initial: varing and smarting packing tools

src/commonTest/kotlin/bintools/SmartintTest.kt

@@ -0,0 +1,44 @@
+package bintools
+
+import com.icodici.ubdata.Smartint
+import net.sergeych.bintools.encodeToHex
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+class SmartintTest {
+
+    fun testValue(x: Long) {
+        assertEquals(x.toULong(), Smartint.decode(Smartint.encode(x.toULong())))
+        assertEquals(x, Smartint.decodeSigned(Smartint.encodeSigned(x)))
+        println("+ ${x}: ${Smartint.encode(x.toULong()).encodeToHex()}")
+    }
+
+    fun testAround(bits: Int) {
+        println("----- $bits -----")
+        val window = 5
+        var median: Long = (1.toULong() shl bits).toLong()
+        for( x in (median-2)..(median+2)) {
+            testValue(x)
+        }
+        median = median * 3 / 2
+        for( x in (median-5)..(median+5)) {
+            testValue(x)
+        }
+    }
+
+    @Test
+    fun encode() {
+        for( i in 0..70) testValue(i.toLong())
+        testAround(6)
+        testAround(14)
+        testAround(22)
+        testAround(29)
+        testAround(36)
+        testValue(-1)
+//        testAround(28)
+    }
+
+    @Test
+    fun decode() {
+    }
+}