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LibJS: Check if input was exhausted after parsing UTC offset fraction

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Previously parse_time_zone_numeric_utc_offset_syntax() would return true
to indicate success when parsing a string with an invalid number of
digits in the fractional seconds part (e.g. 23:59:59.9999999999).
We need to check if the lexer has any characters remaining, and return
false if that's the case.
This commit is contained in:
Linus Groh 2022-01-11 20:11:59 +01:00
parent de07312cc7
commit f1276144ba
2 changed files with 13 additions and 1 deletions
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4
Userland/Libraries/LibJS/Runtime/Temporal/TimeZone.cpp
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@ -230,7 +230,9 @@ static bool parse_time_zone_numeric_utc_offset_syntax(String const& offset_strin
if (!lexer.consume_specific('.') && !lexer.consume_specific(','))
return false;
fraction = lexer.consume_fractional_seconds();
return fraction.has_value();
if (!fraction.has_value())
return false;
return !lexer.tell_remaining();
}
bool is_valid_time_zone_numeric_utc_offset_syntax(String const& offset_string)