Cleanup throwing of the RangeError in the runtime to remove duplicated code.

runtime/lib/array.cc

Index: runtime/lib/array.cc
diff --git a/runtime/lib/array.cc b/runtime/lib/array.cc
index 7d9e076583483ae407786cab564af3ded01a1173..1bde5aceb14429b3e7ddb76945a7dc5e774a419f 100644
--- a/runtime/lib/array.cc
+++ b/runtime/lib/array.cc
@@ -23,9 +23,7 @@ DEFINE_NATIVE_ENTRY(List_getIndexed, 2) {
   const Array& array = Array::CheckedHandle(arguments->NativeArgAt(0));
   GET_NON_NULL_NATIVE_ARGUMENT(Smi, index, arguments->NativeArgAt(1));
   if ((index.Value() < 0) || (index.Value() >= array.Length())) {
-    const Array& args = Array::Handle(Array::New(1));
-    args.SetAt(0, index);
-    Exceptions::ThrowByType(Exceptions::kRange, args);
+    Exceptions::ThrowRangeError("index", index, 0, array.Length());
   }
   return array.At(index.Value());
 }
@@ -36,9 +34,7 @@ DEFINE_NATIVE_ENTRY(List_setIndexed, 3) {
   GET_NON_NULL_NATIVE_ARGUMENT(Smi, index, arguments->NativeArgAt(1));
   const Instance& value = Instance::CheckedHandle(arguments->NativeArgAt(2));
   if ((index.Value() < 0) || (index.Value() >= array.Length())) {
-    const Array& args = Array::Handle(Array::New(1));
-    args.SetAt(0, index);
-    Exceptions::ThrowByType(Exceptions::kRange, args);
+    Exceptions::ThrowRangeError("index", index, 0, array.Length());
   }
   array.SetAt(index.Value(), value);
   return Object::null();
@@ -51,6 +47,28 @@ DEFINE_NATIVE_ENTRY(List_getLength, 1) {
 }
 
 
+static void CheckRange(const char* name,
+                       intptr_t start,
+                       intptr_t count,
+                       intptr_t length) {
+  if ((start < 0) || ((start + count) > length)) {
+    if (count > length) {
+      Exceptions::ThrowRangeError(
+          "count",
+          Smi::Handle(Smi::New(count)),
+          0,
+          length + 1);
+    } else {
+      Exceptions::ThrowRangeError(
+          name,
+          Smi::Handle(Smi::New(start)),
+          0,
+          length - count);
+    }
+  }
+}
+
+
 // ObjectArray src, int srcStart, int dstStart, int count.
 DEFINE_NATIVE_ENTRY(List_copyFromObjectArray, 5) {
   const Array& dest = Array::CheckedHandle(arguments->NativeArgAt(0));
@@ -67,18 +85,10 @@ DEFINE_NATIVE_ENTRY(List_copyFromObjectArray, 5) {
   }
   intptr_t isrc_start = src_start.Value();
   intptr_t idst_start = dst_start.Value();
-  if ((isrc_start < 0) || ((isrc_start + icount) > source.Length())) {
-    const Array& args = Array::Handle(Array::New(1));
-    args.SetAt(0, src_start);
-    Exceptions::ThrowByType(Exceptions::kRange, args);
-  }
-  if ((idst_start < 0) || ((idst_start + icount) > dest.Length())) {
-    const Array& args = Array::Handle(Array::New(1));
-    args.SetAt(0, dst_start);
-    Exceptions::ThrowByType(Exceptions::kRange, args);
-  }
+  CheckRange("source", isrc_start, icount, source.Length());
+  CheckRange("destination", idst_start, icount, dest.Length());
 
-  Object& src_obj = Object::Handle();
+  PassiveObject& src_obj = PassiveObject::Handle();
   if (isrc_start < idst_start) {
     for (intptr_t i = icount - 1; i >= 0; i--) {
       src_obj = source.At(isrc_start + i);
@@ -90,6 +100,7 @@ DEFINE_NATIVE_ENTRY(List_copyFromObjectArray, 5) {
       dest.SetAt(idst_start + i, src_obj);
     }
   }
+
   return Object::null();
 }