--- /dev/null
+/*****************************************************************************
+ * sqlite.c: An SQLite3 wrapper for VLC
+ *****************************************************************************
+ * Copyright (C) 2008-2009 the VideoLAN team
+ * $Id$
+ *
+ * Authors: Antoine Lejeune <phytos@videolan.org>
+ * Jean-Philippe André <jpeg@videolan.org>
+ * Rémi Duraffort <ivoire@videolan.org>
+ * Adrien Maglo <magsoft@videolan.org>
+ * Srikanth Raju <srikiraju@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <vlc_common.h>
+#include <vlc/vlc.h>
+#include <vlc_sql.h>
+#include <vlc_plugin.h>
+
+#include <sqlite3.h>
+#include <assert.h>
+
+
+/*****************************************************************************
+ * Private structures
+ *****************************************************************************/
+struct sql_sys_t
+{
+ sqlite3 *db; /**< Database connection. */
+ vlc_mutex_t lock; /**< SQLite mutex. Threads are evil here. */
+ vlc_mutex_t trans_lock; /**< Mutex for running transactions */
+};
+
+struct sql_stmt_t
+{
+ sqlite3_stmt* p_sqlitestmt;
+};
+
+
+/*****************************************************************************
+ * Headers
+ *****************************************************************************/
+static int load ( vlc_object_t * );
+static void unload ( vlc_object_t * );
+
+static int OpenDatabase( sql_t * );
+static int CloseDatabase (sql_t * );
+static int QueryCallback( sql_t * p_sql,
+ const char * query,
+ sql_query_callback_t callback,
+ void *arg ); // 1st argument to callback
+static int Query( sql_t * p_sql,
+ const char * query,
+ char *** result,
+ int * nrow,
+ int * ncol );
+static int GetTables( sql_t * p_sql,
+ char *** result );
+static void FreeResult( sql_t * p_sql,
+ char **pp_result );
+static char* VMSprintf( const char* psz_fmt,
+ va_list args );
+static int BeginTransaction( sql_t* p_sql );
+static int CommitTransaction( sql_t* p_sql );
+static void RollbackTransaction( sql_t* p_sql );
+static sql_stmt_t* PrepareStatement( sql_t* p_sql,
+ const char* psz_fmt,
+ int i_length );
+static int BindValues( sql_t* p_sql,
+ sql_stmt_t* p_stmt,
+ int i_pos,
+ unsigned int i_type,
+ const sql_value_t* p_value );
+static int StatementStep( sql_t* p_sql,
+ sql_stmt_t* p_stmt );
+static int StatementReset( sql_t* p_sql,
+ sql_stmt_t* p_stmt );
+static int StatementFinalize( sql_t* p_sql,
+ sql_stmt_t* p_stmt );
+static int GetColumnFromStatement( sql_t* p_sql,
+ sql_stmt_t* p_stmt,
+ int i_col,
+ int type,
+ sql_value_t *p_res );
+static int GetColumnTypeFromStatement( sql_t* p_sql,
+ sql_stmt_t* p_stmt,
+ int i_col,
+ int* pi_type );
+
+/*****************************************************************************
+ * Module description
+ *****************************************************************************/
+vlc_module_begin()
+ set_shortname( "SQLite" )
+ set_description( _("SQLite database module") )
+ set_capability( "sql", 1 )
+ set_callbacks( load, unload )
+ set_category( CAT_ADVANCED )
+vlc_module_end()
+
+
+/**
+ * @brief Load module
+ * @param obj Parent object
+ * @return VLC_SUCCESS or VLC_ENOMEM
+ */
+static int load( vlc_object_t *p_this )
+{
+ sql_t *p_sql = (sql_t *) p_this;
