xref: /PHP-8.3/ext/dba/libcdb/cdb.h (revision 263b22f3)
1 /*
2    +----------------------------------------------------------------------+
3    | Copyright (c) The PHP Group                                          |
4    +----------------------------------------------------------------------+
5    | This source file is subject to version 3.01 of the PHP license,      |
6    | that is bundled with this package in the file LICENSE, and is        |
7    | available through the world-wide-web at the following url:           |
8    | https://www.php.net/license/3_01.txt                                 |
9    | If you did not receive a copy of the PHP license and are unable to   |
10    | obtain it through the world-wide-web, please send a note to          |
11    | license@php.net so we can mail you a copy immediately.               |
12    +----------------------------------------------------------------------+
13    | Author: Marcus Boerger <helly@php.net>                               |
14    +----------------------------------------------------------------------+
15  */
16 
17 /* incorporated from D.J.Bernstein's cdb-0.75 (http://cr.yp.to/cdb.html)*/
18 
19 #ifndef CDB_H
20 #define CDB_H
21 
22 #include "uint32.h"
23 
24 #define CDB_HASHSTART 5381
25 
26 struct cdb {
27 	php_stream *fp;
28 	uint32 loop; /* number of hash slots searched under this key */
29 	uint32 khash; /* initialized if loop is nonzero */
30 	uint32 kpos; /* initialized if loop is nonzero */
31 	uint32 hpos; /* initialized if loop is nonzero */
32 	uint32 hslots; /* initialized if loop is nonzero */
33 	uint32 dpos; /* initialized if cdb_findnext() returns 1 */
34 	uint32 dlen; /* initialized if cdb_findnext() returns 1 */
35 };
36 
37 uint32 cdb_hash(char *, unsigned int);
38 
39 void cdb_free(struct cdb *);
40 void cdb_init(struct cdb *, php_stream *fp);
41 
42 int cdb_read(struct cdb *, char *, unsigned int, uint32);
43 
44 void cdb_findstart(struct cdb *);
45 int cdb_findnext(struct cdb *, char *, unsigned int);
46 int cdb_find(struct cdb *, char *, unsigned int);
47 
48 #define cdb_datapos(c) ((c)->dpos)
49 #define cdb_datalen(c) ((c)->dlen)
50 
51 const char *cdb_version(void);
52 
53 #endif
54