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4faf01a66c
TEST=ci Change-Id: I65936b5cd6e5933eadc37f3cd6bba1f0fa1b81a5 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/231328 Reviewed-by: Alexander Markov <alexmarkov@google.com> Commit-Queue: Ryan Macnak <rmacnak@google.com>
53 lines
1.7 KiB
C++
53 lines
1.7 KiB
C++
// Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include <ctype.h> // isspace.
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#include "vm/bootstrap_natives.h"
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#include "vm/exceptions.h"
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#include "vm/native_entry.h"
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#include "vm/object.h"
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#include "vm/symbols.h"
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namespace dart {
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DEFINE_NATIVE_ENTRY(Math_doublePow, 0, 2) {
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const double operand =
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Double::CheckedHandle(zone, arguments->NativeArgAt(0)).value();
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GET_NON_NULL_NATIVE_ARGUMENT(Double, exponent_object,
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arguments->NativeArgAt(1));
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const double exponent = exponent_object.value();
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return Double::New(pow(operand, exponent));
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}
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DEFINE_NATIVE_ENTRY(Random_initialSeed, 0, 0) {
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Random* rnd = isolate->random();
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uint64_t seed = rnd->NextUInt32();
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seed |= (static_cast<uint64_t>(rnd->NextUInt32()) << 32);
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return Integer::New(seed);
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}
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DEFINE_NATIVE_ENTRY(SecureRandom_getBytes, 0, 1) {
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GET_NON_NULL_NATIVE_ARGUMENT(Smi, count, arguments->NativeArgAt(0));
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const intptr_t n = count.Value();
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ASSERT((n > 0) && (n <= 8));
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uint8_t buffer[8];
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Dart_EntropySource entropy_source = Dart::entropy_source_callback();
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if ((entropy_source == NULL) || !entropy_source(buffer, n)) {
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const String& error = String::Handle(String::New(
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"No source of cryptographically secure random numbers available."));
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const Array& args = Array::Handle(Array::New(1));
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args.SetAt(0, error);
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Exceptions::ThrowByType(Exceptions::kUnsupported, args);
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}
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uint64_t result = 0;
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for (intptr_t i = 0; i < n; i++) {
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result = (result << 8) | buffer[i];
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}
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return Integer::New(result);
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}
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} // namespace dart
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