unicode: fix handling of short 1-4 char tables

function                                             old     new   delta
in_uint16_table                                       92     107     +15

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/libbb/unicode.c b/libbb/unicode.c
index 79481f159..bfeaef895 100644
--- a/libbb/unicode.c
+++ b/libbb/unicode.c
@@ -306,8 +306,10 @@ static int in_uint16_table(unsigned ucs, const uint16_t *table, unsigned max)
 	unsigned first, last;
 
 	first = table[0] >> 2;
-	last = first + (table[0] & 3);
-	if (ucs < first || ucs > last)
+	if (ucs < first)
+		return 0;
+	last = (table[max] >> 2) + (table[max] & 3);
+	if (ucs > last)
 		return 0;
 
 	min = 0;