Add IoBuffer preconditions

Author: Sergey Mashkov

kotlinx-io-js/src/main/kotlin/kotlinx/io/core/IoBufferJS.kt

@@ -27,6 +27,10 @@ actual class IoBuffer internal constructor(
     private var littleEndian = false
     private var platformEndian = ByteOrder.nativeOrder() == ByteOrder.BIG_ENDIAN
 
+    init {
+        require(origin !== this) { "origin shouldn't point to itself" }
+    }
+
     @ExperimentalIoApi
     actual var attachment: Any? = null
 

kotlinx-io-jvm/src/main/kotlin/kotlinx/io/core/IoBufferJVM.kt

@@ -46,6 +46,7 @@ actual class IoBuffer private constructor(
         }
 
     init {
+        require(origin !== this) { "origin shouldn't point to itself" }
         readBuffer.limit(0)
     }
 

kotlinx-io-native/src/main/kotlin/kotlinx/io/core/IoBufferNative.kt

@@ -38,6 +38,11 @@ actual class IoBuffer internal constructor(
 
     override val endOfInput: Boolean get() = !canRead()
 
+    init {
+        require(contentCapacity >= 0) { "contentCapacity shouln't be negative: $contentCapacity" }
+        require(this !== origin) { "origin shouldn't point to itself" }
+    }
+
     actual final override var byteOrder: ByteOrder = ByteOrder.BIG_ENDIAN
         set(newOrder) {
             field = newOrder