE: replace existing DB. */
202 #define	DB_FCNTL_LOCKING      0x040000	/* Undocumented: fcntl(2) locking. */
203 
204 /*
205  * Deadlock detector modes; used in the DBENV structure to configure the
206  * locking subsystem.
207  */
208 #define	DB_LOCK_NORUN		0
209 #define	DB_LOCK_DEFAULT		1	/* Default policy. */
210 #define	DB_LOCK_OLDEST		2	/* Abort oldest transaction. */
211 #define	DB_LOCK_RANDOM		3	/* Abort random transaction. */
212 #define	DB_LOCK_YOUNGEST	4	/* Abort youngest transaction. */
213 
214 struct __db_env {
215 	int		 db_lorder;	/* Byte order. */
216 
217 					/* Error message callback. */
218 	void (*db_errcall) __P((const char *, char *));
219 	FILE		*db_errfile;	/* Error message file stream. */
220 	const char	*db_errpfx;	/* Error message prefix. */
221 	int		 db_verbose;	/* Generate debugging messages. */
222 	int		 db_panic;	/* Panic flag, callback function. */
223 	void (*db_paniccall) __P((DB_ENV *, int));
224 
225 	/* User paths. */
226 	char		*db_home;	/* Database home. */
227 	char		*db_log_dir;	/* Database log file directory. */
228 	char		*db_tmp_dir;	/* Database tmp file directory. */
229 
230 	char	       **db_data_dir;	/* Database data file directories. */
231 	int		 data_cnt;	/* Database data file slots. */
232 	int		 data_next;	/* Next Database data file slot. */
233 
234 	/* Locking. */
235 	DB_LOCKTAB	*lk_info;	/* Return from lock_open(). */
236 	const u_int8_t	*lk_conflicts;	/* Two dimensional conflict matrix. */
237 	u_int32_t	 lk_modes;	/* Number of lock modes in table. */
238 	u_int32_t	 lk_max;	/* Maximum number of locks. */
239 	u_int32_t	 lk_detect;	/* Deadlock detect on all conflicts. */
240 
241 	/* Logging. */
242 	DB_LOG		*lg_info;	/* Return from log_open(). */
243 	u_int32_t	 lg_max;	/* Maximum file size. */
244 
245 	/* Memory pool. */
246 	DB_MPOOL	*mp_info;	/* Return from memp_open(). */
247 	size_t		 mp_mmapsize;	/* Maximum file size for mmap. */
248 	size_t		 mp_size;	/* Bytes in the mpool cache. */
249 
250 	/* Transactions. */
251 	DB_TXNMGR	*tx_info;	/* Return from txn_open(). */
252 	u_int32_t	 tx_max;	/* Maximum number of transactions. */
253 	int (*tx_recover)		/* Dispatch function for recovery. */
254 	    __P((DB_LOG *, DBT *, DB_LSN *, int, void *));
255 
256 	/*
257 	 * XA support.
258 	 *
259 	 * !!!
260 	 * Explicit representations of structures in queue.h.
261 	 *
262 	 * TAILQ_ENTRY(__db_env);
263 	 */
264 	struct {
265 		struct __db_env *tqe_next;
266 		struct __db_env **tqe_prev;
267 	} links;
268 	int		 xa_rmid;	/* XA Resource Manager ID. */
269 	DB_TXN		*xa_txn;	/* XA Current transaction. */
270 
271 #define	DB_ENV_APPINIT		0x01	/* Paths initialized by db_appinit(). */
272 #define	DB_ENV_CDB		0x02	/* Concurrent DB product. */
273 #define	DB_ENV_STANDALONE	0x04	/* Test: freestanding environment. */
274 #define	DB_ENV_THREAD		0x08	/* DB_ENV is multi-threaded. */
275 	u_int32_t	 flags;		/* Flags. */
276 };
277 
278 /*******************************************************
279  * Access methods.
280  *******************************************************/
281 /*
282  * !!!
283  * Changes here must be reflected in java/src/com/sleepycat/db/Db.java.
