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/*
* Copyright 2004 The WebRTC Project Authors. All rights reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef WEBRTC_RTC_BASE_HELPERS_H_
#define WEBRTC_RTC_BASE_HELPERS_H_
#include <string>
#include "webrtc/rtc_base/basictypes.h"
namespace rtc {
// For testing, we can return predictable data.
void SetRandomTestMode(bool test);
// Initializes the RNG, and seeds it with the specified entropy.
bool InitRandom(int seed);
bool InitRandom(const char* seed, size_t len);
// Generates a (cryptographically) random string of the given length.
// We generate base64 values so that they will be printable.
std::string CreateRandomString(size_t length);
// Generates a (cryptographically) random string of the given length.
// We generate base64 values so that they will be printable.
// Return false if the random number generator failed.
bool CreateRandomString(size_t length, std::string* str);
// Generates a (cryptographically) random string of the given length,
// with characters from the given table. Return false if the random
// number generator failed.
// For ease of implementation, the function requires that the table
// size evenly divide 256; otherwise, it returns false.
bool CreateRandomString(size_t length, const std::string& table,
std::string* str);
// Generates (cryptographically) random data of the given length.
// Return false if the random number generator failed.
bool CreateRandomData(size_t length, std::string* data);
// Generates a (cryptographically) random UUID version 4 string.
std::string CreateRandomUuid();
// Generates a random id.
uint32_t CreateRandomId();
// Generates a 64 bit random id.
uint64_t CreateRandomId64();
// Generates a random id > 0.
uint32_t CreateRandomNonZeroId();
// Generates a random double between 0.0 (inclusive) and 1.0 (exclusive).
double CreateRandomDouble();
} // namespace rtc
#endif // WEBRTC_RTC_BASE_HELPERS_H_