protected override ArraySegment <byte> WriteParameters()
{
if (_parameters == null)
{
return(new ArraySegment <byte>());
}
using (var stream = new MemoryStream())
{
var xdr = new XdrBinaryWriter(stream, _database.Charset);
try
{
var bits = new BitArray(_parameters.Count);
for (int i = 0; i < _parameters.Count; i++)
{
var field = _parameters[i];
bits.Set(i, field.DbValue.IsDBNull());
}
var buffer = new byte[(int)Math.Ceiling(_parameters.Count / 8d)];
for (int i = 0; i < buffer.Length * 8; i++)
{
var index = i / 8;
// LSB
buffer[index] = (byte)((buffer[index] >> 1) | (bits.Length > i && bits[i] ? 1 << 7 : 0));
}
xdr.WriteOpaque(buffer);
for (var i = 0; i < _parameters.Count; i++)
{
var field = _parameters[i];
if (field.DbValue.IsDBNull())
{
continue;
}
WriteRawParameter(xdr, field);
}
return(stream.ToArraySegment());
}
catch (IOException ex)
{
throw IscException.ForErrorCode(IscCodes.isc_net_write_err, ex);
}
}
}
protected void WriteRawParameter(XdrBinaryWriter xdr, DbField field)
{
if (field.DbDataType != DbDataType.Null)
{
field.FixNull();
switch (field.DbDataType)
{
case DbDataType.Char:
if (field.Charset.IsOctetsCharset)
{
xdr.WriteOpaque(field.DbValue.GetBinary(), field.Length);
}
else
{
var svalue = field.DbValue.GetString();
if ((field.Length % field.Charset.BytesPerCharacter) == 0 &&
svalue.Length > field.CharCount)
{
throw IscException.ForErrorCodes(new[] { IscCodes.isc_arith_except, IscCodes.isc_string_truncation });
}
xdr.WriteOpaque(field.Charset.GetBytes(svalue), field.Length);
}
break;
case DbDataType.VarChar:
if (field.Charset.IsOctetsCharset)
{
xdr.WriteBuffer(field.DbValue.GetBinary());
}
else
{
var svalue = field.DbValue.GetString();
if ((field.Length % field.Charset.BytesPerCharacter) == 0 &&
svalue.Length > field.CharCount)
{
throw IscException.ForErrorCodes(new[] { IscCodes.isc_arith_except, IscCodes.isc_string_truncation });
}
xdr.WriteBuffer(field.Charset.GetBytes(svalue));
}
break;
case DbDataType.SmallInt:
xdr.Write(field.DbValue.GetInt16());
break;
case DbDataType.Integer:
xdr.Write(field.DbValue.GetInt32());
break;
case DbDataType.BigInt:
case DbDataType.Array:
case DbDataType.Binary:
case DbDataType.Text:
xdr.Write(field.DbValue.GetInt64());
break;
case DbDataType.Decimal:
case DbDataType.Numeric:
xdr.Write(field.DbValue.GetDecimal(), field.DataType, field.NumericScale);
break;
case DbDataType.Float:
xdr.Write(field.DbValue.GetFloat());
break;
case DbDataType.Guid:
xdr.WriteOpaque(field.DbValue.GetGuid().ToByteArray());
break;
case DbDataType.Double:
xdr.Write(field.DbValue.GetDouble());
break;
case DbDataType.Date:
xdr.Write(field.DbValue.GetDate());
break;
case DbDataType.Time:
xdr.Write(field.DbValue.GetTime());
break;
case DbDataType.TimeStamp:
xdr.Write(field.DbValue.GetDate());
xdr.Write(field.DbValue.GetTime());
break;
case DbDataType.Boolean:
xdr.Write(Convert.ToBoolean(field.Value));
break;
default:
throw IscException.ForStrParam($"Unknown SQL data type: {field.DataType}.");
}
}
}
private byte[] EncodeSliceArray(Array sourceArray)
{
DbDataType dbType = DbDataType.Array;
Charset charset = _database.Charset;
int subType = (Descriptor.Scale < 0) ? 2 : 0;
int type = 0;
using (var stream = new MemoryStream())
{
var xdr = new XdrBinaryWriter(stream, _database.Charset);
type = TypeHelper.GetSqlTypeFromBlrType(Descriptor.DataType);
dbType = TypeHelper.GetDbDataTypeFromBlrType(Descriptor.DataType, subType, Descriptor.Scale);
foreach (object source in sourceArray)
{
switch (dbType)
{
case DbDataType.Char:
byte[] buffer = charset.GetBytes(source.ToString());
xdr.WriteOpaque(buffer, Descriptor.Length);
break;
case DbDataType.VarChar:
xdr.Write((string)source);
break;
case DbDataType.SmallInt:
xdr.Write((short)source);
break;
case DbDataType.Integer:
xdr.Write((int)source);
break;
case DbDataType.BigInt:
xdr.Write((long)source);
break;
case DbDataType.Decimal:
case DbDataType.Numeric:
xdr.Write((decimal)source, type, Descriptor.Scale);
break;
case DbDataType.Float:
xdr.Write((float)source);
break;
case DbDataType.Double:
xdr.Write((double)source);
break;
case DbDataType.Date:
xdr.WriteDate(Convert.ToDateTime(source, CultureInfo.CurrentCulture.DateTimeFormat));
break;
case DbDataType.Time:
xdr.WriteTime((TimeSpan)source);
break;
case DbDataType.TimeStamp:
xdr.Write(Convert.ToDateTime(source, CultureInfo.CurrentCulture.DateTimeFormat));
break;
default:
throw TypeHelper.InvalidDataType((int)dbType);
}
}
return(stream.ToArray());
}
}