/* * libjingle * Copyright 2004--2005, Google Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef TALK_BASE_HELPERS_H_ #define TALK_BASE_HELPERS_H_ #include <string> #include "talk/base/basictypes.h" namespace talk_base { // 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. // WARNING: could silently fail. Use the version below instead. 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. bool CreateRandomString(size_t length, const std::string& table, std::string* str); // Generates a random id. uint32 CreateRandomId(); // Generates a 64 bit random id. uint64 CreateRandomId64(); // Generates a random id > 0. uint32 CreateRandomNonZeroId(); // Generates a random double between 0.0 (inclusive) and 1.0 (exclusive). double CreateRandomDouble(); } // namespace talk_base #endif // TALK_BASE_HELPERS_H_