hexedit: code shrink

function                                             old     new   delta
hexedit_main                                        1176    1169      -7

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

1 files changed, 5 insertions, 4 deletions

diff --git a/miscutils/hexedit.c b/miscutils/hexedit.c
index bdb7683f2..1d683b7de 100644
--- a/miscutils/hexedit.c
+++ b/miscutils/hexedit.c
@@ -274,7 +274,7 @@ int hexedit_main(int argc UNUSED_PARAM, char **argv)
 
         for (;;) {
                 unsigned cnt;
-                int32_t key = key; // for compiler
+                int32_t key = key; /* for compiler */
                 uint8_t byte;
 
                 fflush_all();
@@ -286,11 +286,12 @@ int hexedit_main(int argc UNUSED_PARAM, char **argv)
                         key = CTRL('X');
 
                 cnt = 1;
+                if ((unsigned)(key - 'A') <= 'Z' - 'A')
+                        key |= 0x20; /* convert A-Z to a-z */
                 switch (key) {
-                case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
                 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
-                        /* lowercase, then convert to '0'+10...15 */
-                        key = (key | 0x20) - ('a' - '0' - 10);
+                        /* convert to '0'+10...15 */
+                        key = key - ('a' - '0' - 10);
                         /* fall through */
                 case '0': case '1': case '2': case '3': case '4':
                 case '5': case '6': case '7': case '8': case '9':