Function math_zrand_float 

pub fn math_zrand_float() -> f64

math_zrand_float() math function. Port of math_zrand_float(UNUSED(char *name), UNUSED(int argc), UNUSED(mnumber *argv), UNUSED(int id)) from Src/Modules/random.c:204 — the C source’s math-function entry point that returns a uniform double in [0, 1).

C body (verbatim): r = random_real(); if (r < 0) { zwarnnam(name, “Failed to get sufficient random data.”); } ret.type = MN_FLOAT; ret.u.d = r; return ret;

random_real returns -1 (via the thread_local sentinel set in random_real.rs) when the entropy syscall fails. C warns then still returns -1 as the math-function result; prior Rust port skipped the warn so callers had no signal that [[ $((zrand_float())) ]] produced a sentinel instead of a real probability. WARNING: param names don’t match C — Rust=() vs C=(name, argc, argv, id)