/// <summary>
/// Initializes the statement and attempts to get all information about parameters in the statement
/// </summary>
/// <param name="sqlbase">The base SQLite object</param>
/// <param name="flags">The flags associated with the parent connection object</param>
/// <param name="stmt">The statement</param>
/// <param name="strCommand">The command text for this statement</param>
/// <param name="previous">The previous command in a multi-statement command</param>
internal SQLiteStatement(SQLiteBase sqlbase, SQLiteConnectionFlags flags, SQLiteStatementHandle stmt, string strCommand, SQLiteStatement previous)
{
_sql = sqlbase;
_sqlite_stmt = stmt;
_sqlStatement = strCommand;
_flags = flags;
// Determine parameters for this statement (if any) and prepare space for them.
int nCmdStart = 0;
int n = _sql.Bind_ParamCount(this, _flags);
int x;
string s;
if (n > 0)
{
if (previous != null)
nCmdStart = previous._unnamedParameters;
_paramNames = new string[n];
_paramValues = new SQLiteParameter[n];
for (x = 0; x < n; x++)
{
s = _sql.Bind_ParamName(this, _flags, x + 1);
if (String.IsNullOrEmpty(s))
{
s = String.Format(CultureInfo.InvariantCulture, ";{0}", nCmdStart);
nCmdStart++;
_unnamedParameters++;
}
_paramNames[x] = s;
_paramValues[x] = null;
}
}
}
/// <summary>
/// Initializes the backup.
/// </summary>
/// <param name="sqlbase">The base SQLite object.</param>
/// <param name="backup">The backup handle.</param>
/// <param name="destDb">The destination database for the backup.</param>
/// <param name="zDestName">The destination database name for the backup.</param>
/// <param name="sourceDb">The source database for the backup.</param>
/// <param name="zSourceName">The source database name for the backup.</param>
internal SQLiteBackup(
SQLiteBase sqlbase,
SQLiteBackupHandle backup,
IntPtr destDb,
byte[] zDestName,
IntPtr sourceDb,
byte[] zSourceName
)
{
_sql = sqlbase;
_sqlite_backup = backup;
_destDb = destDb;
_zDestName = zDestName;
_sourceDb = sourceDb;
_zSourceName = zSourceName;
}
///////////////////////////////////////////////////////////////////////////////////////////////
private void Dispose(bool disposing)
{
if (!disposed)
{
if (disposing)
{
////////////////////////////////////
// dispose managed resources here...
////////////////////////////////////
if (_sqlite_stmt != null)
{
_sqlite_stmt.Dispose();
_sqlite_stmt = null;
}
_paramNames = null;
_paramValues = null;
_sql = null;
_sqlStatement = null;
}
//////////////////////////////////////
// release unmanaged resources here...
//////////////////////////////////////
disposed = true;
}
}
///////////////////////////////////////////////////////////////////////
/// <summary>
/// Initializes the SQLite logging facilities.
/// </summary>
public static void Initialize()
{
//
// BUFXIX: We cannot initialize the logging interface if the SQLite
// core library has already been initialized anywhere in
// the process (see ticket [2ce0870fad]).
//
if (SQLite3.StaticIsInitialized())
return;
#if !PLATFORM_COMPACTFRAMEWORK
//
// BUGFIX: To avoid nasty situations where multiple AppDomains are
// attempting to initialize and/or shutdown what is really
// a shared native resource (i.e. the SQLite core library
// is loaded per-process and has only one logging callback,
// not one per-AppDomain, which it knows nothing about),
// prevent all non-default AppDomains from registering a
// log handler unless the "Force_SQLiteLog" environment
// variable is used to manually override this safety check.
//
if (!AppDomain.CurrentDomain.IsDefaultAppDomain() &&
UnsafeNativeMethods.GetSettingValue("Force_SQLiteLog", null) == null)
{
return;
}
#endif
lock (syncRoot)
{
#if !PLATFORM_COMPACTFRAMEWORK
//
// NOTE: Add an event handler for the DomainUnload event so
// that we can unhook our logging managed function
// pointer from the native SQLite code prior to it
// being invalidated.
//
// BUGFIX: Make sure this event handler is only added one
// time (per-AppDomain).
//
if (_domainUnload == null)
{
_domainUnload = new EventHandler(DomainUnload);
AppDomain.CurrentDomain.DomainUnload += _domainUnload;
}
#endif
#if !INTEROP_LOG
//
// NOTE: Create an instance of the SQLite wrapper class.
//
if (_sql == null)
{
_sql = new SQLite3(
SQLiteDateFormats.Default, DateTimeKind.Unspecified,
null, IntPtr.Zero, null, false);
}
//
// NOTE: Create a single "global" (i.e. per-process) callback
// to register with SQLite. This callback will pass the
// event on to any registered handler. We only want to
// do this once.
//
if (_callback == null)
{
_callback = new SQLiteLogCallback(LogCallback);
SQLiteErrorCode rc = _sql.SetLogCallback(_callback);
if (rc != SQLiteErrorCode.Ok)
throw new SQLiteException(rc,
"Failed to initialize logging.");
}
#endif
//
// NOTE: Logging is enabled by default.
//
_enabled = true;
//
// NOTE: For now, always setup the default log event handler.
//
AddDefaultHandler();
}
}
///////////////////////////////////////////////////////////////////////////////////////////////
private void Dispose(bool disposing)
{
if (!disposed)
{
if (disposing)
{
////////////////////////////////////
// dispose managed resources here...
