some prototype mini utils

math/str2int/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "str2int"
+version = "0.1.0"
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+nested = { path = "../../nested" }

math/str2int/src/main.rs

@@ -0,0 +1,40 @@
+
+use std::{
+    fs::File,
+    io::{Read, Write},
+    os::unix::io::FromRawFd
+};
+
+fn main() {
+    nested::magic_header();
+    eprintln!("       Parse MachineInt from String");
+    nested::magic_header();
+
+    let mut f0 = unsafe { File::from_raw_fd(0) };
+    eprintln!("
+> 0:
+  ( ℕ )
+  ( Sequence (Digit 10) )
+  ( Sequence ASCII )
+  ( Sequence MachineSlab )
+  ( Pipe Shot (Sequence MachineSlab) )
+");
+
+    let mut f1 = unsafe { File::from_raw_fd(1) };
+    eprintln!("
+< 1:
+  ( ℕ )
+  ( MachineInt )
+  ( MachineWord )
+  ( Array 8 MachineSlab )
+  ( Pipe Shot (Array 8 MachineSlab) )
+");
+
+    nested::magic_header();
+
+    let mut chars = Vec::new();
+    f0.read_to_end(&mut chars);
+    chars.retain(|c| (*c as char).is_numeric());
+    f1.write(&u64::from_str_radix(&String::from_utf8_lossy(&chars), 10).unwrap().to_le_bytes());
+}
+