public HPDF_Xref(int offset = 0)
{
LibLogger.Debug(this.GetType(), $"HPDF_Xref offset {offset}");
HPDF_Xref_Entry newEntry;
StartOffset = offset;
Entries = new List <HPDF_Xref_Entry>();
Addr = 0;
if (StartOffset == 0)
{
newEntry = new HPDF_Xref_Entry
{
EntryTyp = HPDF_FREE_ENTRY,
ByteOffset = 0,
GenNo = HPDF_Consts.HPDF_MAX_GENERATION_NUM,
Obj = null
};
Entries.Add(newEntry);
}
Trailer = new HPDF_Dict();
Error = new HPDF_Error();
}
public void HPDF_Xref_Add(HPDF_Object obj)
{
LibLogger.Debug(this.GetType(), "HPDF_Xref_Add");
if (obj == null)
{
Error = new HPDF_Error("HPDF_Xref_Add", HPDF_Error.HPDF_INVALID_OBJECT, 0);
}
var header = obj.Header;
if ((header.ObjId & HPDF_Obj_Header.HPDF_OTYPE_DIRECT) != 0 ||
(header.ObjId & HPDF_Obj_Header.HPDF_OTYPE_INDIRECT) != 0)
{
Error = new HPDF_Error("HPDF_Xref_Add", HPDF_Error.HPDF_INVALID_OBJECT, 0);
}
if (Entries.Count >= HPDF_Consts.HPDF_LIMIT_MAX_XREF_ELEMENT)
{
Error = new HPDF_Error("HPDF_Xref_Add", HPDF_Error.HPDF_XREF_COUNT_ERR, 0);
}
var entry = new HPDF_Xref_Entry
{
EntryTyp = HPDF_IN_USE_ENTRY,
ByteOffset = 0,
GenNo = 0,
Obj = obj
};
Entries.Add(entry);
header.ObjId = (uint)(StartOffset + Entries.Count - 1 + (int)HPDF_Obj_Header.HPDF_OTYPE_INDIRECT);
header.GenNo = entry.GenNo;
}
public HPDF_Xref_Entry HPDF_Xref_GetEntryByObjectId(uint objId)
{
LibLogger.Debug(this.GetType(), "HPDF_Xref_GetEntryByObjectId");
HPDF_Xref tmpXref = this;
while (tmpXref != null)
{
uint i;
if (tmpXref.Entries.Count + tmpXref.StartOffset > objId)
{
Error = new HPDF_Error("HPDF_Xref_GetEntryByObjectId", HPDF_Error.HPDF_INVALID_OBJ_ID, 0);
}
if (tmpXref.StartOffset < objId)
{
for (i = 0; i < tmpXref.Entries.Count; i++)
{
if (tmpXref.StartOffset + i == objId)
{
HPDF_Xref_Entry entry = tmpXref.HPDF_Xref_GetEntry((int)i);
return(entry);
}
}
}
tmpXref = tmpXref.Prev;
}
return(null);
}
