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include/apr_sdbm.h

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00001 /* Copyright 2000-2005 The Apache Software Foundation or its licensors, as 00002 * applicable. 00003 * 00004 * Licensed under the Apache License, Version 2.0 (the "License"); 00005 * you may not use this file except in compliance with the License. 00006 * You may obtain a copy of the License at 00007 * 00008 * http://www.apache.org/licenses/LICENSE-2.0 00009 * 00010 * Unless required by applicable law or agreed to in writing, software 00011 * distributed under the License is distributed on an "AS IS" BASIS, 00012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00013 * See the License for the specific language governing permissions and 00014 * limitations under the License. 00015 */ 00016 00017 /* 00018 * sdbm - ndbm work-alike hashed database library 00019 * based on Per-Ake Larson's Dynamic Hashing algorithms. BIT 18 (1978). 00020 * author: oz@nexus.yorku.ca 00021 * status: ex-public domain 00022 */ 00023 00024 #ifndef APR_SDBM_H 00025 #define APR_SDBM_H 00026 00027 #include "apu.h" 00028 #include "apr_errno.h" 00029 #include "apr_file_io.h" /* for apr_fileperms_t */ 00030 00044 typedef struct apr_sdbm_t apr_sdbm_t; 00045 00049 typedef struct { 00051 char *dptr; 00053 int dsize; 00054 } apr_sdbm_datum_t; 00055 00056 /* The extensions used for the database files */ 00058 #define APR_SDBM_DIRFEXT ".dir" 00059 00060 #define APR_SDBM_PAGFEXT ".pag" 00061 00062 /* flags to sdbm_store */ 00063 #define APR_SDBM_INSERT 0 00064 #define APR_SDBM_REPLACE 1 00065 #define APR_SDBM_INSERTDUP 2 00085 APU_DECLARE(apr_status_t) apr_sdbm_open(apr_sdbm_t **db, const char *name, 00086 apr_int32_t mode, 00087 apr_fileperms_t perms, apr_pool_t *p); 00088 00093 APU_DECLARE(apr_status_t) apr_sdbm_close(apr_sdbm_t *db); 00094 00110 APU_DECLARE(apr_status_t) apr_sdbm_lock(apr_sdbm_t *db, int type); 00111 00116 APU_DECLARE(apr_status_t) apr_sdbm_unlock(apr_sdbm_t *db); 00117 00124 APU_DECLARE(apr_status_t) apr_sdbm_fetch(apr_sdbm_t *db, 00125 apr_sdbm_datum_t *value, 00126 apr_sdbm_datum_t key); 00127 00139 APU_DECLARE(apr_status_t) apr_sdbm_store(apr_sdbm_t *db, apr_sdbm_datum_t key, 00140 apr_sdbm_datum_t value, int opt); 00141 00148 APU_DECLARE(apr_status_t) apr_sdbm_delete(apr_sdbm_t *db, 00149 const apr_sdbm_datum_t key); 00150 00160 APU_DECLARE(apr_status_t) apr_sdbm_firstkey(apr_sdbm_t *db, apr_sdbm_datum_t *key); 00161 00167 APU_DECLARE(apr_status_t) apr_sdbm_nextkey(apr_sdbm_t *db, apr_sdbm_datum_t *key); 00168 00173 APU_DECLARE(int) apr_sdbm_rdonly(apr_sdbm_t *db); 00175 #endif /* APR_SDBM_H */

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