/* _ _ ** _ __ ___ ___ __| | ___ ___| | mod_ssl ** | '_ ` _ \ / _ \ / _` | / __/ __| | Apache Interface to OpenSSL ** | | | | | | (_) | (_| | \__ \__ \ | www.modssl.org ** |_| |_| |_|\___/ \__,_|___|___/___/_| ftp.modssl.org ** |_____| ** ssl_util_sdbm.c ** Built-in Simple DBM (Header) */ /* ==================================================================== * Copyright (c) 1998-2005 Ralf S. Engelschall. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * 3. All advertising materials mentioning features or use of this * software must display the following acknowledgment: * "This product includes software developed by * Ralf S. Engelschall for use in the * mod_ssl project (http://www.modssl.org/)." * * 4. The names "mod_ssl" must not be used to endorse or promote * products derived from this software without prior written * permission. For written permission, please contact * rse@engelschall.com. * * 5. Products derived from this software may not be called "mod_ssl" * nor may "mod_ssl" appear in their names without prior * written permission of Ralf S. Engelschall. * * 6. Redistributions of any form whatsoever must retain the following * acknowledgment: * "This product includes software developed by * Ralf S. Engelschall for use in the * mod_ssl project (http://www.modssl.org/)." * * THIS SOFTWARE IS PROVIDED BY RALF S. ENGELSCHALL ``AS IS'' AND ANY * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL RALF S. ENGELSCHALL OR * HIS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * ==================================================================== */ /* * sdbm - ndbm work-alike hashed database library * based on Per-Ake Larson's Dynamic Hashing algorithms. BIT 18 (1978). * author: oz@nexus.yorku.ca * status: public domain. */ #ifndef SSL_UTIL_SDBM_H #define SSL_UTIL_SDBM_H #define DUFF /* go ahead and use the loop-unrolled version */ #include #ifdef MOD_SSL #define DBLKSIZ 16384 /* SSL cert chains require more */ #define PBLKSIZ 8192 /* SSL cert chains require more */ #define PAIRMAX 8008 /* arbitrary on PBLKSIZ-N */ #else #define DBLKSIZ 4096 #define PBLKSIZ 1024 #define PAIRMAX 1008 /* arbitrary on PBLKSIZ-N */ #endif #define SPLTMAX 10 /* maximum allowed splits */ /* for a single insertion */ #define DIRFEXT ".dir" #define PAGFEXT ".pag" typedef struct { int dirf; /* directory file descriptor */ int pagf; /* page file descriptor */ int flags; /* status/error flags, see below */ long maxbno; /* size of dirfile in bits */ long curbit; /* current bit number */ long hmask; /* current hash mask */ long blkptr; /* current block for nextkey */ int keyptr; /* current key for nextkey */ long blkno; /* current page to read/write */ long pagbno; /* current page in pagbuf */ char pagbuf[PBLKSIZ]; /* page file block buffer */ long dirbno; /* current block in dirbuf */ char dirbuf[DBLKSIZ]; /* directory file block buffer */ } DBM; #define DBM_RDONLY 0x1 /* data base open read-only */ #define DBM_IOERR 0x2 /* data base I/O error */ /* * utility macros */ #define sdbm_rdonly(db) ((db)->flags & DBM_RDONLY) #define sdbm_error(db) ((db)->flags & DBM_IOERR) #define sdbm_clearerr(db) ((db)->flags &= ~DBM_IOERR) /* ouch */ #define sdbm_dirfno(db) ((db)->dirf) #define sdbm_pagfno(db) ((db)->pagf) typedef struct { char *dptr; int dsize; } datum; extern datum nullitem; #ifdef __STDC__ #define proto(p) p #else #define proto(p) () #endif /* * flags to sdbm_store */ #define DBM_INSERT 0 #define DBM_REPLACE 1 /* * ndbm interface */ extern DBM *sdbm_open proto((char *, int, int)); extern void sdbm_close proto((DBM *)); extern datum sdbm_fetch proto((DBM *, datum)); extern int sdbm_delete proto((DBM *, datum)); extern int sdbm_store proto((DBM *, datum, datum, int)); extern datum sdbm_firstkey proto((DBM *)); extern datum sdbm_nextkey proto((DBM *)); /* * other */ extern DBM *sdbm_prep proto((char *, char *, int, int)); extern long sdbm_hash proto((char *, int)); /* pair.h */ extern int fitpair proto((char *, int)); extern void putpair proto((char *, datum, datum)); extern datum getpair proto((char *, datum)); extern int delpair proto((char *, datum)); extern int chkpage proto((char *)); extern datum getnkey proto((char *, int)); extern void splpage proto((char *, char *, long)); extern int duppair proto((char *, datum)); /* tune.h */ /* * sdbm - ndbm work-alike hashed database library * tuning and portability constructs [not nearly enough] * author: oz@nexus.yorku.ca */ #define BYTESIZ 8 /* * important tuning parms (hah) */ #define SEEDUPS /* always detect duplicates */ #define BADMESS /* generate a message for worst case: cannot make room after SPLTMAX splits */ /* * misc */ #ifdef DEBUG #define debug(x) printf x #else #define debug(x) #endif #endif /* SSL_UTIL_SDBM_H */