private static GrfItem Create
(
GrfArchive grf,
string name,
int compressedLength,
int compressedLengthAligned,
int realLength,
GrfFileFlags flags,
int position
)
{
GrfItem ret;
if (IsDirectory(compressedLength, compressedLengthAligned, realLength, flags, position))
{
ret = new GrfDirectoryInfo();
}
else
{
ret = new GrfFileInfo();
}
ret.m_Grf = grf;
ret.m_Name = FilenameEncoding.Encode(name);
ret.m_AlignedCompressedLength = compressedLengthAligned;
ret.m_CompressedLength = compressedLength;
ret.m_Length = realLength;
ret.m_Flags = flags;
ret.m_Position = position;
ret.m_Hash = NameHash(ret.m_Name);
return(ret);
}
internal GrfFileInfo(GrfArchive grf, string name, GrfFileFlags flags, byte[] data)
{
m_Grf = grf;
m_Flags = flags;
m_Name = FilenameEncoding.Encode(name);
m_Hash = NameHash(m_Name);
Data = data;
}
internal GrfDirectoryInfo(GrfArchive grf, string name, GrfFileFlags flags)
{
m_Grf = grf;
m_Flags = flags;
m_Name = FilenameEncoding.Encode(name);
m_Hash = NameHash(m_Name);
m_AlignedCompressedLength = GRFFILE_DIR_SZFILE;
m_CompressedLength = GRFFILE_DIR_SZSMALL;
m_Length = GRFFILE_DIR_SZORIG;
m_Position = GRFFILE_DIR_OFFSET;
}
/// <summary>
/// Creates a hash from a filename.
/// </summary>
/// <param name="name">The filename.</param>
/// <returns>A hash from the specified filename.</returns>
public static uint NameHash(string name)
{
uint tmp = 0;
name = FilenameEncoding.Encode(name);
for (int i = 0; i < name.Length; i++)
{
tmp = (tmp << 5) + tmp + name.ToUpper()[i];
}
return(tmp);
}