From 0e5ca8a5743cff877fd84e0a18d02e669c3af5b0 Mon Sep 17 00:00:00 2001
From: Jeeves <guydoodlesdev@gmail.com>
Date: Sun, 21 Apr 2024 07:04:15 -0600
Subject: [PATCH] rom arg

---
 src/main.zig | 39 ++++++++++++++++++++++++++-------------
 1 file changed, 26 insertions(+), 13 deletions(-)

diff --git a/src/main.zig b/src/main.zig
index ddf1e74..96b0187 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -1,21 +1,34 @@
 const std = @import("std");
 
 pub fn main() !void {
-    // var gpa = std.heap.GeneralPurposeAllocator(.{}){};
-    // defer _ = gpa.deinit();
-    // const allocator = gpa.allocator();
+    var gpa = std.heap.GeneralPurposeAllocator(.{}){};
+    defer _ = gpa.deinit();
+    const allocator = gpa.allocator();
 
-    const mem: [0xFFFF]u8 = undefined;
-    const ws: [0xFF]u8 = undefined;
-    const rs: [0xFF]u8 = undefined;
-    var uxn = Uxn{
-        .mem = .{ .m = mem },
-        .ws = .{ .s = ws },
-        .rs = .{ .s = rs },
-        .pc = 0x100,
-    };
+    var args = try std.process.argsWithAllocator(allocator);
+    defer args.deinit();
+    _ = args.next();
+    const rom_path = args.next();
 
-    while (true) uxn.loop();
+    if (rom_path) |path| {
+        var file = try std.fs.cwd().openFile(path, .{});
+        defer file.close();
+        const rom = try file.readToEndAlloc(allocator, 0xFFFF);
+        defer allocator.free(rom);
+
+        const mem: [0xFFFF]u8 = undefined;
+        const ws: [0xFF]u8 = undefined;
+        const rs: [0xFF]u8 = undefined;
+        var uxn = Uxn{
+            .mem = .{ .m = mem },
+            .ws = .{ .s = ws },
+            .rs = .{ .s = rs },
+            .pc = 0x100,
+        };
+        @memcpy(uxn.mem.m[0x100 .. 0x100 + rom.len], rom);
+
+        while (true) uxn.loop();
+    } else return error.NoRom;
 }
 
 pub const Uxn = struct {