284  */
285 typedef enum {
286 	DB_BTREE=1,			/* B+tree. */
287 	DB_HASH,			/* Extended Linear Hashing. */
288 	DB_RECNO,			/* Fixed and variable-length records. */
289 	DB_UNKNOWN			/* Figure it out on open. */
290 } DBTYPE;
291 
292 #define	DB_BTREEVERSION	6		/* Current btree version. */
293 #define	DB_BTREEOLDVER	6		/* Oldest btree version supported. */
294 #define	DB_BTREEMAGIC	0x053162
295 
296 #define	DB_HASHVERSION	5		/* Current hash version. */
297 #define	DB_HASHOLDVER	4		/* Oldest hash version supported. */
298 #define	DB_HASHMAGIC	0x061561
299 
300 #define	DB_LOGVERSION	2		/* Current log version. */
301 #define	DB_LOGOLDVER	2		/* Oldest log version supported. */
302 #define	DB_LOGMAGIC	0x040988
303 
304 struct __db_info {
305 	int		 db_lorder;	/* Byte order. */
306 	size_t		 db_cachesize;	/* Underlying cache size. */
307 	size_t		 db_pagesize;	/* Underlying page size. */
308 
309 					/* Local heap allocation. */
310 	void *(*db_malloc) __P((size_t));
311 	int (*dup_compare)		/* Duplicate compare function. */
312 	    __P((const DBT *, const DBT *));
313 
314 	/* Btree access method. */
315 	u_int32_t	 bt_maxkey;	/* Maximum keys per page. */
316 	u_int32_t	 bt_minkey;	/* Minimum keys per page. */
317 	int (*bt_compare)		/* Comparison function. */
318 	    __P((const DBT *, const DBT *));
319 	size_t (*bt_prefix)		/* Prefix function. */
320 	    __P((const DBT *, const DBT *));
321 
322 	/* Hash access method. */
323 	u_int32_t 	 h_ffactor;	/* Fill factor. */
324 	u_int32_t	 h_nelem;	/* Number of elements. */
325 	u_int32_t      (*h_hash)	/* Hash function. */
326 	    __P((const void *, u_int32_t));
327 
328 	/* Recno access method. */
329 	int		 re_pad;	/* Fixed-length padding byte. */
330 	int		 re_delim;	/* Variable-length delimiting byte. */
331 	u_int32_t	 re_len;	/* Length for fixed-length records. */
332 	char		*re_source;	/* Source file name. */
333 
334 #define	DB_DELIMITER		0x0001	/* Recno: re_delim set. */
335 #define	DB_DUP			0x0002	/* Btree, Hash: duplicate keys. */
336 #define	DB_DUPSORT		0x0004	/* Btree, Hash: duplicate keys. */
337 #define	DB_FIXEDLEN		0x0008	/* Recno: fixed-length records. */
338 #define	DB_PAD			0x0010	/* Recno: re_pad set. */
339 #define	DB_RECNUM		0x0020	/* Btree: record numbers. */
340 #define	DB_RENUMBER		0x0040	/* Recno: renumber on insert/delete. */
341 #define	DB_SNAPSHOT		0x0080	/* Recno: snapshot the input. */
342 	u_int32_t	 flags;
343 };
344 
345 /*
346  * DB access method and cursor operation values.  Each value is an operation
347  * code to which additional bit flags are added.
348  */
349 #define	DB_AFTER	 1		/* c_put() */
350 #define	DB_APPEND	 2		/* put() */
351 #define	DB_BEFORE	 3		/* c_put() */
352 #define	DB_CHECKPOINT	 4		/* log_put(), log_get() */
353 #define	DB_CURLSN	 5		/* log_put() */
354 #define	DB_CURRENT	 6		/* c_get(), c_put(), log_get() */
355 #define	DB_FIRST	 7		/* c_get(), log_get() */
356 #define	DB_FLUSH	 8		/* log_put() */
357 #define	DB_GET_BOTH	 9		/* get(), c_get() */
358 #define	DB_GET_RECNO	10		/* c_get() */
359 #define	DB_JOIN_ITEM	11		/* c_get(); do not do primary lookup */
360 #define	DB_KEYFIRST	12		/* c_put() */
361 #define	DB_KEYLAST	13		/* c_put() */
362 #define	DB_LAST		14		/* c_get(), log_get() */
363 #define	DB_NEXT		15		/* c_get(), log_get() */
364 #define	DB_NEXT_DUP	16		/* c_get() */
365 #define	DB_NOOVERWRITE	17		/* put() */
366 #define	DB_NOSYNC	18		/* close() */
367 #define	DB_PREV		19		/* c_get(), log_get() */
368 #define	DB_RECORDCOUNT	20		/* stat() */
369 #define	DB_SET		21		/* c_get(), log_get() */
370 #define	DB_SET_RANGE	22		/* c_get() */
371 #define	DB_SET_RECNO	23		/* get(), c_get() */
372 #define	DB_WRITELOCK	24		/* cursor() (internal) */
373 
374 #define	DB_OPFLAGS_MASK	0x1f		/* Mask for operations flags. */
375 #define	DB_RMW		0x80000000	/* Acquire write flag immediately. */
376 
377 /*
378  * DB (user visible) error return codes.
379  *
380  * !!!
381  * Changes to any of the user visible error return codes must be reflected
382  * in java/src/com/sleepycat/db/Db.java.
383  */
384 #define	DB_INCOMPLETE		( -1)	/* Sync didn't finish. */
385 #define	DB_KEYEMPTY		( -2)	/* The key/data pair was deleted or
386 					   was never created by the user. */
387 #define	DB_KEYEXIST		( -3)	/* The key/data pair already exists. */
388 #define	DB_LOCK_DEADLOCK	( -4)	/* Locker killed to resolve deadlock. */
389 #define	DB_LOCK_NOTGRANTED	( -5)	/* Lock unavailable, no-wait set. */
390 #define	DB_LOCK_NOTHELD		( -6)	/* Lock not held by locker. */
391 #define	DB_NOTFOUND		( -7)	/* Key/data pair not found (EOF). */
392 #define	DB_RUNRECOVERY		( -8)	/* Panic return. */
393 
394 /* DB (private) error return codes. */
395 #define	DB_DELETED		( -9)	/* Recovery file marked deleted. */
396 #define	DB_NEEDSPLIT		(-10)	/* Page needs to be split. */
397 #define	DB_SWAPBYTES		(-11)	/* Database needs byte swapping. */
398 #define	DB_TXN_CKP		(-12)	/* Encountered ckp record in log. */
399 
400 #define	DB_FILE_ID_LEN		20	/* DB file ID length. */
401 
402 /* DB access method description structure. */
403 struct __db {
404 	void	*mutexp;		/* Synchronization for free threading */
405 
406 					/* Documented, returned information. */
407 	DBTYPE	 type;			/* DB access method. */
408 	int	 byteswapped;		/* Database byte order is swapped. */
409 	int	 saved_open_fd;		/* For fcntl lock preservation. */
410 
411 	DB_ENV	*dbenv;			/* DB_ENV structure. */
412 	DB_ENV	*mp_dbenv;		/* DB_ENV for local mpool creation. */
413 
414 	void	*internal;		/* Access method private. */
415 
416 	DB_MPOOL	*mp;		/* The access method's mpool. */
417 	DB_MPOOLFILE	*mpf;		/* The access method's mpool file. */
418 
419 	/*
420 	 * !!!
