1 files changed, 51 insertions, 0 deletions
diff --git a/runtime/commonMain/src/kotlinx/io/Streams.kt b/runtime/commonMain/src/kotlinx/io/Streams.kt
new file mode 100644
index 00000000..ce67488e
--- /dev/null
+++ b/runtime/commonMain/src/kotlinx/io/Streams.kt
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2017 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package kotlinx.io
+
+expect open class IOException: Exception {
+    constructor()
+    constructor(message: String)
+}
+
+expect abstract class InputStream {
+    open fun available(): Int
+    open fun close()
+    abstract fun read(): Int
+    open fun read(b: ByteArray): Int
+    open fun read(b: ByteArray, offset: Int, len: Int): Int
+    open fun skip(n: Long): Long
+}
+
+expect class ByteArrayInputStream(buf: ByteArray): InputStream {
+    override fun read(): Int
+}
+
+expect abstract class OutputStream {
+    open fun close()
+    open fun flush()
+    open fun write(buffer: ByteArray, offset: Int, count: Int)
+    open fun write(buffer: ByteArray)
+    abstract fun write(oneByte: Int)
+
+}
+
+@Suppress("NON_FINAL_MEMBER_IN_FINAL_CLASS") // KT-17944
+expect class ByteArrayOutputStream(): OutputStream {
+    override fun write(oneByte: Int)
+    fun toByteArray(): ByteArray
+    fun size(): Int
+}