public SeraphArchive(ArcView arc, ArchiveFormat impl, ICollection <Entry> dir, ArchPacScheme scheme)
: base(arc, impl, dir)
{
EventDir = scheme.EventDir;
EventMap = scheme.EventMap;
}
// 3 @ ScnPac.Dat : FF 18 05 XX XX XX XX
// FF 16 05 XX XX XX XX
List <Entry> ReadIndex(ArcView file, ArchPacScheme scheme)
{
long index_offset = scheme.IndexOffset;
int base_count = file.View.ReadInt32(index_offset);
int file_count = file.View.ReadInt32(index_offset + 4);
index_offset += 8;
if (base_count <= 0 || base_count > 0x100 || !IsSaneCount(file_count))
{
return(null);
}
var base_offsets = new List <Tuple <uint, int> > (base_count);
int total_count = 0;
for (int i = 0; i < base_count; ++i)
{
uint offset = file.View.ReadUInt32(index_offset);
int count = file.View.ReadInt32(index_offset + 4);
if (count <= 0 || count > file_count || offset > file.MaxOffset)
{
return(null);
}
total_count += count;
if (total_count > file_count)
{
return(null);
}
base_offsets.Add(Tuple.Create(offset, count));
index_offset += 8;
}
if (total_count != file_count)
{
return(null);
}
var dir = new List <Entry> (file_count);
for (int j = base_count - 1; j >= 0; --j)
{
uint next_offset = file.View.ReadUInt32(index_offset);
index_offset += 4;
for (int i = 0; i < base_offsets[j].Item2; ++i)
{
var entry = new ArchEntry {
Name = FormatEntryName(j, i),
Type = "image",
DirIndex = (short)j,
FileIndex = (short)i,
Offset = next_offset,
};
next_offset = file.View.ReadUInt32(index_offset);
index_offset += 4;
if (next_offset < entry.Offset)
{
return(null);
}
entry.Size = (uint)(next_offset - entry.Offset);
entry.Offset += base_offsets[j].Item1;
if (!entry.CheckPlacement(file.MaxOffset))
{
return(null);
}
if (entry.Size > 0)
{
dir.Add(entry);
}
}
}
if (0 == dir.Count)
{
return(null);
}
return(dir);
}