public override IDataFormat CreateDataFormat(IDataModel data, int index)
{
var destinationAddress = data.ReadPointer(Start);
var anchor = data.GetAnchorFromAddress(Start, destinationAddress);
var pointer = new Pointer(Start, index - Start, destinationAddress, anchor);
return(pointer);
}
public override IDataFormat CreateDataFormat(IDataModel data, int index)
{
var offsets = ConvertByteOffsetToArrayOffset(index);
var currentSegment = ElementContent[offsets.SegmentIndex];
if (currentSegment.Type == ElementContentType.PCS)
{
if (currentCachedStartIndex != offsets.SegmentStart || currentCachedIndex > offsets.SegmentOffset)
{
currentCachedStartIndex = offsets.SegmentStart;
currentCachedIndex = offsets.SegmentOffset;
cachedCurrentString = PCSString.Convert(data, offsets.SegmentStart, currentSegment.Length);
}
return(PCSRun.CreatePCSFormat(data, offsets.SegmentStart, index, cachedCurrentString));
}
var position = index - offsets.SegmentStart;
if (currentSegment.Type == ElementContentType.Integer)
{
if (currentSegment is ArrayRunEnumSegment enumSegment)
{
var value = enumSegment.ToText(data, index);
return(new IntegerEnum(offsets.SegmentStart, position, value, currentSegment.Length));
}
else
{
var value = ArrayRunElementSegment.ToInteger(data, offsets.SegmentStart, currentSegment.Length);
return(new Integer(offsets.SegmentStart, position, value, currentSegment.Length));
}
}
if (currentSegment.Type == ElementContentType.Pointer)
{
var destination = data.ReadPointer(offsets.SegmentStart);
var destinationName = data.GetAnchorFromAddress(offsets.SegmentStart, destination);
return(new Pointer(offsets.SegmentStart, position, destination, destinationName));
}
if (currentSegment.Type == ElementContentType.BitArray)
{
return(new BitArray(offsets.SegmentStart, position, currentSegment.Length));
}
throw new NotImplementedException();
}
private ArrayRun(IDataModel data, string format, int start, IReadOnlyList <int> pointerSources) : base(start, pointerSources)
{
owner = data;
FormatString = format;
SupportsPointersToElements = format.StartsWith(AnchorStart.ToString());
if (SupportsPointersToElements)
{
format = format.Substring(1);
}
var closeArray = format.LastIndexOf(ArrayEnd.ToString());
if (!format.StartsWith(ArrayStart.ToString()) || closeArray == -1)
{
throw new ArrayRunParseException($"Array Content must be wrapped in {ArrayStart}{ArrayEnd}.");
}
var segments = format.Substring(1, closeArray - 1);
var length = format.Substring(closeArray + 1);
ElementContent = ParseSegments(segments, data);
if (ElementContent.Count == 0)
{
throw new ArrayRunParseException("Array Content must not be empty.");
}
ElementLength = ElementContent.Sum(e => e.Length);
FormatMatchFlags flags = default;
if (ElementContent.Count == 1)
{
flags |= FormatMatchFlags.IsSingleSegment;
}
if (length.Length == 0)
{
var nextRun = owner.GetNextAnchor(Start + ElementLength);
for (; true; nextRun = owner.GetNextAnchor(nextRun.Start + nextRun.Length))
{
if (nextRun.Start > owner.Count)
{
break;
}
var anchorName = owner.GetAnchorFromAddress(-1, nextRun.Start);
if (string.IsNullOrEmpty(anchorName))
{
continue;
}
if ((nextRun.Start - Start) % ElementLength != 0)
{
break;
}
}
var byteLength = 0;
var elementCount = 0;
while (Start + byteLength + ElementLength <= nextRun.Start && DataMatchesElementFormat(owner, Start + byteLength, ElementContent, flags, nextRun))
{
byteLength += ElementLength;
elementCount++;
if (elementCount == 100)
{
flags |= FormatMatchFlags.AllowJunkAfterText;
}
}
LengthFromAnchor = string.Empty;
ElementCount = Math.Max(1, elementCount); // if the user said there's a format here, then there is, even if the format it wrong.
FormatString += ElementCount;
}
else if (int.TryParse(length, out int result))
{
// fixed length is easy
LengthFromAnchor = string.Empty;
ElementCount = Math.Max(1, result);
}
else
{
LengthFromAnchor = length;
ElementCount = Math.Max(1, ParseLengthFromAnchor());
}
Length = ElementLength * ElementCount;
}
