Remove dependency to the rand crate

This dependency was easily avoidable and it brought with it a lot of
inner dependencies of its own, most notably 'zerocopy-derive', which
forbid us to compile the affected programs purely statically.

Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>

6 files changed, 20 insertions, 195 deletions

diff --git a/Cargo.lock b/Cargo.lock
index 8c3ad03..ab5483d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -52,18 +52,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "byteorder"
-version = "1.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1fd0f2584146f6f2ef48085050886acf353beff7305ebd1ae69500e27c67f64b"
-
-[[package]]
-name = "cfg-if"
-version = "1.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
-
-[[package]]
 name = "clap"
 version = "4.5.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -116,17 +104,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5443807d6dff69373d433ab9ef5378ad8df50ca6298caf15de6e52e24aaf54d5"
 
 [[package]]
-name = "getrandom"
-version = "0.2.15"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c4567c8db10ae91089c99af84c68c38da3ec2f087c3f82960bcdbf3656b6f4d7"
-dependencies = [
- "cfg-if",
- "libc",
- "wasi",
-]
-
-[[package]]
 name = "hashbrown"
 version = "0.15.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -165,12 +142,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bbd2bcb4c963f2ddae06a2efc7e9f3591312473c50c6685e1f298068316e66fe"
 
 [[package]]
-name = "libc"
-version = "0.2.169"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b5aba8db14291edd000dfcc4d620c7ebfb122c613afb886ca8803fa4e128a20a"
-
-[[package]]
 name = "memchr"
 version = "2.7.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -199,15 +170,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "ppv-lite86"
-version = "0.2.20"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "77957b295656769bb8ad2b6a6b09d897d94f05c41b069aede1fcdaa675eaea04"
-dependencies = [
- "zerocopy",
-]
-
-[[package]]
 name = "proc-macro2"
 version = "1.0.89"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -226,36 +188,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "rand"
-version = "0.8.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "34af8d1a0e25924bc5b7c43c079c942339d8f0a8b57c39049bef581b46327404"
-dependencies = [
- "libc",
- "rand_chacha",
- "rand_core",
-]
-
-[[package]]
-name = "rand_chacha"
-version = "0.3.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e6c10a63a0fa32252be49d21e7709d4d4baf8d231c2dbce1eaa8141b9b127d88"
-dependencies = [
- "ppv-lite86",
- "rand_core",
-]
-
-[[package]]
-name = "rand_core"
-version = "0.6.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
-dependencies = [
- "getrandom",
-]
-
-[[package]]
 name = "readrom"
 version = "1.0.0"
 dependencies = [
@@ -357,12 +289,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "06abde3611657adf66d383f00b093d7faecc7fa57071cce2578660c9f1010821"
 
 [[package]]
-name = "wasi"
-version = "0.11.0+wasi-snapshot-preview1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
-
-[[package]]
 name = "windows-sys"
 version = "0.59.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -449,7 +375,6 @@ name = "xa65"
 version = "0.1.0"
 dependencies = [
  "clap",
- "rand",
 ]
 
 [[package]]
@@ -457,27 +382,5 @@ name = "xixanta"
 version = "0.1.0"
 dependencies = [
  "lazy_static",
- "rand",
  "toml",
 ]
-
-[[package]]
-name = "zerocopy"
-version = "0.7.35"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1b9b4fd18abc82b8136838da5d50bae7bdea537c574d8dc1a34ed098d6c166f0"
-dependencies = [
- "byteorder",
- "zerocopy-derive",
-]
-
-[[package]]
-name = "zerocopy-derive"
-version = "0.7.35"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fa4f8080344d4671fb4e831a13ad1e68092748387dfc4f55e356242fae12ce3e"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
-]
diff --git a/crates/xa65/Cargo.toml b/crates/xa65/Cargo.toml
index a6696bd..1ecceb0 100644
--- a/crates/xa65/Cargo.toml
+++ b/crates/xa65/Cargo.toml
@@ -6,4 +6,3 @@ authors = ["Miquel Sabaté Solà <mikisabate@gmail.com>"]
 
 [dependencies]
 clap = { version = "^4", features = ["derive"] }
-rand = "0.8.5"
diff --git a/crates/xa65/src/main.rs b/crates/xa65/src/main.rs
index 5d46ec1..8a31e7b 100644
--- a/crates/xa65/src/main.rs
+++ b/crates/xa65/src/main.rs
@@ -1,5 +1,4 @@
 use clap::Parser as ClapParser;
-use rand::distributions::{Alphanumeric, DistString};
 use std::path::PathBuf;
 use std::process::Command;
 
@@ -63,6 +62,15 @@ fn get_binaries() -> Result<(PathBuf, PathBuf), String> {
     Ok((nasm, cl65))
 }
 
+// Returns the path to the temporary directory that can be used for the run.
+fn temporary_dir() -> PathBuf {
+    let tmp = &std::env::temp_dir();
+    let paths = std::fs::read_dir(tmp).unwrap();
+    let name = format!("xa65-{}", paths.count());
+
+    tmp.join(name)
+}
+
 fn main() {
     // Make sure that the binaries are there.
     let (nasm, cl65) = match get_binaries() {
@@ -87,8 +95,7 @@ fn main() {
 
