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Add NewFromUint64 constructor (#352)
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agmt authored Apr 8, 2024
1 parent 2fa107d commit 80ec940
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Showing 2 changed files with 41 additions and 8 deletions.
12 changes: 12 additions & 0 deletions decimal.go
Original file line number Diff line number Diff line change
Expand Up @@ -130,6 +130,18 @@ func NewFromInt32(value int32) Decimal {
}
}

// NewFromUint64 converts an uint64 to Decimal.
//
// Example:
//
// NewFromUint64(123).String() // output: "123"
func NewFromUint64(value uint64) Decimal {
return Decimal{
value: new(big.Int).SetUint64(value),
exp: 0,
}
}

// NewFromBigInt returns a new Decimal from a big.Int, value * 10 ^ exp
func NewFromBigInt(value *big.Int, exp int32) Decimal {
return Decimal{
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37 changes: 29 additions & 8 deletions decimal_test.go
Original file line number Diff line number Diff line change
Expand Up @@ -476,10 +476,11 @@ func TestNewFromFloatWithExponent(t *testing.T) {

func TestNewFromInt(t *testing.T) {
tests := map[int64]string{
0: "0",
1: "1",
323412345: "323412345",
9223372036854775807: "9223372036854775807",
0: "0",
1: "1",
323412345: "323412345",
9223372036854775807: "9223372036854775807",
-9223372036854775808: "-9223372036854775808",
}

// add negatives
Expand All @@ -501,10 +502,11 @@ func TestNewFromInt(t *testing.T) {

func TestNewFromInt32(t *testing.T) {
tests := map[int32]string{
0: "0",
1: "1",
323412345: "323412345",
2147483647: "2147483647",
0: "0",
1: "1",
323412345: "323412345",
2147483647: "2147483647",
-2147483648: "-2147483648",
}

// add negatives
Expand All @@ -524,6 +526,25 @@ func TestNewFromInt32(t *testing.T) {
}
}

func TestNewFromUint64(t *testing.T) {
tests := map[uint64]string{
0: "0",
1: "1",
323412345: "323412345",
9223372036854775807: "9223372036854775807",
18446744073709551615: "18446744073709551615",
}

for input, s := range tests {
d := NewFromUint64(input)
if d.String() != s {
t.Errorf("expected %s, got %s (%s, %d)",
s, d.String(),
d.value.String(), d.exp)
}
}
}

func TestNewFromBigIntWithExponent(t *testing.T) {
type Inp struct {
val *big.Int
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