| /* Copyright 2000-2004 The Apache Software Foundation |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include "apr_strings.h" |
| #define APR_WANT_MEMFUNC |
| #define APR_WANT_STRFUNC |
| #include "apr_want.h" |
| |
| #include "apu.h" |
| |
| #if APU_HAVE_SDBM |
| |
| #include "apr_dbm_private.h" |
| |
| #include "apr_sdbm.h" |
| #if APR_HAVE_STDLIB_H |
| #include <stdlib.h> /* For abort() */ |
| #endif |
| |
| /* this is used in a few places to define a noop "function". it is needed |
| to stop "no effect" warnings from GCC. */ |
| #define NOOP_FUNCTION if (0) ; else |
| |
| /* ### define defaults for now; these will go away in a while */ |
| #define REGISTER_CLEANUP(dbm, pdatum) NOOP_FUNCTION |
| #define SET_FILE(pdb, f) ((pdb)->file = (f)) |
| |
| typedef apr_sdbm_t *real_file_t; |
| |
| typedef apr_sdbm_datum_t cvt_datum_t; |
| #define CONVERT_DATUM(cvt, pinput) ((cvt).dptr = (pinput)->dptr, (cvt).dsize = (pinput)->dsize) |
| |
| typedef apr_sdbm_datum_t result_datum_t; |
| #define RETURN_DATUM(poutput, rd) ((poutput)->dptr = (rd).dptr, (poutput)->dsize = (rd).dsize) |
| |
| #define APR_DBM_CLOSE(f) apr_sdbm_close(f) |
| #define APR_DBM_FETCH(f, k, v) apr_sdbm_fetch(f, &(v), (k)) |
| #define APR_DBM_STORE(f, k, v) apr_sdbm_store(f, (k), (v), APR_SDBM_REPLACE) |
| #define APR_DBM_DELETE(f, k) apr_sdbm_delete(f, (k)) |
| #define APR_DBM_FIRSTKEY(f, k) apr_sdbm_firstkey(f, &(k)) |
| #define APR_DBM_NEXTKEY(f, k, nk) apr_sdbm_nextkey(f, &(nk)) |
| #define APR_DBM_FREEDPTR(dptr) NOOP_FUNCTION |
| |
| #define APR_DBM_DBMODE_RO APR_READ |
| #define APR_DBM_DBMODE_RW (APR_READ | APR_WRITE) |
| #define APR_DBM_DBMODE_RWCREATE (APR_READ | APR_WRITE | APR_CREATE) |
| #define APR_DBM_DBMODE_RWTRUNC (APR_READ | APR_WRITE | APR_CREATE | \ |
| APR_TRUNCATE) |
| |
| static apr_status_t set_error(apr_dbm_t *dbm, apr_status_t dbm_said) |
| { |
| apr_status_t rv = APR_SUCCESS; |
| |
| /* ### ignore whatever the DBM said (dbm_said); ask it explicitly */ |
| |
| if ((dbm->errcode = dbm_said) == APR_SUCCESS) { |
| dbm->errmsg = NULL; |
| } |
| else { |
| dbm->errmsg = "I/O error occurred."; |
| rv = APR_EGENERAL; /* ### need something better */ |
| } |
| |
| return rv; |
| } |
| |
| /* -------------------------------------------------------------------------- |
| ** |
| ** DEFINE THE VTABLE FUNCTIONS FOR SDBM |
| */ |
| |
| static apr_status_t vt_sdbm_open(apr_dbm_t **pdb, const char *pathname, |
| apr_int32_t mode, apr_fileperms_t perm, |
| apr_pool_t *pool) |
| { |
| real_file_t file; |
| int dbmode; |
| |
| *pdb = NULL; |
| |
| switch (mode) { |
| case APR_DBM_READONLY: |
| dbmode = APR_DBM_DBMODE_RO; |
| break; |
| case APR_DBM_READWRITE: |
| dbmode = APR_DBM_DBMODE_RW; |
| break; |
| case APR_DBM_RWCREATE: |
| dbmode = APR_DBM_DBMODE_RWCREATE; |
| break; |
| case APR_DBM_RWTRUNC: |
| dbmode = APR_DBM_DBMODE_RWTRUNC; |
| break; |
| default: |
| return APR_EINVAL; |
| } |
| |
| { |
| apr_status_t rv; |
| |
| rv = apr_sdbm_open(&file, pathname, dbmode, perm, pool); |
| if (rv != APR_SUCCESS) |
| return rv; |
| } |
| |
| /* we have an open database... return it */ |
| *pdb = apr_pcalloc(pool, sizeof(**pdb)); |
| (*pdb)->pool = pool; |
| (*pdb)->type = &apr_dbm_type_sdbm; |
| SET_FILE(*pdb, file); |
| |
| /* ### register a cleanup to close the DBM? */ |
| |
| return APR_SUCCESS; |
| } |
| |
