feat(core): implement toString with radix

Author: ObserverOfTime

kbigint/src/androidMain/kotlin/io/github/observeroftime/kbigint/KBigInt.kt

@@ -105,9 +105,11 @@ actual class KBigInt private constructor(private var value: BigInteger) : Compar
 
     actual override fun equals(other: Any?) = other is KBigInt && value == other.value
 
-    actual override fun hashCode() = toString().hashCode()
+    actual override fun hashCode(): Int = toString().hashCode()
 
-    actual override fun toString() = value.toString()
+    actual fun toString(radix: Int): String = value.toString(radix)
+
+    actual override fun toString(): String = value.toString()
 
     /**
      * Convert the value to an [Int].

kbigint/src/androidUnitTest/kotlin/io/github/observeroftime/kbigint/KBigIntTest.kt

@@ -114,6 +114,7 @@ actual class KBigIntTest {
     @Test
     actual fun testToString() {
         assertEquals(OVER_MAX_LONG, string.toString())
+        assertEquals(OVER_MAX_INT.toString(2), long.toString(2))
     }
 
     @Test

kbigint/src/commonMain/kotlin/io/github/observeroftime/kbigint/KBigInt.kt

@@ -89,5 +89,8 @@ expect class KBigInt : Comparable<KBigInt> {
 
     override fun hashCode(): Int
 
+    /** Convert the value to a [String] with the given [radix]. */
+    fun toString(radix: Int): String
+
     override fun toString(): String
 }

kbigint/src/jsMain/kotlin/io/github/observeroftime/kbigint/KBigInt.kt

@@ -149,7 +149,12 @@ actual class KBigInt private constructor(@JsExternalArgument private var value:
 
     actual override fun equals(other: Any?) = other is KBigInt && value == other.value
 
-    actual override fun hashCode() = toString().hashCode()
+    actual override fun hashCode(): Int = toString().hashCode()
+
+    @JsName("toRadixString")
+    actual fun toString(radix: Int) = value.toString(radix)
+
+    actual override fun toString() = value.toString()
 
     /**
      * Convert the value to an [Int].
@@ -161,7 +166,5 @@ actual class KBigInt private constructor(@JsExternalArgument private var value:
     /** Convert the value to a [Double]. */
     fun toDouble() = toString().toDouble()
 
-    actual override fun toString() = value.toString()
-
     actual fun toByteArray() = KBigIntUtils.toByteArray(value)
 }

kbigint/src/jsMain/kotlin/io/github/observeroftime/kbigint/KBigIntUtils.kt

@@ -1,6 +1,8 @@
 package io.github.observeroftime.kbigint
 
-internal external class BigInt
+internal external class BigInt {
+    fun toString(radix: Int): String
+}
 
 internal external fun BigInt(n: dynamic): BigInt
 

kbigint/src/jsTest/kotlin/io/github/observeroftime/kbigint/KBigIntTest.kt

@@ -117,6 +117,7 @@ actual class KBigIntTest {
     @Test
     actual fun testToString() {
         assertEquals(OVER_MAX_LONG, string.toString())
+        assertEquals(OVER_MAX_INT.toString(2), long.toString(2))
     }
 
     @Test

kbigint/src/jvmMain/kotlin/io/github/observeroftime/kbigint/KBigInt.kt

@@ -100,9 +100,11 @@ actual class KBigInt private constructor(private var value: BigInteger) : Compar
 
     actual override fun equals(other: Any?) = other is KBigInt && value == other.value
 
-    actual override fun hashCode() = toString().hashCode()
+    actual override fun hashCode(): Int = toString().hashCode()
 
-    actual override fun toString() = value.toString()
+    actual fun toString(radix: Int): String = value.toString(radix)
+
+    actual override fun toString(): String = value.toString()
 
     /**
      * Convert the value to an [Int].

kbigint/src/jvmTest/kotlin/io/github/observeroftime/kbigint/KBigIntTest.kt

@@ -114,6 +114,7 @@ actual class KBigIntTest {
     @Test
     actual fun testToString() {
         assertEquals(OVER_MAX_LONG, string.toString())
+        assertEquals(OVER_MAX_INT.toString(2), long.toString(2))
     }
 
     @Test

kbigint/src/nativeMain/kotlin/io/github/observeroftime/kbigint/KBigInt.kt

@@ -375,19 +375,21 @@ actual class KBigInt private constructor(private var value: mp_int) : Comparable
 
     actual override fun equals(other: Any?) = other is KBigInt && mp_cmp(value.ptr, other.value.ptr) == 0
 
-    actual override fun hashCode() = toString().hashCode()
+    actual override fun hashCode(): Int = toString().hashCode()
 
-    actual override fun toString(): String {
+    actual fun toString(radix: Int): String {
         val arena = Arena()
         val size = arena.alloc<IntVar>()
-        mp_radix_size(value.ptr, 10, size.ptr).check()
+        mp_radix_size(value.ptr, radix, size.ptr).check()
         val result = arena.allocArray<ByteVar>(size.value)
-        mp_to_radix(value.ptr, result, size.value.toULong(), null, 10).check()
+        mp_to_radix(value.ptr, result, size.value.toULong(), null, radix).check()
         val string = result.toKString()
         arena.clear()
         return string
     }
 
+    actual override fun toString() = toString(10)
+
     /** Convert the value to an [Int]. */
     fun toInt() = mp_get_i32(value.ptr)
 

kbigint/src/nativeTest/kotlin/io/github/observeroftime/kbigint/KBigIntTest.kt

@@ -135,6 +135,7 @@ actual class KBigIntTest {
     @Test
     actual fun testToString() {
         assertEquals(OVER_MAX_LONG, string.toString())
+        assertEquals(OVER_MAX_INT.toString(2), long.toString(2))
     }
 
     @Test