421 	 * Explicit representations of structures in queue.h.
422 	 *
423 	 * TAILQ_HEAD(free_queue, __dbc);
424 	 * TAILQ_HEAD(active_queue, __dbc);
425 	 */
426 	struct {
427 		struct __dbc *tqh_first;
428 		struct __dbc **tqh_last;
429 	} free_queue;
430 	struct {
431 		struct __dbc *tqh_first;
432 		struct __dbc **tqh_last;
433 	} active_queue;
434 
435 	u_int8_t  fileid[DB_FILE_ID_LEN]; /* Uniquely identify this file for
436 					     locking. */
437 	u_int32_t log_fileid;		/* Logging file id. */
438 	size_t	  pgsize;		/* Logical page size of file. */
439 
440 					/* Local heap allocation. */
441 	void *(*db_malloc) __P((size_t));
442 	int (*dup_compare)		/* Duplicate compare function. */
443 	    __P((const DBT *, const DBT *));
444 	u_int32_t (*h_hash)		/* Hash function. */
445 	    __P((const void *, u_int32_t));
446 
447 					/* Functions. */
448 	int (*am_close)	__P((DB *));
449 	int (*close)	__P((DB *, u_int32_t));
450 	int (*cursor)	__P((DB *, DB_TXN *, DBC **, u_int32_t));
451 	int (*del)	__P((DB *, DB_TXN *, DBT *, u_int32_t));
452 	int (*fd)	__P((DB *, int *));
453 	int (*get)	__P((DB *, DB_TXN *, DBT *, DBT *, u_int32_t));
454 	int (*join)	__P((DB *, DBC **, u_int32_t, DBC **));
455 	int (*put)	__P((DB *, DB_TXN *, DBT *, DBT *, u_int32_t));
456 	int (*stat)	__P((DB *, void *, void *(*)(size_t), u_int32_t));
457 	int (*sync)	__P((DB *, u_int32_t));
458 
459 #define	DB_AM_CDB	0x000001	/* Concurrent Access Methods. */
460 #define	DB_AM_DUP	0x000002	/* DB_DUP (internal). */
461 #define	DB_AM_INMEM	0x000004	/* In-memory; no sync on close. */
462 #define	DB_AM_LOCKING	0x000008	/* Perform locking. */
463 #define	DB_AM_LOGGING	0x000010	/* Perform logging. */
464 #define	DB_AM_MLOCAL	0x000020	/* Database memory pool is local. */
465 #define	DB_AM_PGDEF	0x000040	/* Page size was defaulted. */
466 #define	DB_AM_RDONLY	0x000080	/* Database is readonly. */
467 #define	DB_AM_SWAP	0x000100	/* Pages need to be byte-swapped. */
468 #define	DB_AM_THREAD	0x000200	/* DB is multi-threaded. */
469 #define	DB_BT_RECNUM	0x000400	/* DB_RECNUM (internal). */
470 #define	DB_DBM_ERROR	0x000800	/* Error in DBM/NDBM database. */
471 #define	DB_RE_DELIMITER	0x001000	/* DB_DELIMITER (internal). */
472 #define	DB_RE_FIXEDLEN	0x002000	/* DB_FIXEDLEN (internal). */
473 #define	DB_RE_PAD	0x004000	/* DB_PAD (internal). */
474 #define	DB_RE_RENUMBER	0x008000	/* DB_RENUMBER (internal). */
475 #define	DB_RE_SNAPSHOT	0x010000	/* DB_SNAPSHOT (internal). */
476 	u_int32_t flags;
477 };
478 
479 struct __db_ilock {			/* Internal DB access method lock. */
480 	db_pgno_t pgno;			/* Page being locked. */
481 	u_int8_t fileid[DB_FILE_ID_LEN];/* File id. */
482 };
483 
484 /* Cursor description structure. */
485 struct __dbc {
486 	DB *dbp;			/* Related DB access method. */
487 	DB_TXN	 *txn;			/* Associated transaction. */
488 
489 	/*
490 	 * !!!
491 	 * Explicit representations of structures in queue.h.
