public override ILoadedImage Load(Address?addrLoad)
{
var rdr = new ByteImageReader(RawImage);
ReadHeader(rdr);
var archive = new ArArchive(this.ImageLocation);
ReadFiles(rdr, archive);
return(archive);
}
private void ReadFiles(ByteImageReader rdr, ArArchive archive)
{
for (; ;)
{
var header = ArFileHeader.Load(rdr);
if (header == null)
{
return;
}
ReadFile(header, rdr, archive);
}
}
private void ReadFile(ArFileHeader fileHeader, ByteImageReader rdr, ArArchive archive)
{
if (!int.TryParse(fileHeader.FileSize, out int dataSize))
{
throw new BadImageFormatException("Invalid archive file header.");
}
if (dataSize + rdr.Offset > rdr.Bytes.Length)
{
throw new BadImageFormatException("The archive file is corrupt.");
}
string name = fileHeader.Name;
if (name.StartsWith("// "))
{
throw new NotImplementedException("Extended file names not implemented yet.");
}
else if (name.StartsWith("/ ") || name.StartsWith("__.SYMDEF"))
{
// System V symbol lookup table.
var symbolData = rdr.ReadBytes(dataSize);
ReadSymbolTable(symbolData);
return;
}
else if (name.StartsWith("#1/ "))
{
// File name length follows #1/ as decimal digits.
// This variant is used by Mac and some versions of BSD.
var fileNameLength = Convert.ToInt32(name + 3);
long fileDataOffset = rdr.Offset + fileNameLength;
name = Encoding.ASCII.GetString(rdr.ReadBytes(fileNameLength));
if (dataSize > fileNameLength)
{
// The length of the name is included in the dataSize.
dataSize -= fileNameLength;
}
rdr.Offset = fileDataOffset;
}
else
{
// Ordinary short name
char[] charsToTrim = { '/', ' ' };
name = name.TrimEnd(charsToTrim);
}
archive.AddFile(name, (a, p, name) => new ArFile(a, p, name, rdr, rdr.Offset, dataSize));
rdr.Offset += dataSize;
AlignReader(rdr);
}