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[1/4,v2] api: Add a IS_BIT_SET() macro in tst_bitmap.h

Message ID OSZP286MB0871E8F61CE0773AF89CF35FCCC69@OSZP286MB0871.JPNP286.PROD.OUTLOOK.COM
State Accepted
Headers show
Series [1/4,v2] api: Add a IS_BIT_SET() macro in tst_bitmap.h | expand

Commit Message

Xie Ziyao Aug. 25, 2021, 3:39 p.m. UTC 
From: "Xie Ziyao" <ziyaoxie@outlook.com>

Add a IS_BIT_SET() macro in tst_bitmap.h to check whether the n-th bit
of val is set.

Suggested-by: Cyril Hrubis <chrubis@suse.cz>
Signed-off-by: Xie Ziyao <ziyaoxie@outlook.com>
---
v1->v2:
1. Add a IS_BIT_SET() macro in tst_bitmap.h.

 include/tst_bitmap.h | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 include/tst_bitmap.h

--
2.25.1

Comments

Cyril Hrubis Aug. 26, 2021, 3:29 p.m. UTC | #1 
Hi!
> Add a IS_BIT_SET() macro in tst_bitmap.h to check whether the n-th bit
> of val is set.

Since this has been put into the test library I've changed this to
TST_IS_BIT_SET() and pushed, thanks.
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Patch

diff --git a/include/tst_bitmap.h b/include/tst_bitmap.h
new file mode 100644
index 000000000..528a2bdaa
--- /dev/null
+++ b/include/tst_bitmap.h
@@ -0,0 +1,15 @@ 
+/* SPDX-License-Identifier: GPL-2.0-or-later
+ * Copyright (c) Linux Test Project, 2021
+ * Author: Xie Ziyao <ziyaoxie@outlook.com>
+ */
+
+#ifndef TST_BITMAP_H__
+#define TST_BITMAP_H__
+
+/*
+ * Check whether the n-th bit of val is set
+ * @return 0: the n-th bit of val is 0, 1: the n-th bit of val is 1
+ */
+#define IS_BIT_SET(val, n) (((val) & (1<<(n))) >> (n))
+
+#endif /* TST_BITMAP_H__ */