     // Generate a temporary directory in which both binary files will be placed
     // as an intermediate step.
-    let random_string = &Alphanumeric.sample_string(&mut rand::thread_rng(), 16);
-    let dir = std::env::temp_dir().join(random_string);
+    let dir = temporary_dir();
     if let Err(e) = std::fs::create_dir(&dir) {
         die(e.to_string());
         return;
diff --git a/lib/xixanta/Cargo.toml b/lib/xixanta/Cargo.toml
index 6d2c66a..ada2ded 100644
--- a/lib/xixanta/Cargo.toml
+++ b/lib/xixanta/Cargo.toml
@@ -11,4 +11,3 @@ rust-version.workspace = true
 [dependencies]
 lazy_static = "1.5.0"
 toml = { version = "0.8", features = ["preserve_order"] }
-rand = "0.8.5"
diff --git a/lib/xixanta/fuzz/Cargo.lock b/lib/xixanta/fuzz/Cargo.lock
index 5122055..eb897dd 100644
--- a/lib/xixanta/fuzz/Cargo.lock
+++ b/lib/xixanta/fuzz/Cargo.lock
@@ -9,12 +9,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7d5a26814d8dcb93b0e5a0ff3c6d80a8843bafb21b39e8e18a6f05471870e110"
 
 [[package]]
-name = "byteorder"
-version = "1.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1fd0f2584146f6f2ef48085050886acf353beff7305ebd1ae69500e27c67f64b"
-
-[[package]]
 name = "cc"
 version = "1.1.28"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -26,29 +20,12 @@ dependencies = [
 ]
 
 [[package]]
-name = "cfg-if"
-version = "1.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
-
-[[package]]
 name = "equivalent"
 version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5443807d6dff69373d433ab9ef5378ad8df50ca6298caf15de6e52e24aaf54d5"
 
 [[package]]
-name = "getrandom"
-version = "0.2.15"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c4567c8db10ae91089c99af84c68c38da3ec2f087c3f82960bcdbf3656b6f4d7"
-dependencies = [
- "cfg-if",
- "libc",
- "wasi",
-]
-
-[[package]]
 name = "hashbrown"
 version = "0.15.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -109,15 +86,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1261fe7e33c73b354eab43b1273a57c8f967d0391e80353e51f764ac02cf6775"
 
 [[package]]
-name = "ppv-lite86"
-version = "0.2.20"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "77957b295656769bb8ad2b6a6b09d897d94f05c41b069aede1fcdaa675eaea04"
-dependencies = [
- "zerocopy",
-]
-
-[[package]]
 name = "proc-macro2"
 version = "1.0.92"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -136,36 +104,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "rand"
-version = "0.8.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "34af8d1a0e25924bc5b7c43c079c942339d8f0a8b57c39049bef581b46327404"
-dependencies = [
- "libc",
- "rand_chacha",
- "rand_core",
-]
-
-[[package]]
-name = "rand_chacha"
-version = "0.3.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e6c10a63a0fa32252be49d21e7709d4d4baf8d231c2dbce1eaa8141b9b127d88"
-dependencies = [
- "ppv-lite86",
- "rand_core",
-]
-
-[[package]]
-name = "rand_core"
-version = "0.6.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
-dependencies = [
- "getrandom",
-]
-
-[[package]]
 name = "serde"
 version = "1.0.216"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -253,12 +191,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "adb9e6ca4f869e1180728b7950e35922a7fc6397f7b641499e8f3ef06e50dc83"
 
 [[package]]
-name = "wasi"
-version = "0.11.0+wasi-snapshot-preview1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
-
-[[package]]
 name = "winnow"
 version = "0.6.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -272,7 +204,6 @@ name = "xixanta"
 version = "0.1.0"
 dependencies = [
  "lazy_static",
- "rand",
  "toml",
 ]
 
@@ -283,24 +214,3 @@ dependencies = [
  "libfuzzer-sys",
  "xixanta",
 ]
-
-[[package]]
-name = "zerocopy"
-version = "0.7.35"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1b9b4fd18abc82b8136838da5d50bae7bdea537c574d8dc1a34ed098d6c166f0"
-dependencies = [
- "byteorder",
- "zerocopy-derive",
-]
-
-[[package]]
-name = "zerocopy-derive"
-version = "0.7.35"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fa4f8080344d4671fb4e831a13ad1e68092748387dfc4f55e356242fae12ce3e"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
-]
diff --git a/lib/xixanta/src/parser.rs b/lib/xixanta/src/parser.rs
index 0a4d2b8..d508003 100644
--- a/lib/xixanta/src/parser.rs
+++ b/lib/xixanta/src/parser.rs
@@ -1,7 +1,6 @@
 use crate::node::{ControlType, NodeBodyType, NodeType, OperationType, PNode, PString};
 use crate::opcodes::{CONTROL_FUNCTIONS, INSTRUCTIONS};
 use crate::{Error, SourceInfo};
-use rand::distributions::{Alphanumeric, DistString};
 use std::cmp::Ordering;
 use std::io::{self, BufRead, Read};
 use std::path;
@@ -61,6 +60,12 @@ pub struct Parser {
     /// look ahead to know where the literal ends before dealing with further
     /// operators.
     look_ahead_index: usize,
+
+    /// Number that keeps track of random identifiers being generated so far.
+    /// This is because certain anonymous identifiers are not to be exposed to
+    /// the human eye, and we just care about them being unique. Hence this
+    /// counter.
+    generated_identifiers: usize,
 }
 
 impl Parser {
@@ -1338,8 +1343,10 @@ impl Parser {
     }
 
     // Generate a unique identifier with the given prefix.
-    fn unique_identifier(&self, prefix: String) -> String {
-        prefix + &String::from("-") + &Alphanumeric.sample_string(&mut rand::thread_rng(), 16)
+    fn unique_identifier(&mut self, prefix: String) -> String {
+        let res = prefix + &String::from("-") + &self.generated_identifiers.to_string();
+        self.generated_identifiers += 1;
+        res
     }
 
     // Returns a NodeType::Control node with whatever could be parsed