492 	 *
493 	 * TAILQ_ENTRY(__dbc);
494 	 */
495 	struct {
496 		struct __dbc *tqe_next;
497 		struct __dbc **tqe_prev;
498 	} links;
499 
500 	u_int32_t lid;			/* Default process' locker id. */
501 	u_int32_t locker;		/* Locker for this operation. */
502 	DBT	  lock_dbt;		/* DBT referencing lock. */
503 	DB_LOCK_ILOCK lock;		/* Object to be locked. */
504 	DB_LOCK	mylock;			/* Lock held on this cursor. */
505 
506 	DBT rkey;			/* Returned key. */
507 	DBT rdata;			/* Returned data. */
508 
509 	int (*c_am_close) __P((DBC *));
510 	int (*c_am_destroy) __P((DBC *));
511 	int (*c_close) __P((DBC *));
512 	int (*c_del) __P((DBC *, u_int32_t));
513 	int (*c_get) __P((DBC *, DBT *, DBT *, u_int32_t));
514 	int (*c_put) __P((DBC *, DBT *, DBT *, u_int32_t));
515 
516 	void	 *internal;		/* Access method private. */
517 
518 #define	DBC_CONTINUE	0x001		/* Continue dup search: next item. */
519 #define	DBC_KEYSET	0x002		/* Continue dup search: current item. */
520 #define	DBC_RECOVER	0x004		/* In recovery (do not log or lock). */
521 #define	DBC_RMW		0x008		/* Acquire write flag in read op. */
522 #define	DBC_WRITER	0x010		/* Cursor immediately writing (CDB). */
523 	u_int32_t flags;
524 };
525 
526 /* Btree/recno statistics structure. */
527 struct __db_bt_stat {
528 	u_int32_t bt_flags;		/* Open flags. */
529 	u_int32_t bt_maxkey;		/* Maxkey value. */
530 	u_int32_t bt_minkey;		/* Minkey value. */
531 	u_int32_t bt_re_len;		/* Fixed-length record length. */
532 	u_int32_t bt_re_pad;		/* Fixed-length record pad. */
533 	u_int32_t bt_pagesize;		/* Page size. */
534 	u_int32_t bt_levels;		/* Tree levels. */
535 	u_int32_t bt_nrecs;		/* Number of records. */
536 	u_int32_t bt_int_pg;		/* Internal pages. */
537 	u_int32_t bt_leaf_pg;		/* Leaf pages. */
538 	u_int32_t bt_dup_pg;		/* Duplicate pages. */
539 	u_int32_t bt_over_pg;		/* Overflow pages. */
540 	u_int32_t bt_free;		/* Pages on the free list. */
541 	u_int32_t bt_int_pgfree;	/* Bytes free in internal pages. */
542 	u_int32_t bt_leaf_pgfree;	/* Bytes free in leaf pages. */
543 	u_int32_t bt_dup_pgfree;	/* Bytes free in duplicate pages. */
544 	u_int32_t bt_over_pgfree;	/* Bytes free in overflow pages. */
545 	u_int32_t bt_magic;		/* Magic number. */
546 	u_int32_t bt_version;		/* Version number. */
547 };
548 
549 /* Hash statistics structure. */
550 struct __db_h_stat {
551 	u_int32_t hash_accesses;	/* Number of accesses to this table. */
552 	u_int32_t hash_collisions;	/* Number of collisions on search. */
553 	u_int32_t hash_expansions;	/* Number of times we added a bucket. */
554 	u_int32_t hash_overflows;	/* Number of overflow pages. */
555 	u_int32_t hash_bigpages;	/* Number of big key/data pages. */
556 	u_int32_t hash_dup;		/* Number of dup pages. */
557 	u_int32_t hash_free;		/* Pages on the free list. */
558 	u_int32_t hash_bfree;		/* Bytes free on bucket pages. */
559 	u_int32_t hash_dup_free;	/* Bytes free on duplicate pages. */
560 	u_int32_t hash_big_bfree;	/* Bytes free on big item pages. */
561 	u_int32_t hash_buckets;		/* Number of hash buckets. */
562 	u_int32_t hash_put;		/* Number of puts. */
563 	u_int32_t hash_deleted;		/* Number of deletes. */
564 	u_int32_t hash_get;		/* Number of gets. */
565 	u_int32_t hash_magic;		/* Magic number. */
566 	u_int32_t hash_version;		/* Version number. */
567 	u_int32_t hash_pagesize;	/* Page size. */
568 	u_int32_t hash_nrecs;		/* Number of records. */
569 };
570 
571 #if defined(__cplusplus)
572 extern "C" {
573 #endif
574 int   db_appinit __P((const char *, char * const *, DB_ENV *, u_int32_t));
575 int   db_appexit __P((DB_ENV *));
576 int   db_jump_set __P((void *, int));
577 int   db_open __P((const char *,
578 	  DBTYPE, u_int32_t, int, DB_ENV *, DB_INFO *, DB **));
579 int   db_value_set __P((int, int));
580 char *db_version __P((int *, int *, int *));
581 int   db_xa_open __P((const char *,
582 	  DBTYPE, u_int32_t, int, DB_INFO *, DB **));
583 #if defined(__cplusplus)
584 }
585 #endif
586 
587 /*******************************************************
588  * Locking
589  *******************************************************/
590 #define	DB_LOCKVERSION	1
591 #define	DB_LOCKMAGIC	0x090193
592 
593 /* Flag values for lock_vec(), lock_get(). */
594 #define	DB_LOCK_NOWAIT		0x01	/* Don't wait on unavailable lock. */
595 #define	DB_LOCK_UPGRADE		0x02	/* Upgrade an existing lock instead
596 					   of granting a new one (internal). */
597 
598 /* Flag values for lock_detect(). */
599 #define	DB_LOCK_CONFLICT	0x01	/* Run on any conflict. */
600 
601 /*
602  * Request types.
603  *
604  * !!!
605  * Changes here must be reflected in java/src/com/sleepycat/db/Db.java.
606  */
607 typedef enum {
608 	DB_LOCK_DUMP=0,			/* Display held locks. */
609 	DB_LOCK_GET,			/* Get the lock. */
610 	DB_LOCK_INHERIT,		/* Pass locks to parent. */
611 	DB_LOCK_PUT,			/* Release the lock. */
612 	DB_LOCK_PUT_ALL,		/* Release locker's locks. */
613 	DB_LOCK_PUT_OBJ			/* Release locker's locks on obj. */
614 } db_lockop_t;
615 
616 /*
617  * Simple R/W lock modes and for multi-granularity intention locking.
