Class ADT.Struct

Description

Implements a struct which can be used for serialization and deserialization of data.

Example

class ID3 {
     inherit ADT.Struct;
     Item head = Chars(3);
     Item title = Chars(30);
     Item artist = Chars(30);
     Item album = Chars(30);
     Item year = Chars(4);
     Item comment = Chars(30);
     Item genre = Byte();
   }
   Stdio.File f = Stdio.File("foo.mp3");
   f->seek(-128);
   ADT.Struct tag = ID3(f);
   if(tag->head=="TAG") {
     write("Title: %s\n", tag->title);
     tag->title = "A new title" + "\0"*19;
     f->seek(-128);
     f->write( (string)tag );
   }

Example

class HollerithString {
     inherit ADT.Struct;
     Item strlen = Word();
     Item str = Chars(strlen);
   }

Method create

ADT.Struct ADT.Struct(void|string|Stdio.File data)

Parameter data

Data to be decoded and populate the struct. Can either be a file object or a string.