[JS IR BE] hashCode, toString, number conversion support

libraries/stdlib/js/irRuntime/compareTo.kt

@@ -0,0 +1,43 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
+ */
+
+package kotlin.js
+
+
+// Adopted from misc.js
+
+fun compareTo(a: dynamic, b: dynamic): Int {
+    var typeA = typeOf(a)
+    if (typeA == "number") {
+        if (typeOf(b) == "number") {
+            return doubleCompareTo(a, b)
+        }
+        return primitiveCompareTo(a, b)
+    }
+    if (typeA == "string" || typeA == "boolean") {
+        return primitiveCompareTo(a, b)
+    }
+
+    // TODO: Replace to a.unsafeCast<Comparable<*>>().compareTo(b) when bridge is implemented
+    return js("a.compareTo(b)").unsafeCast<Int>()
+}
+
+fun primitiveCompareTo(a: dynamic, b: dynamic): Int =
+    js("a < b ? -1 : a > b ? 1 : 0").unsafeCast<Int>()
+
+fun doubleCompareTo(a: dynamic, b: dynamic): Int =
+    js("""
+    if (a < b) return -1;
+    if (a > b) return 1;
+
+    if (a === b) {
+        if (a !== 0) return 0;
+
+        var ia = 1 / a;
+        return ia === 1 / b ? 0 : (ia < 0 ? -1 : 1);
+    }
+
+    return a !== a ? (b !== b ? 0 : 1) : -1
+    """).unsafeCast<Int>()

libraries/stdlib/js/irRuntime/core.kt

@@ -0,0 +1,101 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
+ */
+
+package kotlin.js
+
+fun equals(obj1: dynamic, obj2: dynamic): Boolean {
+    if (obj1 == null) {
+        return obj2 == null
+    }
+
+    if (obj2 == null) {
+        return false
+    }
+
+    return js("""
+    if (typeof obj1 === "object" && typeof obj1.equals === "function") {
+        return obj1.equals(obj2);
+    }
+
+    if (obj1 !== obj1) {
+        return obj2 !== obj2;
+    }
+
+    if (typeof obj1 === "number" && typeof obj2 === "number") {
+        return obj1 === obj2 && (obj1 !== 0 || 1 / obj1 === 1 / obj2)
+    }
+    return obj1 === obj2;
+    """).unsafeCast<Boolean>()
+}
+
+fun toString(o: dynamic): String = when {
+    o == null -> "null"
+    isArrayish(o) -> "[...]"
+    else -> js("o.toString()").unsafeCast<String>()
+}
+
+// TODO: Simplify, extract kotlin declarations for inner helper functions
+fun hashCode(obj: dynamic): Int {
+    return js(
+        """
+    function hashCode(obj) {
+        if (obj == null) {
+            return 0;
+        }
+        var objType = typeof obj;
+        if ("object" === objType) {
+            return "function" === typeof obj.hashCode ? obj.hashCode() : getObjectHashCode(obj);
+        }
+        if ("function" === objType) {
+            return getObjectHashCode(obj);
+        }
+        if ("number" === objType) {
+            return getNumberHashCode(obj);
+        }
+        if ("boolean" === objType) {
+            return Number(obj)
+        }
+
+        var str = String(obj);
+        return getStringHashCode(str);
+    };
+
+    /** @const */
+    var POW_2_32 = 4294967296;
+    // TODO: consider switching to Symbol type once we are on ES6.
+    /** @const */
+    var OBJECT_HASH_CODE_PROPERTY_NAME = "kotlinHashCodeValue${'$'}";
+
+    function getObjectHashCode(obj) {
+        if (!(OBJECT_HASH_CODE_PROPERTY_NAME in obj)) {
+            var hash = (Math.random() * POW_2_32) | 0; // Make 32-bit singed integer.
+            Object.defineProperty(obj, OBJECT_HASH_CODE_PROPERTY_NAME, { value:  hash, enumerable: false });
+        }
+        return obj[OBJECT_HASH_CODE_PROPERTY_NAME];
+    }
+
+    function getStringHashCode(str) {
+        var hash = 0;
+        for (var i = 0; i < str.length; i++) {
+            var code  = str.charCodeAt(i);
+            hash  = (hash * 31 + code) | 0; // Keep it 32-bit.
+        }
+        return hash;
+    }
+
+    function getNumberHashCode(obj) {
+        if ((obj | 0) === obj) {
+            return obj | 0;
+        }
+        else {
+            bufFloat64[0] = obj;
+            return (bufInt32[highIndex] * 31 | 0) + bufInt32[lowIndex] | 0;
+        }
+    }
+
+    return hashCode(obj);
+    """
+    ).unsafeCast<Int>()
+}

libraries/stdlib/js/irRuntime/numberConversion.kt

@@ -0,0 +1,26 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
+ */
+
+package kotlin.js
+
+fun asIs(a: dynamic) = a
+
+fun numberToByte(a: dynamic): Byte = toByte(numberToInt(a))
+
+fun numberToDouble(a: dynamic): Double = js("+a").unsafeCast<Double>()
+
+fun numberToInt(a: dynamic): Int = doubleToInt(a)
+
+fun numberToShort(a: dynamic): Short = toShort(numberToInt(a))
+
+// << and >> shifts are used to preserve sign of the number
+fun toByte(a: dynamic): Byte = js("a << 24 >> 24").unsafeCast<Byte>()
+fun toShort(a: dynamic): Short = js("a << 16 >> 16").unsafeCast<Short>()
+
+fun doubleToInt(a: dynamic) = js("""
+    if (a > 2147483647) return 2147483647;
+    if (a < -2147483648) return -2147483648;
+    return a | 0;
+""").unsafeCast<Int>()

libraries/stdlib/js/irRuntime/typeCheckUtils.kt

@@ -75,7 +75,7 @@ public fun isInterface(ctor: dynamic, IType: dynamic): Boolean {
 }
 */
 
-inline private fun typeOf(obj: dynamic) = js("typeof obj").unsafeCast<String>()
+fun typeOf(obj: dynamic) = js("typeof obj").unsafeCast<String>()
 
 fun isObject(obj: dynamic): Boolean {
     val objTypeOf = typeOf(obj)
@@ -93,6 +93,10 @@ public fun isArray(obj: Any): Boolean {
     return js("Array.isArray(obj)").unsafeCast<Boolean>()
 }
 
+public fun isArrayish(o: dynamic) =
+    isArray(o) || js("ArrayBuffer.isView(o)").unsafeCast<Boolean>()
+
+
 public fun isChar(c: Any): Boolean {
     return js("throw Error(\"isChar is not implemented\")").unsafeCast<Boolean>()
 }