/// <summary>
/// Split a <see cref="String"/> or <see cref="PhpBytes"/> to "upto" bytes at left and the rest or <c>null</c> at right.
/// </summary>
private static void SplitData(TextElement data, int upto, out TextElement left, out TextElement right)
{
Debug.Assert(upto >= 0);
//if (this.IsText)
if (data.IsText)
{
string s = data.GetText();
if (upto < s.Length - 1)
{
left = new TextElement(s.Substring(0, upto + 1));
right = new TextElement(s.Substring(upto + 2));
}
else
{
left = data;
right = TextElement.Null;
}
}
else
{
Debug.Assert(data.IsBinary);
var bin = data.GetBytes();
if (upto < bin.Length - 1)
{
byte[] l = new byte[upto + 1], r = new byte[bin.Length - upto - 1];
Array.Copy(bin, 0, l, 0, upto + 1);
Array.Copy(bin, upto + 1, r, 0, bin.Length - upto - 1);
left = new TextElement(l);
right = new TextElement(r);
}
else
{
left = data;
right = TextElement.Null;
}
}
}
/// <summary>
/// Finds the '\n' in a string or PhpBytes and returns its offset or <c>-1</c>
/// if not found.
/// </summary>
/// <param name="data">Data to scan.</param>
/// <param name="from">Index of the first character to scan.</param>
/// <returns></returns>
private static int FindEoln(TextElement data, int from)
{
Debug.Assert(!data.IsNull);
if (data.IsText)
{
return data.GetText().IndexOf('\n', from);
}
else
{
Debug.Assert(data.IsBinary);
return Array.IndexOf(data.GetBytes(), (byte)'\n', from);
}
}