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added result_type, min() and max() methods

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This commit is contained in:
Ahmet Inan 2020-07-04 18:53:47 +02:00
commit 21a44acf4b
1 changed files with 36 additions and 0 deletions
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36
xorshift.hh
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@ -14,6 +14,15 @@ class Xorshift32
static const uint32_t Y = 2463534242;
uint32_t y_;
public:
typedef uint32_t result_type;
static constexpr result_type min()
{
return 0;
}
static constexpr result_type max()
{
return UINT32_MAX;
}
Xorshift32(uint32_t y = Y) : y_(y) {}
void reset(uint32_t y = Y)
{
@ -33,6 +42,15 @@ class Xorshift64
static const uint64_t X = 88172645463325252;
uint64_t x_;
public:
typedef uint64_t result_type;
static constexpr result_type min()
{
return 0;
}
static constexpr result_type max()
{
return UINT64_MAX;
}
Xorshift64(uint64_t x = X) : x_(x) {}
void reset(uint64_t x = X)
{
@ -57,6 +75,15 @@ class Xorwow
static const uint32_t D = 6615241;
uint32_t x_, y_, z_, w_, v_, d_;
public:
typedef uint32_t result_type;
static constexpr result_type min()
{
return 0;
}
static constexpr result_type max()
{
return UINT32_MAX;
}
Xorwow(uint32_t x = X, uint32_t y = Y,
uint32_t z = Z, uint32_t w = W,
uint32_t v = V, uint32_t d = D) :
@ -90,6 +117,15 @@ class Xorshift128
static const uint32_t W = 88675123;
uint32_t x_, y_, z_, w_;
public:
typedef uint32_t result_type;
static constexpr result_type min()
{
return 0;
}
static constexpr result_type max()
{
return UINT32_MAX;
}
Xorshift128(uint32_t x = X, uint32_t y = Y,
uint32_t z = Z, uint32_t w = W) :
x_(x), y_(y), z_(z), w_(w) {}