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use std::slice;
use std::ffi::{CString,OsStr};
use ::libc::{c_int,c_char};
use std::os::unix::prelude::*;
pub fn ptr_to_os_str<'a>(ptr: *const c_char) -> Option<&'a OsStr> {
if !ptr.is_null() {
Some(unsafe { ptr_to_os_str_unchecked(ptr) })
}
else {
None
}
}
pub unsafe fn ptr_to_os_str_unchecked<'a>(ptr: *const c_char) -> &'a OsStr {
OsStr::from_bytes(slice::from_raw_parts(ptr as *const u8, ::libc::strlen(ptr) as usize))
}
pub fn os_str_to_cstring<T: AsRef<OsStr>>(s: T) -> ::Result<CString> {
match CString::new(s.as_ref().as_bytes()) {
Ok(s) => Ok(s),
Err(_) => return Err(::error::from_errno(::libc::EINVAL))
}
}
pub fn errno_to_result(errno: c_int) -> ::Result<()> {
match errno {
0 => Ok(()),
e => Err(::error::from_errno(e))
}
}