Merge branch 'dev' of https://github.com/hyb1996/NoRootScriptDroid into dev

# Conflicts:
#	.idea/caches/build_file_checksums.ser

common/src/main/java/com/stardust/ext/Common.kt

@@ -0,0 +1,13 @@
+package com.stardust.ext
+
+import kotlin.reflect.KMutableProperty0
+
+fun <R, T : KMutableProperty0<R?>> T.ifNull(provider: () -> R): R {
+    val value = this.get()
+    if (value != null) {
+        return value
+    }
+    val newValue = provider()
+    set(newValue)
+    return newValue
+}

common/src/main/java/com/stardust/io/ByteBufferBackedInputStream.kt

@@ -0,0 +1,30 @@
+package com.stardust.io
+
+import java.io.IOException
+import java.io.InputStream
+import java.nio.ByteBuffer
+
+class ByteBufferBackedInputStream(private var buf: ByteBuffer) : InputStream() {
+
+    @Throws(IOException::class)
+    override fun read(): Int {
+        return if (!buf.hasRemaining()) {
+            -1
+        } else buf.get().toInt() and 0xFF
+    }
+
+    @Throws(IOException::class)
+    override fun read(bytes: ByteArray, off: Int, len: Int): Int {
+        if (!buf.hasRemaining()) {
+            return -1
+        }
+        val read = Math.min(len, available())
+        buf.get(bytes, off, read)
+        buf.position(buf.position() - read)
+        return read
+    }
+
+    override fun available(): Int {
+        return buf.position()
+    }
+}

common/src/main/java/com/stardust/io/ByteBufferBackedOutputStream.kt

@@ -0,0 +1,19 @@
+package com.stardust.io
+
+import java.io.IOException
+import java.io.OutputStream
+import java.nio.ByteBuffer
+
+class ByteBufferBackedOutputStream(private var buf: ByteBuffer) : OutputStream() {
+
+    @Throws(IOException::class)
+    override fun write(b: Int) {
+        buf.put(b.toByte())
+    }
+
+    @Throws(IOException::class)
+    override fun write(bytes: ByteArray, off: Int, len: Int) {
+        buf.put(bytes, off, len)
+    }
+
+}