RB-TridLib

Realbasic glue code for TridLib, which is a tool for guessing file formats by analyzing patterns in the file data. TridLib is available on Win32 only.

Prerequisites

The TridLib.dll and TridDefs.trd files must be located in the same directory as your app's executable.

Basic usage

The TridLib module provides an extension method for folderitems:

Function TrIDTypes(Extends f As FolderItem) As TridLib.FileType()

To get a list of probable file types for a folderitem, use this method to get an array of TridLib.FileType objects. These objects have no methods and are merely containers for the filetype data.

For example:

  Dim item As FolderItem ' assume a valid FolderItem
  Dim t() As TridLib.FileType = item.TrIDTypes()
  For Each type As TridLib.FileType In t
    MsgBox(type.Description + "(" + type.Extension + ")" + Format(type.Points, "###,###,##0.0#"))
  Next

Advanced usage

The TridLib module has a number of protected functions which allow low-level access to TridLib should you need to do something not supported by the TrIDTypes method discussed above. These methods are:

• Analyze() As Integer: Performs the analysis on a previously submitted file.
• DefCount() As Integer: The total number of file format definitions known.
• GetInfo(InfoType As Integer, InfoIndex As Integer, Output As MemoryBlock = Nil) As Integer: Retrieves data about the most recently analyzed file.
• LoadDefsPack(Directory As FolderItem) As Integer: Loads the file named TridDefs.trd from the specified directory. Returns the number of definitions loaded.
• SetDefsPack(RawDefData As MemoryBlock) As Integer: Loads file format definitions from memory. This is only available in paid versions of TridLib.dll. Returns the number of definitions loaded.
• SubmitFile(File As FolderItem) As Integer: Prepares a new file for analysis.
• Version() As Integer: The version number of TridLib.dll.