+
+ /* Initialize sys_t */
+ p_sql->p_sys = calloc( 1, sizeof( *p_sql->p_sys ) );
+ if( !p_sql->p_sys )
+ return VLC_ENOMEM;
+
+ vlc_mutex_init( &p_sql->p_sys->lock );
+ vlc_mutex_init( &p_sql->p_sys->trans_lock );
+
+ /* Open Database */
+ if( OpenDatabase( p_sql ) == VLC_SUCCESS )
+ msg_Dbg( p_sql, "sqlite module loaded" );
+ else
+ {
+ free( p_sql->p_sys );
+ vlc_mutex_destroy( &p_sql->p_sys->lock );
+ vlc_mutex_destroy( &p_sql->p_sys->trans_lock );
+ return VLC_EGENERIC;
+ }
+
+ p_sql->pf_query_callback = QueryCallback;
+ p_sql->pf_get_tables = GetTables;
+ p_sql->pf_query = Query;
+ p_sql->pf_free = FreeResult;
+ p_sql->pf_vmprintf = VMSprintf;
+ p_sql->pf_begin = BeginTransaction;
+ p_sql->pf_commit = CommitTransaction;
+ p_sql->pf_rollback = RollbackTransaction;
+ p_sql->pf_prepare = PrepareStatement;
+ p_sql->pf_bind = BindValues;
+ p_sql->pf_run = StatementStep;
+ p_sql->pf_reset = StatementReset;
+ p_sql->pf_finalize = StatementFinalize;
+ p_sql->pf_gettype = GetColumnTypeFromStatement;
+ p_sql->pf_getcolumn = GetColumnFromStatement;
+
+ return VLC_SUCCESS;
+}
+
+/**
+ * @brief Unload module
+ * @param obj This sql_t object
+ * @return Nothing
+ */
+static void unload( vlc_object_t *p_this )
+{
+ sql_t *p_sql = (sql_t *)p_this;
+
+ CloseDatabase( p_sql );
+ vlc_mutex_destroy( &p_sql->p_sys->lock );
+ vlc_mutex_destroy( &p_sql->p_sys->trans_lock );
+ free( p_sql->p_sys );
+}
+
+/**
+ * @brief Sqlite Busy handler
+ * @param p_data sql_t object
+ * @param i_times Number of times busy handler has been invoked
+ */
+static int vlc_sqlite_busy_handler( void* p_data, int i_times )
+{
+ if( i_times >= 10 )
+ {
+ msg_Warn( (sql_t*) p_data, "Wait limit exceeded in SQLITE_BUSY handler" );
+ return 0;
+ }
+ msleep( 2000000 );
+ return 1;
+}
+
+/**
+ * @brief Open current database
+ * @param p_sql This sql_t object
+ * @return VLC_SUCCESS or VLC_EGENERIC
+ * @note p_sql->psz_host is required
+ */
+static int OpenDatabase( sql_t *p_sql )
+{
+ assert( p_sql->psz_host && *p_sql->psz_host );
+
+ if( sqlite3_threadsafe() != 0 )
+ {
+ msg_Err( p_sql, "Sqlite library on your system is not threadsafe" );
+ return VLC_EGENERIC;
+ }
+ if( sqlite3_open( p_sql->psz_host, &p_sql->p_sys->db ) != SQLITE_OK )
+ {
+ msg_Err( p_sql, "Can't open database : %s", p_sql->psz_host );
+ msg_Err( p_sql, "sqlite3 error: %d: %s",
+ sqlite3_errcode( p_sql->p_sys->db ),
+ sqlite3_errmsg( p_sql->p_sys->db ) );
+ return VLC_EGENERIC;
+ }
+ if( sqlite3_busy_timeout( p_sql->p_sys->db, 30000 ) != SQLITE_OK )
+ {
+ msg_Err( p_sql, "sqlite3 error: %d: %s",
+ sqlite3_errcode( p_sql->p_sys->db ),
+ sqlite3_errmsg( p_sql->p_sys->db ) );
+ return VLC_EGENERIC;
+ }
+ if( sqlite3_busy_handler( p_sql->p_sys->db, vlc_sqlite_busy_handler, p_sql )
+ != SQLITE_OK )
+ {
+ msg_Err( p_sql, "sqlite3 error: %d: %s",
+ sqlite3_errcode( p_sql->p_sys->db ),
+ sqlite3_errmsg( p_sql->p_sys->db ) );
+ return VLC_EGENERIC;
+ }
+
+ return VLC_SUCCESS;
+}
+
+/**
+ * @brief Close current database
+ * @param p_sql This sql_t object
+ * @return VLC_SUCCESS
+ * You have to set and open current database first
+ */
+static int CloseDatabase( sql_t *p_sql )
+{
+ assert( p_sql->p_sys->db );
+
+ /* Close all prepared statements */
+ sqlite3_stmt* p_stmt;
