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* Copyright 2004--2005, Google Inc.
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#ifndef TALK_BASE_HELPERS_H_
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#define TALK_BASE_HELPERS_H_
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#include "talk/base/basictypes.h"
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// For testing, we can return predictable data.
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void SetRandomTestMode(bool test);
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// Initializes the RNG, and seeds it with the specified entropy.
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bool InitRandom(int seed);
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bool InitRandom(const char* seed, size_t len);
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// Generates a (cryptographically) random string of the given length.
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// We generate base64 values so that they will be printable.
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// WARNING: could silently fail. Use the version below instead.
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std::string CreateRandomString(size_t length);
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// Generates a (cryptographically) random string of the given length.
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// We generate base64 values so that they will be printable.
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// Return false if the random number generator failed.
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bool CreateRandomString(size_t length, std::string* str);
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// Generates a (cryptographically) random string of the given length,
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// with characters from the given table. Return false if the random
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// number generator failed.
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bool CreateRandomString(size_t length, const std::string& table,
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// Generates a random id.
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uint32 CreateRandomId();
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// Generates a random id > 0.
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uint32 CreateRandomNonZeroId();
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// Generates a random double between 0.0 (inclusive) and 1.0 (exclusive).
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double CreateRandomDouble();
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} // namespace talk_base
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#endif // TALK_BASE_HELPERS_H_