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Make utf8_to_uvchr() slightly safer
authorKarl Williamson <khw@cpan.org>
Tue, 31 Jul 2018 03:41:44 +0000 (21:41 -0600)
committerKarl Williamson <khw@cpan.org>
Fri, 3 Aug 2018 19:13:24 +0000 (13:13 -0600)
commit2951abb4de83bfd534d332144e6a0bb3e2aaecdc
tree05ecab2a4c7a3d472216dc3d9ae57d86c16d68a5
parent5ac3601b965b993adcea616254df8de3c66f6ef6
Make utf8_to_uvchr() slightly safer

Recent commit aa3c16bd709ef9b9c8c785af48f368e08f70c74b made this
function safe if the input is a NUL-terminated string.  But if not, it
can read past the end of the buffer.  It used as a limit the maximum
length a UTF-8 code point can be.  But most code points in real-world
use aren't nearly that long, and we know how long that can be by looking
at the first byte.  Therefore, use the length determined by the first
byte as the limit instead of the maximum possible.
utf8.c