WIP: partial implementation of bignums, pushed for multi-dev debugging

Author: ianbotsf

gradle.properties

@@ -2,6 +2,7 @@ kotlin.code.style=official
 kotlin.incremental.js=true
 kotlin.incremental.multiplatform=true
 kotlin.mpp.stability.nowarn=true
+kotlin.native.binary.sourceInfoType=libbacktrace
 kotlin.native.ignoreDisabledTargets=true
 
 # atomicfu
@@ -16,4 +17,4 @@ org.gradle.jvmargs=-Xmx2G -XX:MaxMetaspaceSize=1G
 sdkVersion=1.3.30-SNAPSHOT
 
 # codegen
-codegenVersion=0.33.30-SNAPSHOT
+codegenVersion=0.33.30-SNAPSHOT

gradle/libs.versions.toml

@@ -15,6 +15,7 @@ slf4j-version = "2.0.16"
 slf4j-v1x-version = "1.7.36"
 crt-kotlin-version = "0.8.10"
 micrometer-version = "1.13.6"
+kotlin-multiplatform-bignum-version = "0.3.10"
 
 # codegen
 smithy-version = "1.51.0"
@@ -101,6 +102,8 @@ ktor-client-core = { module = "io.ktor:ktor-client-core", version.ref = "ktor-ve
 kaml = { module = "com.charleskorn.kaml:kaml", version.ref = "kaml-version" }
 jsoup = { module = "org.jsoup:jsoup", version.ref = "jsoup-version" }
 
+kotlin-multiplatform-bignum = { module = "com.ionspin.kotlin:bignum", version.ref = "kotlin-multiplatform-bignum-version" }
+
 [plugins]
 dokka = { id = "org.jetbrains.dokka", version.ref = "dokka-version"}
 kotlin-jvm = {id = "org.jetbrains.kotlin.jvm", version.ref = "kotlin-version" }

runtime/runtime-core/build.gradle.kts

@@ -1,3 +1,5 @@
+import org.gradle.api.tasks.testing.logging.TestExceptionFormat
+
 /*
  * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
  * SPDX-License-Identifier: Apache-2.0
@@ -43,6 +45,12 @@ kotlin {
             }
         }
 
+        nativeMain {
+            dependencies {
+                implementation(libs.kotlin.multiplatform.bignum)
+            }
+        }
+
         all {
             languageSettings.optIn("aws.smithy.kotlin.runtime.InternalApi")
         }

runtime/runtime-core/common/test/aws/smithy/kotlin/runtime/content/BigIntegerTest.kt

@@ -77,7 +77,6 @@ class BigIntegerTest {
             "0x123456789abcdef0" to "1311768467463790320",
             "0x00ffffffffffffffffffffffffffffffec" to "340282366920938463463374607431768211436",
             "0x81445edf51ddc07216da5621c727bfd379d400f3da08018d45749a" to "-52134902384590238490284023839028330923830129830129301234239834982",
-
         )
 
         tests.forEach { (hex, expected) ->

runtime/runtime-core/native/src/aws/smithy/kotlin/runtime/content/BigIntegerNative.kt

@@ -4,37 +4,38 @@
  */
 package aws.smithy.kotlin.runtime.content
 
-public actual class BigInteger actual constructor(value: String) :
+import com.ionspin.kotlin.bignum.integer.util.fromTwosComplementByteArray
+import com.ionspin.kotlin.bignum.integer.util.toTwosComplementByteArray
+import com.ionspin.kotlin.bignum.integer.BigInteger as IonSpinBigInteger
+
+public actual class BigInteger private constructor(private val delegate: IonSpinBigInteger) :
     Number(),
     Comparable<BigInteger> {
-    public actual constructor(bytes: ByteArray) : this("Not yet implemented")
 
-    actual override fun toByte(): Byte {
-        TODO("Not yet implemented")
+    private companion object {
+        fun coalesceOrCreate(value: IonSpinBigInteger, left: BigInteger, right: BigInteger): BigInteger = when (value) {
+            left.delegate -> left
+            right.delegate -> right
+            else -> BigInteger(value)
+        }
     }
 
-    actual override fun toDouble(): Double {
-        TODO("Not yet implemented")
-    }
+    public actual constructor(value: String) : this(IonSpinBigInteger.parseString(value, 10))
+    public actual constructor(bytes: ByteArray) : this(IonSpinBigInteger.fromTwosComplementByteArray(bytes))
 
-    actual override fun toFloat(): Float {
-        TODO("Not yet implemented")
-    }
+    actual override fun toByte(): Byte = delegate.byteValue(exactRequired = false)
+    actual override fun toDouble(): Double = delegate.doubleValue(exactRequired = false)
+    actual override fun toFloat(): Float = delegate.floatValue(exactRequired = false)
+    actual override fun toInt(): Int = delegate.intValue(exactRequired = false)
+    actual override fun toLong(): Long = delegate.longValue(exactRequired = false)
+    actual override fun toShort(): Short = delegate.shortValue(exactRequired = false)
 
-    actual override fun toInt(): Int {
-        TODO("Not yet implemented")
-    }
+    public actual operator fun plus(other: BigInteger): BigInteger =
+        coalesceOrCreate(delegate + other.delegate, this, other)
 
-    actual override fun toLong(): Long {
-        TODO("Not yet implemented")
-    }
-
-    actual override fun toShort(): Short {
-        TODO("Not yet implemented")
-    }
+    public actual operator fun minus(other: BigInteger): BigInteger =
+        coalesceOrCreate(delegate - other.delegate, this, other)
 
-    public actual operator fun plus(other: BigInteger): BigInteger = TODO("Not yet implemented")
-    public actual operator fun minus(other: BigInteger): BigInteger = TODO("Not yet implemented")
-    public actual fun toByteArray(): ByteArray = TODO("Not yet implemented")
-    actual override fun compareTo(other: BigInteger): Int = TODO("Not yet implemented")
+    public actual fun toByteArray(): ByteArray = delegate.toTwosComplementByteArray()
+    actual override fun compareTo(other: BigInteger): Int = delegate.compare(other.delegate)
 }