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when rewriting the buffer, reserve enougth space

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debris 2015-11-26 18:36:28 +01:00
parent 7fca8b0ec5
commit 716c907dc2
1 changed files with 2 additions and 0 deletions
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2
src/rlp.rs
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@ -459,6 +459,8 @@ impl BasicEncoder {
fn insert_list_len_at_pos(&mut self, len: usize, pos: usize) -> () { fn insert_list_len_at_pos(&mut self, len: usize, pos: usize) -> () {
// new bytes // new bytes
let mut res: Vec<u8> = vec![]; let mut res: Vec<u8> = vec![];
// reserve a space equal at least current space + space for length
res.reserve(self.bytes.len() + 1);
{ {
let (before_slice, after_slice) = self.bytes.split_at(pos); let (before_slice, after_slice) = self.bytes.split_at(pos);
res.extend(before_slice); res.extend(before_slice);