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auto merge of #8289 : sfackler/rust/push_byte, r=erickt

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It was previously pushing the byte on top of the string's null
terminator. I added a test to make sure it doesn't break in the future.
This commit is contained in:
bors 2013-08-05 08:10:55 -07:00
commit d89ff7eef9
1 changed files with 8 additions and 1 deletions
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9
src/libstd/str.rs
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@ -902,7 +902,7 @@ pub mod raw {
let new_len = s.len() + 1; let new_len = s.len() + 1;
s.reserve_at_least(new_len); s.reserve_at_least(new_len);
do s.as_mut_buf |buf, len| { do s.as_mut_buf |buf, len| {
*ptr::mut_offset(buf, len as int) = b; *ptr::mut_offset(buf, (len-1) as int) = b;
} }
set_len(&mut *s, new_len); set_len(&mut *s, new_len);
} }
@ -2825,6 +2825,13 @@ mod tests {
assert!(!" _ ".is_whitespace()); assert!(!" _ ".is_whitespace());
} }
#[test]
fn test_push_byte() {
let mut s = ~"ABC";
unsafe{raw::push_byte(&mut s, 'D' as u8)};
assert_eq!(s, ~"ABCD");
}
#[test] #[test]
fn test_shift_byte() { fn test_shift_byte() {
let mut s = ~"ABC"; let mut s = ~"ABC";