+ while( ( p_stmt = sqlite3_next_stmt( p_sql->p_sys->db, NULL ) ) != NULL )
+ {
+ if( sqlite3_finalize( p_stmt ) != SQLITE_OK )
+ {
+ msg_Warn( p_sql, "sqlite3 error: %d: %s",
+ sqlite3_errcode( p_sql->p_sys->db ),
+ sqlite3_errmsg( p_sql->p_sys->db ) );
+ }
+ }
+
+ /* Close database */
+ /* TODO: We've closed all open prepared statements
+ * Perhaps sqlite3_close can still fail? */
+ sqlite3_close( p_sql->p_sys->db );
+ p_sql->p_sys->db = NULL;
+
+ return VLC_SUCCESS;
+}
+
+/**
+ * @brief SQL Query with callback
+ * @param p_sql This sql_t object
+ * @param query SQL query
+ * @param callback Callback function to receive results row by row
+ * @param arg Argument to pass to callback
+ * @return VLC_SUCCESS or an error code
+ * You have to set and open current database first
+ */
+static int QueryCallback( sql_t * p_sql,
+ const char * query,
+ sql_query_callback_t callback,
+ void *arg )
+{
+ int i_ret = VLC_SUCCESS;
+ vlc_mutex_lock( &p_sql->p_sys->lock );
+ assert( p_sql->p_sys->db );
+#ifndef NDEBUG
+ msg_Dbg( p_sql, "QueryCallback: %s", query );
+#endif
+ sqlite3_exec( p_sql->p_sys->db, query, callback, arg, NULL );
+ if( sqlite3_errcode( p_sql->p_sys->db ) != SQLITE_OK )
+ {
+ msg_Warn( p_sql, "sqlite3 error: %d: %s",
+ sqlite3_errcode( p_sql->p_sys->db ),
+ sqlite3_errmsg( p_sql->p_sys->db ) );
+ i_ret = VLC_EGENERIC;
+ }
+
+ vlc_mutex_unlock( &p_sql->p_sys->lock );
+ return i_ret;
+}
+
+/**
+ * @brief Direct SQL Query
+ * @param p_sql This sql_t object
+ * @param query SQL query
+ * @param result Return value : Array of results
+ * @param nrow Return value : Row number
+ * @param ncol Return value : Column number
+ * @return VLC_SUCCESS or an error code
+ * You have to set and open current database first
+ * @todo Handle transaction closing due to errors in sql query
+ */
+static int Query( sql_t * p_sql,
+ const char * query,
+ char *** result,
+ int * nrow,
+ int * ncol )
+{
+ assert( p_sql->p_sys->db );
+ int i_ret = VLC_SUCCESS;
+ vlc_mutex_lock( &p_sql->p_sys->lock );
+
+#ifndef NDEBUG
+ msg_Dbg( p_sql, "Query: %s", query );
+#endif
+ sqlite3_get_table( p_sql->p_sys->db, query, result, nrow, ncol, NULL );
+ if( sqlite3_errcode( p_sql->p_sys->db ) != SQLITE_OK )
+ {
+ msg_Warn( p_sql, "sqlite3 error: %d: %s",
+ sqlite3_errcode( p_sql->p_sys->db ),
+ sqlite3_errmsg( p_sql->p_sys->db ) );
+ i_ret = VLC_EGENERIC;
+ }
+
+ vlc_mutex_unlock( &p_sql->p_sys->lock );
+ return i_ret;
+}
+
+/**
+ * @brief Get tables in database
+ * @param p_sql This sql_t object
+ * @param result SQL query result
+ * @return Number of elements
+ * You have to set and open current database first
+ */
+static int GetTables( sql_t * p_sql,
+ char *** result )
+{
+ int nrow, i_num = -1;
+
+ vlc_mutex_lock( &p_sql->p_sys->lock );
+
+ assert( p_sql->p_sys->db );
+
+ sqlite3_get_table( p_sql->p_sys->db, "SELECT * FROM sqlite_master;",
+ result, &nrow, &i_num, NULL );
+ if( sqlite3_errcode( p_sql->p_sys->db ) != SQLITE_OK )
+ {
+ msg_Warn( p_sql, "sqlite3 error: %d: %s",
+ sqlite3_errcode( p_sql->p_sys->db ),
+ sqlite3_errmsg( p_sql->p_sys->db ) );
+ }
+ vlc_mutex_unlock( &p_sql->p_sys->lock );
+ return i_num;
+}
+
+/**
+ * @brief Free SQL request's result
+ * @param p_sql This SQL object.
