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mymt.h

解説を見る。

/*
    fast Mersenne Twister routine for Pentium4
    2002/10/19
    MITSUNARI Shigeo(herumi@nifty.com)
    original source is http://www.math.keio.ac.jp/matumoto/emt.html
 */
#ifndef MY_MT_H_
#define MY_MT_H_

#ifdef __cplusplus
extern "C" {
#endif

typedef struct {
    unsigned int state[624];
    unsigned int output[624];
    unsigned int index;
    char *mallocPtr;
} myMT_t;

#ifdef _MSC_VER
    #define MYMT_EXPORT __declspec(dllexport) 
#else
    #define MYMT_EXPORT
#endif

/*
    initialize for myMT
    return the handle of myMT
    this library is reentrant
*/
MYMT_EXPORT myMT_t *myMT_Init(void);

/*
    set the seed of MT
*/
MYMT_EXPORT void myMT_SetSeed(myMT_t *mt, unsigned int seed);

/*
    set the large seed of MT
    0 < seedNum <= 624
*/
MYMT_EXPORT void myMT_SetSeeds(myMT_t *mt, unsigned int *seed, int seedNum);

/*
    free of the handle of myMT
*/
MYMT_EXPORT void myMT_Term(myMT_t *mt);

MYMT_EXPORT extern void (*myMT_Next)(myMT_t *mt);

/* generates a random number on [0,0xffffffff]-interval */
/* You may call myMT_Next_SSE2 insted of myMT_Next if you use this on only Pentium 4 */
#define myMT_GetInt32(mt) (((mt->index == 624) ? myMT_Next(mt), 0 : 0), mt->output[mt->index++])

#ifdef __cplusplus
}
#endif

#endif /* MY_MT_H_ */

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