618  *
619  * !!!
620  * These values are NOT random, as they are used as an index into the lock
621  * conflicts arrays, i.e., DB_LOCK_IWRITE must be == 3, and DB_LOCK_IREAD
622  * must be == 4.
623  *
624  * !!!
625  * Changes here must be reflected in java/src/com/sleepycat/db/Db.java.
626  */
627 typedef enum {
628 	DB_LOCK_NG=0,			/* Not granted. */
629 	DB_LOCK_READ,			/* Shared/read. */
630 	DB_LOCK_WRITE,			/* Exclusive/write. */
631 	DB_LOCK_IWRITE,			/* Intent exclusive/write. */
632 	DB_LOCK_IREAD,			/* Intent to share/read. */
633 	DB_LOCK_IWR			/* Intent to read and write. */
634 } db_lockmode_t;
635 
636 /*
637  * Status of a lock.
638  */
639 typedef enum {
640 	DB_LSTAT_ABORTED,		/* Lock belongs to an aborted txn. */
641 	DB_LSTAT_ERR,			/* Lock is bad. */
642 	DB_LSTAT_FREE,			/* Lock is unallocated. */
643 	DB_LSTAT_HELD,			/* Lock is currently held. */
644 	DB_LSTAT_NOGRANT,		/* Lock was not granted. */
645 	DB_LSTAT_PENDING,		/* Lock was waiting and has been
646 					 * promoted; waiting for the owner
647 					 * to run and upgrade it to held. */
648 	DB_LSTAT_WAITING		/* Lock is on the wait queue. */
649 } db_status_t;
650 
651 /* Lock request structure. */
652 struct __db_lockreq {
653 	db_lockop_t	 op;		/* Operation. */
654 	db_lockmode_t	 mode;		/* Requested mode. */
655 	u_int32_t	 locker;	/* Locker identity. */
656 	DBT		*obj;		/* Object being locked. */
657 	DB_LOCK		 lock;		/* Lock returned. */
658 };
659 
660 /*
661  * Commonly used conflict matrices.
662  *
663  * Standard Read/Write (or exclusive/shared) locks.
664  */
665 #define	DB_LOCK_RW_N	3
666 extern const u_int8_t db_rw_conflicts[];
667 
668 /* Multi-granularity locking. */
669 #define	DB_LOCK_RIW_N	6
670 extern const u_int8_t db_riw_conflicts[];
671 
672 struct __db_lock_stat {
673 	u_int32_t st_magic;		/* Lock file magic number. */
674 	u_int32_t st_version;		/* Lock file version number. */
675 	u_int32_t st_maxlocks;		/* Maximum number of locks in table. */
676 	u_int32_t st_nmodes;		/* Number of lock modes. */
677 	u_int32_t st_numobjs;		/* Number of objects. */
678 	u_int32_t st_nlockers;		/* Number of lockers. */
679 	u_int32_t st_nconflicts;	/* Number of lock conflicts. */
680 	u_int32_t st_nrequests;		/* Number of lock gets. */
681 	u_int32_t st_nreleases;		/* Number of lock puts. */
682 	u_int32_t st_ndeadlocks;	/* Number of lock deadlocks. */
683 	u_int32_t st_region_wait;	/* Region lock granted after wait. */
684 	u_int32_t st_region_nowait;	/* Region lock granted without wait. */
685 	u_int32_t st_refcnt;		/* Region reference count. */
686 	u_int32_t st_regsize;		/* Region size. */
687 };
688 
689 #if defined(__cplusplus)
690 extern "C" {
691 #endif
692 int	  lock_close __P((DB_LOCKTAB *));
693 int	  lock_detect __P((DB_LOCKTAB *, u_int32_t, u_int32_t));
694 int	  lock_get __P((DB_LOCKTAB *,
695 	    u_int32_t, u_int32_t, const DBT *, db_lockmode_t, DB_LOCK *));
696 int	  lock_id __P((DB_LOCKTAB *, u_int32_t *));
697 int	  lock_open __P((const char *,
698 	    u_int32_t, int, DB_ENV *, DB_LOCKTAB **));
699 int	  lock_put __P((DB_LOCKTAB *, DB_LOCK));
700 int	  lock_tget __P((DB_LOCKTAB *,
701 	    DB_TXN *, u_int32_t, const DBT *, db_lockmode_t, DB_LOCK *));
702 int	  lock_stat __P((DB_LOCKTAB *, DB_LOCK_STAT **, void *(*)(size_t)));
703 int	  lock_unlink __P((const char *, int, DB_ENV *));
704 int	  lock_vec __P((DB_LOCKTAB *,
705 	    u_int32_t, u_int32_t, DB_LOCKREQ *, int, DB_LOCKREQ **));
706 int	  lock_tvec __P((DB_LOCKTAB *,
707 	    DB_TXN *, u_int32_t, DB_LOCKREQ *, int, DB_LOCKREQ **));
708 #if defined(__cplusplus)
709 }
710 #endif
711 
712 /*******************************************************
713  * Logging.
714  *******************************************************/
715 /* Flag values for log_archive(). */
716 #define	DB_ARCH_ABS		0x001	/* Absolute pathnames. */
717 #define	DB_ARCH_DATA		0x002	/* Data files. */
718 #define	DB_ARCH_LOG		0x004	/* Log files. */
719 
720 /*
721  * A DB_LSN has two parts, a fileid which identifies a specific file, and an
722  * offset within that file.  The fileid is an unsigned 4-byte quantity that
723  * uniquely identifies a file within the log directory -- currently a simple
724  * counter inside the log.  The offset is also an unsigned 4-byte value.  The
725  * log manager guarantees the offset is never more than 4 bytes by switching
726  * to a new log file before the maximum length imposed by an unsigned 4-byte
727  * offset is reached.
