/*
- * Copyright (C) 2011 - David Goulet <dgoulet@efficios.com>
+ * Copyright (C) 2011 David Goulet <dgoulet@efficios.com>
*
- * 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; only version 2 of the License.
+ * SPDX-License-Identifier: GPL-2.0-only
*
- * 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.
*/
-#ifdef _COMPAT_ENDIAN_H
+#ifndef _COMPAT_ENDIAN_H
#define _COMPAT_ENDIAN_H
-#ifdef __linux__
+#if defined(__linux__) || defined(__CYGWIN__)
#include <endian.h>
+
+/*
+ * htobe/betoh are not defined for glibc <2.9, so add them
+ * explicitly if they are missing.
+ */
+#ifdef __USE_BSD
+/* Conversion interfaces. */
+# include <byteswap.h>
+
+# if __BYTE_ORDER == __LITTLE_ENDIAN
+# ifndef htobe16
+# define htobe16(x) __bswap_16(x)
+# endif
+# ifndef htole16
+# define htole16(x) (x)
+# endif
+# ifndef be16toh
+# define be16toh(x) __bswap_16(x)
+# endif
+# ifndef le16toh
+# define le16toh(x) (x)
+# endif
+
+# ifndef htobe32
+# define htobe32(x) __bswap_32(x)
+# endif
+# ifndef htole32
+# define htole32(x) (x)
+# endif
+# ifndef be32toh
+# define be32toh(x) __bswap_32(x)
+# endif
+# ifndef le32toh
+# define le32toh(x) (x)
+# endif
+
+# ifndef htobe64
+# define htobe64(x) __bswap_64(x)
+# endif
+# ifndef htole64
+# define htole64(x) (x)
+# endif
+# ifndef be64toh
+# define be64toh(x) __bswap_64(x)
+# endif
+# ifndef le64toh
+# define le64toh(x) (x)
+# endif
+
+# else /* __BYTE_ORDER == __LITTLE_ENDIAN */
+# ifndef htobe16
+# define htobe16(x) (x)
+# endif
+# ifndef htole16
+# define htole16(x) __bswap_16(x)
+# endif
+# ifndef be16toh
+# define be16toh(x) (x)
+# endif
+# ifndef le16toh
+# define le16toh(x) __bswap_16(x)
+# endif
+
+# ifndef htobe32
+# define htobe32(x) (x)
+# endif
+# ifndef htole32
+# define htole32(x) __bswap_32(x)
+# endif
+# ifndef be32toh
+# define be32toh(x) (x)
+# endif
+# ifndef le32toh
+# define le32toh(x) __bswap_32(x)
+# endif
+
+# ifndef htobe64
+# define htobe64(x) (x)
+# endif
+# ifndef htole64
+# define htole64(x) __bswap_64(x)
+# endif
+# ifndef be64toh
+# define be64toh(x) (x)
+# endif
+# ifndef le64toh
+# define le64toh(x) __bswap_64(x)
+# endif
+
+# endif /* __BYTE_ORDER == __LITTLE_ENDIAN */
+#endif /* __USE_BSD */
+
#elif defined(__FreeBSD__)
#include <machine/endian.h>
+
+#elif defined(__sun__)
+#include <sys/byteorder.h>
+#ifndef __BIG_ENDIAN
+#define __BIG_ENDIAN 4321
+#endif /* __BIG_ENDIAN */
+#ifndef __LITTLE_ENDIAN
+#define __LITTLE_ENDIAN 1234
+#endif /* __LITTLE_ENDIAN */
+
+#ifdef _LITTLE_ENDIAN
+#define __BYTE_ORDER __LITTLE_ENDIAN
+#endif /* _LITTLE_ENDIAN */
+#ifdef _BIG_ENDIAN
+#define __BYTE_ORDER __BIG_ENDIAN
+#endif /* _BIG_ENDIAN */
+
+#define LITTLE_ENDIAN __LITTLE_ENDIAN
+#define BIG_ENDIAN __BIG_ENDIAN
+#define PDP_ENDIAN __PDP_ENDIAN
+#define BYTE_ORDER __BYTE_ORDER
+
+#define betoh16(x) BE_16(x)
+#define letoh16(x) LE_16(x)
+#define betoh32(x) BE_32(x)
+#define letoh32(x) LE_32(x)
+#define betoh64(x) BE_64(x)
+#define letoh64(x) LE_64(x)
+#define htobe16(x) BE_16(x)
+#define be16toh(x) BE_16(x)
+#define htobe32(x) BE_32(x)
+#define be32toh(x) BE_32(x)
+#define htobe64(x) BE_64(x)
+#define be64toh(x) BE_64(x)
+
+#elif defined(__APPLE__)
+# include <machine/endian.h>
+# include <libkern/OSByteOrder.h>
+
+# if BYTE_ORDER == LITTLE_ENDIAN
+# define htobe16(x) OSSwapConstInt16(x)
+# define htole16(x) (x)
+# define be16toh(x) OSSwapConstInt16(x)
+# define le16toh(x) (x)
+
+# define htobe32(x) OSSwapConstInt32(x)
+# define htole32(x) (x)
+# define be32toh(x) OSSwapConstInt32(x)
+# define le32toh(x) (x)
+
+# define htobe64(x) OSSwapConstInt64(x)
+# define htole64(x) (x)
+# define be64toh(x) OSSwapConstInt64(x)
+# define le64toh(x) (x)
+
+# else /* BYTE_ORDER == LITTLE_ENDIAN */
+# define htobe16(x) (x)
+# define htole16(x) OSSwapConstInt16(x)
+# define be16toh(x) (x)
+# define le16toh(x) OSSwapConstInt16(x)
+
+# define htobe32(x) (x)
+# define htole32(x) OSSwapConstInt32(x)
+# define be32toh(x) (x)
+# define le32toh(x) OSSwapConstInt32(x)
+
+# define htobe64(x) (x)
+# define htole64(x) OSSwapConstInt64(x)
+# define be64toh(x) (x)
+# define le64toh(x) OSSwapConstInt64(x)
+# endif
+
#else
#error "Please add support for your OS."
#endif