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Fix empty intermediate directories being omitted from full directory index which can cause issues in some cases

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This commit is contained in:
Truman Kilen 2024-04-19 11:31:59 -05:00
parent dccdc13739
commit c9abc25336
1 changed files with 45 additions and 13 deletions
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58
repak/src/pak.rs
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@ -615,6 +615,19 @@ fn fnv64(data: &[u8], offset: u64) -> u64 {
hash
}
fn split_path_child(path: &str) -> Option<(&str, &str)> {
if path == "/" || path.is_empty() {
None
} else {
let path = path.strip_suffix('/').unwrap_or(path);
let i = path.rfind('/').map(|i| i + 1);
match i {
Some(i) => Some(path.split_at(i)),
None => Some(("/", path)),
}
}
}
fn generate_full_directory_index<W: Write>(
writer: &mut W,
entries: &BTreeMap<String, super::entry::Entry>,
@ -622,24 +635,21 @@ fn generate_full_directory_index<W: Write>(
) -> Result<(), super::Error> {
let mut fdi = BTreeMap::new();
for (path, offset) in entries.keys().zip(offsets) {
let (directory, filename) = {
let i = path.rfind('/').map(|i| i + 1); // we want to include the slash on the directory
match i {
Some(i) => {
let (l, r) = path.split_at(i);
(l.to_owned(), r.to_owned())
}
None => ("/".to_owned(), path.to_owned()),
}
};
let mut p = path.as_str();
while let Some((parent, _)) = split_path_child(p) {
p = parent;
fdi.entry(p).or_default();
}
let (directory, filename) = split_path_child(path).expect("none root path");
fdi.entry(directory)
.and_modify(|d: &mut BTreeMap<String, u32>| {
d.insert(filename.clone(), *offset);
.and_modify(|d: &mut BTreeMap<&str, u32>| {
d.insert(filename, *offset);
})
.or_insert_with(|| {
let mut files_and_offsets = BTreeMap::new();
files_and_offsets.insert(filename.clone(), *offset);
files_and_offsets.insert(filename, *offset);
files_and_offsets
});
}
@ -672,3 +682,25 @@ fn encrypt(key: aes::Aes256, bytes: &mut [u8]) {
key.encrypt_block(aes::Block::from_mut_slice(chunk))
}
}
#[cfg(test)]
mod test {
use super::*;
#[test]
fn test_split_path_child() {
assert_eq!(
split_path_child("a/really/long/path"),
Some(("a/really/long/", "path"))
);
assert_eq!(
split_path_child("a/really/long/"),
Some(("a/really/", "long"))
);
assert_eq!(split_path_child("a"), Some(("/", "a")));
assert_eq!(split_path_child("a//b"), Some(("a//", "b")));
assert_eq!(split_path_child("a//"), Some(("a/", "")));
assert_eq!(split_path_child("/"), None);
assert_eq!(split_path_child(""), None);
}
}