xref: /PHP-7.2/ext/dba/libcdb/cdb.h (revision 7a7ec01a)
1 /*
2    +----------------------------------------------------------------------+
3    | PHP Version 7                                                        |
4    +----------------------------------------------------------------------+
5    | Copyright (c) 1997-2018 The PHP Group                                |
6    +----------------------------------------------------------------------+
7    | This source file is subject to version 3.01 of the PHP license,      |
8    | that is bundled with this package in the file LICENSE, and is        |
9    | available through the world-wide-web at the following url:           |
10    | http://www.php.net/license/3_01.txt                                  |
11    | If you did not receive a copy of the PHP license and are unable to   |
12    | obtain it through the world-wide-web, please send a note to          |
13    | license@php.net so we can mail you a copy immediately.               |
14    +----------------------------------------------------------------------+
15    | Author: Marcus Boerger <helly@php.net>                               |
16    +----------------------------------------------------------------------+
17  */
18 
19 /* $Id$ */
20 
21 /* incorporated from D.J.Bernstein's cdb-0.75 (http://cr.yp.to/cdb.html)*/
22 
23 #ifndef CDB_H
24 #define CDB_H
25 
26 #include "uint32.h"
27 
28 #define CDB_HASHSTART 5381
29 
30 struct cdb {
31 	php_stream *fp;
32 	uint32 loop; /* number of hash slots searched under this key */
33 	uint32 khash; /* initialized if loop is nonzero */
34 	uint32 kpos; /* initialized if loop is nonzero */
35 	uint32 hpos; /* initialized if loop is nonzero */
36 	uint32 hslots; /* initialized if loop is nonzero */
37 	uint32 dpos; /* initialized if cdb_findnext() returns 1 */
38 	uint32 dlen; /* initialized if cdb_findnext() returns 1 */
39 };
40 
41 uint32 cdb_hash(char *, unsigned int);
42 
43 void cdb_free(struct cdb *);
44 void cdb_init(struct cdb *, php_stream *fp);
45 
46 int cdb_read(struct cdb *, char *, unsigned int, uint32);
47 
48 void cdb_findstart(struct cdb *);
49 int cdb_findnext(struct cdb *, char *, unsigned int);
50 int cdb_find(struct cdb *, char *, unsigned int);
51 
52 #define cdb_datapos(c) ((c)->dpos)
53 #define cdb_datalen(c) ((c)->dlen)
54 
55 char *cdb_version();
56 
57 #endif
58