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Diffstat (limited to 'dbm/apr_dbm_sdbm.c')
| -rw-r--r-- | dbm/apr_dbm_sdbm.c | 223 |
1 files changed, 223 insertions, 0 deletions
diff --git a/dbm/apr_dbm_sdbm.c b/dbm/apr_dbm_sdbm.c new file mode 100644 index 0000000..e6cc4aa --- /dev/null +++ b/dbm/apr_dbm_sdbm.c @@ -0,0 +1,223 @@ +/* Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You 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_config.h" +#include "apu.h" + +#if APU_HAVE_SDBM + +#include "apr_dbm_private.h" +#include "apr_sdbm.h" + +#define APR_DBM_DBMODE_RO (APR_FOPEN_READ | APR_FOPEN_BUFFERED) +#define APR_DBM_DBMODE_RW (APR_FOPEN_READ | APR_FOPEN_WRITE) +#define APR_DBM_DBMODE_RWCREATE (APR_FOPEN_READ | APR_FOPEN_WRITE | APR_FOPEN_CREATE) +#define APR_DBM_DBMODE_RWTRUNC (APR_FOPEN_READ | APR_FOPEN_WRITE | APR_FOPEN_CREATE | \ + APR_FOPEN_TRUNCATE) + +static apr_status_t set_error(apr_dbm_t *dbm, apr_status_t dbm_said) +{ + dbm->errcode = dbm_said; + + if (dbm_said != APR_SUCCESS) { + dbm->errmsg = apr_psprintf(dbm->pool, "%pm", &dbm_said); + } else { + dbm->errmsg = NULL; + } + + return dbm_said; +} + +/* -------------------------------------------------------------------------- +** +** 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) +{ + apr_sdbm_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; + (*pdb)->file = file; + + /* ### register a cleanup to close the DBM? */ + + return APR_SUCCESS; +} + +static void vt_sdbm_close(apr_dbm_t *dbm) +{ + apr_sdbm_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; + apr_sdbm_datum_t kd, rd; + + kd.dptr = key.dptr; + kd.dsize = (int)key.dsize; + + rv = apr_sdbm_fetch(dbm->file, &rd, kd); + + pvalue->dptr = rd.dptr; + pvalue->dsize = rd.dsize; + + /* 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; + apr_sdbm_datum_t kd, vd; + + kd.dptr = key.dptr; + kd.dsize = (int)key.dsize; + + vd.dptr = value.dptr; + vd.dsize = (int)value.dsize; + + rv = apr_sdbm_store(dbm->file, kd, vd, APR_SDBM_REPLACE); + + /* 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; + apr_sdbm_datum_t kd; + + kd.dptr = key.dptr; + kd.dsize = (int)key.dsize; + + rv = apr_sdbm_delete(dbm->file, kd); + + /* 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 vd, kd; + + kd.dptr = key.dptr; + kd.dsize = (int)key.dsize; + + if (apr_sdbm_fetch(dbm->file, &vd, kd) != APR_SUCCESS) + exists = 0; + else + exists = vd.dptr != NULL; + + return exists; +} + +static apr_status_t vt_sdbm_firstkey(apr_dbm_t *dbm, apr_datum_t *pkey) +{ + apr_status_t rv; + apr_sdbm_datum_t rd; + + rv = apr_sdbm_firstkey(dbm->file, &rd); + + pkey->dptr = rd.dptr; + pkey->dsize = rd.dsize; + + /* 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_sdbm_datum_t rd; + + (void)apr_sdbm_nextkey(dbm->file, &rd); + + pkey->dptr = rd.dptr; + pkey->dsize = rd.dsize; + + /* 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) +{ +} + +static void vt_sdbm_usednames(apr_pool_t *pool, const char *pathname, + const char **used1, const char **used2) +{ + *used1 = apr_pstrcat(pool, pathname, APR_SDBM_DIRFEXT, NULL); + *used2 = apr_pstrcat(pool, pathname, APR_SDBM_PAGFEXT, NULL); +} + +APU_MODULE_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 */ |