--- src/sys/sys/endian.h	2003/06/17 04:28:58	1.2
+++ src/sys/sys/endian.h	2004/08/23 16:03:44	1.3
@@ -1,4 +1,6 @@
 /*-
+ * Copyright (c) 2004 The DragonFly Project.  All rights reserved.
+ *
  * Copyright (c) 2002 Thomas Moestl <tmm@FreeBSD.org>
  * All rights reserved.
  *
@@ -24,29 +26,163 @@
  * SUCH DAMAGE.
  *
  * $FreeBSD: src/sys/sys/endian.h,v 1.2.2.1 2002/09/09 05:45:04 imp Exp $
- * $DragonFly: src/sys/sys/endian.h,v 1.1 2003/06/16 06:47:33 dillon Exp $
+ * $DragonFly$
  */
 
 #ifndef _SYS_ENDIAN_H_
 #define _SYS_ENDIAN_H_
 
 #include <sys/cdefs.h>
+#include <machine/stdint.h>
 #include <machine/endian.h>
 
-#if BYTE_ORDER == LITTLE_ENDIAN
-#define	htobe16(x)	htons((x))
-#define	htobe32(x)	htonl((x))
+/*
+ * General byte order swapping functions.
+ */
+#define	bswap16(x)	__bswap16(x)
+#define	bswap32(x)	__bswap32(x)
+#define	bswap64(x)	__bswap64(x)
+
+/*
+ * Host to big endian, host to little endian, big endian to host, and little
+ * endian to host byte order functions as detailed in byteorder(9).
+ */
+#if _BYTE_ORDER == _LITTLE_ENDIAN
+#define	htobe16(x)	bswap16((x))
+#define	htobe32(x)	bswap32((x))
+#define	htobe64(x)	bswap64((x))
 #define	htole16(x)	((uint16_t)(x))
 #define	htole32(x)	((uint32_t)(x))
 #define	htole64(x)	((uint64_t)(x))
 
-#define	be16toh(x)	ntohs((x))
-#define	be32toh(x)	ntohl((x))
+#define	be16toh(x)	bswap16((x))
+#define	be32toh(x)	bswap32((x))
+#define	be64toh(x)	bswap64((x))
 #define	le16toh(x)	((uint16_t)(x))
 #define	le32toh(x)	((uint32_t)(x))
 #define	le64toh(x)	((uint64_t)(x))
-#else
-#error "Byte ordering unsupported."
-#endif /* BYTE_ORDER == LITTLE_ENDIAN */
+#else /* _BYTE_ORDER != _LITTLE_ENDIAN */
+#define	htobe16(x)	((uint16_t)(x))
+#define	htobe32(x)	((uint32_t)(x))
+#define	htobe64(x)	((uint64_t)(x))
+#define	htole16(x)	bswap16((x))
+#define	htole32(x)	bswap32((x))
+#define	htole64(x)	bswap64((x))
+
+#define	be16toh(x)	((uint16_t)(x))
+#define	be32toh(x)	((uint32_t)(x))
+#define	be64toh(x)	((uint64_t)(x))
+#define	le16toh(x)	bswap16((x))
+#define	le32toh(x)	bswap32((x))
+#define	le64toh(x)	bswap64((x))
+#endif /* _BYTE_ORDER == _LITTLE_ENDIAN */
+
+/* Alignment-agnostic encode/decode bytestream to/from little/big endian. */
+
+static __inline uint16_t
+be16dec(const void *pp)
+{
+	const uint8_t *p = (const uint8_t *)pp;
+
+	return ((p[0] << 8) | p[1]);
+}
+
+static __inline uint32_t
+be32dec(const void *pp)
+{
+	const uint8_t *p = (const uint8_t *)pp;
+
+	return ((p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]);
+}
+
+static __inline uint64_t
+be64dec(const void *pp)
+{
+	const uint8_t *p = (const uint8_t *)pp;
+
+	return (((uint64_t)be32dec(p) << 32) | be32dec(p + 4));
+}
+
+static __inline uint16_t
+le16dec(const void *pp)
+{
+	const uint8_t *p = (const uint8_t *)pp;
+
+	return ((p[1] << 8) | p[0]);
+}
+
+static __inline uint32_t
+le32dec(const void *pp)
+{
+	const uint8_t *p = (const uint8_t *)pp;
+
+	return ((p[3] << 24) | (p[2] << 16) | (p[1] << 8) | p[0]);
+}
+
+static __inline uint64_t
+le64dec(const void *pp)
+{
+	const uint8_t *p = (const uint8_t *)pp;
+
+	return (((uint64_t)le32dec(p + 4) << 32) | le32dec(p));
+}
+
+static __inline void
+be16enc(void *pp, uint16_t u)
+{
+	uint8_t *p = (uint8_t *)pp;
+
+	p[0] = (u >> 8) & 0xff;
+	p[1] = u & 0xff;
+}
+
+static __inline void
+be32enc(void *pp, uint32_t u)
+{
+	uint8_t *p = (uint8_t *)pp;
+
+	p[0] = (u >> 24) & 0xff;
+	p[1] = (u >> 16) & 0xff;
+	p[2] = (u >> 8) & 0xff;
+	p[3] = u & 0xff;
+}
+
+static __inline void
+be64enc(void *pp, uint64_t u)
+{
+	uint8_t *p = (uint8_t *)pp;
+
+	be32enc(p, u >> 32);
+	be32enc(p + 4, u & 0xffffffff);
+}
+
+static __inline void
+le16enc(void *pp, uint16_t u)
+{
+	uint8_t *p = (uint8_t *)pp;
+
+	p[0] = u & 0xff;
+	p[1] = (u >> 8) & 0xff;
+}
+
+static __inline void
+le32enc(void *pp, uint32_t u)
+{
+	uint8_t *p = (uint8_t *)pp;
+
+	p[0] = u & 0xff;
+	p[1] = (u >> 8) & 0xff;
+	p[2] = (u >> 16) & 0xff;
+	p[3] = (u >> 24) & 0xff;
+}
+
+static __inline void
+le64enc(void *pp, uint64_t u)
+{
+	uint8_t *p = (uint8_t *)pp;
+
+	le32enc(p, u & 0xffffffff);
+	le32enc(p + 4, u >> 32);
+}
 
 #endif	/* _SYS_ENDIAN_H_ */