[PATCHv2 6/6] diff: use HAS_MULTI_BITS instead of counting bits manually

[Stefan Beller]

This aligns the style to the previous patch.

Signed-off-by: Stefan Beller <sbel...@google.com>
---
 diff.c | 15 +++++----------
 1 file changed, 5 insertions(+), 10 deletions(-)

diff --git a/diff.c b/diff.c
index 42858d4c7d..c2ee81a1fa 100644
--- a/diff.c
+++ b/diff.c
@@ -4107,20 +4107,15 @@ void diff_setup(struct diff_options *options)
 
 void diff_setup_done(struct diff_options *options)
 {
-       int count = 0;
+       unsigned check_mask = DIFF_FORMAT_NAME |
+                             DIFF_FORMAT_NAME_STATUS |
+                             DIFF_FORMAT_CHECKDIFF |
+                             DIFF_FORMAT_NO_OUTPUT;
 
        if (options->set_default)
                options->set_default(options);
 
-       if (options->output_format & DIFF_FORMAT_NAME)
-               count++;
-       if (options->output_format & DIFF_FORMAT_NAME_STATUS)
-               count++;
-       if (options->output_format & DIFF_FORMAT_CHECKDIFF)
-               count++;
-       if (options->output_format & DIFF_FORMAT_NO_OUTPUT)
-               count++;
-       if (count > 1)
+       if (HAS_MULTI_BITS(options->output_format & check_mask))
                die(_("--name-only, --name-status, --check and -s are mutually 
exclusive"));
 
        if (HAS_MULTI_BITS(options->pickaxe_opts & DIFF_PICKAXE_KINDS_MASK))
-- 
2.16.0.rc0.223.g4a4ac83678-goog