include: add macros for endian conversion

diff --git a/include/aversive/endian.h b/include/aversive/endian.h
new file mode 100644 (file)
index 0000000..5e33a19
--- /dev/null
+++ b/include/aversive/endian.h
@@ -0,0 +1,65 @@
+/*
+ *  Copyright Droids Corporation (2011)
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ *  Revision : $Id: md5c.c,v 1.3.4.1 2006-11-26 21:06:02 zer0 Exp $
+ *
+ */
+
+#ifndef _AVERSIVE_ENDIAN_H_
+#define _AVERSIVE_ENDIAN_H_
+
+static inline uint16_t bswap16(uint16_t x)
+{
+       return (uint16_t)(((x & 0x00ffU) << 8) |
+                         ((x & 0xff00U) >> 8));
+}
+
+static inline uint32_t bswap32(uint32_t x)
+{
+       return  ((x & 0x000000ffUL) << 24) |
+               ((x & 0x0000ff00UL) << 8) |
+               ((x & 0x00ff0000UL) >> 8) |
+               ((x & 0xff000000UL) >> 24);
+}
+
+static inline uint64_t bswap64(uint64_t x)
+{
+       return  ((x & 0x00000000000000ffULL) << 56) |
+               ((x & 0x000000000000ff00ULL) << 40) |
+               ((x & 0x0000000000ff0000ULL) << 24) |
+               ((x & 0x00000000ff000000ULL) <<  8) |
+               ((x & 0x000000ff00000000ULL) >>  8) |
+               ((x & 0x0000ff0000000000ULL) >> 24) |
+               ((x & 0x00ff000000000000ULL) >> 40) |
+               ((x & 0xff00000000000000ULL) >> 56);
+}
+
+#if BYTE_ORDER == LITTLE_ENDIAN
+#define ntohs(x) bswap16(x)
+#define ntohl(x) bswap32(x)
+#define ntohll(x) bswap64(x)
+#else
+#define ntohs(x) (x)
+#define ntohl(x) (x)
+#define ntohll(x) (x)
+#endif
+
+#define htons ntohs
+#define htonl ntohl
+#define htonll ntohll
+
+#endif