+ * @param ppsz_result SQL result to free
+ */
+static void FreeResult( sql_t * p_sql, char **ppsz_result )
+{
+ VLC_UNUSED( p_sql );
+ if( ppsz_result != NULL )
+ sqlite3_free_table( ppsz_result );
+}
+
+/**
+ * @brief vmprintf replacement for SQLite.
+ * @param psz_fmt Format string
+ * @param args va_list of arguments
+ * This function implements the formats %q, %Q and %z.
+ */
+static char* VMSprintf( const char* psz_fmt, va_list args )
+{
+ char *psz = sqlite3_vmprintf( psz_fmt, args );
+ char *ret = strdup( psz );
+ sqlite3_free( psz );
+ return ret;
+}
+
+/**
+ * @brief Starts a Transaction and waits if necessary
+ * @param p_sql The SQL object
+ * @note This function locks the transactions on the database.
+ * Within the period of the transaction, only the calling thread may
+ * execute sql statements provided all threads use these transaction fns.
+ */
+static int BeginTransaction( sql_t* p_sql )
+{
+ int i_ret = VLC_SUCCESS;
+ vlc_mutex_lock( &p_sql->p_sys->trans_lock );
+ vlc_mutex_lock( &p_sql->p_sys->lock );
+ assert( p_sql->p_sys->db );
+
+ sqlite3_exec( p_sql->p_sys->db, "BEGIN;", NULL, NULL, NULL );
+#ifndef NDEBUG
+ msg_Dbg( p_sql, "Transaction Query: BEGIN;" );
+#endif
+ if( sqlite3_errcode( p_sql->p_sys->db ) != SQLITE_OK )
+ {
+ vlc_mutex_unlock( &p_sql->p_sys->trans_lock );
+ vlc_mutex_unlock( &p_sql->p_sys->lock );
+ msg_Warn( p_sql, "sqlite3 error: %d: %s",
+ sqlite3_errcode( p_sql->p_sys->db ),
+ sqlite3_errmsg( p_sql->p_sys->db ) );
+ i_ret = VLC_EGENERIC;
+ }
+ vlc_mutex_unlock( &p_sql->p_sys->lock );
+ return i_ret;
+}
+
+/**
+ * @brief Commit a transaction
+ * @param p_sql The SQL object
+ * @note This function unlocks the transactions on the database
+ * Only the calling thread of "BeginTransaction" is allowed to call this method
+ * If the commit fails, the transaction lock is still held by the thread
+ * and this function may be retried or RollbackTransaction can be called
+ * @return VLC_SUCCESS or VLC_EGENERIC
+ */
+static int CommitTransaction( sql_t* p_sql )
+{
+ int i_ret = VLC_SUCCESS;
+ assert( p_sql->p_sys->db );
+ vlc_mutex_lock( &p_sql->p_sys->lock );
+
+ /** This turns the auto commit on. */
+ sqlite3_exec( p_sql->p_sys->db, "COMMIT;", NULL, NULL, NULL );
+#ifndef NDEBUG
+ msg_Dbg( p_sql, "Transaction Query: COMMIT;" );
+#endif
+ if( sqlite3_errcode( p_sql->p_sys->db ) != SQLITE_OK )
+ {
+ msg_Warn( p_sql, "sqlite3 error: %d: %s",
+ sqlite3_errcode( p_sql->p_sys->db ),
+ sqlite3_errmsg( p_sql->p_sys->db ) );
+ vlc_mutex_unlock( &p_sql->p_sys->trans_lock );
+ i_ret = VLC_EGENERIC;
+ }
+ vlc_mutex_unlock( &p_sql->p_sys->lock );
