public PdfIndirectObject ReadObject(IPdfStreamReader streamReader, IPdf pdf, CrossReferencePartSubSectionEntry entry)
{
streamReader.Seek(entry.Offset, SeekOrigin.Begin);
var result = this.ReadObject(streamReader, pdf);
if (result is PdfIndirectObject indirectObject)
{
return(indirectObject);
}
throw new InvalidDataException("Expected object is not an indirect object.");
}
public CrossReferencePartSubSection ReadPart(PdfStreamReader streamReader, IPdf pdf)
{
var line = streamReader.ReadLine();
var fields = line.Split(' ');
if (fields.Length != 2)
{
throw new ArgumentOutOfRangeException(nameof(streamReader), line, "Invalid field count for subsection counts.");
}
if (!int.TryParse(fields[0], out var startingObject))
{
throw new ArgumentOutOfRangeException(nameof(streamReader), line, "Invalid starting object field. Not a valid number.");
}
if (!int.TryParse(fields[1], out var objectCount))
{
throw new ArgumentOutOfRangeException(nameof(streamReader), line, "Invalid object count. Not a valid number.");
}
var entries = new CrossReferencePartSubSectionEntry[objectCount];
for (var i = 0; i < entries.Length; i++)
{
var entry = this._partReader.ReadPart(streamReader, pdf);
entry.ObjectNumber = startingObject + i;
entries[i] = entry;
}
var result = new CrossReferencePartSubSection
{
Entries = entries,
StartingObject = startingObject
};
return(result);
}
public PdfIndirectObject ReadIndirectObject(CrossReferencePartSubSectionEntry entry) => this.PdfReader.ReadObject(this.PdfStreamReader, this, entry);
public PdfIndirectObject PeekReadObject(IPdfStreamReader streamReader, IPdf pdf, CrossReferencePartSubSectionEntry entry)
{
var originalOffset = streamReader.Position;
var result = this.ReadObject(streamReader, pdf, entry);
streamReader.Seek(originalOffset, SeekOrigin.Begin);
return(result);
}
