The Annoyance Filter.pdf - Fourmilab

140 MAIL FOLDER ANNOYANCE-FILTER §168
168. Write the message transcript saved in tlist to the designated file name fname . If fname is “−”,
the transcript is written to standard output. Depending upon their provenance, transcripts may or may
not contain the POP3 line end terminator CR at the end of lines. We append the line feed, which
automatically provides the correct line termination for UNIX mail folders and the CR/LF required for
POP3 messages.
〈 Class implementations 11 〉 +≡
void mailFolder ::writeMessageTranscript (ostream &os ) const
{
assert(tlist ≠ Λ);
}
unsigned int n = tlist ⃗ size ( );
if ((n > 1) ∧ (tlist ⃗ back ( ).substr (0, (sizeof messageSentinel ) − 1) ≡ messageSentinel )) {
n−−;
}
list〈string〉::iterator p = tlist ⃗ begin ( );
for (unsigned int i = 0; i < n; i++) {
os ≪ ∗p++ ≪ endl ;
;
}
void mailFolder ::writeMessageTranscript (const string fname ) const
{
if (fname ≠ "−") {
ofstream of (fname .c str ( ));
writeMessageTranscript (of );
of .close ( );
}
else {
writeMessageTranscript (cout );
}
}