90 lines
3.1 KiB
Rust
90 lines
3.1 KiB
Rust
#![allow(non_camel_case_types)]
|
|
|
|
pub type c_int = i32;
|
|
pub type c_uchar = u8;
|
|
pub type c_uint = u32;
|
|
pub type size_t = usize;
|
|
|
|
/// This might not match C's `c_char` exactly.
|
|
/// The way we use it makes it fine either way but this type shouldn't be used outside of the library.
|
|
pub type c_char = i8;
|
|
|
|
pub use core::ffi::c_void;
|
|
|
|
/// A type that is as aligned as the biggest alignment for fundamental types in C
|
|
/// since C11 that means as aligned as `max_align_t` is.
|
|
/// the exact size/alignment is unspecified.
|
|
// 16 matches is as big as the biggest alignment in any arch that rust currently supports https://github.com/rust-lang/rust/blob/2c31b45ae878b821975c4ebd94cc1e49f6073fd0/library/std/src/sys_common/alloc.rs
|
|
#[repr(align(16))]
|
|
#[derive(Default, Copy, Clone)]
|
|
pub struct AlignedType([u8; 16]);
|
|
|
|
impl AlignedType {
|
|
pub fn zeroed() -> Self {
|
|
AlignedType([0u8; 16])
|
|
}
|
|
|
|
/// A static zeroed out AlignedType for use in static assignments of [AlignedType; _]
|
|
pub const ZERO: AlignedType = AlignedType([0u8; 16]);
|
|
}
|
|
|
|
#[cfg(all(feature = "alloc", not(rust_secp_no_symbol_renaming)))]
|
|
pub(crate) const ALIGN_TO: usize = core::mem::align_of::<AlignedType>();
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
extern crate libc;
|
|
use std::any::TypeId;
|
|
use std::mem;
|
|
use std::os::raw;
|
|
use crate::{types, AlignedType};
|
|
|
|
#[test]
|
|
fn verify_types() {
|
|
assert_eq!(TypeId::of::<types::c_int>(), TypeId::of::<raw::c_int>());
|
|
assert_eq!(TypeId::of::<types::c_uchar>(), TypeId::of::<raw::c_uchar>());
|
|
assert_eq!(TypeId::of::<types::c_uint>(), TypeId::of::<raw::c_uint>());
|
|
assert_eq!(TypeId::of::<types::c_char>(), TypeId::of::<raw::c_char>());
|
|
|
|
assert!(mem::align_of::<AlignedType>() >= mem::align_of::<self::libc::max_align_t>());
|
|
}
|
|
}
|
|
|
|
#[doc(hidden)]
|
|
#[cfg(target_arch = "wasm32")]
|
|
pub fn sanity_checks_for_wasm() {
|
|
use core::mem::{align_of, size_of};
|
|
extern "C" {
|
|
pub static WASM32_INT_SIZE: c_uchar;
|
|
pub static WASM32_INT_ALIGN: c_uchar;
|
|
|
|
pub static WASM32_UNSIGNED_INT_SIZE: c_uchar;
|
|
pub static WASM32_UNSIGNED_INT_ALIGN: c_uchar;
|
|
|
|
pub static WASM32_SIZE_T_SIZE: c_uchar;
|
|
pub static WASM32_SIZE_T_ALIGN: c_uchar;
|
|
|
|
pub static WASM32_UNSIGNED_CHAR_SIZE: c_uchar;
|
|
pub static WASM32_UNSIGNED_CHAR_ALIGN: c_uchar;
|
|
|
|
pub static WASM32_PTR_SIZE: c_uchar;
|
|
pub static WASM32_PTR_ALIGN: c_uchar;
|
|
}
|
|
unsafe {
|
|
assert_eq!(size_of::<c_int>(), WASM32_INT_SIZE as usize);
|
|
assert_eq!(align_of::<c_int>(), WASM32_INT_ALIGN as usize);
|
|
|
|
assert_eq!(size_of::<c_uint>(), WASM32_UNSIGNED_INT_SIZE as usize);
|
|
assert_eq!(align_of::<c_uint>(), WASM32_UNSIGNED_INT_ALIGN as usize);
|
|
|
|
assert_eq!(size_of::<size_t>(), WASM32_SIZE_T_SIZE as usize);
|
|
assert_eq!(align_of::<size_t>(), WASM32_SIZE_T_ALIGN as usize);
|
|
|
|
assert_eq!(size_of::<c_uchar>(), WASM32_UNSIGNED_CHAR_SIZE as usize);
|
|
assert_eq!(align_of::<c_uchar>(), WASM32_UNSIGNED_CHAR_ALIGN as usize);
|
|
|
|
assert_eq!(size_of::<*const ()>(), WASM32_PTR_SIZE as usize);
|
|
assert_eq!(align_of::<*const ()>(), WASM32_PTR_ALIGN as usize);
|
|
}
|
|
}
|