| static void vt_sdbm_close(apr_dbm_t *dbm) |
| { |
| APR_DBM_CLOSE(dbm->file); |
| } |
| |
| static apr_status_t vt_sdbm_fetch(apr_dbm_t *dbm, apr_datum_t key, |
| apr_datum_t * pvalue) |
| { |
| apr_status_t rv; |
| cvt_datum_t ckey; |
| result_datum_t rd; |
| |
| CONVERT_DATUM(ckey, &key); |
| rv = APR_DBM_FETCH(dbm->file, ckey, rd); |
| RETURN_DATUM(pvalue, rd); |
| |
| REGISTER_CLEANUP(dbm, pvalue); |
| |
| /* store the error info into DBM, and return a status code. Also, note |
| that *pvalue should have been cleared on error. */ |
| return set_error(dbm, rv); |
| } |
| |
| static apr_status_t vt_sdbm_store(apr_dbm_t *dbm, apr_datum_t key, |
| apr_datum_t value) |
| { |
| apr_status_t rv; |
| cvt_datum_t ckey; |
| cvt_datum_t cvalue; |
| |
| CONVERT_DATUM(ckey, &key); |
| CONVERT_DATUM(cvalue, &value); |
| rv = APR_DBM_STORE(dbm->file, ckey, cvalue); |
| |
| /* store any error info into DBM, and return a status code. */ |
| return set_error(dbm, rv); |
| } |
| |
| static apr_status_t vt_sdbm_del(apr_dbm_t *dbm, apr_datum_t key) |
| { |
| apr_status_t rv; |
| cvt_datum_t ckey; |
| |
| CONVERT_DATUM(ckey, &key); |
| rv = APR_DBM_DELETE(dbm->file, ckey); |
| |
| /* store any error info into DBM, and return a status code. */ |
| return set_error(dbm, rv); |
| } |
| |
| static int vt_sdbm_exists(apr_dbm_t *dbm, apr_datum_t key) |
| { |
| int exists; |
| apr_sdbm_datum_t ckey; |
| |
| CONVERT_DATUM(ckey, &key); |
| |
| { |
| apr_sdbm_datum_t value; |
| if (apr_sdbm_fetch(dbm->file, &value, ckey) != APR_SUCCESS) { |
| exists = 0; |
| } |
| else |
| exists = value.dptr != NULL; |
| } |
| |
| return exists; |
| } |
| |
| static apr_status_t vt_sdbm_firstkey(apr_dbm_t *dbm, apr_datum_t * pkey) |
| { |
| apr_status_t rv; |
| result_datum_t rd; |
| |
| rv = APR_DBM_FIRSTKEY(dbm->file, rd); |
| RETURN_DATUM(pkey, rd); |
| |
| REGISTER_CLEANUP(dbm, pkey); |
| |
| /* store any error info into DBM, and return a status code. */ |
| return set_error(dbm, rv); |
| } |
| |
| static apr_status_t vt_sdbm_nextkey(apr_dbm_t *dbm, apr_datum_t * pkey) |
| { |
| apr_status_t rv; |
| cvt_datum_t ckey; |
| result_datum_t rd; |
| |
| CONVERT_DATUM(ckey, pkey); |
| rv = APR_DBM_NEXTKEY(dbm->file, ckey, rd); |
| RETURN_DATUM(pkey, rd); |
| |
| REGISTER_CLEANUP(dbm, pkey); |
| |
| /* store any error info into DBM, and return a status code. */ |
| return set_error(dbm, APR_SUCCESS); |
| } |
| |
| static void vt_sdbm_freedatum(apr_dbm_t *dbm, apr_datum_t data) |
| { |
| APR_DBM_FREEDPTR(data.dptr); |
| } |
| |
| static void vt_sdbm_usednames(apr_pool_t *pool, const char *pathname, |
| const char **used1, const char **used2) |
| { |
| char *work; |
| |
| /* ### this could be optimized by computing strlen() once and using |
| ### memcpy and pmemdup instead. but why bother? */ |
| |
| *used1 = apr_pstrcat(pool, pathname, APR_SDBM_DIRFEXT, NULL); |
| *used2 = work = apr_pstrdup(pool, *used1); |
| |
| /* we know the extension is 4 characters */ |
| memcpy(&work[strlen(work) - 4], APR_SDBM_PAGFEXT, 4); |
| } |
| |
| |
| APU_DECLARE_DATA const apr_dbm_type_t apr_dbm_type_sdbm = { |
| "sdbm", |
| |
| vt_sdbm_open, |
| vt_sdbm_close, |
| vt_sdbm_fetch, |
| vt_sdbm_store, |
| vt_sdbm_del, |
| vt_sdbm_exists, |
| vt_sdbm_firstkey, |
| vt_sdbm_nextkey, |
| vt_sdbm_freedatum, |
| vt_sdbm_usednames |
| }; |
| |
| #endif /* APU_HAVE_SDBM */ |