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mod lexer;
mod parser;
use std::fs::File;
use std::io::{Write, BufRead, BufReader};
use clap::Parser;
use parser::Program;
pub(crate) type Word = i64;
static PROGRAM_COUNTER: usize = 3;
#[derive(Parser, Debug)]
#[command(about, long_about = None)]
struct Args {
/// Path to source file
source: String,
/// Assembled binary output path
#[arg(default_value = "program.bin")]
destination: String,
/// Where the first actual byte to be
#[arg(short, long, default_value_t = 1024)]
start_index: usize,
/// Show intermediate representations
#[arg(long, default_value_t = false)]
debug: bool,
}
fn main() {
let args = Args::parse();
/* Read */
let file = File::open(args.source).unwrap();
let lines = BufReader::new(file).lines();
/* Lex */
let mut tokens = Vec::new();
for line in lines.map_while(Result::ok) {
tokens.extend(lexer::split(line));
}
if args.debug {
println!("\n### Lexed tokens ###\n");
println!("{:#?}", tokens);
}
/* Parse */
let mut prog = Program::new(tokens, args.start_index);
if args.debug {
println!("\n### Parsed tokens ###\n");
prog.print(0);
}
/* Semantic analysis */
prog.remove_definition_addresses();
if args.debug {
println!("\n### After remove_definition_addresses ###\n");
prog.print(0);
}
prog.analyze();
/* Intermediate code gen */
prog.collapse_instructions();
if args.debug {
println!("\n### After first collapse_instructions ###\n");
prog.print(0);
}
prog.collapse_instructions();
if args.debug {
println!("\n### After second collapse_instructions ###\n");
prog.print(0);
}
/* Machine code gen */
prog.instructions_to_constants();
if args.debug {
println!("\n### After instructions_to_constants ###\n");
prog.print(args.start_index);
}
let binary = prog.to_bytes(PROGRAM_COUNTER);
let mut out = File::create(args.destination).unwrap();
out.write_all(&binary).unwrap();
}
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