cleanup: move stuff to util & use struct for options

src/lib.rs

@@ -6,38 +6,32 @@
     bigint_helper_methods
 )]
 
-use std::{
-    fs,
-    io::{self, stdout, Write},
+use crate::{
+    processor::memory::Memory,
+    util::{pause, print_cycles},
 };
-
 use gilrs::Gilrs;
 use minifb::Window;
 use once_cell::sync::OnceCell;
 use processor::{memory::Rom, Cpu};
-
-use crate::processor::memory::Memory;
+use std::{
+    fs,
+    io::{stdout, Write},
+};
+use util::pause_then_step;
 
 mod constants;
 mod processor;
-mod util;
+pub mod util;
 
-#[macro_export]
-macro_rules! verbose_println {
-    ($($tts:tt)*) => {
-            if $crate::is_verbose() {
-                    println!($($tts)*);
-            }
-    };
-}
-
-#[macro_export]
-macro_rules! verbose_print {
-    ($($tts:tt)*) => {
-            if $crate::is_verbose() {
-                    print!($($tts)*);
-            }
-    };
+pub struct Options {
+    pub rom_path: String,
+    pub bootrom_path: Option<String>,
+    pub connect_serial: bool,
+    pub verbose: bool,
+    pub step_by: Option<usize>,
+    pub cycle_count: bool,
+    pub factor: usize,
 }
 
 static mut PAUSE_ENABLED: bool = false;
@@ -50,22 +44,12 @@ pub const HEIGHT: usize = 144;
 static FACTOR: OnceCell<usize> = OnceCell::new();
 
 #[allow(clippy::too_many_arguments)]
-pub fn init(
-    rom_path: String,
-    bootrom_path: Option<String>,
-    mut window: Window,
-    connect_serial: bool,
-    tile_window: bool,
-    verbose: bool,
-    step_by: Option<usize>,
-    cycle_count: bool,
-    factor: usize,
-) {
-    VERBOSE.set(verbose).unwrap();
-    FACTOR.set(factor).unwrap();
+pub fn init(options: Options, mut window: Window, tile_window: bool) {
+    VERBOSE.set(options.verbose).unwrap();
+    FACTOR.set(options.factor).unwrap();
     crate::processor::memory::mmio::gpu::init_statics();
 
-    let rom: Rom = match fs::read(rom_path) {
+    let rom: Rom = match fs::read(options.rom_path) {
         Ok(data) => Rom::load(data),
         Err(e) => {
             println!("Error reading ROM: {e}");
@@ -74,8 +58,8 @@ pub fn init(
     };
     window.set_title(format!("{} on {}", rom.get_title(), rom.mbc_type()).as_str());
 
-    let bootrom_enabled = bootrom_path.is_some();
-    let bootrom: Option<Vec<u8>> = if let Some(path) = bootrom_path {
+    let bootrom_enabled = options.bootrom_path.is_some();
+    let bootrom: Option<Vec<u8>> = if let Some(path) = options.bootrom_path {
         match fs::read(path) {
             Ok(data) => Some(data),
             Err(e) => {
@@ -88,7 +72,7 @@ pub fn init(
     };
 
     let mut cpu = Cpu::new(
-        Memory::init(bootrom, rom, window, connect_serial, tile_window),
+        Memory::init(bootrom, rom, window, options.connect_serial, tile_window),
         bootrom_enabled,
         Gilrs::new().unwrap(),
     );
@@ -96,11 +80,11 @@ pub fn init(
     let mut cycle_num = 0;
 
