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rand: move dist functions to top module and PRNG interface; minor cleanup (#14481)

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This commit is contained in:
Subhomoy Haldar
2022-05-22 15:51:52 +05:30
committed by GitHub
parent 64a686f41f
commit 3647fb4def
13 changed files with 290 additions and 134 deletions
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8
vlib/rand/sys/system_rng.c.v
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@ -4,6 +4,7 @@
module sys
import math.bits
import rand.buffer
import rand.seed
// Implementation note:
@ -36,10 +37,9 @@ fn calculate_iterations_for(bits int) int {
// SysRNG is the PRNG provided by default in the libc implementiation that V uses.
pub struct SysRNG {
buffer.PRNGBuffer
mut:
seed u32 = seed.time_seed_32()
buffer int
bytes_left int
seed u32 = seed.time_seed_32()
}
// r.seed() sets the seed of the accepting SysRNG to the given data.
@ -71,7 +71,7 @@ pub fn (mut r SysRNG) u8() u8 {
r.buffer >>= 8
return value
}
r.buffer = r.default_rand()
r.buffer = u64(r.default_rand())
r.bytes_left = sys.rand_bytesize - 1
value := u8(r.buffer)
r.buffer >>= 8