Irssi now uses 64bit file offets if it's only supported by system. Also did

a few changes to DCC so that it should be possible to send >4GB files.

DCC protocol uses 32bit "n bytes transferred" notifications, so I had to
bend the protocol a bit to allow 64bit files by truncating the value to
lowest 32bits. I'm not sure how other clients handle those notifications,
but irssi uses it only to figure out when the DCC SEND transfer is complete,
so it's quite safe to assume that if we've managed to write() all the bytes
and we receive the last 32bit of file size, it means the total file size
instead of the total - (n+1)*4GB.


git-svn-id: http://svn.irssi.org/repos/irssi/trunk@3018 dbcabf3a-b0e7-0310-adc4-f8d773084564

src/core/misc.h

@@ -85,6 +85,9 @@ char *replace_chars(char *str, char from, char to);
 int octal2dec(int octal);
 int dec2octal(int decimal);
 
+/* string -> uoff_t */
+uoff_t str_to_uofft(const char *str);
+
 /* convert all low-ascii (<32) to ^<A..> combinations */
 char *show_lowascii(const char *channel);