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fix(utils): improve safety of media loader and utf-16 handling

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This commit is contained in:
Alex Zenla
2025-11-01 18:49:10 -04:00
parent 992520c201
commit a998832f6b
2 changed files with 11 additions and 16 deletions
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15
src/utils.rs
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@@ -280,11 +280,14 @@ pub fn utf16_bytes_to_cstring16(bytes: &[u8]) -> Result<CString16> {
bail!("utf16 bytes must be a multiple of 2");
}
// SAFETY: reinterpret &[u8] as &[u16].
// We just validated it has the right length.
let ptr = bytes.as_ptr() as *const u16;
let len = bytes.len() / 2;
let utf16 = unsafe { std::slice::from_raw_parts(ptr, len) };
// Convert the bytes to UTF-16 data.
let data = bytes
// Chunk everything into two bytes.
.chunks_exact(2)
// Reinterpret the bytes as u16 little-endian.
.map(|chunk| u16::from_le_bytes([chunk[0], chunk[1]]))
// Collect the result into a vector.
.collect::<Vec<_>>();
CString16::try_from(utf16.to_vec()).context("unable to convert utf16 bytes to CString16")
CString16::try_from(data).context("unable to convert utf16 bytes to CString16")
}