static bool IsSameTextAsCurrentSnapshot(ITextSnapshot snapshot, string text)
{
if (snapshot.Length != text.Length)
{
return(false);
}
if (text.Length == 0)
{
return(true);
}
int mid = text.Length / 2;
if (snapshot[mid] != text[mid])
{
return(false);
}
var buf = new char[Math.Min(1024, text.Length)];
int offset = 0;
while (offset < text.Length)
{
int count = Math.Min(buf.Length, text.Length - offset);
snapshot.CopyTo(offset, buf, 0, count);
for (int i = 0, j = offset; i < count; i++, j++)
{
if (buf[i] != text[j])
{
return(false);
}
}
offset += count;
}
return(true);
}
int NextChar()
{
if (bufferPos >= bufferLen)
{
int len = snapshotLength - snapshotPos;
if (len == 0)
{
return(-1);
}
if (len > buffer.Length)
{
len = buffer.Length;
}
snapshot.CopyTo(snapshotPos, buffer, 0, len);
bufferLen = len;
bufferPos = 0;
}
snapshotPos++;
return(buffer[bufferPos++]);
}
public override int Read(char[] buffer, int index, int count)
{
int length = End - _position;
if (length > 0)
{
length = System.Math.Min(length, count);
_snapshot.CopyTo(_position, buffer, index, length);
_position += length;
}
return(length);
}
public override void CopyTo(int sourceIndex, char[] destination, int destinationIndex, int count)
{
textSnapshot.CopyTo(sourceIndex, destination, destinationIndex, count);
}
