func fibber(c chan *big.Int, out chan string, n int64) {
// Keep the fibbers in dedicated operating system
// threads, so that this program tests coordination
// between pthreads and not just goroutines.
runtime.LockOSThread()
i := big.NewInt(n)
if n == 0 {
c <- i
}
for {
j := <-c
out <- j.String()
i.Add(i, j)
c <- i
}
}
*
* contributed by The Go Authors.
* based on pidigits.c (by Paolo Bonzini & Sean Bartlett,
* modified by Michael Mellor)
*/
package main
import (
"fmt"
big "gmp"
"runtime"
)
var (
tmp1 = big.NewInt(0)
tmp2 = big.NewInt(0)
numer = big.NewInt(1)
accum = big.NewInt(0)
denom = big.NewInt(1)
ten = big.NewInt(10)
)
func extractDigit() int64 {
if big.CmpInt(numer, accum) > 0 {
return -1
}
tmp1.Lsh(numer, 1).Add(tmp1, numer).Add(tmp1, accum)
big.DivModInt(tmp1, tmp2, tmp1, denom)
tmp2.Add(tmp2, numer)
if big.CmpInt(tmp2, denom) >= 0 {