1 /* 2 * Copyright (C) 2010 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 17 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 18 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 20 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 21 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 // Simple pseudorandom number generator helper functions, used by the 27 // red-black and interval tree tests. 28 // 29 // These are **not** thread safe! 30 31 #ifndef TreeTestHelpers_h 32 #define TreeTestHelpers_h 33 34 #include <stdint.h> 35 36 namespace WebCore { 37 namespace TreeTestHelpers { 38 39 // Generates a seed value to be passed to initRandom(). 40 int32_t generateSeed(); 41 42 // Initializes the pseudo-random number generator with a specific seed. 43 void initRandom(const int32_t seed); 44 45 // Produces the next pseudo-random number in the sequence, in the 46 // range from [0..maximumValue). Negative numbers are not allowed and will 47 // produce undefined results. 48 int32_t nextRandom(const int32_t maximumValue); 49 50 } // namespace TreeTestHelpers 51 } // namespace WebCore 52 53 #endif // TreeTestHelpers_h 54
