From ace046624d2e23fba67564a86af7f03ed8a48eae Mon Sep 17 00:00:00 2001
From: Freya Murphy <freya@freyacat.org>
Date: Thu, 29 Feb 2024 21:05:10 -0500
Subject: remove unwraps, fix utf8

---
 matrix-bin/src/main.rs | 90 ++++++++++++++++++++++++++------------------------
 1 file changed, 46 insertions(+), 44 deletions(-)

(limited to 'matrix-bin/src/main.rs')

diff --git a/matrix-bin/src/main.rs b/matrix-bin/src/main.rs
index 64d1b3f..8321796 100644
--- a/matrix-bin/src/main.rs
+++ b/matrix-bin/src/main.rs
@@ -1,4 +1,4 @@
-use std::{path::PathBuf, io::{self, Read, IsTerminal}, fs, cell::RefCell, rc::Rc};
+use std::{path::PathBuf, io::{self, Read, IsTerminal}, cell::RefCell, rc::Rc};
 use clap::{Parser as ArgParser, ColorChoice};
 use matrix_lang::prelude::*;
 use repl::Repl;
@@ -35,8 +35,8 @@ pub struct Args {
 
 pub enum Mode {
     Repl,
-    Execute(String),
-    Compile(String, PathBuf),
+    Execute(Vec<u8>),
+    Compile(Vec<u8>, PathBuf),
 }
 
 pub struct State<'a> {
@@ -46,18 +46,26 @@ pub struct State<'a> {
     color: bool,
 }
 
-impl<'a> State<'a> {
-    pub fn new (args: Args) -> (Self, Mode) {
+pub fn error(err: Exception, state: &State) {
+    if state.color {
+        println!("\x1b[31mError:\x1b[0m {err}");
+    } else {
+        println!("Error: {err}");
+    }
+}
 
-        let stdin = read_stdin();
+impl<'a> State<'a> {
+    pub fn new (args: Args) -> Result<(Self, Mode)> {
 
-        let file;
+        let mut buffer = Vec::new();
         if let Some(path) = &args.file {
-            file = Some(fs::read_to_string(path).unwrap());
-        } else if stdin.len() > 0 {
-            file = Some(stdin);
+            let mut f = File::open(path)?;
+            f.read_to_end(&mut buffer)?;
         } else {
-            file = None;
+            let mut stdin = io::stdin();
+            if !stdin.is_terminal() {
+                stdin.read_to_end(&mut buffer)?;
+            }
         }
 
         let mode;
@@ -74,11 +82,10 @@ impl<'a> State<'a> {
                     PathBuf::from("matc.out")
                 }
             };
-            let file = file.unwrap_or(String::new());
-            mode = Mode::Compile(file, path);
+            mode = Mode::Compile(buffer, path);
             repl = false;
-        } else if let Some(file) = file {
-            mode = Mode::Execute(file);
+        } else if buffer.len() > 0 {
+            mode = Mode::Execute(buffer);
             repl = false;
         } else {
             mode = Mode::Repl;
@@ -106,16 +113,16 @@ impl<'a> State<'a> {
             Some(ColorChoice::Never) => false,
         };
 
-        (Self {
+        Ok((Self {
             parser,
             vm: Rc::new(RefCell::new(vm)),
             compiler,
             color,
-        }, mode)
+        }, mode))
     }
 
     pub fn execute(&mut self, fun: Rc<Function>) -> Result<Value> {
-        let val = self.vm.try_borrow_mut().unwrap().run(fun)?;
+        let val = self.vm.borrow_mut().run(fun)?;
         Ok(val)
     }
 
@@ -125,47 +132,37 @@ impl<'a> State<'a> {
         Ok(fun)
     }
 
-    pub fn load_program(&mut self, body: String) -> Result<Rc<Function>> {
-        match Program::load(&body)? {
+    pub fn load_program(&mut self, mut buffer: Vec<u8>) -> Result<Rc<Function>> {
+        let res = Program::load(buffer.as_mut_slice())?;
+        match res {
             Some(fun) => {
                 Ok(fun)
             },
             None => {
+                let body = buffer_to_string(buffer)?;
                 self.compile(body)
             },
         }
     }
 }
 
-pub fn error(err: Exception, state: &State) {
-    if state.color {
-        println!("\x1b[31mError:\x1b[0m {err}");
-    } else {
-        println!("Error: {err}");
-    }
-}
-
-fn read_stdin() -> String {
-    let mut buffer = String::new();
-    let mut stdin = io::stdin();
-    if stdin.is_terminal() {
-        return String::new();
-    }
-    stdin.read_to_string(&mut buffer).unwrap();
-    buffer
+fn buffer_to_string(buffer: Vec<u8>) -> Result<String> {
+    String::from_utf8(buffer)
+        .map_err(|e| exception!(IO_EXCEPTION, "{e}"))
 }
 
 fn handle_mode(state: &mut State, mode: Mode) -> Result<()> {
     match mode {
         Mode::Repl => {
             let mut repl = Repl::new(state);
-            repl.run();
+            repl.run()?;
         },
-        Mode::Execute(body) => {
-            let fun = state.load_program(body)?;
+        Mode::Execute(buffer) => {
+            let fun = state.load_program(buffer)?;
             state.execute(fun)?;
         },
-        Mode::Compile(body, path) => {
+        Mode::Compile(buffer, path) => {
+            let body = buffer_to_string(buffer)?;
             let fun = state.compile(body)?;
             let mut file = File::create(path).map_err(|e|
                 exception!(IO_EXCEPTION, "{e}")
@@ -176,12 +173,17 @@ fn handle_mode(state: &mut State, mode: Mode) -> Result<()> {
     Ok(())
 }
 
-fn main() {
-
+fn load() -> Result<()> {
     let args = Args::parse();
-    let (mut state, mode) = State::new(args);
-
+    let (mut state, mode) = State::new(args)?;
     if let Err(e) = handle_mode(&mut state, mode) {
         error(e, &state);
     }
+    Ok(())
+}
+
+fn main() {
+    if let Err(e) = load() {
+        println!("\x1b[31mFatal:\x1b[0m {e}");
+    }
 }
-- 
cgit v1.2.3-freya