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rand: move constants from rand.util to a new module rand.constants (#8408)

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This commit is contained in:
Subhomoy Haldar
2021-01-29 15:27:30 +05:30
committed by GitHub
parent d012f2713b
commit c5a18812e2
7 changed files with 36 additions and 33 deletions
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12
vlib/rand/wyrand/wyrand.v
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@@ -5,7 +5,7 @@ module wyrand
import math.bits
import rand.seed
import rand.util
import rand.constants
import hash
// Redefinition of some constants that we will need for pseudorandom number generation.
@@ -40,7 +40,7 @@ pub fn (mut rng WyRandRNG) u32() u32 {
return rng.extra
}
full_value := rng.u64()
lower := u32(full_value & util.lower_mask)
lower := u32(full_value & constants.lower_mask)
upper := u32(full_value >> 32)
rng.extra = upper
rng.has_extra = true
@@ -149,13 +149,13 @@ pub fn (mut rng WyRandRNG) i64() i64 {
// int31 returns a positive pseudorandom 31-bit `int`.
[inline]
pub fn (mut rng WyRandRNG) int31() int {
return int(rng.u32() & util.u31_mask) // Set the 32nd bit to 0.
return int(rng.u32() & constants.u31_mask) // Set the 32nd bit to 0.
}
// int63 returns a positive pseudorandom 63-bit `i64`.
[inline]
pub fn (mut rng WyRandRNG) int63() i64 {
return i64(rng.u64() & util.u63_mask) // Set the 64th bit to 0.
return i64(rng.u64() & constants.u63_mask) // Set the 64th bit to 0.
}
// intn returns a pseudorandom `int` in range `[0, max)`.
@@ -202,13 +202,13 @@ pub fn (mut rng WyRandRNG) i64_in_range(min i64, max i64) i64 {
// f32 returns a pseudorandom `f32` value in range `[0, 1)`.
[inline]
pub fn (mut rng WyRandRNG) f32() f32 {
return f32(rng.u32()) / util.max_u32_as_f32
return f32(rng.u32()) / constants.max_u32_as_f32
}
// f64 returns a pseudorandom `f64` value in range `[0, 1)`.
[inline]
pub fn (mut rng WyRandRNG) f64() f64 {
return f64(rng.u64()) / util.max_u64_as_f64
return f64(rng.u64()) / constants.max_u64_as_f64
}
// f32n returns a pseudorandom `f32` value in range `[0, max)`.