Following the s390x ELF ABI and based on the clang implementation,
provide appropriate definitions of va_list in library/core/src/ffi/mod.rs
and va_arg handling in compiler/rustc_codegen_llvm/src/va_arg.rs.
Fixes the following test cases on s390x:
src/test/run-make-fulldeps/c-link-to-rust-va-list-fn
src/test/ui/abi/variadic-ffi.rs
Fixes https://github.com/rust-lang/rust/issues/84628.
Fix naming format of IEEE 754 standard
Currently the documentation of f64::min refers to "IEEE-754 2008" while the documentation of f64::minimum refers to "IEEE 754-2019".
Note that one has the format IEEE,hyphen,number,space,year while the other is IEEE,space,number,hyphen,year. The official IEEE site [1] uses the later format and it is also the one most commonly used throughout the codebase.
Update all comments and - more importantly - documentation to consistently use the official format.
[1] https://standards.ieee.org/ieee/754/4211/
Currently the documentation of f64::min refers to "IEEE-754 2008" while the documentation of
f64::minimum refers to "IEEE 754-2019".
Note that one has the format IEEE,hyphen,number,space,year while the other is
IEEE,space,number,hyphen,year. The official IEEE site [1] uses the later format and it is also the
one most commonly used throughout the codebase.
Update all comments and - more importantly - documentation to consistently use the official format.
[1] https://standards.ieee.org/ieee/754/4211/
Stabilize the `core_c_str` and `alloc_c_string` feature gates.
Change `std::ffi` to re-export these types rather than creating type
aliases, since they now have matching stability.
Stabilize `core::ffi:c_*` and rexport in `std::ffi`
This only stabilizes the base types, not the non-zero variants, since
those have their own separate tracking issue and have not gone through
FCP to stabilize.
This only stabilizes the base types, not the non-zero variants, since
those have their own separate tracking issue and have not gone through
FCP to stabilize.
Improve the safety docs for `CStr`
Namely, the two functions `from_ptr` and `from_bytes_with_nul_unchecked`.
Before, these functions didn't state the requirements clearly enough,
and I was not immediately able to find them like for other functions.
This doesn't change the content of the docs, but simply rewords them for
clarity.
note: I'm not entirely sure about the '`ptr` must be valid for reads of `u8`.', there might be room for improvement for this (and maybe for the other docs as well 😄)
Namely, the two functions `from_ptr` and `from_bytes_with_nul_unchecked`.
Before, this functions didn't state the requirements clearly enough,
and I was not immediately able to find them like for other functions.
This doesn't change the content of the docs, but simply rewords them for
clarity.
It looks like the last time had left some remaining cfg's -- which made me think
that the stage0 bump was actually successful. This brings us to a released 1.62
beta though.
Fixes: aa67016624 ("make memcmp return a value of c_int_width instead of i32")
Introduce c_num_definition to getting the cfg_if logic easier to maintain
Add newlines for easier code reading
Signed-off-by: Yonggang Luo <luoyonggang@gmail.com>
When CStr moves to core with an alias in std, this can link to
`crate::ffi::CStr`. However, linking in the reverse direction (from core
to std) requires a relative path, and that path can't work from both
core::ffi and std::os::raw (different number of `../` traversals
required).
The ability to interoperate with C code via FFI is not limited to crates
using std; this allows using these types without std.
The existing types in `std::os::raw` become type aliases for the ones in
`core::ffi`. This uses type aliases rather than re-exports, to allow the
std types to remain stable while the core types are unstable.
This also moves the currently unstable `NonZero_` variants and
`c_size_t`/`c_ssize_t`/`c_ptrdiff_t` types to `core::ffi`, while leaving
them unstable.
