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- /* Copyright 2000-2005 The Apache Software Foundation or its licensors, as
- * applicable.
- *
- * 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.
- */
-
- /* Overview of what this is and does:
- * http://www.apache.org/~niq/dbd.html
- */
-
- #ifndef APR_DBD_H
- #define APR_DBD_H
-
- #ifdef __cplusplus
- extern "C" {
- #endif
-
- /**
- * @file apr_dbd.h
- * @brief APR-UTIL DBD library
- */
- /**
- * @defgroup APR_Util_DBD DBD routines
- * @ingroup APR_Util
- * @{
- */
-
- /* These are opaque structs. Instantiation is up to each backend */
- typedef struct apr_dbd_driver_t apr_dbd_driver_t;
- typedef struct apr_dbd_t apr_dbd_t;
- typedef struct apr_dbd_transaction_t apr_dbd_transaction_t;
- typedef struct apr_dbd_results_t apr_dbd_results_t;
- typedef struct apr_dbd_row_t apr_dbd_row_t;
- typedef struct apr_dbd_prepared_t apr_dbd_prepared_t;
-
- /** apr_dbd_init: perform once-only initialisation. Call once only.
- *
- * @param pool - pool to register any shutdown cleanups, etc
- */
- APU_DECLARE(apr_status_t) apr_dbd_init(apr_pool_t *pool);
-
- /** apr_dbd_get_driver: get the driver struct for a name
- *
- * @param pool - (process) pool to register cleanup
- * @param name - driver name
- * @param driver - pointer to driver struct.
- * @return APR_SUCCESS for success
- * @return APR_ENOTIMPL for no driver (when DSO not enabled)
- * @return APR_EDSOOPEN if DSO driver file can't be opened
- * @return APR_ESYMNOTFOUND if the driver file doesn't contain a driver
- */
- APU_DECLARE(apr_status_t) apr_dbd_get_driver(apr_pool_t *pool, const char *name,
- const apr_dbd_driver_t **driver);
-
- /** apr_dbd_open: open a connection to a backend
- *
- * @param ptmp - working pool
- * @param params - arguments to driver (implementation-dependent)
- * @param handle - pointer to handle to return
- * @param driver - driver struct.
- * @return APR_SUCCESS for success
- * @return APR_EGENERAL if driver exists but connection failed
- */
- APU_DECLARE(apr_status_t) apr_dbd_open(const apr_dbd_driver_t *driver,
- apr_pool_t *ptmp, const char *params,
- apr_dbd_t **handle);
-
- /** apr_dbd_close: close a connection to a backend.
- * Only required for explicit close or
- *
- * @param handle - handle to close
- * @param driver - driver struct.
- * @return APR_SUCCESS for success or error status
- */
- APU_DECLARE(apr_status_t) apr_dbd_close(const apr_dbd_driver_t *driver,
- apr_dbd_t *handle);
-
- /* apr-function-shaped versions of things */
-
- /** apr_dbd_name: get the name of the driver
- *
- * @param driver - the driver
- * @return - name
- */
- APU_DECLARE(const char*) apr_dbd_name(const apr_dbd_driver_t *driver);
-
- /** apr_dbd_native_handle: get native database handle of the underlying db
- *
- * @param driver - the driver
- * @param handle - apr_dbd handle
- * @return - native handle
- */
- APU_DECLARE(void*) apr_dbd_native_handle(const apr_dbd_driver_t *driver,
- apr_dbd_t *handle);
-
- /** check_conn: check status of a database connection
- *
- * @param driver - the driver
- * @param pool - working pool
- * @param handle - the connection to check
- * @return APR_SUCCESS or error
- */
- APU_DECLARE(int) apr_dbd_check_conn(const apr_dbd_driver_t *driver, apr_pool_t *pool,
- apr_dbd_t *handle);
-
- /** apr_dbd_set_dbname: select database name. May be a no-op if not supported.
