59 lines
1.8 KiB
Rust
59 lines
1.8 KiB
Rust
#![feature(iter_next_chunk)]
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fn main() -> Result<(), Box<dyn std::error::Error>> {
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println!("cargo:rerun-if-changed=build.rs");
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println!("cargo:rerun-if-changed=instructions.in");
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let mut generated = String::new();
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gen_op_structs(&mut generated)?;
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std::fs::write("src/ops.rs", generated)?;
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let mut generated = String::new();
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gen_op_codes(&mut generated)?;
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std::fs::write("src/opcode.rs", generated)?;
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Ok(())
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}
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fn gen_op_structs(generated: &mut String) -> std::fmt::Result {
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use std::fmt::Write;
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let mut seen = std::collections::HashSet::new();
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writeln!(generated, "use crate::*;")?;
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for [.., args, _] in instructions() {
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if !seen.insert(args) {
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continue;
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}
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writeln!(generated, "#[derive(Clone, Copy, Debug)]")?;
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writeln!(generated, "#[repr(packed)]")?;
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write!(generated, "pub struct Ops{args}(")?;
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let mut first = true;
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for ch in args.chars().filter(|&ch| ch != 'N') {
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if !std::mem::take(&mut first) {
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write!(generated, ",")?;
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}
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write!(generated, "pub Op{ch}")?;
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}
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writeln!(generated, ");")?;
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writeln!(generated, "unsafe impl BytecodeItem for Ops{args} {{}}")?;
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}
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Ok(())
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}
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fn gen_op_codes(generated: &mut String) -> std::fmt::Result {
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use std::fmt::Write;
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for [op, name, _, comment] in instructions() {
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writeln!(generated, "#[doc = {comment}]")?;
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writeln!(generated, "pub const {name}: u8 = {op};")?;
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}
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Ok(())
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}
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fn instructions() -> impl Iterator<Item = [&'static str; 4]> {
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include_str!("../hbbytecode/instructions.in")
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.lines()
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.map(|line| line.strip_suffix(';').unwrap())
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.map(|line| line.splitn(4, ',').map(str::trim).next_chunk().unwrap())
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}
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