blob: dc1d0c9ff6a4ca259f3badb928ba798a3586a408 [file] [log] [blame]
#[cfg(target_os = "windows")]
use INVALID_UTF8;
use std::ffi::OsStr;
#[cfg(not(target_os = "windows"))]
use std::os::unix::ffi::OsStrExt;
#[cfg(target_os = "windows")]
pub trait OsStrExt3 {
fn from_bytes(b: &[u8]) -> &Self;
fn as_bytes(&self) -> &[u8];
}
#[doc(hidden)]
pub trait OsStrExt2 {
fn starts_with(&self, s: &[u8]) -> bool;
fn split_at_byte(&self, b: u8) -> (&OsStr, &OsStr);
fn split_at(&self, i: usize) -> (&OsStr, &OsStr);
fn trim_left_matches(&self, b: u8) -> &OsStr;
fn len_(&self) -> usize;
fn contains_byte(&self, b: u8) -> bool;
fn is_empty_(&self) -> bool;
fn split(&self, b: u8) -> OsSplit;
}
#[cfg(target_os = "windows")]
impl OsStrExt3 for OsStr {
fn from_bytes(b: &[u8]) -> &Self {
use std::mem;
unsafe { mem::transmute(b) }
}
fn as_bytes(&self) -> &[u8] { self.to_str().map(|s| s.as_bytes()).expect(INVALID_UTF8) }
}
impl OsStrExt2 for OsStr {
fn starts_with(&self, s: &[u8]) -> bool { self.as_bytes().starts_with(s) }
fn is_empty_(&self) -> bool { self.as_bytes().is_empty() }
fn contains_byte(&self, byte: u8) -> bool {
for b in self.as_bytes() {
if b == &byte {
return true;
}
}
false
}
fn split_at_byte(&self, byte: u8) -> (&OsStr, &OsStr) {
for (i, b) in self.as_bytes().iter().enumerate() {
if b == &byte {
return (
OsStr::from_bytes(&self.as_bytes()[..i]),
OsStr::from_bytes(&self.as_bytes()[i + 1..]),
);
}
}
(
&*self,
OsStr::from_bytes(&self.as_bytes()[self.len_()..self.len_()]),
)
}
fn trim_left_matches(&self, byte: u8) -> &OsStr {
let mut found = false;
for (i, b) in self.as_bytes().iter().enumerate() {
if b != &byte {
return OsStr::from_bytes(&self.as_bytes()[i..]);
} else {
found = true;
}
}
if found {
return OsStr::from_bytes(&self.as_bytes()[self.len_()..]);
}
&*self
}
fn split_at(&self, i: usize) -> (&OsStr, &OsStr) {
(
OsStr::from_bytes(&self.as_bytes()[..i]),
OsStr::from_bytes(&self.as_bytes()[i..]),
)
}
fn len_(&self) -> usize { self.as_bytes().len() }
fn split(&self, b: u8) -> OsSplit {
OsSplit {
sep: b,
val: self.as_bytes(),
pos: 0,
}
}
}
#[doc(hidden)]
#[derive(Clone, Debug)]
pub struct OsSplit<'a> {
sep: u8,
val: &'a [u8],
pos: usize,
}
impl<'a> Iterator for OsSplit<'a> {
type Item = &'a OsStr;
fn next(&mut self) -> Option<&'a OsStr> {
debugln!("OsSplit::next: self={:?}", self);
if self.pos == self.val.len() {
return None;
}
let start = self.pos;
for b in &self.val[start..] {
self.pos += 1;
if *b == self.sep {
return Some(OsStr::from_bytes(&self.val[start..self.pos - 1]));
}
}
Some(OsStr::from_bytes(&self.val[start..]))
}
fn size_hint(&self) -> (usize, Option<usize>) {
let mut count = 0;
for b in &self.val[self.pos..] {
if *b == self.sep {
count += 1;
}
}
if count > 0 {
return (count, Some(count));
}
(0, None)
}
}
impl<'a> DoubleEndedIterator for OsSplit<'a> {
fn next_back(&mut self) -> Option<&'a OsStr> {
if self.pos == 0 {
return None;
}
let start = self.pos;
for b in self.val[..self.pos].iter().rev() {
self.pos -= 1;
if *b == self.sep {
return Some(OsStr::from_bytes(&self.val[self.pos + 1..start]));
}
}
Some(OsStr::from_bytes(&self.val[..start]))
}
}