mkhaw@teknowledge-vaxc.ARPA (Mike Khaw) (10/05/88)
The algorithm used by the vn newsreader to (un)rot13 doesn't work
correctly for every character. Specifically, I find that "k" and
"m" get mapped to non-printing characters.
I replaced vn's algorithm with the one used by rn. The fix is really
too short for a patch. Just replace the rot_line() function in reader.c
with the following version:
<--- cut here --->
static
rot_line (s)
unsigned char *s;
{
/* short circuit if no rot */
if (Rot == 0)
return;
for ( ; *s != '\0'; ++s)
{
/* adapted from rn's rot algorithm */
*s += isalpha(*s) ? ((*s & 31) <= 13) ? Rot : -Rot : 0;
}
}
<--- cut here --->
Mike Khaw
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