henrike@webrtc.org | 0e118e7 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 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 (cryptographically) random string of the given length, |
| 54 | // with characters from the given table. Return false if the random |
| 55 | // number generator failed. |
| 56 | bool CreateRandomString(size_t length, const std::string& table, |
| 57 | std::string* str); |
| 58 | |
| 59 | // Generates a random id. |
| 60 | uint32 CreateRandomId(); |
| 61 | |
| 62 | // Generates a 64 bit random id. |
| 63 | uint64 CreateRandomId64(); |
| 64 | |
| 65 | // Generates a random id > 0. |
| 66 | uint32 CreateRandomNonZeroId(); |
| 67 | |
| 68 | // Generates a random double between 0.0 (inclusive) and 1.0 (exclusive). |
| 69 | double CreateRandomDouble(); |
| 70 | |
| 71 | } // namespace talk_base |
| 72 | |
| 73 | #endif // TALK_BASE_HELPERS_H_ |