fzy

terminal fuzzy finder picker
theft_mt.h

(1073B)
      1 #ifndef THEFT_MT_H
      2 #define THEFT_MT_H
      3 
      4 #include <stdint.h>
      5 
      6 /* Wrapper for Mersenne Twister.
      7  * See copyright and license in theft_mt.c, more details at:
      8  *     http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/emt.html
      9  *
     10  * The code has been modified to store internal state in heap/stack
     11  * allocated memory, rather than statically allocated memory, to allow
     12  * multiple instances running in the same address space. */
     13 
     14 #define THEFT_MT_PARAM_N 312
     15 
     16 struct theft_mt {
     17     uint64_t mt[THEFT_MT_PARAM_N]; /* the array for the state vector  */
     18     int16_t mti;
     19 };
     20 
     21 /* Heap-allocate a mersenne twister struct. */
     22 struct theft_mt *theft_mt_init(uint64_t seed);
     23 
     24 /* Free a heap-allocated mersenne twister struct. */
     25 void theft_mt_free(struct theft_mt *mt);
     26 
     27 /* Reset a mersenne twister struct, possibly stack-allocated. */
     28 void theft_mt_reset(struct theft_mt *mt, uint64_t seed);
     29 
     30 /* Get a 64-bit random number. */
     31 uint64_t theft_mt_random(struct theft_mt *mt);
     32 
     33 /* Generate a random number on [0,1]-real-interval. */
     34 double theft_mt_random_double(struct theft_mt *mt);
     35 
     36 #endif