Detect-It-Easy/db/ACE

// Detect an ACE archive.
// Author: Jason Hood <jadoxa@yahoo.com.au>
/*
   Only tested with 2.04.
*/

includeScript("archive");
sName="ACE";

function detect_ACE(bFile,bShowOptions)
{
    var nOffset,nSize;
    if(bFile)
    {
        nOffset=0;
        nSize=File.getSize();
    }
    else
    {
        nOffset=File.getOverlayOffset();
        nSize=File.getOverlaySize();
    }
    if(nSize>48)
    {
        if(File.compare("'**ACE**'",nOffset+7))
        {
            bDetected=1;
            sVersion="2";
            if(File.readByte(nOffset+6)&0x80)
            {
                sOptions="solid";
            }
            if(File.compare("'UNREGISTERED'",nOffset+32))
            {
                sOptions=sOptions.append("unregistered");
            }
            if(bShowOptions)
            {
                // Not sure about this...
                var nOffset=File.findSignature(nOffset+0x20,128,"000101");
                if(nOffset!=-1)
                {
                    nOffset-=3;
                    while(nOffset<File.getSize())
                    {
                        var nPacked=File.readDword(nOffset+7);
                        Archive.add(File.readDword(nOffset+11),nPacked,
                                    File.readByte(nOffset+19)&16);
                        nOffset+=0x23+File.readWord(nOffset+0x21)+nPacked;
                    }
                    sOptions=sOptions.append(Archive.contents());
                }
            }
        }
    }
}