- *
- * @param driver - the driver
- * @param pool - working pool
- * @param handle - the connection
- * @param name - the database to select
- * @return 0 for success or error code
- */
- APU_DECLARE(int) apr_dbd_set_dbname(const apr_dbd_driver_t *driver, apr_pool_t *pool,
- apr_dbd_t *handle, const char *name);
-
- /** apr_dbd_transaction_start: start a transaction. May be a no-op.
- *
- * @param driver - the driver
- * @param pool - a pool to use for error messages (if any).
- * @param handle - the db connection
- * @param transaction - ptr to a transaction. May be null on entry
- * @return 0 for success or error code
- */
- APU_DECLARE(int) apr_dbd_transaction_start(const apr_dbd_driver_t *driver,
- apr_pool_t *pool,
- apr_dbd_t *handle,
- apr_dbd_transaction_t **trans);
-
- /** apr_dbd_transaction_end: end a transaction
- * (commit on success, rollback on error).
- * May be a no-op.
- *
- * @param driver - the driver
- * @param handle - the db connection
- * @param transaction - the transaction.
- * @return 0 for success or error code
- */
- APU_DECLARE(int) apr_dbd_transaction_end(const apr_dbd_driver_t *driver,
- apr_pool_t *pool,
- apr_dbd_transaction_t *trans);
-
- /** apr_dbd_query: execute an SQL query that doesn't return a result set
- *
- * @param driver - the driver
- * @param handle - the connection
- * @param nrows - number of rows affected.
- * @param statement - the SQL statement to execute
- * @return 0 for success or error code
- */
- APU_DECLARE(int) apr_dbd_query(const apr_dbd_driver_t *driver, apr_dbd_t *handle,
- int *nrows, const char *statement);
-
- /** apr_dbd_select: execute an SQL query that returns a result set
- *
- * @param driver - the driver
- * @param pool - pool to allocate the result set
- * @param handle - the connection
- * @param res - pointer to result set pointer. May point to NULL on entry
- * @param statement - the SQL statement to execute
- * @param random - 1 to support random access to results (seek any row);
- * 0 to support only looping through results in order
- * (async access - faster)
- * @return 0 for success or error code
- */
- APU_DECLARE(int) apr_dbd_select(const apr_dbd_driver_t *driver, apr_pool_t *pool,
- apr_dbd_t *handle, apr_dbd_results_t **res,
- const char *statement, int random);
-
- /** apr_dbd_num_cols: get the number of columns in a results set
- *
- * @param driver - the driver
- * @param res - result set.
- * @return number of columns
- */
- APU_DECLARE(int) apr_dbd_num_cols(const apr_dbd_driver_t *driver,
- apr_dbd_results_t *res);
-
- /** apr_dbd_num_tuples: get the number of rows in a results set
- * of a synchronous select
- *
- * @param driver - the driver
- * @param res - result set.
- * @return number of rows, or -1 if the results are asynchronous
- */
- APU_DECLARE(int) apr_dbd_num_tuples(const apr_dbd_driver_t *driver,
- apr_dbd_results_t *res);
-
- /** apr_dbd_get_row: get a row from a result set
- *
- * @param driver - the driver
- * @param pool - pool to allocate the row
- * @param res - result set pointer
- * @param row - pointer to row pointer. May point to NULL on entry
- * @param rownum - row number, or -1 for "next row". Ignored if random
- * access is not supported.
- * @return 0 for success, -1 for rownum out of range or data finished
- */
- APU_DECLARE(int) apr_dbd_get_row(const apr_dbd_driver_t *driver, apr_pool_t *pool,
- apr_dbd_results_t *res, apr_dbd_row_t **row,
- int rownum);
-
- /** apr_dbd_get_entry: get an entry from a row
- *
- * @param driver - the driver
- * @param row - row pointer
- * @param col - entry number
- * @return value from the row, or NULL if col is out of bounds.
