src/bjprng.h

   1 /* coded by Ketmar // Vampire Avalon (psyc://ketmar.no-ip.org/~Ketmar)
   2  * Understanding is not required. Only obedience.
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17 #ifndef _BJPRNG_H_
  18 #define _BJPRNG_H_
  19
  20 #ifdef __cplusplus
  21 extern "C" {
  22 #endif
  23
  24 #include <stdint.h>
  25
  26
  27 ////////////////////////////////////////////////////////////////////////////////
  28 // by Bob Jenkins
  29 // public domain
  30 // http://burtleburtle.net/bob/rand/smallprng.html
  31 ////////////////////////////////////////////////////////////////////////////////
  32 typedef struct {
  33   uint32_t a, b, c, d;
  34 } BJRandCtx;
  35
  36
  37 extern uint32_t bjprngGenRandSeed (void);
  38
  39 extern uint32_t bjprngRand (BJRandCtx *x);
  40 extern void bjprngInit (BJRandCtx *x, uint32_t seed);
  41
  42
  43 #ifdef __cplusplus
  44 }
  45 #endif
  46 #endif