| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you under the Apache License, Version 2.0 (the |
| // "License"); you may not use this file except in compliance |
| // with the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, |
| // software distributed under the License is distributed on an |
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License.. |
| |
| //! Platform-specific types, as defined by C. |
| //! |
| //! Code that interacts via FFI will almost certainly be using the |
| //! base types provided by C, which aren't nearly as nicely defined |
| //! as Rust's primitive types. This module provides types which will |
| //! match those defined by C, so that code that interacts with C will |
| //! refer to the correct types. |
| |
| use core::num::*; |
| |
| macro_rules! type_alias_no_nz { |
| { |
| $Alias:ident = $Real:ty; |
| $( $Cfg:tt )* |
| } => { |
| $( $Cfg )* |
| pub type $Alias = $Real; |
| } |
| } |
| |
| macro_rules! type_alias { |
| { |
| $Alias:ident = $Real:ty, $NZAlias:ident = $NZReal:ty; |
| $( $Cfg:tt )* |
| } => { |
| type_alias_no_nz! { $Alias = $Real; $( $Cfg )* } |
| |
| $( $Cfg )* |
| pub type $NZAlias = $NZReal; |
| } |
| } |
| |
| type_alias! { c_char = i8, NonZero_c_char = NonZeroI8; } |
| type_alias! { c_schar = i8, NonZero_c_schar = NonZeroI8; } |
| type_alias! { c_uchar = u8, NonZero_c_uchar = NonZeroU8; } |
| type_alias! { c_short = i16, NonZero_c_short = NonZeroI16; } |
| type_alias! { c_ushort = u16, NonZero_c_ushort = NonZeroU16; } |
| type_alias! { c_int = i32, NonZero_c_int = NonZeroI32; } |
| type_alias! { c_uint = u32, NonZero_c_uint = NonZeroU32; } |
| type_alias! { c_long = i32, NonZero_c_long = NonZeroI32; |
| #[cfg(target_pointer_width = "32")] } |
| type_alias! { c_ulong = u32, NonZero_c_ulong = NonZeroU32; |
| #[cfg(target_pointer_width = "32")] } |
| type_alias! { c_long = i64, NonZero_c_long = NonZeroI64; |
| #[cfg(target_pointer_width = "64")] } |
| type_alias! { c_ulong = u64, NonZero_c_ulong = NonZeroU64; |
| #[cfg(target_pointer_width = "64")] } |
| type_alias! { c_longlong = i64, NonZero_c_longlong = NonZeroI64; } |
| type_alias! { c_ulonglong = u64, NonZero_c_ulonglong = NonZeroU64; } |
| type_alias_no_nz! { c_float = f32; } |
| type_alias_no_nz! { c_double = f64; } |
| |
| #[doc(no_inline)] |
| pub use core::ffi::c_void; |
| |
| /// Equivalent to C's `size_t` type, from `stddef.h` (or `cstddef` for C++). |
| /// |
| /// This type is currently always [`usize`], however in the future there may be |
| /// platforms where this is not the case. |
| pub type c_size_t = usize; |
| |
| /// Equivalent to C's `ptrdiff_t` type, from `stddef.h` (or `cstddef` for C++). |
| /// |
| /// This type is currently always [`isize`], however in the future there may be |
| /// platforms where this is not the case. |
| pub type c_ptrdiff_t = isize; |
| |
| /// Equivalent to C's `ssize_t` (on POSIX) or `SSIZE_T` (on Windows) type. |
| /// |
| /// This type is currently always [`isize`], however in the future there may be |
| /// platforms where this is not the case. |
| pub type c_ssize_t = isize; |