Hide nativeMemUtils and pointerSize

Interop/Runtime/src/jvm/kotlin/kotlinx/cinterop/JvmNativeMem.kt

@@ -34,9 +34,11 @@ private val dataModel: DataModel = when (System.getProperty("sun.arch.data.model
 }
 
 // Must be only used in interop, contains host pointer size, not target!
-val pointerSize: Int = dataModel.pointerSize.toInt()
+@PublishedApi
+internal val pointerSize: Int = dataModel.pointerSize.toInt()
 
-object nativeMemUtils {
+@PublishedApi
+internal object nativeMemUtils {
     fun getByte(mem: NativePointed) = unsafe.getByte(mem.address)
     fun putByte(mem: NativePointed, value: Byte) = unsafe.putByte(mem.address, value)
 

Interop/Runtime/src/main/kotlin/kotlinx/cinterop/Utils.kt

@@ -379,3 +379,9 @@ inline fun <R> memScoped(block: MemScope.()->R): R {
         memScope.clear()
     }
 }
+
+fun COpaquePointer.readBytes(count: Int): ByteArray {
+    val result = ByteArray(count)
+    nativeMemUtils.getByteArray(this.reinterpret<ByteVar>().pointed, result, count)
+    return result
+}

Interop/Runtime/src/native/kotlin/kotlinx/cinterop/NativeMem.kt

@@ -2,13 +2,16 @@ package kotlinx.cinterop
 
 import konan.internal.Intrinsic
 
-inline val pointerSize: Int
+@PublishedApi
+internal inline val pointerSize: Int
     get() = getPointerSize()
 
-@Intrinsic external fun getPointerSize(): Int
+@PublishedApi
+@Intrinsic internal external fun getPointerSize(): Int
 
 // TODO: do not use singleton because it leads to init-check on any access.
-object nativeMemUtils {
+@PublishedApi
+internal object nativeMemUtils {
     @Intrinsic external fun getByte(mem: NativePointed): Byte
     @Intrinsic external fun putByte(mem: NativePointed, value: Byte)
 

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/HashUtils.kt

@@ -57,9 +57,7 @@ public fun base64Decode(encoded: String): ByteArray {
         val errorCode = DecodeBase64(encoded, encoded.length, result, resultSize)
         if (errorCode != 0) throw Error("Non-zero exit code of DecodeBase64: ${errorCode}")
         val realSize = resultSize[0]
-        val bytes = ByteArray(realSize)
+        return result.readBytes(realSize)
-        nativeMemUtils.getByteArray(result.pointed, bytes, realSize)
-        return bytes
     }
 }
 

samples/libcurl/src/main/kotlin/org/konan/libcurl/CUrl.kt

@@ -31,8 +31,7 @@ class CUrl(val url: String)  {
 }
 
 fun CPointer<ByteVar>.toKString(length: Int): String {
-    val bytes = ByteArray(length)
+    val bytes = this.readBytes(length)
-    nativeMemUtils.getByteArray(pointed, bytes, length)
     return kotlin.text.fromUtf8Array(bytes, 0, bytes.size)
 }