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// Copyright © 2017 Mozilla Foundation
//
// This program is made available under an ISC-style license. See the
// accompanying file LICENSE for details.
use std::ffi::CStr;
use std::os::raw::c_char;
use std::ptr;
pub trait UnwrapCStr {
fn unwrap_cstr(self) -> *const c_char;
}
impl<'a, U> UnwrapCStr for U
where
U: Into<Option<&'a CStr>>,
{
fn unwrap_cstr(self) -> *const c_char {
self.into().map(|o| o.as_ptr()).unwrap_or(0 as *const _)
}
}
pub fn map_to_mut_ptr<T, U, F: FnOnce(&T) -> *mut U>(t: Option<&mut T>, f: F) -> *mut U {
match t {
Some(x) => f(x),
None => ptr::null_mut(),
}
}
pub fn str_to_ptr(s: Option<&CStr>) -> *const c_char {
match s {
Some(x) => x.as_ptr(),
None => ptr::null(),
}
}
pub fn to_ptr<T>(t: Option<&T>) -> *const T {
match t {
Some(x) => x as *const T,
None => ptr::null(),
}
}
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