use formatic::{Arch, BinFormat, Decl, Endian, Link, ObjectBuilder, Scope};

pub fn main() -> Result<(), Box<dyn std::error::Error>> {
    let mut obj = ObjectBuilder::new("test.o");

    obj.decls(vec![
        ("callme", Decl::Function(Scope::Import)),
        ("call", Decl::Function(Scope::Export)),
        ("data", Decl::Data(Scope::Export)),
    ]);

    obj.define(
        "call",
        vec![
            0xF3, 0x0F, 0x1E, 0xFA,         // endbr64
            0x55,                           // push rbp
            0x48, 0x89, 0xE5,               // mov rbp, rsp
            0xE8, 0x00, 0x00, 0x00, 0x00,   // call callme
            0x5D,                           // pop rbp
            0xC3,                           // ret
        ],
    );

    obj.define("data", 
        b"Hello World".into()
    );

    obj.link(Link {
        from: "call".into(),
        to: "callme".into(),
        at: 9,
    });

    obj.write(BinFormat::host(), Arch::host(), Endian::host())?;

    Ok(())
}