blob: a0c80587b0a96f847e9baaa1f4c2b7a360eaf88c [file] [log] [blame]
//! Platform dependent types.
cfg_if! {
if #[cfg(feature = "std")] {
pub use std::os::raw::c_void;
use std::borrow::Cow;
use std::fmt;
use std::path::PathBuf;
use std::prelude::v1::*;
} else if #[cfg(rustc_1_30)] {
pub use core::ffi::c_void;
} else {
compile_error!("`backtrace` requires Rust >=1.30.0 to support `no_std`.");
}
}
/// A platform independent representation of a string. When working with `std`
/// enabled it is recommended to the convenience methods for providing
/// conversions to `std` types.
#[derive(Debug)]
pub enum BytesOrWideString<'a> {
/// A slice, typically provided on Unix platforms.
Bytes(&'a [u8]),
/// Wide strings typically from Windows.
Wide(&'a [u16]),
}
#[cfg(feature = "std")]
impl<'a> BytesOrWideString<'a> {
/// Lossy converts to a `Cow<str>`, will allocate if `Bytes` is not valid
/// UTF-8 or if `BytesOrWideString` is `Wide`.
pub fn to_str_lossy(&self) -> Cow<'a, str> {
use self::BytesOrWideString::*;
match self {
&Bytes(slice) => String::from_utf8_lossy(slice),
&Wide(wide) => Cow::Owned(String::from_utf16_lossy(wide)),
}
}
/// Provides a `Path` representation of `BytesOrWideString`.
pub fn into_path_buf(self) -> PathBuf {
#[cfg(unix)]
{
use self::BytesOrWideString::*;
use std::ffi::OsStr;
use std::os::unix::ffi::OsStrExt;
match self {
Bytes(slice) => PathBuf::from(OsStr::from_bytes(slice)),
_ => unreachable!(),
}
}
#[cfg(windows)]
{
use self::BytesOrWideString::*;
use std::ffi::OsString;
use std::os::windows::ffi::OsStringExt;
match self {
Wide(slice) => PathBuf::from(OsString::from_wide(slice)),
_ => unreachable!(),
}
}
#[cfg(all(not(windows), not(unix)))]
{
unreachable!()
}
}
}
#[cfg(feature = "std")]
impl<'a> fmt::Display for BytesOrWideString<'a> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
self.to_str_lossy().fmt(f)
}
}