如何为Dieharder测试工具编写并添加自定义RNG？

我正在编写一款伪随机数生成器（RNG），采用了3段式帐篷映射的算法，并且基于dieharder库的接口规范来开发，目前完成的代码片段如下：

#include <dieharder/libdieharder.h>

static unsigned long int tent3_get (void *vstate);
static double tent3_get_double (void *vstate);
static void tent3_set (void *vstate, unsigned long int s);

typedef struct { double seed; } tent3_state_t;

static unsigned long int tent3_get (void *vstate) {
 double nextx = seed;
 double current = nextx;
 if(current <= 1.0/3.0){
 nextx = 3.0 * current;
 }else if(current <= 2.0/3.0){
 nextx = 3.0 * current - 1.0;
 }else if(current <...

内容的提问来源于stack exchange，提问作者StarChar