dd: code shrink

function                                             old     new   delta
dd_main                                             1475    1469      -6

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

1 files changed, 4 insertions, 3 deletions

diff --git a/coreutils/dd.c b/coreutils/dd.c
index 9299f58bc..2838f6341 100644
--- 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++;
                         }