pcg_basic.h 1.4 KB

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  1. /*
  2. * PCG Random Number Generation for C.
  3. *
  4. * Copyright 2014 Melissa O'Neill <oneill@pcg-random.org>
  5. *
  6. * Licensed under the Apache License, Version 2.0 (the "License");
  7. * you may not use this file except in compliance with the License.
  8. * You may obtain a copy of the License at
  9. *
  10. * http://www.apache.org/licenses/LICENSE-2.0
  11. *
  12. * Unless required by applicable law or agreed to in writing, software
  13. * distributed under the License is distributed on an "AS IS" BASIS,
  14. * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15. * See the License for the specific language governing permissions and
  16. * limitations under the License.
  17. *
  18. * For additional information about the PCG random number generation scheme,
  19. * including its license and other licensing options, visit
  20. *
  21. * http://www.pcg-random.org
  22. */
  23. #ifndef PCG_BASIC_H_INCLUDED
  24. #define PCG_BASIC_H_INCLUDED 1
  25. #include "ms_stdint.h"
  26. #ifdef __cplusplus
  27. extern "C" {
  28. #endif
  29. typedef struct pcg_state_setseq_64 {
  30. uint64_t state; // RNG state. All values are possible.
  31. uint64_t inc; // Controls which RNG sequence (stream) is selected. Must *always* be odd.
  32. } pcg32_random_t;
  33. #define PCG32_INITIALIZER { 0x853c49e6748fea9bULL, 0xda3e39cb94b95bdbULL }
  34. void pcg32_srandom_r(pcg32_random_t* rng, uint64_t initial_state, uint64_t initseq);
  35. uint32_t pcg32_random_r(pcg32_random_t* rng);
  36. #ifdef __cplusplus
  37. }
  38. #endif
  39. #endif // PCG_BASIC_H_INCLUDED