libutil

misc: Add circular shift functions

Diffstat

2 files changed, 49 insertions, 0 deletions

diff --git a/README.md b/README.md
index 98d4e8f..e4906f6 100644
--- a/README.md
+++ b/README.md
@@ -11,6 +11,7 @@ OMKOV lib is a lightweight generic library to be included locally in projects.
 | endian           | Endianness related functions                        |
 | error            | Error reporting functions                           |
 | mode             | Parse numeric or symbolic POSIX modes               |
+| misc             | Miscellaneous functions                             |
 | optget           | Parse command line options                          |
 
 ## Build Instructions
diff --git a/src/lib/misc.h b/src/lib/misc.h
new file mode 100644
index 0000000..ff25df3
--- /dev/null
+++ b/src/lib/misc.h
@@ -0,0 +1,48 @@
+// misc.h, version 0.1.0
+// Misc header file for OMKOV lib
+// Copyright (C) 2021, Jakob Wakeling
+// All rights reserved.
+
+/*
+OMKOV Permissive Licence, version 1.0
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal with
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+* Redistributions of source code must retain the above copyright notice, this
+  list of conditions and the following disclaimers.
+* Redistributions in binary form must reproduce the above copyright notice, this
+  list of conditions and the following disclaimers in the documentation and/or
+  other materials provided with the distribution.
+* Neither the names of the copyright holders, nor the names of its contributors
+  may be used to endorse or promote products derived from this Software without
+  specific prior written permission.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT
+HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE SOFTWARE.
+*/
+
+#ifndef OMKOV_LIB_MISC_H_RDY6J5JV
+#define OMKOV_LIB_MISC_H_RDY6J5JV
+
+#include <stdint.h>
+
+#define ROL8(x, n)   (uint8_t)(((x) << (n)) | ((x) >>  (8 - (n))))
+#define ROL16(x, n) (uint16_t)(((x) << (n)) | ((x) >> (16 - (n))))
+#define ROL32(x, n) (uint32_t)(((x) << (n)) | ((x) >> (32 - (n))))
+#define ROL64(x, n) (uint64_t)(((x) << (n)) | ((x) >> (64 - (n))))
+
+#define ROR8(x, n)   (uint8_t)(((x) >> (n)) | ((x) <<  (8 - (n))))
+#define ROR16(x, n) (uint16_t)(((x) >> (n)) | ((x) << (16 - (n))))
+#define ROR32(x, n) (uint32_t)(((x) >> (n)) | ((x) << (32 - (n))))
+#define ROR64(x, n) (uint64_t)(((x) >> (n)) | ((x) << (64 - (n))))
+
+#endif // OMKOV_LIB_MISC_H_RDY6J5JV