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(ArcOpener): allow zero-length entries.

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morkt 2015-11-09 00:08:55 +04:00
parent bccc8303ae
commit 85282b82d9
1 changed files with 8 additions and 3 deletions
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7
ArcFormats/RPM/ArcARC.cs
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@ -125,8 +125,11 @@ namespace GameRes.Formats.Rpm
entry.Size = LittleEndian.ToUInt32 (index, index_offset+4); entry.Size = LittleEndian.ToUInt32 (index, index_offset+4);
entry.Offset = LittleEndian.ToUInt32 (index, index_offset+8); entry.Offset = LittleEndian.ToUInt32 (index, index_offset+8);
entry.IsPacked = is_compressed != 0; entry.IsPacked = is_compressed != 0;
if (0 != entry.Size)
{
if (entry.Offset < data_offset || !entry.CheckPlacement (file.MaxOffset)) if (entry.Offset < data_offset || !entry.CheckPlacement (file.MaxOffset))
return null; return null;
}
dir.Add (entry); dir.Add (entry);
index_offset += 12; index_offset += 12;
} }
@ -135,6 +138,8 @@ namespace GameRes.Formats.Rpm
public override Stream OpenEntry (ArcFile arc, Entry entry) public override Stream OpenEntry (ArcFile arc, Entry entry)
{ {
if (0 == entry.Size)
return Stream.Null;
var input = arc.File.CreateStream (entry.Offset, entry.Size); var input = arc.File.CreateStream (entry.Offset, entry.Size);
var packed = entry as PackedEntry; var packed = entry as PackedEntry;
if (null == packed || !packed.IsPacked) if (null == packed || !packed.IsPacked)
@ -144,7 +149,7 @@ namespace GameRes.Formats.Rpm
EncryptionScheme GuessScheme (ArcView file, int count) EncryptionScheme GuessScheme (ArcView file, int count)
{ {
int[] possible_sizes = { 32, 24 }; int[] possible_sizes = { 0x20, 0x18 };
byte[] first_entry = new byte[possible_sizes[0] + 12]; byte[] first_entry = new byte[possible_sizes[0] + 12];
if (first_entry.Length != file.View.Read (8, first_entry, 0, (uint)first_entry.Length)) if (first_entry.Length != file.View.Read (8, first_entry, 0, (uint)first_entry.Length))
return null; return null;