1 // Copyright 2017 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
13 use libc::{c_float, c_double};
17 pub fn acos(n: c_double) -> c_double;
18 pub fn asin(n: c_double) -> c_double;
19 pub fn atan(n: c_double) -> c_double;
20 pub fn atan2(a: c_double, b: c_double) -> c_double;
21 pub fn cbrt(n: c_double) -> c_double;
22 pub fn cbrtf(n: c_float) -> c_float;
23 pub fn cosh(n: c_double) -> c_double;
24 pub fn expm1(n: c_double) -> c_double;
25 pub fn expm1f(n: c_float) -> c_float;
26 pub fn fdim(a: c_double, b: c_double) -> c_double;
27 pub fn fdimf(a: c_float, b: c_float) -> c_float;
28 #[cfg_attr(target_env = "msvc", link_name = "_hypot")]
29 pub fn hypot(x: c_double, y: c_double) -> c_double;
30 #[cfg_attr(target_env = "msvc", link_name = "_hypotf")]
31 pub fn hypotf(x: c_float, y: c_float) -> c_float;
32 pub fn log1p(n: c_double) -> c_double;
33 pub fn log1pf(n: c_float) -> c_float;
34 pub fn sinh(n: c_double) -> c_double;
35 pub fn tan(n: c_double) -> c_double;
36 pub fn tanh(n: c_double) -> c_double;
39 pub use self::shims::*;
41 #[cfg(not(target_env = "msvc"))]
46 pub fn acosf(n: c_float) -> c_float;
47 pub fn asinf(n: c_float) -> c_float;
48 pub fn atan2f(a: c_float, b: c_float) -> c_float;
49 pub fn atanf(n: c_float) -> c_float;
50 pub fn coshf(n: c_float) -> c_float;
51 pub fn sinhf(n: c_float) -> c_float;
52 pub fn tanf(n: c_float) -> c_float;
53 pub fn tanhf(n: c_float) -> c_float;
57 // On MSVC these functions aren't defined, so we just define shims which promote
58 // everything fo f64, perform the calculation, and then demote back to f32.
59 // While not precisely correct should be "correct enough" for now.
60 #[cfg(target_env = "msvc")]
65 pub unsafe fn acosf(n: c_float) -> c_float {
66 f64::acos(n as f64) as c_float
70 pub unsafe fn asinf(n: c_float) -> c_float {
71 f64::asin(n as f64) as c_float
75 pub unsafe fn atan2f(n: c_float, b: c_float) -> c_float {
76 f64::atan2(n as f64, b as f64) as c_float
80 pub unsafe fn atanf(n: c_float) -> c_float {
81 f64::atan(n as f64) as c_float
85 pub unsafe fn coshf(n: c_float) -> c_float {
86 f64::cosh(n as f64) as c_float
90 pub unsafe fn sinhf(n: c_float) -> c_float {
91 f64::sinh(n as f64) as c_float
95 pub unsafe fn tanf(n: c_float) -> c_float {
96 f64::tan(n as f64) as c_float
100 pub unsafe fn tanhf(n: c_float) -> c_float {
101 f64::tanh(n as f64) as c_float