public StarDictIdx(StarDictInfo info, Encoding enc = null)
{
this.encoding = enc ?? Encoding.UTF8;
this.offsetSize = info.PointerSize;
var fname = info.BaseName + ".idx";
if (File.Exists(fname))
{
this.table = new TxtHeteroIdxTable(fname, this.MeasureEntryLength);
}
else
{
this.table = new StrHeteroIdxTable(fname + ".gz", this.MeasureEntryLength);
}
// create and populate the index of index
this.indexIndex = new int[info.NumberOfEntries + 1];
for (int cnt = 1, offset = 0; cnt < info.NumberOfEntries; ++cnt)
{
this.indexIndex[cnt] = offset = this.table.FindNext(offset);
}
this.indexIndex[info.NumberOfEntries] = info.IndexFileSize; // last sentry
}
private int MeasureEntryLength(HeteroIdxTable tbl)
{
for (var cnt = 0;; ++cnt)
{
if (tbl.ReadByte() == 0)
{
return(cnt + 1 + this.AddressSize); // '\0' + sizeof(offsetPtr) + 4 bytes size
}
}
}
