Messages in this thread Patch in this message | | | From | Pali Rohár <> | Subject | [PATCH 2/4] exfat: Simplify exfat_utf8_d_cmp() for code points above U+FFFF | Date | Tue, 17 Mar 2020 23:25:53 +0100 |
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If two Unicode code points represented in UTF-16 are different then also their UTF-32 representation must be different. Therefore conversion from UTF-32 to UTF-16 is not needed.
Signed-off-by: Pali Rohár <pali@kernel.org> --- fs/exfat/namei.c | 9 ++------- 1 file changed, 2 insertions(+), 7 deletions(-)
diff --git a/fs/exfat/namei.c b/fs/exfat/namei.c index e0ec4ff366f5..f07cab5fcd28 100644 --- a/fs/exfat/namei.c +++ b/fs/exfat/namei.c @@ -179,14 +179,9 @@ static int exfat_utf8_d_cmp(const struct dentry *dentry, unsigned int len, if (u_a <= 0xFFFF && u_b <= 0xFFFF) { if (exfat_toupper(sb, u_a) != exfat_toupper(sb, u_b)) return 1; - } else if (u_a > 0xFFFF && u_b > 0xFFFF) { - if (exfat_low_surrogate(u_a) != - exfat_low_surrogate(u_b) || - exfat_high_surrogate(u_a) != - exfat_high_surrogate(u_b)) - return 1; } else { - return 1; + if (u_a != u_b) + return 1; } } -- 2.20.1
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