Home | History | Annotate | Download | only in base
      1 /*
      2  * libjingle
      3  * Copyright 2004--2005, Google Inc.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions are met:
      7  *
      8  *  1. Redistributions of source code must retain the above copyright notice,
      9  *     this list of conditions and the following disclaimer.
     10  *  2. Redistributions in binary form must reproduce the above copyright notice,
     11  *     this list of conditions and the following disclaimer in the documentation
     12  *     and/or other materials provided with the distribution.
     13  *  3. The name of the author may not be used to endorse or promote products
     14  *     derived from this software without specific prior written permission.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
     17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
     19  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     20  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
     22  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     23  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     24  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
     25  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #ifndef TALK_BASE_HELPERS_H_
     29 #define TALK_BASE_HELPERS_H_
     30 
     31 #include <string>
     32 #include "talk/base/basictypes.h"
     33 
     34 namespace talk_base {
     35 
     36 // For testing, we can return predictable data.
     37 void SetRandomTestMode(bool test);
     38 
     39 // Initializes the RNG, and seeds it with the specified entropy.
     40 bool InitRandom(int seed);
     41 bool InitRandom(const char* seed, size_t len);
     42 
     43 // Generates a (cryptographically) random string of the given length.
     44 // We generate base64 values so that they will be printable.
     45 // WARNING: could silently fail. Use the version below instead.
     46 std::string CreateRandomString(size_t length);
     47 
     48 // Generates a (cryptographically) random string of the given length.
     49 // We generate base64 values so that they will be printable.
     50 // Return false if the random number generator failed.
     51 bool CreateRandomString(size_t length, std::string* str);
     52 
     53 // Generates a random id.
     54 uint32 CreateRandomId();
     55 
     56 // Generates a random id > 0.
     57 uint32 CreateRandomNonZeroId();
     58 
     59 }  // namespace talk_base
     60 
     61 #endif  // TALK_BASE_HELPERS_H_
     62