- */
- APU_DECLARE(const char*) apr_dbd_get_entry(const apr_dbd_driver_t *driver,
- apr_dbd_row_t *row, int col);
-
- /** apr_dbd_error: get current error message (if any)
- *
- * @param driver - the driver
- * @param handle - the connection
- * @param errnum - error code from operation that returned an error
- * @return the database current error message, or message for errnum
- * (implementation-dependent whether errnum is ignored)
- */
- APU_DECLARE(const char*) apr_dbd_error(const apr_dbd_driver_t *driver,
- apr_dbd_t *handle, int errnum);
-
- /** apr_dbd_escape: escape a string so it is safe for use in query/select
- *
- * @param driver - the driver
- * @param pool - pool to alloc the result from
- * @param string - the string to escape
- * @param handle - the connection
- * @return the escaped, safe string
- */
- APU_DECLARE(const char*) apr_dbd_escape(const apr_dbd_driver_t *driver,
- apr_pool_t *pool, const char *string,
- apr_dbd_t *handle);
-
- /** apr_dbd_prepare: prepare a statement
- *
- * @param driver - the driver
- * @param pool - pool to alloc the result from
- * @param handle - the connection
- * @param query - the SQL query
- * @param label - A label for the prepared statement.
- * use NULL for temporary prepared statements
- * (eg within a Request in httpd)
- * @param statement - statement to prepare. May point to null on entry.
- * @return 0 for success or error code
- */
- APU_DECLARE(int) apr_dbd_prepare(const apr_dbd_driver_t *driver, apr_pool_t *pool,
- apr_dbd_t *handle, const char *query,
- const char *label,
- apr_dbd_prepared_t **statement);
-
-
- /** apr_dbd_pquery: query using a prepared statement + args
- *
- * @param driver - the driver
- * @param pool - working pool
- * @param handle - the connection
- * @param nrows - number of rows affected.
- * @param statement - the prepared statement to execute
- * @param nargs - number of args to prepared statement
- * @param args - args to prepared statement
- * @return 0 for success or error code
- */
- APU_DECLARE(int) apr_dbd_pquery(const apr_dbd_driver_t *driver, apr_pool_t *pool,
- apr_dbd_t *handle, int *nrows,
- apr_dbd_prepared_t *statement, int nargs,
- const char **args);
-
- /** apr_dbd_pselect: select using a prepared statement + args
- *
- * @param driver - the driver
- * @param pool - working pool
- * @param handle - the connection
- * @param res - pointer to query results. May point to NULL on entry
- * @param statement - the prepared statement to execute
- * @param random - Whether to support random-access to results
- * @param nargs - number of args to prepared statement
- * @param args - args to prepared statement
- * @return 0 for success or error code
- */
- APU_DECLARE(int) apr_dbd_pselect(const apr_dbd_driver_t *driver, apr_pool_t *pool,
- apr_dbd_t *handle, apr_dbd_results_t **res,
- apr_dbd_prepared_t *statement, int random,
- int nargs, const char **args);
-
- /** apr_dbd_pvquery: query using a prepared statement + args
- *
- * @param driver - the driver
- * @param pool - working pool
- * @param handle - the connection
- * @param nrows - number of rows affected.
- * @param statement - the prepared statement to execute
- * @param ... - varargs list
- * @return 0 for success or error code
- */
- APU_DECLARE(int) apr_dbd_pvquery(const apr_dbd_driver_t *driver, apr_pool_t *pool,
- apr_dbd_t *handle, int *nrows,
- apr_dbd_prepared_t *statement, ...);
-
- /** apr_dbd_pvselect: select using a prepared statement + args
- *
- * @param driver - the driver
- * @param pool - working pool
- * @param handle - the connection
- * @param res - pointer to query results. May point to NULL on entry
- * @param statement - the prepared statement to execute
- * @param random - Whether to support random-access to results
- * @param ... - varargs list
- * @return 0 for success or error code
- */
- APU_DECLARE(int) apr_dbd_pvselect(const apr_dbd_driver_t *driver, apr_pool_t *pool,
- apr_dbd_t *handle, apr_dbd_results_t **res,
- apr_dbd_prepared_t *statement, int random,
- ...);
-
- /** @} */
-
- #ifdef __cplusplus
- }
- #endif
-
- #endif
-