5907a064a7
Even though `Int` and `isize` should be the same in practice, we can't cleanly convert, as the type information isn't quite there. And anyway, strictly speaking per the report, `Int` is only guaranteed to hold 30 bits. Note that this is essentially unchanged even if we specify `usize_is_size_t = true` for `cbindgen`.
41 lines
720 B
Rust
41 lines
720 B
Rust
#![allow(dead_code)]
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use std::ffi::{CStr, c_char};
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fn say_hello(name: &str) {
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println!("Hello from Rust, {name}!");
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}
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#[unsafe(no_mangle)]
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extern "C" fn hello(c: *const c_char) -> () {
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say_hello(unsafe { CStr::from_ptr(c) }.to_str().unwrap())
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}
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#[repr(C)]
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#[derive(Debug)]
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struct T {
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a: bool,
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b: u8,
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}
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#[unsafe(no_mangle)]
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extern "C" fn hello_struct(t: T) -> () {
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say_hello(&format!("{:?}", t))
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}
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#[repr(C, u8)]
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#[derive(Debug)]
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enum Shape {
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Circle { radius: f64 },
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Rectangle { width: f64, height: f64 },
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}
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#[unsafe(no_mangle)]
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extern "C" fn hello_shape(s: Shape) -> () {
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say_hello(&format!("{:?}", s))
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}
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#[unsafe(no_mangle)]
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extern "C" fn add(a: i64, b: i64) -> i64 {
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a + b
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}
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