Dump substructure offsets from objects parsed by Kaitai Struct

kaitai-dump-offsets.py

# This function recurively traverses a KaitaiStruct objects and dumps the offsets of the substructures encountered.
#
# This is similar to how the WebIDE points you to specific substructers in the parsed tree when you click on some
# byte in the hex editor. 
# Unfortunately I couldn't use any IDE tools for this capability, because [JavaScript sucks](https://github.com/kaitai-io/kaitai_struct/issues/183)

# You should generate the Kaitai parser with the `--read-pos` command line option
# The behavior is documented with this issue: https://github.com/kaitai-io/kaitai_struct/issues/331
import string

l=[] # dummy list, see below

def dump(obj, depth=0):
    if isinstance(obj, list):
        for o in obj:
            dump(o, depth+1)
        return
    fields = [f for f in dir(obj) if (f[0] in string.ascii_lowercase) or f.startswith("_m_")]
    for f  in fields:    
        l.append(getattr(obj,f)) # We need this so the @property method gets actually executed
        try: 
            dbg = obj._debug[f]
            if "start" not in obj._debug[f]:
                dbg = obj._debug["_m_"+f] 
            print("%s- (%04x - %04x) %s" % (".."*depth, dbg["start"], dbg["end"], repr(obj)+"#"+f))
            dump(getattr(obj, f), depth+1)
        except AttributeError:
            pass
        except KeyError:
            # print("-- Key miss at %s %s --" % (obj, f))
            pass