728  */
729 struct __db_lsn {
730 	u_int32_t	file;		/* File ID. */
731 	u_int32_t	offset;		/* File offset. */
732 };
733 
734 /* Log statistics structure. */
735 struct __db_log_stat {
736 	u_int32_t st_magic;		/* Log file magic number. */
737 	u_int32_t st_version;		/* Log file version number. */
738 	int st_mode;			/* Log file mode. */
739 	u_int32_t st_lg_max;		/* Maximum log file size. */
740 	u_int32_t st_w_bytes;		/* Bytes to log. */
741 	u_int32_t st_w_mbytes;		/* Megabytes to log. */
742 	u_int32_t st_wc_bytes;		/* Bytes to log since checkpoint. */
743 	u_int32_t st_wc_mbytes;		/* Megabytes to log since checkpoint. */
744 	u_int32_t st_wcount;		/* Total syncs to the log. */
745 	u_int32_t st_scount;		/* Total writes to the log. */
746 	u_int32_t st_region_wait;	/* Region lock granted after wait. */
747 	u_int32_t st_region_nowait;	/* Region lock granted without wait. */
748 	u_int32_t st_cur_file;		/* Current log file number. */
749 	u_int32_t st_cur_offset;	/* Current log file offset. */
750 	u_int32_t st_refcnt;		/* Region reference count. */
751 	u_int32_t st_regsize;		/* Region size. */
752 };
753 
754 #if defined(__cplusplus)
755 extern "C" {
756 #endif
757 int	 log_archive __P((DB_LOG *, char **[], u_int32_t, void *(*)(size_t)));
758 int	 log_close __P((DB_LOG *));
759 int	 log_compare __P((const DB_LSN *, const DB_LSN *));
760 int	 log_file __P((DB_LOG *, const DB_LSN *, char *, size_t));
761 int	 log_flush __P((DB_LOG *, const DB_LSN *));
762 int	 log_get __P((DB_LOG *, DB_LSN *, DBT *, u_int32_t));
763 int	 log_open __P((const char *, u_int32_t, int, DB_ENV *, DB_LOG **));
764 int	 log_put __P((DB_LOG *, DB_LSN *, const DBT *, u_int32_t));
765 int	 log_register __P((DB_LOG *, DB *, const char *, DBTYPE, u_int32_t *));
766 int	 log_stat __P((DB_LOG *, DB_LOG_STAT **, void *(*)(size_t)));
767 int	 log_unlink __P((const char *, int, DB_ENV *));
768 int	 log_unregister __P((DB_LOG *, u_int32_t));
769 #if defined(__cplusplus)
770 }
771 #endif
772 
773 /*******************************************************
774  * Mpool
775  *******************************************************/
776 /* Flag values for memp_fget(). */
777 #define	DB_MPOOL_CREATE		0x001	/* Create a page. */
778 #define	DB_MPOOL_LAST		0x002	/* Return the last page. */
779 #define	DB_MPOOL_NEW		0x004	/* Create a new page. */
780 
781 /* Flag values for memp_fput(), memp_fset(). */
782 #define	DB_MPOOL_CLEAN		0x001	/* Clear modified bit. */
783 #define	DB_MPOOL_DIRTY		0x002	/* Page is modified. */
784 #define	DB_MPOOL_DISCARD	0x004	/* Don't cache the page. */
785 
786 /* Mpool statistics structure. */
787 struct __db_mpool_stat {
788 	size_t st_cachesize;		/* Cache size. */
789 	u_int32_t st_cache_hit;		/* Pages found in the cache. */
790 	u_int32_t st_cache_miss;	/* Pages not found in the cache. */
791 	u_int32_t st_map;		/* Pages from mapped files. */
792 	u_int32_t st_page_create;	/* Pages created in the cache. */
793 	u_int32_t st_page_in;		/* Pages read in. */
794 	u_int32_t st_page_out;		/* Pages written out. */
795 	u_int32_t st_ro_evict;		/* Clean pages forced from the cache. */
796 	u_int32_t st_rw_evict;		/* Dirty pages forced from the cache. */
797 	u_int32_t st_hash_buckets;	/* Number of hash buckets. */
798 	u_int32_t st_hash_searches;	/* Total hash chain searches. */
799 	u_int32_t st_hash_longest;	/* Longest hash chain searched. */
800 	u_int32_t st_hash_examined;	/* Total hash entries searched. */
801 	u_int32_t st_page_clean;	/* Clean pages. */
802 	u_int32_t st_page_dirty;	/* Dirty pages. */
803 	u_int32_t st_page_trickle;	/* Pages written by memp_trickle. */
804 	u_int32_t st_region_wait;	/* Region lock granted after wait. */
805 	u_int32_t st_region_nowait;	/* Region lock granted without wait. */
806 	u_int32_t st_refcnt;		/* Region reference count. */
807 	u_int32_t st_regsize;		/* Region size. */
808 };
809 
810 /* Mpool file open information structure. */
811 struct __db_mpool_finfo {
812 	int	   ftype;		/* File type. */
813 	DBT	  *pgcookie;		/* Byte-string passed to pgin/pgout. */
814 	u_int8_t  *fileid;		/* Unique file ID. */
815 	int32_t	   lsn_offset;		/* LSN offset in page. */
