[cups.general] question about charset

[Jerome Alet]

Hi there,

while writing my own backend, I'm wondering about the charset
used to encode the title and filename arguments (and possibly
the other ones).

Is this the same as the one available in the CHARSET environment
variable made available by CUPS to its subprocesses or not ?

Does this charset come from the printing client or from the
server's configuration or startup environment ?

Is it always valid when the client is a Windows box printing 
directly over IPP ? or through Samba ?

Thanks in advance

Jerome Alet