public override ArcFile TryOpen(ArcView file)
{
int count = file.View.ReadInt32(0);
if (!IsSaneCount(count) || file.MaxOffset >= ~0xC0000000)
{
return(null);
}
uint offset1 = file.View.ReadUInt32(0x14);
uint offset2 = file.View.ReadUInt32(0x20);
uint entry_size, next_offset;
if (4 + (uint)count * 0x14 == (offset1 & ~0xC0000000))
{
entry_size = 0x14;
next_offset = offset1;
}
else if (4 + (uint)count * 0x20 == (offset2 & ~0xC0000000))
{
entry_size = 0x20;
next_offset = offset2;
}
else
{
return(null);
}
uint index_size = entry_size * (uint)count;
if (index_size > file.View.Reserve(4, index_size))
{
return(null);
}
uint index_offset = 4;
uint size = file.View.ReadUInt32(index_offset + entry_size - 8);
offset2 = file.View.ReadUInt32(index_offset + (entry_size * 2) - 4);
if (size == (offset2 - next_offset)) // route2 archives shouldn't have entry size
{
return(null);
}
var dir = new List <Entry> (count);
for (int i = 0; i < count; ++i)
{
var name = file.View.ReadString(index_offset, entry_size - 4);
if (!IsValidEntryName(name))
{
return(null);
}
uint flags = next_offset >> 30;
Entry entry;
if (1 == flags || name.HasExtension(".iaf"))
{
entry = new Entry();
}
else
{
entry = new CgfEntry {
Flags = flags
}
};
entry.Name = name;
entry.Type = "image";
entry.Offset = next_offset & ~0xC0000000;
index_offset += entry_size;
next_offset = i + 1 == count ? (uint)file.MaxOffset : file.View.ReadUInt32(index_offset + entry_size - 4);
if (next_offset < entry.Offset)
{
return(null);
}
entry.Size = (next_offset & ~0xC0000000) - (uint)entry.Offset;
if (!entry.CheckPlacement(file.MaxOffset))
{
return(null);
}
dir.Add(entry);
}
return(new ArcFile(file, this, dir));
}
public override ArcFile TryOpen(ArcView file)
{
int count = file.View.ReadInt32(0);
if (!IsSaneCount(count) || file.MaxOffset >= ~0xC0000000)
{
return(null);
}
uint offset1 = file.View.ReadUInt32(0x14);
uint offset2 = file.View.ReadUInt32(0x20);
uint entry_size, next_offset;
if (4 + (uint)count * 0x14 == (offset1 & ~0xC0000000))
{
entry_size = 0x14;
next_offset = offset1;
}
else if (4 + (uint)count * 0x20 == (offset2 & ~0xC0000000))
{
entry_size = 0x20;
next_offset = offset2;
}
else
{
return(null);
}
uint index_size = entry_size * (uint)count;
if (index_size > file.View.Reserve(4, index_size))
{
return(null);
}
uint index_offset = 4;
var dir = new List <Entry> (count);
for (int i = 0; i < count; ++i)
{
var name = file.View.ReadString(index_offset, entry_size - 4);
uint flags = next_offset >> 30;
Entry entry;
if (1 == flags || name.EndsWith(".iaf", StringComparison.InvariantCultureIgnoreCase))
{
entry = new Entry();
}
else
{
entry = new CgfEntry {
Flags = flags
}
};
entry.Name = name;
entry.Type = "image";
entry.Offset = next_offset & ~0xC0000000;
index_offset += entry_size;
next_offset = i + 1 == count ? (uint)file.MaxOffset : file.View.ReadUInt32(index_offset + entry_size - 4);
if (next_offset < entry.Offset)
{
return(null);
}
entry.Size = (next_offset & ~0xC0000000) - (uint)entry.Offset;
if (!entry.CheckPlacement(file.MaxOffset))
{
return(null);
}
dir.Add(entry);
}
return(new ArcFile(file, this, dir));
}
public override ArcFile TryOpen(ArcView file)
{
int count = file.View.ReadInt32 (0);
if (!IsSaneCount (count) || file.MaxOffset >= ~0xC0000000)
return null;
uint offset1 = file.View.ReadUInt32 (0x14);
uint offset2 = file.View.ReadUInt32 (0x20);
uint entry_size, next_offset;
if (4+(uint)count*0x14 == (offset1 & ~0xC0000000))
{
entry_size = 0x14;
next_offset = offset1;
}
else if (4+(uint)count*0x20 == (offset2 & ~0xC0000000))
{
entry_size = 0x20;
next_offset = offset2;
}
else
return null;
uint index_size = entry_size * (uint)count;
if (index_size > file.View.Reserve (4, index_size))
return null;
uint index_offset = 4;
var dir = new List<Entry> (count);
for (int i = 0; i < count; ++i)
{
var name = file.View.ReadString (index_offset, entry_size-4);
uint flags = next_offset >> 30;
Entry entry;
if (1 == flags || name.EndsWith (".iaf", StringComparison.InvariantCultureIgnoreCase))
entry = new Entry();
else
entry = new CgfEntry { Flags = flags };
entry.Name = name;
entry.Type = "image";
entry.Offset = next_offset & ~0xC0000000;
index_offset += entry_size;
next_offset = i+1 == count ? (uint)file.MaxOffset : file.View.ReadUInt32 (index_offset+entry_size-4);
if (next_offset < entry.Offset)
return null;
entry.Size = (next_offset & ~0xC0000000) - (uint)entry.Offset;
if (!entry.CheckPlacement (file.MaxOffset))
return null;
dir.Add (entry);
}
return new ArcFile (file, this, dir);
}
