From 6b0a52dd9b96e10f1796e931c752eb3bcf193339 Mon Sep 17 00:00:00 2001
From: Vladimir Kotal <vlada@kotalovi.cz>
Date: Sun, 12 May 2024 22:50:55 +0200
Subject: [PATCH] add example on bitwise operations on structure bitfields

---
 modules/structure-bit-fields.md |  2 ++
 src/bitfield-bitwise-ops.c      | 18 ++++++++++++++++++
 2 files changed, 20 insertions(+)
 create mode 100644 src/bitfield-bitwise-ops.c

diff --git a/modules/structure-bit-fields.md b/modules/structure-bit-fields.md
index c5a10c63..d9d85ab1 100644
--- a/modules/structure-bit-fields.md
+++ b/modules/structure-bit-fields.md
@@ -41,3 +41,5 @@ foo.a++; // will wrap around to 0 since this is unsigned
 ```
 
 #source bitfield-wraparound.c
+
+#source bitfield-bitwise-ops.c
diff --git a/src/bitfield-bitwise-ops.c b/src/bitfield-bitwise-ops.c
new file mode 100644
index 00000000..ba3b6d2e
--- /dev/null
+++ b/src/bitfield-bitwise-ops.c
@@ -0,0 +1,18 @@
+#include <stdio.h>
+
+struct foo_s {
+	unsigned int a : 3;
+	unsigned int b : 5;
+} foo;
+
+int
+main(void)
+{
+	foo.a = 5;  /*   101 */
+	foo.b = 16; /* 10000 */
+
+	foo.a = foo.a ^ foo.b;
+	unsigned int xor = foo.a ^ foo.b;
+
+	printf("%u vs %u\n", foo.a, xor);
+}