82 lines
2.2 KiB
Rust
82 lines
2.2 KiB
Rust
use repc::layout::{Type, TypeVariant};
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use std::fs::{File, OpenOptions};
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use std::io::BufWriter;
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use std::io::Write;
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use std::path::PathBuf;
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use std::{env, io};
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#[allow(unused_macros)]
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#[macro_use]
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#[path = "src/macros.rs"]
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mod macros;
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#[path = "src/pixman/consts.rs"]
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mod pixman;
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#[path = "src/xkbcommon/consts.rs"]
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mod xkbcommon;
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fn open(s: &str) -> io::Result<BufWriter<File>> {
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let mut path = PathBuf::from(env::var("OUT_DIR").unwrap());
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path.push(s);
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Ok(BufWriter::new(
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OpenOptions::new()
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.create(true)
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.write(true)
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.truncate(true)
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.open(path)?,
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))
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}
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fn get_target() -> repc::Target {
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let rustc_target = env::var("TARGET").unwrap();
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repc::TARGET_MAP
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.iter()
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.cloned()
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.find(|t| t.0 == &rustc_target)
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.unwrap()
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.1
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}
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fn get_enum_ty(variants: Vec<i128>) -> anyhow::Result<u64> {
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let target = get_target();
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let ty = Type {
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layout: (),
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annotations: vec![],
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variant: TypeVariant::Enum(variants),
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};
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let ty = repc::compute_layout(target, &ty)?;
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assert!(ty.layout.pointer_alignment_bits <= ty.layout.size_bits);
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Ok(ty.layout.size_bits)
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}
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fn write_ty<W: Write>(f: &mut W, vals: &[u32], ty: &str) -> anyhow::Result<()> {
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let variants: Vec<_> = vals.iter().cloned().map(|v| v as i128).collect();
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let size = get_enum_ty(variants)?;
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writeln!(f, "pub type {} = u{};", ty, size)?;
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Ok(())
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}
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fn main() -> anyhow::Result<()> {
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let mut f = open("pixman_tys.rs")?;
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write_ty(&mut f, pixman::FORMATS, "PixmanFormat")?;
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write_ty(&mut f, pixman::OPS, "PixmanOp")?;
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let mut f = open("xkbcommon_tys.rs")?;
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write_ty(
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&mut f,
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xkbcommon::XKB_X11_SETUP_XKB_EXTENSION_FLAGS,
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"xkb_x11_setup_xkb_extension_flags",
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)?;
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write_ty(&mut f, xkbcommon::XKB_LOG_LEVEL, "xkb_log_level")?;
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write_ty(&mut f, xkbcommon::XKB_CONTEXT_FLAGS, "xkb_context_flags")?;
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write_ty(
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&mut f,
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xkbcommon::XKB_KEYMAP_COMPILE_FLAGS,
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"xkb_keymap_compile_flags",
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)?;
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write_ty(&mut f, xkbcommon::XKB_KEYMAP_FORMAT, "xkb_keymap_format")?;
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println!("cargo:rerun-if-changed=build.rs");
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Ok(())
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}
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