/// <summary>
/// Binary data in the new hex format (>= 9.0), quoted.
/// </summary>
private static byte[] ByteArrayToByteaTextHexFormat(byte[] nativeData, StringEncodingInfo encodingInfo)
{
int i = 0;
byte[] ret = new byte[
(encodingInfo.UseEPrefix ? 1 : 0) + // E prefix
(encodingInfo.Quote != 0 ? 2 : 0) + // quotes
encodingInfo.ByteaEscape.Length + // backslash[es]
1 + // x
(nativeData.Length * 2) // data
];
if (encodingInfo.Quote != 0)
{
if (encodingInfo.UseEPrefix)
{
ret[i++] = (byte)ASCIIBytes.E;
}
ret[i++] = encodingInfo.Quote;
}
foreach (byte bs in encodingInfo.ByteaEscape)
{
ret[i++] = bs;
}
ret[i++] = (byte)ASCIIBytes.x;
foreach (byte b in nativeData)
{
ret[i++] = hexEncodingByteMap[(b >> 4) & 0x0F];
ret[i++] = hexEncodingByteMap[b & 0x0F];
}
if (encodingInfo.Quote != 0)
{
ret[i++] = encodingInfo.Quote;
}
return(ret);
}
static BasicNativeToBackendTypeConverter()
{
stringEncodingInfoTable = new StringEncodingInfo[16];
// Hash value args: forExtendedQuery, UseConformantStrings, Supports_E_StringPrefix, arrayElement
// Note that a combination of UseConformantStrings == true and Supports_E_StringPrefix == false is not possible,
// so those combinations are left out of the table.
stringEncodingInfoTable[StringEncodingInfoHash(true, true, true, false)] = new StringEncodingInfo(0, "", "", "", true, false, backslashSingle);
stringEncodingInfoTable[StringEncodingInfoHash(true, true, true, true)] = new StringEncodingInfo((byte)ASCIIBytes.DoubleQuote, "", @"\", @"\", true, false, backslashDouble);
stringEncodingInfoTable[StringEncodingInfoHash(true, false, false, false)] = new StringEncodingInfo(0, "", "", "", false, false, backslashSingle);
stringEncodingInfoTable[StringEncodingInfoHash(true, false, false, true)] = new StringEncodingInfo((byte)ASCIIBytes.DoubleQuote, "", @"\", @"\", false, false, backslashDouble);
stringEncodingInfoTable[StringEncodingInfoHash(true, false, true, false)] = new StringEncodingInfo(0, "", "", "", false, false, backslashSingle);
stringEncodingInfoTable[StringEncodingInfoHash(true, false, true, true)] = new StringEncodingInfo((byte)ASCIIBytes.DoubleQuote, "", @"\", @"\", false, false, backslashDouble);
stringEncodingInfoTable[StringEncodingInfoHash(false, true, true, false)] = new StringEncodingInfo((byte)ASCIIBytes.SingleQuote, "'", "", "", true, false, backslashSingle);
stringEncodingInfoTable[StringEncodingInfoHash(false, true, true, true)] = new StringEncodingInfo((byte)ASCIIBytes.DoubleQuote, "'", @"\", @"\", true, false, backslashDouble);
stringEncodingInfoTable[StringEncodingInfoHash(false, false, false, false)] = new StringEncodingInfo((byte)ASCIIBytes.SingleQuote, "'", "", @"\", false, false, backslashDouble);
stringEncodingInfoTable[StringEncodingInfoHash(false, false, false, true)] = new StringEncodingInfo((byte)ASCIIBytes.DoubleQuote, "'", @"\\", @"\\\", false, false, backslashQuad);
stringEncodingInfoTable[StringEncodingInfoHash(false, false, true, false)] = new StringEncodingInfo((byte)ASCIIBytes.SingleQuote, "'", "", @"\", false, true, backslashDouble);
stringEncodingInfoTable[StringEncodingInfoHash(false, false, true, true)] = new StringEncodingInfo((byte)ASCIIBytes.DoubleQuote, "'", @"\\", @"\\\", false, false, backslashQuad);
}
/// <summary>
/// Binary data with possible older style octal escapes, quoted.
/// </summary>
private static byte[] ByteArrayToByteaTextEscaped(byte[] nativeData, StringEncodingInfo encodingInfo)
{
// Minimum length for output is input bytes + e-prefix + two quotes.
MemoryStream ret = new MemoryStream(nativeData.Length + (encodingInfo.UseEPrefix ? 1 : 0) + (encodingInfo.Quote != 0 ? 2 : 0));
if (encodingInfo.Quote != 0)
{
if (encodingInfo.UseEPrefix)
{
ret.WriteByte((byte)ASCIIBytes.E);
}
ret.WriteByte(encodingInfo.Quote);
}
foreach (byte b in nativeData)
{
if (b >= 0x20 && b < 0x7F && b != 0x22 && b != 0x27 && b != 0x5C)
{
ret.WriteByte(b);
}
else
{
ret
.WriteBytes(encodingInfo.ByteaEscape)
.WriteBytes(escapeEncodingByteMap[7 & (b >> 6)])
.WriteBytes(escapeEncodingByteMap[7 & (b >> 3)])
.WriteBytes(escapeEncodingByteMap[7 & b]);
}
}
if (encodingInfo.Quote != 0)
{
ret.WriteByte(encodingInfo.Quote);
}
return(ret.ToArray());
}