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Made unsafely safe functions unsafe again, for safety

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This commit is contained in:
Marvin Löbel 2013-04-20 10:58:54 +02:00
parent 276293af7c
commit 4357cbf2fa
1 changed files with 4 additions and 4 deletions
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8
src/libcore/str.rs
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@ -2319,20 +2319,20 @@ pub mod raw {
} }
/// Removes the last byte from a string and returns it. (Not UTF-8 safe). /// Removes the last byte from a string and returns it. (Not UTF-8 safe).
pub fn pop_byte(s: &mut ~str) -> u8 { pub unsafe fn pop_byte(s: &mut ~str) -> u8 {
let len = len(*s); let len = len(*s);
assert!((len > 0u)); assert!((len > 0u));
let b = s[len - 1u]; let b = s[len - 1u];
unsafe { set_len(s, len - 1u) }; set_len(s, len - 1u);
return b; return b;
} }
/// Removes the first byte from a string and returns it. (Not UTF-8 safe). /// Removes the first byte from a string and returns it. (Not UTF-8 safe).
pub fn shift_byte(s: &mut ~str) -> u8 { pub unsafe fn shift_byte(s: &mut ~str) -> u8 {
let len = len(*s); let len = len(*s);
assert!((len > 0u)); assert!((len > 0u));
let b = s[0]; let b = s[0];
*s = unsafe { raw::slice_bytes_owned(*s, 1u, len) }; *s = raw::slice_bytes_owned(*s, 1u, len);
return b; return b;
} }