From 19b27aafdc874ad21d3240f0220b3f3fdc941409 Mon Sep 17 00:00:00 2001
From: Egor Seredin <4819888+agmt@users.noreply.github.com>
Date: Tue, 13 Feb 2024 06:52:50 +0000
Subject: [PATCH] Add NewFromUint64

---
 decimal.go      | 12 ++++++++++++
 decimal_test.go | 19 +++++++++++++++++++
 2 files changed, 31 insertions(+)

diff --git a/decimal.go b/decimal.go
index e73b379..e91bcd4 100644
--- a/decimal.go
+++ b/decimal.go
@@ -116,6 +116,18 @@ 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{
diff --git a/decimal_test.go b/decimal_test.go
index 17d4627..92e5348 100644
--- a/decimal_test.go
+++ b/decimal_test.go
@@ -524,6 +524,25 @@ 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