From b0d4f9de981dbf8756391c9b3231d8e437c2f691 Mon Sep 17 00:00:00 2001
From: Keegan Dent <keegandent@gmail.com>
Date: Wed, 13 Dec 2023 18:49:38 +0000
Subject: [PATCH 1/2] byteinvert function

---
 src/bitstruct/__init__.py | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/bitstruct/__init__.py b/src/bitstruct/__init__.py
index efb4dda..36e94ba 100644
--- a/src/bitstruct/__init__.py
+++ b/src/bitstruct/__init__.py
@@ -676,6 +676,14 @@ def byteswap(fmt, data, offset=0):
     return data_swapped.getvalue()
 
 
+def byteinvert(data):
+    """Reverse bits in `data` bytes. For example, the bytes ``\\x11\\x22``
+    will produce the result ``\\x88\\x44``
+    
+    """
+    pack('<' + 'u8' * len(data), *data)
+
+
 def compile(fmt,
             names=None,
             text_encoding='utf-8',

From f3ac5c839f49d627114e98bc9a61b4e4eec3c04e Mon Sep 17 00:00:00 2001
From: Keegan Dent <keegandent@gmail.com>
Date: Thu, 18 Apr 2024 01:14:48 +0000
Subject: [PATCH 2/2] byteinvert now bytereverse and tested

---
 src/bitstruct/__init__.py | 4 ++--
 tests/test_bitstruct.py   | 9 +++++++++
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/src/bitstruct/__init__.py b/src/bitstruct/__init__.py
index 36e94ba..a333dd0 100644
--- a/src/bitstruct/__init__.py
+++ b/src/bitstruct/__init__.py
@@ -676,12 +676,12 @@ def byteswap(fmt, data, offset=0):
     return data_swapped.getvalue()
 
 
-def byteinvert(data):
+def bytereverse(data):
     """Reverse bits in `data` bytes. For example, the bytes ``\\x11\\x22``
     will produce the result ``\\x88\\x44``
     
     """
-    pack('<' + 'u8' * len(data), *data)
+    return pack('<' + 'u8' * len(data), *data)
 
 
 def compile(fmt,
diff --git a/tests/test_bitstruct.py b/tests/test_bitstruct.py
index 9504488..34ce6d0 100644
--- a/tests/test_bitstruct.py
+++ b/tests/test_bitstruct.py
@@ -277,6 +277,15 @@ def test_byteswap(self):
         unpacked = unpack('u1u5u2u16', byteswap('12', packed))
         self.assertEqual(unpacked, (1, 2, 3, 1024))
 
+    def test_bytereverse(self):
+        """Byte reverse.
+
+        """
+        ref = b'\x11\x22\x33\xFF\x00\x80\x7F'
+        res = b'\x88\x44\xCC\xFF\x00\x01\xFE'
+
+        self.assertEqual(bytereverse(ref), res)
+
     def test_endianness(self):
         """Test pack/unpack with endianness information in the format string.