Can KyeFAT open files by filenumber?

Oldbitcollector (Jeff)

I'm fighting with what should be a simple routine. I'm attempting to open files by file number (a simple trick in fsrw) using the KyeFAT driver.

PUB openNextFile | i

    sd.listEntries("W")
    repeat i from 0 to fileNumber
        repeat while(buffer := sd.listEntries("N"))      
           str.copy(buffer,@filename)
           str.trimstring(@filename)
        i++
    'sd.openfile( @filename, "r")   

The idea here is to read the directory up to the "fileNumber", then open that file. Increasing/Decreasing "fileNumber" and re-running the routine should allow me to switch to the next file or the previous.

Can someone see where I'm going wrong here?

Thanks

Oldbitcollector (Jeff)

Overthinking it. Here's a working solution should someone turn this thread up later.

PUB openNextFile | i,data

    sd.listEntries("W")
    repeat fileNumber
         data := sd.listEntries("N")
                 
    data := sd.listEntries("N")
    trimString(data)

    sd.openfile( data, "r")           

PUB trimString(characters)

  result := ignoreSpace(characters)
  characters := (result + ((strsize(result) - 1) #> 0))

  repeat
    case byte[characters]
      8 .. 13, 32, 127: byte[characters--] := 0
      other: quit
PRI ignoreSpace(characters) ' 4 Stack Longs

  result := characters
  repeat strsize(characters--)
    case byte[++characters]
      8 .. 13, 32, 127:
      other: return characters