internal override void SetUpdateHook(SQLiteUpdateCallback func)
{
UnsafeNativeMethods.sqlite3_update_hook(_sql, func, IntPtr.Zero);
}
internal override void ReturnText(IntPtr context, string value)
{
byte[] b = ToUTF8(value);
UnsafeNativeMethods.sqlite3_result_text(context, ToUTF8(value), b.Length - 1, (IntPtr)(-1));
}
internal override IntPtr AggregateContext(IntPtr context)
{
return(UnsafeNativeMethods.sqlite3_aggregate_context(context, 1));
}
internal override void ReturnInt32(IntPtr context, int value)
{
UnsafeNativeMethods.sqlite3_result_int(context, value);
}
internal override void ReturnNull(IntPtr context)
{
UnsafeNativeMethods.sqlite3_result_null(context);
}
internal override int Bind_ParamCount(SqliteStatement stmt)
{
return(UnsafeNativeMethods.sqlite3_bind_parameter_count(stmt._sqlite_stmt));
}
internal override void ReturnError(IntPtr context, string value)
{
UnsafeNativeMethods.sqlite3_result_error(context, ToUTF8(value), value.Length);
}
internal override int GetParamValueInt32(IntPtr ptr)
{
return(UnsafeNativeMethods.sqlite3_value_int(ptr));
}
internal override TypeAffinity GetParamValueType(IntPtr ptr)
{
return(UnsafeNativeMethods.sqlite3_value_type(ptr));
}
internal override int GetInt32(SqliteStatement stmt, int index)
{
return(UnsafeNativeMethods.sqlite3_column_int(stmt._sqlite_stmt, index));
}
internal override void Cancel()
{
UnsafeNativeMethods.sqlite3_interrupt(_sql);
}
internal override TypeAffinity ColumnAffinity(SqliteStatement stmt, int index)
{
return(UnsafeNativeMethods.sqlite3_column_type(stmt._sqlite_stmt, index));
}
internal override int ColumnCount(SqliteStatement stmt)
{
return(UnsafeNativeMethods.sqlite3_column_count(stmt._sqlite_stmt));
}
internal override int Bind_ParamIndex(SqliteStatement stmt, string paramName)
{
return(UnsafeNativeMethods.sqlite3_bind_parameter_index(stmt._sqlite_stmt, ToUTF8(paramName)));
}
internal override void SetCommitHook(SQLiteCommitCallback func)
{
UnsafeNativeMethods.sqlite3_commit_hook(_sql, func, IntPtr.Zero);
}
internal override void ReturnBlob(IntPtr context, byte[] value)
{
UnsafeNativeMethods.sqlite3_result_blob(context, value, value.Length, (IntPtr)(-1));
}
internal override void SetRollbackHook(SQLiteRollbackCallback func)
{
UnsafeNativeMethods.sqlite3_rollback_hook(_sql, func, IntPtr.Zero);
}
internal override SqliteStatement Prepare(SqliteConnection cnn, string strSql, SqliteStatement previous, uint timeoutMS, out string strRemain)
{
IntPtr stmt = IntPtr.Zero;
IntPtr ptr = IntPtr.Zero;
int len = 0;
int n = 17;
int retries = 0;
byte[] b = ToUTF8(strSql);
string typedefs = null;
SqliteStatement cmd = null;
Random rnd = null;
uint starttick = (uint)Environment.TickCount;
GCHandle handle = GCHandle.Alloc(b, GCHandleType.Pinned);
IntPtr psql = handle.AddrOfPinnedObject();
try
{
while ((n == 17 || n == 6 || n == 5) && retries < 3)
{
#if !SQLITE_STANDARD
n = UnsafeNativeMethods.sqlite3_prepare_interop(_sql, psql, b.Length - 1, out stmt, out ptr, out len);
#else
n = UnsafeNativeMethods.sqlite3_prepare(_sql, psql, b.Length - 1, out stmt, out ptr);
len = -1;
#endif
if (n == 17)
{
retries++;
}
else if (n == 1)
{
if (String.Compare(SQLiteLastError(), "near \"TYPES\": syntax error", StringComparison.OrdinalIgnoreCase) == 0)
{
int pos = strSql.IndexOf(';');
if (pos == -1)
{
pos = strSql.Length - 1;
}
typedefs = strSql.Substring(0, pos + 1);
strSql = strSql.Substring(pos + 1);
strRemain = "";
while (cmd == null && strSql.Length > 0)
{
cmd = Prepare(cnn, strSql, previous, timeoutMS, out strRemain);
strSql = strRemain;
}
if (cmd != null)
{
cmd.SetTypes(typedefs);
}
return(cmd);
}
#if !PLATFORM_COMPACTFRAMEWORK
else if (_buildingSchema == false && String.Compare(SQLiteLastError(), 0, "no such table: TEMP.SCHEMA", 0, 26, StringComparison.OrdinalIgnoreCase) == 0)
{
strRemain = "";
_buildingSchema = true;
try
{
ISQLiteSchemaExtensions ext = ((IServiceProvider)SqliteFactory.Instance).GetService(typeof(ISQLiteSchemaExtensions)) as ISQLiteSchemaExtensions;
if (ext != null)
{
ext.BuildTempSchema(cnn);
}
while (cmd == null && strSql.Length > 0)
{
cmd = Prepare(cnn, strSql, previous, timeoutMS, out strRemain);
strSql = strRemain;
}
return(cmd);
}
finally
{
_buildingSchema = false;
}
}
#endif
}
else if (n == 6 || n == 5) // Locked -- delay a small amount before retrying
{
// Keep trying
if (rnd == null) // First time we've encountered the lock
{
rnd = new Random();
}
// If we've exceeded the command's timeout, give up and throw an error
if ((uint)Environment.TickCount - starttick > timeoutMS)
{
throw new SqliteException(n, SQLiteLastError());
}
else
{
// Otherwise sleep for a random amount of time up to 150ms
System.Threading.Thread.CurrentThread.Join(rnd.Next(1, 150));
}
}
}
if (n > 0)
{
throw new SqliteException(n, SQLiteLastError());
}
strRemain = UTF8ToString(ptr, len);
if (stmt != IntPtr.Zero)
{
cmd = new SqliteStatement(this, stmt, strSql.Substring(0, strSql.Length - strRemain.Length), previous);
}
return(cmd);
}
finally
{
handle.Free();
}
}
