move common util fcts to /common to avoid common files (e.g. crc) to depend on non-common files

common/commonutil.h

@@ -0,0 +1,55 @@
+//-----------------------------------------------------------------------------
+// Jonathan Westhues, Aug 2005
+//
+// This code is licensed to you under the terms of the GNU GPL, version 2 or,
+// at your option, any later version. See the LICENSE.txt file for the text of
+// the license.
+//-----------------------------------------------------------------------------
+// Utility functions used in many places, not specific to any piece of code.
+//-----------------------------------------------------------------------------
+
+#ifndef __COMMONUTIL_H
+#define __COMMONUTIL_H
+
+#include <stddef.h>
+#include <inttypes.h>
+// endian change for 16bit
+#ifdef __GNUC__
+#ifndef BSWAP_16
+#define BSWAP_16(x) __builtin_bswap16(x)
+#endif
+#else
+#ifdef _MSC_VER
+#ifndef BSWAP_16
+#define BSWAP_16(x) _byteswap_ushort(x)
+#endif
+#else
+#ifndef BSWAP_16
+# define BSWAP_16(x) ((( ((x) & 0xFF00 ) >> 8))| ( (((x) & 0x00FF) << 8)))
+#endif
+#endif
+#endif
+
+#ifndef BITMASK
+# define BITMASK(X) (1 << (X))
+#endif
+#ifndef ARRAYLEN
+# define ARRAYLEN(x) (sizeof(x)/sizeof((x)[0]))
+#endif
+
+#ifndef NTIME
+# define NTIME(n) for (int _index = 0; _index < n; _index++)
+#endif
+
+uint32_t reflect(uint32_t v, int b); // used in crc.c ...
+uint8_t reflect8(uint8_t b);         // dedicated 8bit reversal
+uint16_t reflect16(uint16_t b);      // dedicated 16bit reversal
+
+void num_to_bytes(uint64_t n, size_t len, uint8_t *dest);
+uint64_t bytes_to_num(uint8_t *src, size_t len);
+
+void rol(uint8_t *data, const size_t len);
+void lsl(uint8_t *data, size_t len);
+int32_t le24toh(uint8_t data[3]);
+
+#endif