summaryrefslogtreecommitdiff
path: root/Common/Endian.c
diff options
context:
space:
mode:
authorJedidiah Barber <contact@jedbarber.id.au>2021-07-14 11:27:03 +1200
committerJedidiah Barber <contact@jedbarber.id.au>2021-07-14 11:27:03 +1200
commit3cb7fdea950dd2d0377f0d9ad8a88fcb7c48b842 (patch)
treecedbfc08a6bf0bd8cb6ec6c8d8dd94a4e715439b /Common/Endian.c
Initial mirror commitHEADmaster
Diffstat (limited to 'Common/Endian.c')
-rw-r--r--Common/Endian.c57
1 files changed, 57 insertions, 0 deletions
diff --git a/Common/Endian.c b/Common/Endian.c
new file mode 100644
index 0000000..f2b7a27
--- /dev/null
+++ b/Common/Endian.c
@@ -0,0 +1,57 @@
+/*
+ Legal Notice: Some portions of the source code contained in this file were
+ derived from the source code of Encryption for the Masses 2.02a, which is
+ Copyright (c) 1998-2000 Paul Le Roux and which is governed by the 'License
+ Agreement for Encryption for the Masses'. Modifications and additions to
+ the original source code (contained in this file) and all other portions
+ of this file are Copyright (c) 2003-2009 TrueCrypt Developers Association
+ and are governed by the TrueCrypt License 3.0 the full text of which is
+ contained in the file License.txt included in TrueCrypt binary and source
+ code distribution packages. */
+
+#include "Tcdefs.h"
+#include "Common/Endian.h"
+
+
+unsigned __int16 MirrorBytes16 (unsigned __int16 x)
+{
+ return (x << 8) | (x >> 8);
+}
+
+
+unsigned __int32 MirrorBytes32 (unsigned __int32 x)
+{
+ unsigned __int32 n = (unsigned __int8) x;
+ n <<= 8; n |= (unsigned __int8) (x >> 8);
+ n <<= 8; n |= (unsigned __int8) (x >> 16);
+ return (n << 8) | (unsigned __int8) (x >> 24);
+}
+
+#ifndef TC_NO_COMPILER_INT64
+uint64 MirrorBytes64 (uint64 x)
+{
+ uint64 n = (unsigned __int8) x;
+ n <<= 8; n |= (unsigned __int8) (x >> 8);
+ n <<= 8; n |= (unsigned __int8) (x >> 16);
+ n <<= 8; n |= (unsigned __int8) (x >> 24);
+ n <<= 8; n |= (unsigned __int8) (x >> 32);
+ n <<= 8; n |= (unsigned __int8) (x >> 40);
+ n <<= 8; n |= (unsigned __int8) (x >> 48);
+ return (n << 8) | (unsigned __int8) (x >> 56);
+}
+#endif
+
+void
+LongReverse (unsigned __int32 *buffer, unsigned byteCount)
+{
+ unsigned __int32 value;
+
+ byteCount /= sizeof (unsigned __int32);
+ while (byteCount--)
+ {
+ value = *buffer;
+ value = ((value & 0xFF00FF00L) >> 8) | \
+ ((value & 0x00FF00FFL) << 8);
+ *buffer++ = (value << 16) | (value >> 16);
+ }
+}