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-rw-r--r--src/tokens.rs11
1 files changed, 4 insertions, 7 deletions
diff --git a/src/tokens.rs b/src/tokens.rs
index bfdc74e..1b5a755 100644
--- a/src/tokens.rs
+++ b/src/tokens.rs
@@ -2,6 +2,7 @@ use std::borrow::Cow;
use std::char;
use std::str;
use std::string;
+use std::string::String as StdString;
use self::Token::*;
@@ -382,19 +383,15 @@ impl<'a> Tokenizer<'a> {
}
fn hex(&mut self, start: usize, i: usize, len: usize) -> Result<char, Error> {
- let mut val = 0;
+ let mut buf = StdString::with_capacity(len);
for _ in 0..len {
match self.one() {
- Some((_, ch)) if '0' <= ch && ch <= '9' => {
- val = val * 16 + (ch as u32 - '0' as u32);
- }
- Some((_, ch)) if 'A' <= ch && ch <= 'F' => {
- val = val * 16 + (ch as u32 - 'A' as u32) + 10;
- }
+ Some((_, ch)) if ch as u32 <= 0x7F && ch.is_digit(16) => buf.push(ch),
Some((i, ch)) => return Err(Error::InvalidHexEscape(i, ch)),
None => return Err(Error::UnterminatedString(start)),
}
}
+ let val = u32::from_str_radix(&buf, 16).unwrap();
match char::from_u32(val) {
Some(ch) => Ok(ch),
None => Err(Error::InvalidEscapeValue(i, val)),