      1
      2
      3
      4
      5
      6
      7
      8
      9
     10
     11
     12
     13
     14
     15
     16
     17
     18
     19
     20
     21
     22
     23
     24
     25
     26
     27
     28
     29
     30
     31
     32
     33
     34
     35
     36
     37
     38
     39
     40
     41
     42
     43
     44
     45
     46
     47
     48
     49
     50
     51
     52
     53
     54
     55
     56
     57
     58
     59
     60
     61
     62
     63
     64
     65
     66
     67
     68
     69
     70
     71
     72
     73
     74
     75
     76
     77
     78
     79
     80
     81
     82
     83
     84
     85
     86
     87
     88
     89
     90
     91
     92
     93
     94
     95
     96
     97
     98
     99
    100
    101
    102
    103
    104
    105
    106
    107
    108
    109
    110
    111
    112
    113
    114
    115
    116
    117
    118
    119
    120
    121
    122
    123
    124
    125
    126
    127
    128

    use std::ffi::OsStr;
    #[cfg(not(target_os = "windows"))]
    use std::os::unix::ffi::OsStrExt;

    #[cfg(target_os = "windows")]
    use INVALID_UTF8;

    #[cfg(target_os = "windows")]
    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 {
            for (i, b) in self.as_bytes().iter().enumerate() {
                if b != &byte { return &OsStr::from_bytes(&self.as_bytes()[i..]); }
            }
            &*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!("fn=OsSplit::next;");
            debugln!("OsSplit: {:?}", 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]))
        }
    }

# Help

## Keyboard Shortcuts

?
  Show this help dialog
S
  Focus the search field
⇤
  Move up in search results
⇥
  Move down in search results
⏎
  Go to active search result

## Search Tricks

Prefix searches with a type followed by a colon (e.g. `fn:`) to restrict the search to a given type.

Accepted types are: `fn`, `mod`, `struct`, `enum`, `trait`, `type`, `macro`, and `const`.

Search functions by type signature (e.g. `vec -> usize` or `* -> vec`)