Re: [Bitpim-devel] Offsets in media location tables

[Roger B. <ro...@ro...>]

Stephen Wood wrote:
> In the LG phones, the ringtone and image location maps have offsets.
> Are these offsets arbitrarily chosen for convenience, or are they
> properties of the phone?

The index files look like this:

  2 UINT numentries
  *  LIST entries:
      2 UINT id
     50 STRING name  # different number of bytes on each model

The overal file is a fixed number of entries long (typically 20 or
30).  The id is what is used in the phonebook etc to refer to that
entry.   Entries with an id of -1/0xffff are unused.  This does
mean that the numentries field and the number of entries with
a valid id could differ.

When you delete something on the phone, it usually just changes that
entry to have an id of -1/0xffff.  Consequently you have "holes"
in the entries.

When writing a new index file out, the code always writes them
in id order.  No holes are left.  New entries are given the
lowest free id number.

Roger