blob: d13b2efad159a157e9719bc05c9f60dc8a712a5e [file] [log] [blame]
// 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