816 	u_int32_t  clear_len;		/* Cleared length on created pages. */
817 };
818 
819 /* Mpool file statistics structure. */
820 struct __db_mpool_fstat {
821 	char *file_name;		/* File name. */
822 	size_t st_pagesize;		/* Page size. */
823 	u_int32_t st_cache_hit;		/* Pages found in the cache. */
824 	u_int32_t st_cache_miss;	/* Pages not found in the cache. */
825 	u_int32_t st_map;		/* Pages from mapped files. */
826 	u_int32_t st_page_create;	/* Pages created in the cache. */
827 	u_int32_t st_page_in;		/* Pages read in. */
828 	u_int32_t st_page_out;		/* Pages written out. */
829 };
830 
831 #if defined(__cplusplus)
832 extern "C" {
833 #endif
834 int	memp_close __P((DB_MPOOL *));
835 int	memp_fclose __P((DB_MPOOLFILE *));
836 int	memp_fget __P((DB_MPOOLFILE *, db_pgno_t *, u_int32_t, void *));
837 int	memp_fopen __P((DB_MPOOL *, const char *,
838 	    u_int32_t, int, size_t, DB_MPOOL_FINFO *, DB_MPOOLFILE **));
839 int	memp_fput __P((DB_MPOOLFILE *, void *, u_int32_t));
840 int	memp_fset __P((DB_MPOOLFILE *, void *, u_int32_t));
841 int	memp_fsync __P((DB_MPOOLFILE *));
842 int	memp_open __P((const char *, u_int32_t, int, DB_ENV *, DB_MPOOL **));
843 int	memp_register __P((DB_MPOOL *, int,
844 	    int (*)(db_pgno_t, void *, DBT *),
845 	    int (*)(db_pgno_t, void *, DBT *)));
846 int	memp_stat __P((DB_MPOOL *,
847 	    DB_MPOOL_STAT **, DB_MPOOL_FSTAT ***, void *(*)(size_t)));
848 int	memp_sync __P((DB_MPOOL *, DB_LSN *));
849 int	memp_trickle __P((DB_MPOOL *, int, int *));
850 int	memp_unlink __P((const char *, int, DB_ENV *));
851 #if defined(__cplusplus)
852 }
853 #endif
854 
855 /*******************************************************
856  * Transactions.
857  *******************************************************/
858 #define	DB_TXNVERSION	1
859 #define	DB_TXNMAGIC	0x041593
860 
861 /* Operations values to the tx_recover() function. */
862 #define	DB_TXN_BACKWARD_ROLL	1	/* Read the log backwards. */
863 #define	DB_TXN_FORWARD_ROLL	2	/* Read the log forwards. */
864 #define	DB_TXN_OPENFILES	3	/* Read for open files. */
865 #define	DB_TXN_REDO		4	/* Redo the operation. */
866 #define	DB_TXN_UNDO		5	/* Undo the operation. */
867 
868 /* Internal transaction status values. */
869 
870 /* Transaction statistics structure. */
871 struct __db_txn_active {
872 	u_int32_t	txnid;		/* Transaction ID */
873 	DB_LSN		lsn;		/* Lsn of the begin record */
874 };
875 
876 struct __db_txn_stat {
877 	DB_LSN	  st_last_ckp;		/* lsn of the last checkpoint */
878 	DB_LSN	  st_pending_ckp;	/* last checkpoint did not finish */
879 	time_t	  st_time_ckp;		/* time of last checkpoint */
880 	u_int32_t st_last_txnid;	/* last transaction id given out */
881 	u_int32_t st_maxtxns;	/* maximum number of active txns */
882 	u_int32_t st_naborts;	/* number of aborted transactions */
883 	u_int32_t st_nbegins;	/* number of begun transactions */
884 	u_int32_t st_ncommits;	/* number of committed transactions */
885 	u_int32_t st_nactive;	/* number of active transactions */
886 	DB_TXN_ACTIVE
887 		 *st_txnarray;	/* array of active transactions */
888 	u_int32_t st_region_wait;	/* Region lock granted after wait. */
889 	u_int32_t st_region_nowait;	/* Region lock granted without wait. */
890 	u_int32_t st_refcnt;		/* Region reference count. */
891 	u_int32_t st_regsize;		/* Region size. */
892 };
893 
894 #if defined(__cplusplus)
895 extern "C" {
896 #endif
897 int	  txn_abort __P((DB_TXN *));
898 int	  txn_begin __P((DB_TXNMGR *, DB_TXN *, DB_TXN **));
899 int	  txn_checkpoint __P((const DB_TXNMGR *, u_int32_t, u_int32_t));
900 int	  txn_commit __P((DB_TXN *));
901 int	  txn_close __P((DB_TXNMGR *));
902 u_int32_t txn_id __P((DB_TXN *));
903 int	  txn_open __P((const char *, u_int32_t, int, DB_ENV *, DB_TXNMGR **));
904 int	  txn_prepare __P((DB_TXN *));
905 int	  txn_stat __P((DB_TXNMGR *, DB_TXN_STAT **, void *(*)(size_t)));
906 int	  txn_unlink __P((const char *, int, DB_ENV *));
907 #if defined(__cplusplus)
908 }
909 #endif
910 
911 #ifndef DB_DBM_HSEARCH
912 #define	DB_DBM_HSEARCH	0		/* No historic interfaces by default. */
913 #endif
914 #if DB_DBM_HSEARCH != 0
915 /*******************************************************
916  * Dbm/Ndbm historic interfaces.
