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// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/common/rand_util.h"
#include <stdlib.h>
#include "base/logging.h"
namespace rand_util {
int RandInt(int min, int max) {
return RandIntSecure(min, max);
}
int RandIntSecure(int min, int max) {
unsigned int number;
// This code will not work on win2k, which we do not support.
errno_t rv = rand_s(&number);
DCHECK(rv == 0) << "rand_s failed with error " << rv;
// From the rand man page, use this instead of just rand() % max, so that the
// higher bits are used.
return min + static_cast<int>(static_cast<double>(max - min + 1.0) *
(number / (UINT_MAX + 1.0)));
}
} // namespace rand_util
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