ssl_util_sdbm.h
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上传日期:2009-04-13
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文件大小:7k
- /* _ _
- ** _ __ ___ ___ __| | ___ ___| | mod_ssl
- ** | '_ ` _ / _ / _` | / __/ __| | Apache Interface to OpenSSL
- ** | | | | | | (_) | (_| | __ __ | www.modssl.org
- ** |_| |_| |_|___/ __,_|___|___/___/_| ftp.modssl.org
- ** |_____|
- ** ssl_util_sdbm.c
- ** Built-in Simple DBM (Header)
- */
- /* ====================================================================
- * Copyright (c) 1998-2006 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 <rse@engelschall.com> 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 <rse@engelschall.com> 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 <stdio.h>
- #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 */