348930eb4e
This commit moves the `f32::cmath` and `f64::cmath` modules into the `sys` module. Note that these are not publicly exported modules, simply implementation details. These modules are already platform-specific with shims on MSVC and this is mostly just a reflection of that reality. This should also help cut down on `#[cfg]` traffic if platforms are brought on which don't directly support these functions.
103 lines
3.1 KiB
Rust
103 lines
3.1 KiB
Rust
// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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#![cfg(not(test))]
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use libc::{c_float, c_double};
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#[link_name = "m"]
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extern {
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pub fn acos(n: c_double) -> c_double;
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pub fn asin(n: c_double) -> c_double;
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pub fn atan(n: c_double) -> c_double;
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pub fn atan2(a: c_double, b: c_double) -> c_double;
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pub fn cbrt(n: c_double) -> c_double;
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pub fn cbrtf(n: c_float) -> c_float;
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pub fn cosh(n: c_double) -> c_double;
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pub fn expm1(n: c_double) -> c_double;
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pub fn expm1f(n: c_float) -> c_float;
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pub fn fdim(a: c_double, b: c_double) -> c_double;
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pub fn fdimf(a: c_float, b: c_float) -> c_float;
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#[cfg_attr(target_env = "msvc", link_name = "_hypot")]
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pub fn hypot(x: c_double, y: c_double) -> c_double;
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#[cfg_attr(target_env = "msvc", link_name = "_hypotf")]
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pub fn hypotf(x: c_float, y: c_float) -> c_float;
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pub fn log1p(n: c_double) -> c_double;
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pub fn log1pf(n: c_float) -> c_float;
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pub fn sinh(n: c_double) -> c_double;
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pub fn tan(n: c_double) -> c_double;
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pub fn tanh(n: c_double) -> c_double;
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}
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pub use self::shims::*;
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#[cfg(not(target_env = "msvc"))]
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mod shims {
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use libc::c_float;
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extern {
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pub fn acosf(n: c_float) -> c_float;
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pub fn asinf(n: c_float) -> c_float;
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pub fn atan2f(a: c_float, b: c_float) -> c_float;
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pub fn atanf(n: c_float) -> c_float;
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pub fn coshf(n: c_float) -> c_float;
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pub fn sinhf(n: c_float) -> c_float;
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pub fn tanf(n: c_float) -> c_float;
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pub fn tanhf(n: c_float) -> c_float;
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}
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}
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// On MSVC these functions aren't defined, so we just define shims which promote
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// everything fo f64, perform the calculation, and then demote back to f32.
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// While not precisely correct should be "correct enough" for now.
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#[cfg(target_env = "msvc")]
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mod shims {
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use libc::c_float;
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#[inline]
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pub unsafe fn acosf(n: c_float) -> c_float {
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f64::acos(n as f64) as c_float
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}
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#[inline]
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pub unsafe fn asinf(n: c_float) -> c_float {
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f64::asin(n as f64) as c_float
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}
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#[inline]
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pub unsafe fn atan2f(n: c_float, b: c_float) -> c_float {
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f64::atan2(n as f64, b as f64) as c_float
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}
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#[inline]
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pub unsafe fn atanf(n: c_float) -> c_float {
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f64::atan(n as f64) as c_float
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}
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#[inline]
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pub unsafe fn coshf(n: c_float) -> c_float {
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f64::cosh(n as f64) as c_float
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}
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#[inline]
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pub unsafe fn sinhf(n: c_float) -> c_float {
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f64::sinh(n as f64) as c_float
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}
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#[inline]
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pub unsafe fn tanf(n: c_float) -> c_float {
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f64::tan(n as f64) as c_float
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}
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#[inline]
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pub unsafe fn tanhf(n: c_float) -> c_float {
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f64::tanh(n as f64) as c_float
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}
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}
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