     verbose_println!("\n\n    Begin execution...\n");
-    match step_by {
+    match options.step_by {
         Some(step_size) => loop {
             for _ in 0..step_size {
                 cycle_num += 1;
-                if cycle_count {
+                if options.cycle_count {
                     print_cycles(&cycle_num);
                 }
                 run_cycle(&mut cpu);
@@ -111,7 +95,7 @@ pub fn init(
         },
         None => loop {
             cycle_num += 1;
-            if cycle_count {
+            if options.cycle_count {
                 print_cycles(&cycle_num);
             }
             run_cycle(&mut cpu);
@@ -130,46 +114,3 @@ fn run_cycle(cpu: &mut Cpu) {
         pause_then_step();
     }
 }
-
-fn pause_then_step() {
-    unsafe {
-        if PAUSE_ENABLED {
-            let line = pause();
-            PAUSE_QUEUED = !line.contains("continue");
-        }
-    }
-}
-
-#[allow(dead_code)]
-fn pause_once() {
-    println!("paused...");
-    pause();
-}
-
-fn pause() -> String {
-    let mut line = String::new();
-    match io::stdin().read_line(&mut line) {
-        Ok(_) => line,
-        Err(_) => String::from(""),
-    }
-}
-
-fn print_cycles(cycles: &i32) {
-    if *cycles % 45678 != 0 {
-        return;
-    }
-    let instructions_per_second = 400000;
-    print!(
-        "cycle {} - approx {} seconds on real hardware\r",
-        cycles,
-        cycles / instructions_per_second
-    );
-    stdout().flush().unwrap();
-}
-
-fn is_verbose() -> bool {
-    match VERBOSE.get() {
-        Some(v) => *v,
-        None => false,
-    }
-}

src/main.rs

@@ -3,8 +3,6 @@ use gb_emu::{HEIGHT, WIDTH};
 
 use minifb::{Window, WindowOptions};
 
-
-
 /// Gameboy (DMG-A/B/C) emulator
 #[derive(Parser, Debug)]
 #[command(author, version, about, long_about = None)]
@@ -66,15 +64,15 @@ fn main() {
 
     window.topmost(true);
 
-    gb_emu::init(
-        args.rom,
-        args.bootrom,
-        window,
-        args.connect_serial,
-        args.tile_window,
-        args.verbose,
-        args.step_by,
-        args.cycle_count,
+    let options = gb_emu::Options {
+        rom_path: args.rom,
+        bootrom_path: args.bootrom,
+        connect_serial: args.connect_serial,
+        verbose: args.verbose,
+        step_by: args.step_by,
+        cycle_count: args.cycle_count,
         factor,
-    );
+    };
+
+    gb_emu::init(options, window, args.tile_window);
 }

src/util.rs

@@ -1,5 +1,69 @@
-use crate::processor::Direction;
-use std::mem::transmute;
+use crate::{processor::Direction, PAUSE_ENABLED, PAUSE_QUEUED, VERBOSE};
+use std::{
+    io::{self, stdout, Write},
+    mem::transmute,
+};
+
+#[macro_export]
+macro_rules! verbose_println {
+    ($($tts:tt)*) => {
+            if $crate::util::is_verbose() {
+                    println!($($tts)*);
+            }
+    };
+}
+
+#[macro_export]
+macro_rules! verbose_print {
+    ($($tts:tt)*) => {
+            if $crate::util::is_verbose() {
+                    print!($($tts)*);
+            }
+    };
+}
+
+pub(crate) fn pause_then_step() {
+    unsafe {
+        if PAUSE_ENABLED {
+            let line = pause();
+            PAUSE_QUEUED = !line.contains("continue");
+        }
+    }
+}
+
+#[allow(dead_code)]
+pub(crate) fn pause_once() {
+    println!("paused...");
+    pause();
+}
+
+pub(crate) fn pause() -> String {
+    let mut line = String::new();
+    match io::stdin().read_line(&mut line) {
+        Ok(_) => line,
+        Err(_) => String::from(""),
+    }
+}
+
+pub(crate) fn print_cycles(cycles: &i32) {
+    if *cycles % 45678 != 0 {
+        return;
+    }
+    let instructions_per_second = 400000;
+    print!(
+        "cycle {} - approx {} seconds on real hardware\r",
+        cycles,
+        cycles / instructions_per_second
+    );
+    stdout().flush().unwrap();
+}
+
+pub(crate) fn is_verbose() -> bool {
+    match VERBOSE.get() {
+        Some(v) => *v,
+        None => false,
+    }
+}
 
 pub(crate) fn as_signed(unsigned: u8) -> i8 {
     unsafe { transmute(unsigned) }