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add tests for RocStr clone

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This commit is contained in:
Folkert 2021-01-03 03:12:49 +01:00
parent 0abc1cce15
commit 6749606450
2 changed files with 24 additions and 4 deletions
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16
roc_std/src/lib.rs
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@ -443,18 +443,26 @@ impl Eq for RocStr {}
impl Clone for RocStr {
fn clone(&self) -> Self {
if self.is_small_str() {
if self.is_small_str() || self.is_empty() {
Self {
elements: self.elements,
length: self.length,
}
} else {
let capacity_size = core::mem::size_of::<usize>();
let copy_length = self.length + capacity_size;
let elements = unsafe {
let raw = libc::malloc(self.length);
let raw = libc::malloc(copy_length);
libc::memcpy(raw, self.elements as *mut libc::c_void, self.length);
libc::memcpy(
raw,
self.elements.offset(-(capacity_size as isize)) as *mut libc::c_void,
copy_length,
);
raw as *mut u8
*(raw as *mut usize) = self.length;
(raw as *mut u8).add(capacity_size)
};
Self {