| // 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" |
| #include "vm/object.h" |
| #include "vm/symbols.h" |
| |
| namespace dart { |
| |
| DEFINE_NATIVE_ENTRY(Math_doublePow, 0, 2) { |
| const double operand = |
| Double::CheckedHandle(zone, 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)); |
| } |
| |
| DEFINE_NATIVE_ENTRY(Random_initialSeed, 0, 0) { |
| Random* rnd = isolate->random(); |
| uint64_t seed = rnd->NextUInt32(); |
| seed |= (static_cast<uint64_t>(rnd->NextUInt32()) << 32); |
| return Integer::New(seed); |
| } |
| |
| DEFINE_NATIVE_ENTRY(SecureRandom_getBytes, 0, 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 |