139 lines
3.5 KiB
Rust
139 lines
3.5 KiB
Rust
// Passing structs via FFI should work regardless of whether
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// they get passed in multiple registers, byval pointers or the stack
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#[derive(Clone, Copy, Debug, PartialEq)]
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#[repr(C)]
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struct Rect {
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a: i32,
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b: i32,
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c: i32,
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d: i32,
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}
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#[derive(Clone, Copy, Debug, PartialEq)]
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#[repr(C)]
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struct BiggerRect {
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s: Rect,
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a: i32,
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b: i32,
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}
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#[derive(Clone, Copy, Debug, PartialEq)]
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#[repr(C)]
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struct FloatRect {
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a: i32,
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b: i32,
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c: f64,
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}
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#[derive(Clone, Copy, Debug, PartialEq)]
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#[repr(C)]
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struct Huge {
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a: i32,
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b: i32,
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c: i32,
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d: i32,
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e: i32,
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}
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#[derive(Clone, Copy, Debug, PartialEq)]
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#[repr(C)]
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struct FloatPoint {
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x: f64,
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y: f64,
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}
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#[derive(Clone, Copy, Debug, PartialEq)]
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#[repr(C)]
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struct FloatOne {
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x: f64,
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}
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#[derive(Clone, Copy, Debug, PartialEq)]
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#[repr(C)]
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struct IntOdd {
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a: i8,
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b: i8,
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c: i8,
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}
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#[link(name = "test", kind = "static")]
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extern "C" {
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fn byval_rect(a: i32, b: i32, c: i32, d: i32, e: i32, s: Rect);
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fn byval_many_rect(a: i32, b: i32, c: i32, d: i32, e: i32, f: i32, s: Rect);
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fn byval_rect_floats(
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a: f32,
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b: f32,
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c: f64,
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d: f32,
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e: f32,
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f: f32,
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g: f64,
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s: Rect,
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t: FloatRect,
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);
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fn byval_rect_with_float(a: i32, b: i32, c: f32, d: i32, e: i32, f: i32, s: Rect);
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fn byval_rect_with_many_huge(a: Huge, b: Huge, c: Huge, d: Huge, e: Huge, f: Huge, g: Rect);
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fn split_rect(a: i32, b: i32, s: Rect);
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fn split_rect_floats(a: f32, b: f32, s: FloatRect);
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fn split_rect_with_floats(a: i32, b: i32, c: f32, d: i32, e: f32, f: i32, s: Rect);
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fn split_and_byval_rect(a: i32, b: i32, c: i32, s: Rect, t: Rect);
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fn split_ret_byval_struct(a: i32, b: i32, s: Rect) -> Rect;
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fn sret_byval_struct(a: i32, b: i32, c: i32, d: i32, s: Rect) -> BiggerRect;
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fn sret_split_struct(a: i32, b: i32, s: Rect) -> BiggerRect;
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fn huge_struct(s: Huge) -> Huge;
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fn float_point(p: FloatPoint) -> FloatPoint;
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fn float_one(f: FloatOne) -> FloatOne;
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fn int_odd(i: IntOdd) -> IntOdd;
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}
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fn main() {
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let s = Rect { a: 553, b: 554, c: 555, d: 556 };
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let t = BiggerRect { s: s, a: 27834, b: 7657 };
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let u = FloatRect { a: 3489, b: 3490, c: 8. };
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let v = Huge { a: 5647, b: 5648, c: 5649, d: 5650, e: 5651 };
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let p = FloatPoint { x: 5., y: -3. };
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let f1 = FloatOne { x: 7. };
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let i = IntOdd { a: 1, b: 2, c: 3 };
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unsafe {
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byval_rect(1, 2, 3, 4, 5, s);
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byval_many_rect(1, 2, 3, 4, 5, 6, s);
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byval_rect_floats(1., 2., 3., 4., 5., 6., 7., s, u);
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byval_rect_with_float(1, 2, 3.0, 4, 5, 6, s);
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byval_rect_with_many_huge(v, v, v, v, v, v, Rect { a: 123, b: 456, c: 789, d: 420 });
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split_rect(1, 2, s);
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split_rect_floats(1., 2., u);
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split_rect_with_floats(1, 2, 3.0, 4, 5.0, 6, s);
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split_and_byval_rect(1, 2, 3, s, s);
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split_rect(1, 2, s);
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assert_eq!(huge_struct(v), v);
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assert_eq!(split_ret_byval_struct(1, 2, s), s);
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assert_eq!(sret_byval_struct(1, 2, 3, 4, s), t);
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assert_eq!(sret_split_struct(1, 2, s), t);
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assert_eq!(float_point(p), p);
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assert_eq!(int_odd(i), i);
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// MSVC/GCC/Clang are not consistent in the ABI of single-float aggregates.
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// x86_64: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82028
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// i686: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82041
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#[cfg(not(all(windows, target_env = "gnu")))]
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assert_eq!(float_one(f1), f1);
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}
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}
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