Jika/redox-kernel
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Correctly handle relative paths starting from the root directory

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This commit is contained in:
Kelvin Ly
2017-01-07 08:00:16 -05:00
parent 046d8ac0c5
commit b0cafc1890
1 changed files with 17 additions and 14 deletions
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31
src/context/context.rs
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@@ -133,25 +133,27 @@ impl Context {
.iter().rposition(|&b| b == b'/' || b == b':')
.map_or(cwd.len(), |i| i + 1)]
.to_vec()
} else if path.starts_with(b"/") {
let mut canon = cwd[..cwd.iter().position(|&b| b == b':').map_or(1, |i| i + 1)].to_vec();
canon.extend_from_slice(&path);
canon
} else {
let mut canon = cwd.clone();
if ! canon.ends_with(b"/") {
canon.push(b'/');
}
let mut canon = if !path.starts_with(b"/") {
let mut c = cwd.clone();
if ! c.ends_with(b"/") {
c.push(b'/');
}
c
} else {
cwd[..cwd.iter().position(|&b| b == b':').map_or(1, |i| i + 1)].to_vec()
};
canon.extend_from_slice(&path);
// NOTE: assumes the scheme does not include anything like "../" or "./"
let mut result = {
let rparts = canon.split(|&c| c == b'/')
let parts = canon.split(|&c| c == b'/')
.filter(|&part| part != b".")
.rev()
.scan(0, |nskip, part| {
if part == b".." {
*nskip += 1;
Some(None)
Some(None)
} else {
if *nskip > 0 {
*nskip -= 1;
@@ -163,7 +165,7 @@ impl Context {
})
.filter_map(|x| x)
.collect::<Vec<_>>();
rparts
parts
.iter()
.rev()
.fold(Vec::new(), |mut vec, &part| {
@@ -173,11 +175,12 @@ impl Context {
})
};
result.pop(); // remove extra '/'
// replace with the root of the schema if it's empty
if result.len() == 0 {
// replace with the root of the schema if it's empty
let pos = canon.iter()
.position(|&b| b == b':')
.map_or(canon.len(), |p| p + 1);
.position(|&b| b == b':')
.map_or(canon.len(), |p| p + 1);
canon.truncate(pos);
canon
} else {