+ return i_ret;
+}
+
+/**
+ * @brief Rollback a transaction, in case of failure
+ * @param p_sql The SQL object
+ * @return VLC_SUCCESS or VLC_EGENERIC
+ * @note This function unlocks the transactions on the database
+ * Only the calling thread of "BeginTransaction" is allowed to call this method
+ * If failed, if a statement in the transaction failed, it means that
+ * the transaction was automatically rolled back
+ * If failed otherwise, the engine is busy executing some queries and you must
+ * try again
+ */
+static void RollbackTransaction( sql_t* p_sql )
+{
+ assert( p_sql->p_sys->db );
+ vlc_mutex_lock( &p_sql->p_sys->lock );
+
+ sqlite3_exec( p_sql->p_sys->db, "ROLLBACK;", NULL, NULL, NULL );
+#ifndef NDEBUG
+ msg_Dbg( p_sql, "Transaction Query: ROLLBACK;" );
+#endif
+ if( sqlite3_errcode( p_sql->p_sys->db ) != SQLITE_OK )
+ {
+ msg_Err( p_sql, "sqlite3 error: %d: %s",
+ sqlite3_errcode( p_sql->p_sys->db ),
+ sqlite3_errmsg( p_sql->p_sys->db ) );
+ }
+ vlc_mutex_unlock( &p_sql->p_sys->trans_lock );
+ vlc_mutex_unlock( &p_sql->p_sys->lock );
+}
+
+/**
+ * Prepare an sqlite statement
+ * @return statement object or NULL in case of failure
+ */
+static sql_stmt_t* PrepareStatement( sql_t* p_sql, const char* psz_fmt, int i_length )
+{
+ assert( p_sql->p_sys->db );
+ sql_stmt_t* p_stmt;
+ p_stmt = calloc( 1, sizeof( *p_stmt ) );
+ if( p_stmt == NULL )
+ return NULL;
+ vlc_mutex_lock( &p_sql->p_sys->lock );
+ if( sqlite3_prepare_v2( p_sql->p_sys->db, psz_fmt, i_length,
+ &p_stmt->p_sqlitestmt, NULL ) != SQLITE_OK )
+ {
+ msg_Warn( p_sql, "sqlite3 error: %d: %s",
+ sqlite3_errcode( p_sql->p_sys->db ),
+ sqlite3_errmsg( p_sql->p_sys->db ) );
+ vlc_mutex_unlock( &p_sql->p_sys->lock );
+ free( p_stmt );
+ return NULL;
+ }
+
+ vlc_mutex_unlock( &p_sql->p_sys->lock );
+ return p_stmt;
+}
+
+/**
+ * @brief Bind arguments to a sql_stmt_t object
+ * @param p_sql The SQL object
+ * @param p_stmt Statement Object
+ * @param i_pos Position at which the parameter should be bound
+ * @param i_type Data type of the value
+ * @param p_value Value to be bound
+ * @return VLC_SUCCESS or VLC_EGENERIC
+ */
+static int BindValues( sql_t* p_sql, sql_stmt_t* p_stmt,
+ int i_pos, unsigned int i_type, const sql_value_t* p_value )
+{
+ assert( p_sql->p_sys->db );
+ assert( p_stmt->p_sqlitestmt );
+ vlc_mutex_lock( &p_sql->p_sys->lock );
+ int i_ret, i_vlc_ret = VLC_SUCCESS;
+ switch( i_type )
+ {
+ case SQL_INT:
+ i_ret = sqlite3_bind_int( p_stmt->p_sqlitestmt, i_pos, p_value->value.i );
+ break;
+ case SQL_DOUBLE:
+ i_ret = sqlite3_bind_double( p_stmt->p_sqlitestmt, i_pos, p_value->value.dbl );
