/// <summary>
/// Byte array from bytea encoded as ASCII text, escaped or hex format.
/// </summary>
internal static Object ByteaTextToByteArray(NpgsqlBackendTypeInfo TypeInfo, byte[] BackendData, Int16 TypeSize, Int32 TypeModifier)
{
Int32 byteALength = BackendData.Length;
Int32 byteAPosition = 0;
if (byteALength >= 2 && BackendData[0] == (byte)ASCIIBytes.BackSlash && BackendData[1] == (byte)ASCIIBytes.x)
{
// PostgreSQL 8.5+'s bytea_output=hex format
byte[] result = new byte[(byteALength - 2) / 2];
#if UNSAFE
unsafe
{
fixed(byte *pBackendData = &BackendData[2])
{
fixed(byte *pResult = &result[0])
{
byte *pBackendData2 = pBackendData;
byte *pResult2 = pResult;
for (byteAPosition = 2; byteAPosition < byteALength; byteAPosition += 2)
{
*pResult2 = FastConverter.ToByteHexFormat(pBackendData2);
pBackendData2 += 2;
pResult2++;
}
}
}
}
#else
Int32 k = 0;
for (byteAPosition = 2; byteAPosition < byteALength; byteAPosition += 2)
{
result[k] = FastConverter.ToByteHexFormat(BackendData, byteAPosition);
k++;
}
#endif
return(result);
}
else
{
byte octalValue = 0;
MemoryStream ms = new MemoryStream();
while (byteAPosition < byteALength)
{
// The IsDigit is necessary in case we receive a \ as the octal value and not
// as the indicator of a following octal value in decimal format.
// i.e.: \201\301P\A
if (BackendData[byteAPosition] == (byte)ASCIIBytes.BackSlash)
{
if (byteAPosition + 1 == byteALength)
{
octalValue = (byte)ASCIIBytes.BackSlash;
byteAPosition++;
}
else if (BackendData[byteAPosition + 1] >= (byte)ASCIIBytes.b0 && BackendData[byteAPosition + 1] <= (byte)ASCIIBytes.b7)
{
octalValue = FastConverter.ToByteEscapeFormat(BackendData, byteAPosition + 1);
byteAPosition += 4;
}
else
{
octalValue = (byte)ASCIIBytes.BackSlash;
byteAPosition += 2;
}
}
else
{
octalValue = BackendData[byteAPosition];
byteAPosition++;
}
ms.WriteByte((Byte)octalValue);
}
return(ms.ToArray());
}
}
/// <summary>
/// Byte array from bytea encoded as text, escaped or hex format.
/// </summary>
internal static Object ByteaTextToByteArray(NpgsqlBackendTypeInfo TypeInfo, String BackendData, Int16 TypeSize, Int32 TypeModifier)
{
Int32 byteAPosition = 0;
Int32 byteAStringLength = BackendData.Length;
if (BackendData.StartsWith("\\x"))
{
// PostgreSQL 8.5+'s bytea_output=hex format
byte[] result = new byte[byteAStringLength / 2];
//unsafe
{
//fixed (byte* p = &result[0])
{
// byte* ptr = p;
int k = 0;
for (byteAPosition = 2; byteAPosition < byteAStringLength; byteAPosition += 2)
{
//*ptr=
result[k] = FastConverter.ToByte(BackendData, byteAPosition);
k++;
//ptr++;
}
}
}
return(result);
}
else
{
Int32 octalValue = 0;
MemoryStream ms = new MemoryStream();
while (byteAPosition < byteAStringLength)
{
// The IsDigit is necessary in case we receive a \ as the octal value and not
// as the indicator of a following octal value in decimal format.
// i.e.: \201\301P\A
if (BackendData[byteAPosition] == '\\')
{
if (byteAPosition + 1 == byteAStringLength)
{
octalValue = '\\';
byteAPosition++;
}
else if (Char.IsDigit(BackendData[byteAPosition + 1]))
{
octalValue = Convert.ToByte(BackendData.Substring(byteAPosition + 1, 3), 8);
//octalValue = (Byte.Parse(BackendData[byteAPosition + 1].ToString()) << 6);
//octalValue |= (Byte.Parse(BackendData[byteAPosition + 2].ToString()) << 3);
//octalValue |= Byte.Parse(BackendData[byteAPosition + 3].ToString());
byteAPosition += 4;
}
else
{
octalValue = '\\';
byteAPosition += 2;
}
}
else
{
octalValue = (Byte)BackendData[byteAPosition];
byteAPosition++;
}
ms.WriteByte((Byte)octalValue);
}
return(ms.ToArray());
}
}
