upgrade rand

Cargo.lock

@@ -2,6 +2,12 @@
 # It is not intended for manual editing.
 version = 4
 
+[[package]]
+name = "bitflags"
+version = "2.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c8214115b7bf84099f1309324e63141d4c5d7cc26862f97a0a857dbefe165bd"
+
 [[package]]
 name = "byteorder"
 version = "1.5.0"
@@ -23,12 +29,13 @@ checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
 [[package]]
 name = "getrandom"
-version = "0.2.15"
+version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c4567c8db10ae91089c99af84c68c38da3ec2f087c3f82960bcdbf3656b6f4d7"
+checksum = "73fea8450eea4bac3940448fb7ae50d91f034f941199fcd9d909a5a07aa455f0"
 dependencies = [
  "cfg-if",
  "libc",
+ "r-efi",
  "wasi",
 ]
 
@@ -44,7 +51,7 @@ version = "0.2.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "77957b295656769bb8ad2b6a6b09d897d94f05c41b069aede1fcdaa675eaea04"
 dependencies = [
- "zerocopy",
+ "zerocopy 0.7.35",
 ]
 
 [[package]]
@@ -66,21 +73,27 @@ dependencies = [
 ]
 
 [[package]]
-name = "rand"
-version = "0.8.5"
+name = "r-efi"
+version = "5.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "34af8d1a0e25924bc5b7c43c079c942339d8f0a8b57c39049bef581b46327404"
+checksum = "74765f6d916ee2faa39bc8e68e4f3ed8949b48cccdac59983d287a7cb71ce9c5"
+
+[[package]]
+name = "rand"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3779b94aeb87e8bd4e834cee3650289ee9e0d5677f976ecdb6d219e5f4f6cd94"
 dependencies = [
- "libc",
  "rand_chacha",
  "rand_core",
+ "zerocopy 0.8.23",
 ]
 
 [[package]]
 name = "rand_chacha"
-version = "0.3.1"
+version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e6c10a63a0fa32252be49d21e7709d4d4baf8d231c2dbce1eaa8141b9b127d88"
+checksum = "d3022b5f1df60f26e1ffddd6c66e8aa15de382ae63b3a0c1bfc0e4d3e3f325cb"
 dependencies = [
  "ppv-lite86",
  "rand_core",
@@ -88,9 +101,9 @@ dependencies = [
 
 [[package]]
 name = "rand_core"
-version = "0.6.4"
+version = "0.9.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
+checksum = "99d9a13982dcf210057a8a78572b2217b667c3beacbf3a0d8b454f6f82837d38"
 dependencies = [
  "getrandom",
 ]
@@ -114,9 +127,21 @@ checksum = "adb9e6ca4f869e1180728b7950e35922a7fc6397f7b641499e8f3ef06e50dc83"
 
 [[package]]
 name = "wasi"
-version = "0.11.0+wasi-snapshot-preview1"
+version = "0.14.2+wasi-0.2.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
+checksum = "9683f9a5a998d873c0d21fcbe3c083009670149a8fab228644b8bd36b2c48cb3"
+dependencies = [
+ "wit-bindgen-rt",
+]
+
+[[package]]
+name = "wit-bindgen-rt"
+version = "0.39.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6f42320e61fe2cfd34354ecb597f86f413484a798ba44a8ca1165c58d42da6c1"
+dependencies = [
+ "bitflags",
+]
 
 [[package]]
 name = "zerocopy"
@@ -125,7 +150,16 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1b9b4fd18abc82b8136838da5d50bae7bdea537c574d8dc1a34ed098d6c166f0"
 dependencies = [
  "byteorder",
- "zerocopy-derive",
+ "zerocopy-derive 0.7.35",
+]
+
+[[package]]
+name = "zerocopy"
+version = "0.8.23"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fd97444d05a4328b90e75e503a34bad781f14e28a823ad3557f0750df1ebcbc6"
+dependencies = [
+ "zerocopy-derive 0.8.23",
 ]
 
 [[package]]
@@ -138,3 +172,14 @@ dependencies = [
  "quote",
  "syn",
 ]
+
+[[package]]
+name = "zerocopy-derive"
+version = "0.8.23"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6352c01d0edd5db859a63e2605f4ea3183ddbd15e2c4a9e7d32184df75e4f154"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "c64-maze"
 version = "0.1.0"
-edition = "2021"
+edition = "2024"
 
 [dependencies]
-rand = { version = "0.8.5", features = ["small_rng", "std_rng"] }
+rand = { version = "0.9.0", features = ["small_rng", "std_rng"] }

src/main.rs

@@ -1,19 +1,16 @@
 use std::io::{self, BufWriter, Write};
 
-use rand::{rngs::SmallRng, Rng, SeedableRng};
+use rand::{distr::StandardUniform, rngs::SmallRng, Rng, SeedableRng};
 
 fn main() {
     let mut stdout = BufWriter::new(io::stdout().lock());
-    let mut rng = SmallRng::from_entropy();
-    let mut bits = [0u64; 8192];
-    loop {
-        rng.fill(&mut bits[..]);
-        for bits in bits {
-            for i in 0..64 {
-                let bit = (bits >> i) & 1;
-                let c = if bit == 0 { b'/' } else { b'\\' };
-                let _ = stdout.write_all(&[c]);
-            }
+    let rng = SmallRng::from_os_rng();
+
+    for bits in rng.sample_iter::<u64, _>(StandardUniform) {
+        for i in 0..64 {
+            let bit = (bits >> i) & 1;
+            let c = if bit == 0 { b'/' } else { b'\\' };
+            let _ = stdout.write_all(&[c]);
         }
     }
 }