third_party/WebKit/Source/platform/testing/TreeTestHelpers.h

   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
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  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 blink {
  37 namespace TreeTestHelpers {
  38
  39 // Initializes the pseudo-random number generator with a specific seed.
  40 void initRandom(const int32_t seed);
  41
  42 // Produces the next pseudo-random number in the sequence, in the
  43 // range from [0..maximumValue). Negative numbers are not allowed and will
  44 // produce undefined results.
  45 int32_t nextRandom(const int32_t maximumValue);
  46
  47 } // namespace TreeTestHelpers
  48 } // namespace blink
  49
  50 #endif // TreeTestHelpers_h