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stylo: Backport rust-nsstring crash fixes to the vendored version.

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This commit is contained in:
Emilio Cobos Álvarez 2017-03-03 17:33:55 +01:00
parent 5662af9057
commit feac01f793
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1 changed files with 6 additions and 1 deletions
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7
components/style/gecko_bindings/nsstring_vendor/src/lib.rs
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@ -313,7 +313,7 @@ macro_rules! define_string_types {
assert!(s.len() < (u32::MAX as usize)); assert!(s.len() < (u32::MAX as usize));
$String { $String {
hdr: $StringRepr { hdr: $StringRepr {
data: s.as_ptr(), data: if s.is_empty() { ptr::null() } else { s.as_ptr()},
length: s.len() as u32, length: s.len() as u32,
flags: F_NONE, flags: F_NONE,
}, },
@ -325,6 +325,11 @@ macro_rules! define_string_types {
impl From<Box<[$char_t]>> for $String<'static> { impl From<Box<[$char_t]>> for $String<'static> {
fn from(s: Box<[$char_t]>) -> $String<'static> { fn from(s: Box<[$char_t]>) -> $String<'static> {
assert!(s.len() < (u32::MAX as usize)); assert!(s.len() < (u32::MAX as usize));
if s.is_empty() {
return $String::new();
}
// SAFETY NOTE: This method produces an F_OWNED ns[C]String from // SAFETY NOTE: This method produces an F_OWNED ns[C]String from
// a Box<[$char_t]>. this is only safe because in the Gecko // a Box<[$char_t]>. this is only safe because in the Gecko
// tree, we use the same allocator for Rust code as for C++ // tree, we use the same allocator for Rust code as for C++