+ break;
+ case SQL_TEXT:
+ i_ret = sqlite3_bind_text( p_stmt->p_sqlitestmt, i_pos, p_value->value.psz, p_value->length, NULL );
+ break;
+ case SQL_BLOB:
+ i_ret = sqlite3_bind_blob( p_stmt->p_sqlitestmt, i_pos, p_value->value.ptr, p_value->length, NULL );
+ break;
+ case SQL_NULL:
+ i_ret = sqlite3_bind_null( p_stmt->p_sqlitestmt, i_pos );
+ break;
+ default:
+ msg_Warn( p_sql, "Trying to bind invalid type of value %d", i_type );
+ vlc_mutex_unlock( &p_sql->p_sys->lock );
+ return VLC_EGENERIC;
+ }
+ if( i_ret != SQLITE_OK )
+ {
+ msg_Warn( p_sql, "sqlite3 error: %d: %s",
+ sqlite3_errcode( p_sql->p_sys->db ),
+ sqlite3_errmsg( p_sql->p_sys->db ) );
+ i_vlc_ret = VLC_EGENERIC;
+ }
+ vlc_mutex_unlock( &p_sql->p_sys->lock );
+ return i_vlc_ret;
+}
+
+/**
+ * @brief Run the SQL statement. If the statement fetches data, then only
+ * one row of the data is fetched at a time. Run this function again to
+ * fetch the next row.
+ * @param p_sql The SQL object
+ * @param p_stmt The statement
+ * @return VLC_SQL_DONE if done fetching all rows or there are no rows to fetch
+ * VLC_SQL_ROW if a row was fetched for this statement.
+ * VLC_EGENERIC if this function failed
+ */
+static int StatementStep( sql_t* p_sql, sql_stmt_t* p_stmt )
+{
+ assert( p_sql->p_sys->db );
+ assert( p_stmt->p_sqlitestmt );
+ vlc_mutex_lock( &p_sql->p_sys->lock );
+ int i_sqlret = sqlite3_step( p_stmt->p_sqlitestmt );
+ int i_ret = VLC_EGENERIC;
+ if( i_sqlret == SQLITE_ROW )
+ i_ret = VLC_SQL_ROW;
+ else if( i_ret == SQLITE_DONE )
+ i_ret = VLC_SQL_DONE;
+ else
+ {
+ msg_Warn( p_sql, "sqlite3 error: %d: %s",
+ sqlite3_errcode( p_sql->p_sys->db ),
+ sqlite3_errmsg( p_sql->p_sys->db ) );
+ i_ret = VLC_EGENERIC;
+ }
+ vlc_mutex_unlock( &p_sql->p_sys->lock );
+ return i_ret;
+}
+
+/**
+ * @brief Reset the SQL statement. Resetting the statement will unbind all
+ * the values that were bound on this statement
+ * @param p_sql The SQL object
+ * @param p_stmt The sql statement object
+ * @return VLC_SUCCESS or VLC_EGENERIC
+ */
+static int StatementReset( sql_t* p_sql, sql_stmt_t* p_stmt )
+{
+ assert( p_sql->p_sys->db );
+ assert( p_stmt->p_sqlitestmt );
+ int i_ret = VLC_SUCCESS;
+ vlc_mutex_lock( &p_sql->p_sys->lock );
+ if( sqlite3_reset( p_stmt->p_sqlitestmt ) != SQLITE_OK )
+ {
+ msg_Warn( p_sql, "sqlite3 error: %d: %s",
+ sqlite3_errcode( p_sql->p_sys->db ),
+ sqlite3_errmsg( p_sql->p_sys->db ) );
+ i_ret = VLC_EGENERIC;
+ }
+ vlc_mutex_unlock( &p_sql->p_sys->lock );
+ return i_ret;
+}
+
+/**
+ * @brief Destroy the sql statement object. This will free memory.
