private void WriteEscapedString(string value)
{
EnsureWriteBuffer();
var bufferPool = _arrayPool;
if (value != null)
{
int lastWritePosition = 0;
for (int i = 0; i < value.Length; i++)
{
var c = value[i];
if (c < _charEscapeFlags.Length && !_charEscapeFlags[c])
{
continue;
}
string escapedValue = null;
if (c < _charEscapeFlags.Length)
{
escapedValue = $"{Grammar.ReleaseCharacter.Value}{c}";
}
else
{
escapedValue = null;
}
if (escapedValue == null)
{
continue;
}
if (i > lastWritePosition)
{
int length = i - lastWritePosition;
int start = 0;
if (_writeBuffer == null || _writeBuffer.Length < length)
{
char[] newBuffer = BufferUtils.RentBuffer(bufferPool, length);
BufferUtils.ReturnBuffer(bufferPool, _writeBuffer);
_writeBuffer = newBuffer;
}
value.CopyTo(lastWritePosition, _writeBuffer, start, length - start);
// write unchanged chars before writing escaped text
_writer.Write(_writeBuffer, start, length - start);
}
lastWritePosition = i + 1;
_writer.Write(escapedValue);
}
if (lastWritePosition == 0)
{
// no escaped text, write entire string
_writer.Write(value);
}
else
{
int length = value.Length - lastWritePosition;
if (_writeBuffer == null || _writeBuffer.Length < length)
{
_writeBuffer = BufferUtils.EnsureBufferSize(bufferPool, length, _writeBuffer);
}
value.CopyTo(lastWritePosition, _writeBuffer, 0, length);
// write remaining text
_writer.Write(_writeBuffer, 0, length);
}
}
else
{
WriteNull();
}
}
