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fix reserve when bit offset is large

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Robin Appelman 2021-07-19 15:21:00 +02:00
commit 51d43bbcf6
1 changed files with 1 additions and 3 deletions
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src/writebuffer.rs
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@ -160,12 +160,10 @@ impl<'a, E: Endianness> ExpandWriteBuffer<'a, E> {
/// ///
/// One fixed size part and one expanding part /// One fixed size part and one expanding part
fn reserve(&mut self, length: usize) -> (FixedWriteBuffer<E>, ExpandWriteBuffer<E>) { fn reserve(&mut self, length: usize) -> (FixedWriteBuffer<E>, ExpandWriteBuffer<E>) {
let byte_count = (length + 7) / 8;
let bit_offset = self.bit_len & 7; let bit_offset = self.bit_len & 7;
let byte_index = self.bit_len / 8; let byte_index = self.bit_len / 8;
let end_byte = byte_index + byte_count; let end_byte = (self.bit_len + length + 7) / 8;
{ {
let bytes = unsafe { self.bytes.as_mut().unwrap() }; let bytes = unsafe { self.bytes.as_mut().unwrap() };