+ * @param p_sql The SQL object
+ * @param p_stmt The statement object
+ * @return VLC_SUCCESS or VLC_EGENERIC
+ */
+static int StatementFinalize( sql_t* p_sql, sql_stmt_t* p_stmt )
+{
+ assert( p_sql->p_sys->db );
+ assert( p_stmt->p_sqlitestmt );
+ int i_ret = VLC_SUCCESS;
+ vlc_mutex_lock( &p_sql->p_sys->lock );
+ if( sqlite3_finalize( p_stmt->p_sqlitestmt ) != SQLITE_OK )
+ {
+ msg_Warn( p_sql, "sqlite3 error: %d: %s",
+ sqlite3_errcode( p_sql->p_sys->db ),
+ sqlite3_errmsg( p_sql->p_sys->db ) );
+ i_ret = VLC_EGENERIC;
+ }
+ free( p_stmt );
+ vlc_mutex_unlock( &p_sql->p_sys->lock );
+ return i_ret;
+}
+
+/**
+ * @brief Get the column data
+ * @param p_sql The SQL object
+ * @param p_stmt The statement object
+ * @param i_col The column number
+ * @param type Datatype of result
+ * @param p_res The structure which contains the value of the result
+ * @return VLC_SUCCESS or VLC_EGENERIC
+ */
+static int GetColumnFromStatement( sql_t* p_sql, sql_stmt_t* p_stmt, int i_col,
+ int type, sql_value_t *p_res )
+{
+ assert( p_sql->p_sys->db );
+ assert( p_stmt->p_sqlitestmt );
+ int i_ret = VLC_SUCCESS;
+ vlc_mutex_lock( &p_sql->p_sys->lock );
+ switch( type )
+ {
+ case SQL_INT:
+ p_res->value.i = sqlite3_column_int( p_stmt->p_sqlitestmt, i_col );
+ break;
+ case SQL_DOUBLE:
+ p_res->value.dbl = sqlite3_column_double( p_stmt->p_sqlitestmt, i_col );
+ break;
+ case SQL_TEXT:
+ p_res->value.psz = sqlite3_column_text( p_stmt->p_sqlitestmt, i_col );
+ break;
+ case SQL_BLOB:
+ p_res->value.ptr = sqlite3_column_blob( p_stmt->p_sqlitestmt, i_col );
+ break;
+ case SQL_NULL:
+ default:
+ msg_Warn( p_sql, "Trying to bind invalid type of value %d", type );
+ i_ret = VLC_EGENERIC;
+ }
+ vlc_mutex_unlock( &p_sql->p_sys->lock );
+ return i_ret;
+}
+
+/**
+ * @brief Get the datatype of the result of the column
+ * @param p_sql The SQL object
+ * @param p_stmt The sql statement object
+ * @param i_col The column
+ * @param pi_type pointer to datatype of the given column
+ * @return VLC_SUCCESS or VLC_EGENERIC
+ */
+static int GetColumnTypeFromStatement( sql_t* p_sql, sql_stmt_t* p_stmt, int i_col,
+ int* pi_type )
+{
+ assert( p_sql->p_sys->db );
+ assert( p_stmt->p_sqlitestmt );
+ assert( pi_type );
+ vlc_mutex_lock( &p_sql->p_sys->lock );
+ int i_ret = VLC_SUCCESS;
+ int i_sqlret = sqlite3_column_type( p_stmt->p_sqlitestmt, i_col );
+ switch( i_sqlret )
+ {
+ case SQLITE_INTEGER:
+ *pi_type = SQL_INT;
+ break;
+ case SQLITE_FLOAT:
+ *pi_type= SQL_DOUBLE;
+ break;
+ case SQLITE_TEXT:
+ *pi_type = SQL_TEXT;
+ break;
+ case SQLITE_BLOB:
+ *pi_type = SQL_BLOB;
+ break;
+ case SQLITE_NULL:
+ *pi_type = SQL_NULL;
+ break;
+ default:
+ i_ret = VLC_EGENERIC;
+ }
+ vlc_mutex_unlock( &p_sql->p_sys->lock );
+ return i_ret;
+}
projects / vlc / commitdiff