917  *******************************************************/
918 #define	DBM_INSERT	0		/* Flags to dbm_store(). */
919 #define	DBM_REPLACE	1
920 
921 /*
922  * The db(3) support for ndbm(3) always appends this suffix to the
923  * file name to avoid overwriting the user's original database.
924  */
925 #define	DBM_SUFFIX	".db"
926 
927 #if defined(_XPG4_2)
928 typedef struct {
929 	char *dptr;
930 	size_t dsize;
931 } datum;
932 #else
933 typedef struct {
934 	char *dptr;
935 	int dsize;
936 } datum;
937 #endif
938 
939 /*
940  * Translate DBM calls into DB calls so that DB doesn't step on the
941  * application's name space.
942  *
943  * The global variables dbrdonly, dirf and pagf were not retained when
944  * 4BSD replaced the dbm interface with ndbm, and are not support here.
945  */
946 #define	dbminit(a)	__db_dbm_init(a)
947 #define	dbmclose	__db_dbm_close
948 #if !defined(__cplusplus)
949 #define	delete(a)	__db_dbm_delete(a)
950 #endif
951 #define	fetch(a)	__db_dbm_fetch(a)
952 #define	firstkey	__db_dbm_firstkey
953 #define	nextkey(a)	__db_dbm_nextkey(a)
954 #define	store(a, b)	__db_dbm_store(a, b)
955 
956 /* Prototype the DB calls. */
957 #if defined(__cplusplus)
958 extern "C" {
959 #endif
960 int	 __db_dbm_close __P((void));
961 int	 __db_dbm_dbrdonly __P((void));
962 int	 __db_dbm_delete __P((datum));
963 int	 __db_dbm_dirf __P((void));
964 datum	 __db_dbm_fetch __P((datum));
965 datum	 __db_dbm_firstkey __P((void));
966 int	 __db_dbm_init __P((char *));
967 datum	 __db_dbm_nextkey __P((datum));
968 int	 __db_dbm_pagf __P((void));
969 int	 __db_dbm_store __P((datum, datum));
970 #if defined(__cplusplus)
971 }
972 #endif
973 
974 /*
975  * Translate NDBM calls into DB calls so that DB doesn't step on the
976  * application's name space.
977  */
978 #define	dbm_clearerr(a)		__db_ndbm_clearerr(a)
979 #define	dbm_close(a)		__db_ndbm_close(a)
980 #define	dbm_delete(a, b)	__db_ndbm_delete(a, b)
981 #define	dbm_dirfno(a)		__db_ndbm_dirfno(a)
982 #define	dbm_error(a)		__db_ndbm_error(a)
983 #define	dbm_fetch(a, b)		__db_ndbm_fetch(a, b)
984 #define	dbm_firstkey(a)		__db_ndbm_firstkey(a)
985 #define	dbm_nextkey(a)		__db_ndbm_nextkey(a)
986 #define	dbm_open(a, b, c)	__db_ndbm_open(a, b, c)
987 #define	dbm_pagfno(a)		__db_ndbm_pagfno(a)
988 #define	dbm_rdonly(a)		__db_ndbm_rdonly(a)
989 #define	dbm_store(a, b, c, d)	__db_ndbm_store(a, b, c, d)
990 
991 /* Prototype the DB calls. */
992 #if defined(__cplusplus)
993 extern "C" {
994 #endif
995 int	 __db_ndbm_clearerr __P((DBM *));
996 void	 __db_ndbm_close __P((DBM *));
997 int	 __db_ndbm_delete __P((DBM *, datum));
998 int	 __db_ndbm_dirfno __P((DBM *));
999 int	 __db_ndbm_error __P((DBM *));
1000 datum	 __db_ndbm_fetch __P((DBM *, datum));
1001 datum	 __db_ndbm_firstkey __P((DBM *));
1002 datum	 __db_ndbm_nextkey __P((DBM *));
1003 DBM	*__db_ndbm_open __P((const char *, int, int));
1004 int	 __db_ndbm_pagfno __P((DBM *));
1005 int	 __db_ndbm_rdonly __P((DBM *));
1006 int	 __db_ndbm_store __P((DBM *, datum, datum, int));
1007 #if defined(__cplusplus)
1008 }
1009 #endif
1010 
1011 /*******************************************************
1012  * Hsearch historic interface.
1013  *******************************************************/
1014 typedef enum {
1015 	FIND, ENTER
1016 } ACTION;
1017 
1018 typedef struct entry {
1019 	char *key;
1020 	char *data;
1021 } ENTRY;
1022 
1023 /*
1024  * Translate HSEARCH calls into DB calls so that DB doesn't step on the
1025  * application's name space.
1026  */
1027 #define	hcreate(a)	__db_hcreate(a)
1028 #define	hdestroy	__db_hdestroy
1029 #define	hsearch(a, b)	__db_hsearch(a, b)
1030 
1031 /* Prototype the DB calls. */
1032 #if defined(__cplusplus)
1033 extern "C" {
1034 #endif
1035 int	 __db_hcreate __P((size_t));
1036 void	 __db_hdestroy __P((void));
1037 ENTRY	*__db_hsearch __P((ENTRY, ACTION));
1038 #if defined(__cplusplus)
1039 }
1040 #endif
1041 #endif /* DB_DBM_HSEARCH */
1042 
1043 /*
1044  * XXX
1045  * MacOS: Reset Metrowerks C enum sizes.
1046  */
1047 #ifdef __MWERKS__
1048 #pragma enumsalwaysint reset
1049 #endif
1050 #endif /* !_DB_H_ */
1051