1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
|
use anyhow::{bail, Context, Result};
use clap::Parser as ClapParser;
use std::fs::File;
use std::io::{self, Read, Write};
use std::path::Path;
use xixanta::assembler::Assembler;
use xixanta::mapping::{Mapping, EMPTY, NROM, NROM65};
/// Assembler for the 6502 microprocessor that targets the NES/Famicom.
#[derive(ClapParser, Debug)]
#[command(version, about, long_about = None)]
struct Args {
/// Assemble the instructions given on this file. The standard input is used
/// when this argument is not given.
file: Option<String>,
/// Linker configuration to be used. Defaults to 'nrom'.
#[arg(short = 'c', long)]
config: Option<String>,
/// Place the output into the given <OUT> file. Ignored if the `stdout` flag
/// is provided. Defaults to `out.nes`.
#[arg(short = 'o', long)]
out: Option<String>,
/// Treat warnings as errors.
#[arg(short = 'W', value_name = "Error")]
w: Option<String>,
/// Spit the output into the standard output instead. This ignores any given
/// `out` flag. Disabled by default.
#[arg(long, default_value_t = false)]
stdout: bool,
}
fn main() -> Result<()> {
let args = Args::parse();
// Select the input stream and the current working directory.
let input: Box<dyn Read>;
let working_directory = match &args.file {
Some(file) => {
let path = Path::new(file);
if !path.is_file() {
bail!("Input file must be a valid file");
}
input = Box::new(File::open(file)?);
path.parent()
.with_context(|| String::from("Failed to find directory for given file"))?
}
None => {
input = Box::new(std::io::stdin());
&std::env::current_dir()
.with_context(|| String::from("Could not fetch current directory"))?
}
};
// Select the output stream.
let mut output: Box<dyn Write> = if args.stdout {
Box::new(io::stdout())
} else {
Box::new(File::create(args.out.unwrap_or(String::from("out.nes")))?)
};
// Check if warnings have to be treated as errors.
let warn_as_errors = match args.w {
Some(value) => {
if value.to_lowercase() != "error" {
bail!("The '-W' flag can only be used as '-Werror'");
} else {
true
}
}
None => false,
};
// Select the linker configuration.
let mapping: Vec<Mapping> = match args.config {
Some(c) => match c.to_lowercase().as_str() {
"empty" => EMPTY.to_vec(),
"nrom" => NROM.to_vec(),
"nrom65" => NROM65.to_vec(),
_ => {
println!("Unnown linker configuration '{}'", c);
std::process::exit(1);
}
},
None => NROM.to_vec(),
};
// And assemble.
let mut error_count = 0;
let mut assembler = Assembler::new(mapping);
match assembler.assemble(working_directory.to_path_buf(), input) {
Ok(bundles) => {
for warning in assembler.warnings() {
if warn_as_errors {
println!("{}", warning);
error_count += 1;
} else {
println!("Warning: {}", warning);
}
}
if error_count == 0 {
for b in bundles {
for i in 0..b.size {
output.write_all(&[b.bytes[i as usize]])?;
}
}
}
}
Err(errors) => {
for err in errors {
println!("{}", err);
error_count += 1;
}
}
}
std::process::exit(error_count);
}
|
