/// <summary>Writes an Int64 at the end, and advance the cursor</summary>
/// <param name="writer">Target buffer</param>
/// <param name="value">Signed QWORD, 64 bits, High Endian</param>
public static void WriteInt64(ref SliceWriter writer, long value)
{
if (value <= 255)
{
if (value == 0)
{ // zero
writer.WriteByte(FdbTupleTypes.IntZero);
return;
}
if (value > 0)
{ // 1..255: frequent for array index
writer.WriteByte2(FdbTupleTypes.IntPos1, (byte)value);
return;
}
if (value > -256)
{ // -255..-1
writer.WriteByte2(FdbTupleTypes.IntNeg1, (byte)(255 + value));
return;
}
}
WriteInt64Slow(ref writer, value);
}
/// <summary>Writes a char array encoded in UTF-8</summary>
internal static unsafe void WriteChars(ref SliceWriter writer, char[] value, int offset, int count)
{
Contract.Requires(offset >= 0 && count >= 0);
if (count == 0)
{
if (value == null)
{ // "00"
writer.WriteByte(FdbTupleTypes.Nil);
}
else
{ // "02 00"
writer.WriteByte2(FdbTupleTypes.Utf8, 0x00);
}
}
else
{
fixed(char *chars = value)
{
if (TryWriteUnescapedUtf8String(ref writer, chars + offset, count))
{
return;
}
}
// the string contains \0 chars, we need to do it the hard way
WriteNulEscapedBytes(ref writer, FdbTupleTypes.Utf8, Encoding.UTF8.GetBytes(value, 0, count));
}
}
/// <summary>Writes an UInt8 at the end, and advance the cursor</summary>
/// <param name="writer">Target buffer</param>
/// <param name="value">Unsigned BYTE, 32 bits</param>
public static void WriteInt8(ref SliceWriter writer, byte value)
{
if (value == 0)
{ // zero
writer.WriteByte(FdbTupleTypes.IntZero);
}
else
{ // 1..255: frequent for array index
writer.WriteByte2(FdbTupleTypes.IntPos1, value);
}
}
/// <summary>Writes an UInt64 at the end, and advance the cursor</summary>
/// <param name="writer">Target buffer</param>
/// <param name="value">Signed QWORD, 64 bits, High Endian</param>
public static void WriteUInt64(ref SliceWriter writer, ulong value)
{
if (value <= 255)
{
if (value == 0)
{ // 0
writer.WriteByte(FdbTupleTypes.IntZero);
}
else
{ // 1..255
writer.WriteByte2(FdbTupleTypes.IntPos1, (byte)value);
}
}
else
{ // >= 256
WriteUInt64Slow(ref writer, value);
}
}
/// <summary>Writes a string encoded in UTF-8</summary>
public static unsafe void WriteString(ref SliceWriter writer, string value)
{
if (value == null)
{ // "00"
writer.WriteByte(FdbTupleTypes.Nil);
}
else if (value.Length == 0)
{ // "02 00"
writer.WriteByte2(FdbTupleTypes.Utf8, 0x00);
}
else
{
fixed(char *chars = value)
{
if (!TryWriteUnescapedUtf8String(ref writer, chars, value.Length))
{ // the string contains \0 chars, we need to do it the hard way
WriteNulEscapedBytes(ref writer, FdbTupleTypes.Utf8, Encoding.UTF8.GetBytes(value));
}
}
}
}