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Fix byte_len in char_len_range to be what it is advertised.

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Kevin Atkinson 2012-01-24 22:57:51 -07:00 • committed by Graydon Hoare
parent 33f4a98388
commit e127bf680f
1 changed files with 3 additions and 3 deletions
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4
src/libcore/str.rs
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@ -1067,14 +1067,14 @@ FIXME: rename to 'substr_len_chars'
*/
fn char_len_range(s: str, byte_start: uint, byte_len: uint) -> uint {
let i = byte_start;
let byte_stop = i + byte_len;
let len = 0u;
while i < byte_len {
while i < byte_stop {
let chsize = utf8_char_width(s[i]);
assert (chsize > 0u);
len += 1u;
i += chsize;
}
assert (i == byte_len);
ret len;
}