xn/Parser/XmlFragParser.cs
Dominic Höglinger 1899db4156 feat: implement ETG.2000-compatible CRC32 for XNeedle transforms
- Add SourceLocation struct (XNeedle namespace) with FilePath, Encoding,
  and LineNumber (-1 sentinel when unavailable)
- Add SLoc property to Context; Clone() propagates it for free
- Expose XmlRoundtripWriter.DetectEncoding as internal static
- Add XmlRoundtripWriter.CreateToString(filePath, encoding) returning a
  (writer, StringBuilder) tuple for in-memory style-preserving rendering
- Update XmlFragParser.ChecksumData to accept tagName only; use
  OpeningTagAnchor to skip the opening tag robustly, and AnyChar.Until()
  to non-greedily capture content through the closing tag
- Thread SourceLocation from Program.cs through Rule.Transform/Operate,
  refreshing LineNumber per node via IXmlLineInfo
- Implement ContextFunctions.crc: render node via CreateToString, extract
  digest slice via ChecksumData, encode with SLoc.Encoding, return CRC32
  as double for arithmetic compatibility

Clanker: claude-sonnet_4.6
2026-04-24 05:28:39 +02:00

25 lines
755 B
C#

using Sprache;
namespace XNeedle.Parser
{
public class XmlFragParser
{
public static Parser<string> OpeningTagAnchor(string tag)
{
return
from lbraket in Parse.Char('<')
from tagname in Parse.String(tag)
from any in Parse.CharExcept('>').Many()
from rbraket in Parse.Char('>')
select new string([.. any]);
}
public static Parser<string> ChecksumData(string tagName)
{
var closing = "</" + tagName + ">";
return
from preamble in OpeningTagAnchor(tagName)
from content in Parse.AnyChar.Until(Parse.String(closing))
select new string([.. content]) + closing;
}
}
}