////////////////////////////////////
if (_sqlite_backup != null)
{
_sqlite_backup.Dispose();
_sqlite_backup = null;
}
_zSourceName = null;
_sourceDb = IntPtr.Zero;
_zDestName = null;
_destDb = IntPtr.Zero;
_sql = null;
}
//////////////////////////////////////
// release unmanaged resources here...
//////////////////////////////////////
disposed = true;
}
}
/// <summary>
/// This function binds a user-defined functions to a connection.
/// </summary>
/// <param name="sqliteBase">
/// The <see cref="SQLiteBase" /> object instance associated with the
/// <see cref="SQLiteConnection" /> that the function should be bound to.
/// </param>
/// <param name="functionAttribute">
/// The <see cref="SQLiteFunctionAttribute"/> object instance containing
/// the metadata for the function to be bound.
/// </param>
/// <param name="function">
/// The <see cref="SQLiteFunction"/> object instance that implements the
/// function to be bound.
/// </param>
/// <param name="flags">
/// The flags associated with the parent connection object.
/// </param>
internal static void BindFunction(
SQLiteBase sqliteBase,
SQLiteFunctionAttribute functionAttribute,
SQLiteFunction function,
SQLiteConnectionFlags flags
)
{
if (sqliteBase == null)
throw new ArgumentNullException("sqliteBase");
if (functionAttribute == null)
throw new ArgumentNullException("functionAttribute");
if (function == null)
throw new ArgumentNullException("function");
FunctionType functionType = functionAttribute.FuncType;
function._base = sqliteBase;
function._flags = flags;
function._InvokeFunc = (functionType == FunctionType.Scalar) ?
new SQLiteCallback(function.ScalarCallback) : null;
function._StepFunc = (functionType == FunctionType.Aggregate) ?
new SQLiteCallback(function.StepCallback) : null;
function._FinalFunc = (functionType == FunctionType.Aggregate) ?
new SQLiteFinalCallback(function.FinalCallback) : null;
function._CompareFunc = (functionType == FunctionType.Collation) ?
new SQLiteCollation(function.CompareCallback) : null;
function._CompareFunc16 = (functionType == FunctionType.Collation) ?
new SQLiteCollation(function.CompareCallback16) : null;
string name = functionAttribute.Name;
if (functionType != FunctionType.Collation)
{
bool needCollSeq = (function is SQLiteFunctionEx);
sqliteBase.CreateFunction(
name, functionAttribute.Arguments, needCollSeq,
function._InvokeFunc, function._StepFunc,
function._FinalFunc);
}
else
{
sqliteBase.CreateCollation(
name, function._CompareFunc, function._CompareFunc16);
}
}
/// <summary>
/// Called by SQLiteBase derived classes, this function binds all user-defined functions to a connection.
/// It is done this way so that all user-defined functions will access the database using the same encoding scheme
/// as the connection (UTF-8 or UTF-16).
/// </summary>
/// <remarks>
/// The wrapper functions that interop with SQLite will create a unique cookie value, which internally is a pointer to
/// all the wrapped callback functions. The interop function uses it to map CDecl callbacks to StdCall callbacks.
/// </remarks>
/// <param name="sqlbase">The base object on which the functions are to bind</param>
/// <param name="flags">The flags associated with the parent connection object</param>
/// <returns>Returns a logical list of functions which the connection should retain until it is closed.</returns>
internal static IEnumerable<SQLiteFunction> BindFunctions(SQLiteBase sqlbase, SQLiteConnectionFlags flags)
{
List<SQLiteFunction> lFunctions = new List<SQLiteFunction>();
foreach (SQLiteFunctionAttribute pr in _registeredFunctions)
{
SQLiteFunction f = (SQLiteFunction)Activator.CreateInstance(pr.InstanceType);
BindFunction(sqlbase, pr, f, flags);
lFunctions.Add(f);
}
return lFunctions;
}
///////////////////////////////////////////////////////////////////////////////////////////////
/// <summary>
/// Placeholder for a user-defined disposal routine
/// </summary>
/// <param name="disposing">True if the object is being disposed explicitly</param>
protected virtual void Dispose(bool disposing)
{
if (!disposed)
{
if (disposing)
{
////////////////////////////////////
// dispose managed resources here...
////////////////////////////////////
IDisposable disp;
foreach (KeyValuePair<IntPtr, AggregateData> kv in _contextDataList)
{
disp = kv.Value._data as IDisposable;
if (disp != null)
disp.Dispose();
}
_contextDataList.Clear();
_contextDataList = null;
_flags = SQLiteConnectionFlags.None;
_InvokeFunc = null;
_StepFunc = null;
_FinalFunc = null;
_CompareFunc = null;
_base = null;
}
//////////////////////////////////////
// release unmanaged resources here...
//////////////////////////////////////
disposed = true;
}
}
/// <summary>
/// Constructs an instance of this class using the specified data-type
/// conversion parameters.
/// </summary>
/// <param name="format">
/// The DateTime format to be used when converting string values to a
/// DateTime and binding DateTime parameters.
/// </param>
/// <param name="kind">
/// The <see cref="DateTimeKind" /> to be used when creating DateTime
/// values.
/// </param>
/// <param name="formatString">
/// The format string to be used when parsing and formatting DateTime
/// values.
/// </param>
/// <param name="utf16">
/// Non-zero to create a UTF-16 data-type conversion context; otherwise,
/// a UTF-8 data-type conversion context will be created.
/// </param>
protected SQLiteFunction(
SQLiteDateFormats format,
DateTimeKind kind,
string formatString,
bool utf16
)
: this()
{
if (utf16)
_base = new SQLite3_UTF16(format, kind, formatString, IntPtr.Zero, null, false);
else
_base = new SQLite3(format, kind, formatString, IntPtr.Zero, null, false);
}
