internal SqliteDataReader(SqliteCommand cmd, Sqlite3.Vdbe pVm, int version)
{
command = cmd;
rows = new ArrayList();
column_names_sens = new Hashtable();
column_names_insens = new Hashtable(CaseInsensitiveHashCodeProvider.DefaultInvariant,
CaseInsensitiveComparer.DefaultInvariant);
closed = false;
current_row = -1;
reading = true;
ReadpVm(pVm, version, cmd);
ReadingDone();
}
internal void ReadpVm(Sqlite3.Vdbe pVm, int version, SqliteCommand cmd)
{
int pN;
IntPtr pazValue;
IntPtr pazColName;
bool first = true;
int[] declmode = null;
while (true)
{
bool hasdata = cmd.ExecuteStatement(pVm, out pN, out pazValue, out pazColName);
// For the first row, get the column information
if (first)
{
first = false;
if (version == 3)
{
// A decltype might be null if the type is unknown to sqlite.
decltypes = new string[pN];
declmode = new int[pN]; // 1 == integer, 2 == datetime
for (int i = 0; i < pN; i++)
{
string decl = Sqlite3.sqlite3_column_decltype(pVm, i);
if (decl != null)
{
decltypes[i] = decl.ToLower(System.Globalization.CultureInfo.InvariantCulture);
if (decltypes[i] == "int" || decltypes[i] == "integer")
declmode[i] = 1;
else if (decltypes[i] == "date" || decltypes[i] == "datetime")
declmode[i] = 2;
}
}
}
columns = new string[pN];
for (int i = 0; i < pN; i++)
{
string colName;
//if (version == 2) {
// IntPtr fieldPtr = Marshal.ReadIntPtr (pazColName, i*IntPtr.Size);
// colName = Sqlite.HeapToString (fieldPtr, ((SqliteConnection)cmd.Connection).Encoding);
//} else {
colName = Sqlite3.sqlite3_column_name(pVm, i);
//}
columns[i] = colName;
column_names_sens[colName] = i;
column_names_insens[colName] = i;
}
}
if (!hasdata) break;
object[] data_row = new object[pN];
for (int i = 0; i < pN; i++)
{
/*
if (version == 2) {
IntPtr fieldPtr = Marshal.ReadIntPtr (pazValue, i*IntPtr.Size);
data_row[i] = Sqlite.HeapToString (fieldPtr, ((SqliteConnection)cmd.Connection).Encoding);
} else {
*/
switch (Sqlite3.sqlite3_column_type(pVm, i))
{
case 1:
long val = Sqlite3.sqlite3_column_int64(pVm, i);
// If the column was declared as an 'int' or 'integer', let's play
// nice and return an int (version 3 only).
if (declmode[i] == 1 && val >= int.MinValue && val <= int.MaxValue)
data_row[i] = (int)val;
// Or if it was declared a date or datetime, do the reverse of what we
// do for DateTime parameters.
else if (declmode[i] == 2)
data_row[i] = DateTime.FromFileTime(val);
else
data_row[i] = val;
break;
case 2:
data_row[i] = Sqlite3.sqlite3_column_double(pVm, i);
break;
case 3:
data_row[i] = Sqlite3.sqlite3_column_text(pVm, i);
// If the column was declared as a 'date' or 'datetime', let's play
// nice and return a DateTime (version 3 only).
if (declmode[i] == 2)
if (data_row[i] == null) data_row[i] = null;
else data_row[i] = DateTime.Parse((string)data_row[i]);
if (data_row[i] == null)
data_row[i] = string.Empty;
break;
case 4:
int blobbytes = Sqlite3.sqlite3_column_bytes16(pVm, i);
byte[] blob = Sqlite3.sqlite3_column_blob(pVm, i);
//byte[] blob = new byte[blobbytes];
//Marshal.Copy (blobptr, blob, 0, blobbytes);
data_row[i] = blob;
break;
case 5:
data_row[i] = null;
break;
default:
throw new ApplicationException("FATAL: Unknown sqlite3_column_type");
//}
}
}
rows.Add(data_row);
}
}
