lib/core: Added shortcut for common ASCII-case in `find_beginning_of_char_at`

Signed-off-by: Lucas Bajolet <r4pass@hotmail.com>

diff --git a/lib/core/text/native.nit b/lib/core/text/native.nit
index fad3ae1..a8bbc4b 100644 (file)
--- a/lib/core/text/native.nit
+++ b/lib/core/text/native.nit
@@ -238,6 +238,7 @@ extern class NativeString `{ char* `}
        fun find_beginning_of_char_at(pos: Int): Int do
                var endpos = pos
                var c = self[pos]
+               if c & 0x80u8 == 0x00u8 then return pos
                while c & 0xC0u8 == 0x80u8 do
                        pos -= 1
                        c = self[pos]