Generate toString implementation for unsigned types

libraries/stdlib/unsigned/src/kotlin/UByte.kt

@@ -123,6 +123,8 @@ public inline class UByte internal constructor(private val data: Byte) : Compara
     public fun toUInt(): UInt = data.toUInt()
     public fun toULong(): ULong = data.toULong()
 
+    public override fun toString(): String = toInt().toString()
+
 }
 
 public fun Byte.toUByte(): UByte = UByte(this)

libraries/stdlib/unsigned/src/kotlin/UInt.kt

@@ -127,6 +127,8 @@ public inline class UInt internal constructor(private val data: Int) : Comparabl
     public fun toUInt(): UInt = this
     public fun toULong(): ULong = data.toULong()
 
+    public override fun toString(): String = toLong().toString()
+
 }
 
 public fun Byte.toUInt(): UInt = UInt(this.toInt() and 0xFF)

libraries/stdlib/unsigned/src/kotlin/ULong.kt

@@ -127,6 +127,8 @@ public inline class ULong internal constructor(private val data: Long) : Compara
     public fun toUInt(): UInt = data.toUInt()
     public fun toULong(): ULong = this
 
+    public override fun toString(): String = ulongToString(data)
+
 }
 
 public fun Byte.toULong(): ULong = ULong(this.toLong() and 0xFF)

libraries/stdlib/unsigned/src/kotlin/UShort.kt

@@ -123,6 +123,8 @@ public inline class UShort internal constructor(private val data: Short) : Compa
     public fun toUInt(): UInt = data.toUInt()
     public fun toULong(): ULong = data.toULong()
 
+    public override fun toString(): String = toInt().toString()
+
 }
 
 public fun Byte.toUShort(): UShort = UShort(this.toShort() and 0xFF)

libraries/stdlib/unsigned/src/kotlin/UnsignedUtils.kt

@@ -51,4 +51,21 @@ internal fun ulongRemainder(v1: ULong, v2: ULong): ULong {
     val quotient = ((dividend ushr 1) / divisor) shl 1
     val rem = dividend - quotient * divisor
     return ULong(rem - if (ULong(rem) >= ULong(divisor)) divisor else 0)
-}
+}
+
+
+internal fun ulongToString(v: Long): String = ulongToString(v, 10)
+
+internal fun ulongToString(v: Long, base: Int): String {
+    require(base == 10) // TODO: toString(base) support in common
+    if (v >= 0) return v.toString(/* base */)
+
+    var quotient = ((v ushr 1) / base) shl 1
+    var rem = v - quotient * base
+    if (rem >= base) {
+        rem -= base
+        quotient += 1
+    }
+    return quotient.toString(/* base */) + rem.toString(/* base */)
+}
+