1 files changed, 71 insertions, 0 deletions
diff --git a/runtime/commonMain/src/kotlinx/io/Writers.kt b/runtime/commonMain/src/kotlinx/io/Writers.kt
new file mode 100644
index 00000000..f1e47289
--- /dev/null
+++ b/runtime/commonMain/src/kotlinx/io/Writers.kt
@@ -0,0 +1,71 @@
+/*
+ * 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
+
+@Suppress("NO_ACTUAL_FOR_EXPECT") // see KT-19848
+expect abstract class Writer protected constructor() {
+    open fun write(ch: Int)
+    open fun write(str: String)
+    abstract fun write(src: CharArray, off: Int, len: Int)
+    abstract fun flush()
+    abstract fun close()
+}
+
+expect open class PrintWriter(w: Writer) : Writer {
+    open fun print(s: String)
+    open fun print(ch: Char)
+    open fun print(value: Float)
+    open fun print(value: Double)
+    open fun print(value: Boolean)
+    open fun print(value: Int)
+    open fun print(value: Long)
+    open fun print(value: Any?)
+
+    open fun println()
+    open fun println(s: String)
+    open fun println(ch: Char)
+    open fun println(value: Float)
+    open fun println(value: Double)
+    open fun println(value: Boolean)
+    open fun println(value: Int)
+    open fun println(value: Long)
+    open fun println(value: Any?)
+
+    override fun write(src: CharArray, off: Int, len: Int)
+    override fun flush()
+    override fun close()
+}
+
+expect class StringWriter(): Writer {
+    override fun toString(): String
+    override fun write(src: CharArray, off: Int, len: Int)
+    override fun flush()
+    override fun close()
+}
+
+@Suppress("NO_ACTUAL_FOR_EXPECT") // see KT-19848
+expect abstract class Reader protected constructor() {
+    open fun read(): Int
+    abstract fun read(dst: CharArray, off: Int, len: Int): Int
+    abstract fun close()
+}
+
+expect class StringReader(str: String): Reader {
+    override fun read(): Int
+    override fun read(dst: CharArray, off: Int, len: Int): Int
+    override fun close()
+}
+\ No newline at end of file