math/big: add SetUint64 and Uint64 functions to *Int
Implementation is mostly identical to passing a non-negative int64 to
SetInt64, and calling Int64 with a non-negative value in the *Int.
Fixes #4389.
R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/6929048
diff --git a/src/pkg/math/big/int_test.go b/src/pkg/math/big/int_test.go
index d3c5a0e..fd6d152 100644
--- a/src/pkg/math/big/int_test.go
+++ b/src/pkg/math/big/int_test.go
@@ -1135,6 +1135,36 @@
}
}
+var uint64Tests = []uint64{
+ 0,
+ 1,
+ 4294967295,
+ 4294967296,
+ 8589934591,
+ 8589934592,
+ 9223372036854775807,
+ 9223372036854775808,
+ 18446744073709551615, // 1<<64 - 1
+}
+
+func TestUint64(t *testing.T) {
+ in := new(Int)
+ for i, testVal := range uint64Tests {
+ in.SetUint64(testVal)
+ out := in.Uint64()
+
+ if out != testVal {
+ t.Errorf("#%d got %d want %d", i, out, testVal)
+ }
+
+ str := fmt.Sprint(testVal)
+ strOut := in.String()
+ if strOut != str {
+ t.Errorf("#%d.String got %s want %s", i, strOut, str)
+ }
+ }
+}
+
var bitwiseTests = []struct {
x, y string
and, or, xor, andNot string
