dd: code shrink

function                                             old     new   delta
dd_main                                             1475    1469      -6

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

diff --git a/coreutils/dd.c b/coreutils/dd.c
index 9299f58..2838f63 100644 (file)
--- a/coreutils/dd.c
+++ b/coreutils/dd.c
@@ -395,7 +395,8 @@ int dd_main(int argc UNUSED_PARAM, char **argv)
                        n = 0;
                }
                if (flags & FLAG_SWAB) {
-                       uint16_t *p16, *end;
+                       uint16_t *p16;
+                       ssize_t n2;
 
                        /* Our code allows only last read to be odd-sized */
                        if (prev_read_size & 1)
@@ -408,8 +409,8 @@ int dd_main(int argc UNUSED_PARAM, char **argv)
                         * prints "wqe".
                         */
                        p16 = (void*) ibuf;
-                       end = (void*) (ibuf + (n & ~(ssize_t)1));
-                       while (p16 < end) {
+                       n2 = (n >> 1);
+                       while (--n2 >= 0) {
                                *p16 = bswap_16(*p16);
                                p16++;
                        }