VM: Re-format to use at most one newline between functions

runtime/lib/math.cc

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include <ctype.h>  // isspace.
 
 #include "vm/bootstrap_natives.h"
 
 #include "vm/exceptions.h"
 #include "vm/native_entry.h"
@@ skipping 56 matching lines @@
 
 DEFINE_NATIVE_ENTRY(Math_doublePow, 2) {
   const double operand =
       Double::CheckedHandle(arguments->NativeArgAt(0)).value();
   GET_NON_NULL_NATIVE_ARGUMENT(Double, exponent_object,
                                arguments->NativeArgAt(1));
   const double exponent = exponent_object.value();
   return Double::New(pow(operand, exponent));
 }
 
-
 // Returns the typed-data array store in '_Random._state' field.
 static RawTypedData* GetRandomStateArray(const Instance& receiver) {
   const Class& random_class = Class::Handle(receiver.clazz());
   const Field& state_field =
       Field::Handle(random_class.LookupFieldAllowPrivate(Symbols::_state()));
   ASSERT(!state_field.IsNull());
   const Instance& state_field_value =
       Instance::Cast(Object::Handle(receiver.GetField(state_field)));
   ASSERT(!state_field_value.IsNull());
   ASSERT(state_field_value.IsTypedData());
   const TypedData& array = TypedData::Cast(state_field_value);
   ASSERT(array.Length() == 2);
   ASSERT(array.ElementType() == kUint32ArrayElement);
   return array.raw();
 }
 
-
 // Implements:
 //   var state =
 //       ((_A * (_state[_kSTATE_LO])) + _state[_kSTATE_HI]) & (1 << 64) - 1);
 //   _state[_kSTATE_LO] = state & (1 << 32) - 1);
 //   _state[_kSTATE_HI] = state >> 32;
 DEFINE_NATIVE_ENTRY(Random_nextState, 1) {
   GET_NON_NULL_NATIVE_ARGUMENT(Instance, receiver, arguments->NativeArgAt(0));
   const TypedData& array = TypedData::Handle(GetRandomStateArray(receiver));
   const uint64_t state_lo = array.GetUint32(0);
   const uint64_t state_hi = array.GetUint32(array.ElementSizeInBytes());
   const uint64_t A = 0xffffda61;
   uint64_t state = (A * state_lo) + state_hi;
   array.SetUint32(0, static_cast<uint32_t>(state));
   array.SetUint32(array.ElementSizeInBytes(),
                   static_cast<uint32_t>(state >> 32));
   return Object::null();
 }
 
-
 RawTypedData* CreateRandomState(Zone* zone, uint64_t seed) {
   const TypedData& result =
       TypedData::Handle(zone, TypedData::New(kTypedDataUint32ArrayCid, 2));
   result.SetUint32(0, static_cast<uint32_t>(seed));
   result.SetUint32(result.ElementSizeInBytes(),
                    static_cast<uint32_t>(seed >> 32));
   return result.raw();
 }
 
-
 uint64_t mix64(uint64_t n) {
   // Thomas Wang 64-bit mix.
   // http://www.concentric.net/~Ttwang/tech/inthash.htm
   // via. http://web.archive.org/web/20071223173210/http://www.concentric.net/~Ttwang/tech/inthash.htm
   n = (~n) + (n << 21);  // n = (n << 21) - n - 1;
   n = n ^ (n >> 24);
   n = n * 265;  // n = (n + (n << 3)) + (n << 8);
   n = n ^ (n >> 14);
   n = n * 21;  // n = (n + (n << 2)) + (n << 4);
   n = n ^ (n >> 28);
   n = n + (n << 31);
   return n;
 }
 
-
 // Implements:
 //   uint64_t hash = 0;
 //   do {
 //      hash = hash * 1037 ^ mix64((uint64_t)seed);
 //      seed >>= 64;
 //   } while (seed != 0 && seed != -1);  // Limits if seed positive or negative.
 //   if (hash == 0) {
 //     hash = 0x5A17;
 //   }
 //   var result = new Uint32List(2);
@@ skipping 35 matching lines @@
   } else {
     seed = mix64(static_cast<uint64_t>(seed_int.AsInt64Value()));
   }
 
   if (seed == 0) {
     seed = 0x5a17;
   }
   return CreateRandomState(zone, seed);
 }
 
-
 DEFINE_NATIVE_ENTRY(Random_initialSeed, 0) {
   Random* rnd = isolate->random();
   uint64_t seed = rnd->NextUInt32();
   seed |= (static_cast<uint64_t>(rnd->NextUInt32()) << 32);
   return CreateRandomState(zone, seed);
 }
 
-
 DEFINE_NATIVE_ENTRY(SecureRandom_getBytes, 1) {
   GET_NON_NULL_NATIVE_ARGUMENT(Smi, count, arguments->NativeArgAt(0));
   const intptr_t n = count.Value();
   ASSERT((n > 0) && (n <= 8));
   uint8_t buffer[8];
   Dart_EntropySource entropy_source = Dart::entropy_source_callback();
   if ((entropy_source == NULL) || !entropy_source(buffer, n)) {
     const String& error = String::Handle(String::New(
         "No source of cryptographically secure random numbers available."));
     const Array& args = Array::Handle(Array::New(1));
     args.SetAt(0, error);
     Exceptions::ThrowByType(Exceptions::kUnsupported, args);
   }
   uint64_t result = 0;
   for (intptr_t i = 0; i < n; i++) {
     result = (result << 8) | buffer[i];
   }
   return Integer::New(result);
 }
 
 }  // namespace dart