Wednesday, March 17, 2010

Sansa Clip and Karmic

Upon upgrade to Karmic Koala Ubuntu (9.10), my trusty Sansa Clip player was not autodetecting like it did under the Ubuntu distribution I was previously using. So I scoured the web and found this site which gives a workaround: when the Sansa Clip is disconnected, go to Settings->USB Mode on the Sansa Clip and set it to MSC. It should now present itself to the computer as a normal file system. Unless, of course, the file system is screwed up, in which case you'll have to go to Settings->Format and format the Sansa Clip drive before connecting it again.

Friday, March 05, 2010

Funny C tricks

Taken from Bill Rowan's Stanford ACM presentation:

The "downto" operator:

int main()
int i = 5;
while(i --> 0) // --> is the downto operator!
printf("%d\n", i);
return 0;

Cast any type to "bool" type (that is, 1 or 0):
"Computed goto" (compiler-dependent && unary operator):
void print_loop(int s, int e) {
assert(s < e);
printf("%d\n", s);
goto *( &&top + ( !!(s++/e) ) * ( &&end - &&top ) );