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Diffstat (limited to 'StdLib/Include/sys/endian.h')
| -rw-r--r-- | StdLib/Include/sys/endian.h | 309 |
1 files changed, 309 insertions, 0 deletions
diff --git a/StdLib/Include/sys/endian.h b/StdLib/Include/sys/endian.h new file mode 100644 index 0000000000..dfe013fa40 --- /dev/null +++ b/StdLib/Include/sys/endian.h @@ -0,0 +1,309 @@ +/** @file
+ Byte order related definitions and declarations.
+
+ Copyright (c) 2010 - 2011, Intel Corporation. All rights reserved.<BR>
+ This program and the accompanying materials are licensed and made available
+ under the terms and conditions of the BSD License that accompanies this
+ distribution. The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+ Copyright (c) 1990, 1993
+ The Regents of the University of California. All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions
+ are met:
+ - Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+ - Redistributions in binary form must reproduce the above copyright
+ notice, this list of conditions and the following disclaimer in the
+ documentation and/or other materials provided with the distribution.
+ - Neither the name of the University nor the names of its contributors
+ may be used to endorse or promote products derived from this software
+ without specific prior written permission.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
+ LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ POSSIBILITY OF SUCH DAMAGE.
+
+ NetBSD: endian.h,v 1.24 2006/05/05 15:08:11 christos Exp
+ endian.h 8.1 (Berkeley) 6/11/93
+**/
+#ifndef _SYS_ENDIAN_H_
+#define _SYS_ENDIAN_H_
+
+#include <sys/EfiCdefs.h>
+
+/*
+ * Definitions for byte order, according to byte significance from low
+ * address to high.
+ */
+#define _LITTLE_ENDIAN 1234 /* LSB first: i386, vax */
+#define _BIG_ENDIAN 4321 /* MSB first: 68000, ibm, net */
+#define _PDP_ENDIAN 3412 /* LSB first in word, MSW first in long */
+
+
+#if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE)
+#ifndef _LOCORE
+
+/* C-family endian-ness definitions */
+
+#include <sys/ansi.h>
+#include <sys/types.h>
+
+#ifndef in_addr_t
+typedef __in_addr_t in_addr_t;
+#define in_addr_t __in_addr_t
+#endif
+
+#ifndef in_port_t
+typedef __in_port_t in_port_t;
+#define in_port_t __in_port_t
+#endif
+
+__BEGIN_DECLS
+uint32_t htonl(uint32_t) __attribute__((__const__));
+uint16_t htons(uint16_t) __attribute__((__const__));
+uint32_t ntohl(uint32_t) __attribute__((__const__));
+uint16_t ntohs(uint16_t) __attribute__((__const__));
+__END_DECLS
+
+#endif /* !_LOCORE */
+#endif /* _XOPEN_SOURCE || _NETBSD_SOURCE */
+
+
+#include <machine/endian_machdep.h>
+
+/*
+ * Define the order of 32-bit words in 64-bit words.
+ */
+#if _BYTE_ORDER == _LITTLE_ENDIAN
+#define _QUAD_HIGHWORD 1
+#define _QUAD_LOWWORD 0
+#endif
+
+#if _BYTE_ORDER == _BIG_ENDIAN
+#define _QUAD_HIGHWORD 0
+#define _QUAD_LOWWORD 1
+#endif
+
+
+#if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE)
+/*
+ * Traditional names for byteorder. These are defined as the numeric
+ * sequences so that third party code can "#define XXX_ENDIAN" and not
+ * cause errors.
+ */
+#define LITTLE_ENDIAN 1234 /* LSB first: i386, vax */
+#define BIG_ENDIAN 4321 /* MSB first: 68000, ibm, net */
+#define PDP_ENDIAN 3412 /* LSB first in word, MSW first in long */
+#define BYTE_ORDER _BYTE_ORDER
+
+#ifndef _LOCORE
+
+#include <machine/bswap.h>
+
+/*
+ * Macros for network/external number representation conversion.
+ */
+#if BYTE_ORDER == BIG_ENDIAN && !defined(__lint__)
+#define ntohl(x) (x)
+#define ntohs(x) (x)
+#define htonl(x) (x)
+#define htons(x) (x)
+
+#define NTOHL(x) (void) (x)
+#define NTOHS(x) (void) (x)
+#define HTONL(x) (void) (x)
+#define HTONS(x) (void) (x)
+
+#else /* LITTLE_ENDIAN || !defined(__lint__) */
+
+#define ntohl(x) bswap32((uint32_t)(x))
+#define ntohs(x) bswap16((uint16_t)(x))
+#define htonl(x) bswap32((uint32_t)(x))
+#define htons(x) bswap16((uint16_t)(x))
+
+#define NTOHL(x) (x) = ntohl((uint32_t)(x))
+#define NTOHS(x) (x) = ntohs((uint16_t)(x))
+#define HTONL(x) (x) = htonl((uint32_t)(x))
+#define HTONS(x) (x) = htons((uint16_t)(x))
+#endif /* LITTLE_ENDIAN || !defined(__lint__) */
+
+/*
+ * Macros to convert to a specific endianness.
+ */
+
+#if BYTE_ORDER == BIG_ENDIAN
+
+#define htobe16(x) (x)
+#define htobe32(x) (x)
+#define htobe64(x) (x)
+#define htole16(x) bswap16((uint16_t)(x))
+#define htole32(x) bswap32((uint32_t)(x))
+#define htole64(x) bswap64((uint64_t)(x))
+
+#define HTOBE16(x) (void) (x)
+#define HTOBE32(x) (void) (x)
+#define HTOBE64(x) (void) (x)
+#define HTOLE16(x) (x) = bswap16((uint16_t)(x))
+#define HTOLE32(x) (x) = bswap32((uint32_t)(x))
+#define HTOLE64(x) (x) = bswap64((uint64_t)(x))
+
+#else /* LITTLE_ENDIAN */
+
+#define htobe16(x) bswap16((uint16_t)(x))
+#define htobe32(x) bswap32((uint32_t)(x))
+#define htobe64(x) bswap64((uint64_t)(x))
+#define htole16(x) (x)
+#define htole32(x) (x)
+#define htole64(x) (x)
+
+#define HTOBE16(x) (x) = bswap16((uint16_t)(x))
+#define HTOBE32(x) (x) = bswap32((uint32_t)(x))
+#define HTOBE64(x) (x) = bswap64((uint64_t)(x))
+#define HTOLE16(x) (void) (x)
+#define HTOLE32(x) (void) (x)
+#define HTOLE64(x) (void) (x)
+
+#endif /* LITTLE_ENDIAN */
+
+#define be16toh(x) htobe16(x)
+#define be32toh(x) htobe32(x)
+#define be64toh(x) htobe64(x)
+#define le16toh(x) htole16(x)
+#define le32toh(x) htole32(x)
+#define le64toh(x) htole64(x)
+
+#define BE16TOH(x) HTOBE16(x)
+#define BE32TOH(x) HTOBE32(x)
+#define BE64TOH(x) HTOBE64(x)
+#define LE16TOH(x) HTOLE16(x)
+#define LE32TOH(x) HTOLE32(x)
+#define LE64TOH(x) HTOLE64(x)
+
+/*
+ * Routines to encode/decode big- and little-endian multi-octet values
+ * to/from an octet stream.
+ */
+
+static __inline void __unused
+be16enc(void *buf, uint16_t u)
+{
+ uint8_t *p = (uint8_t *)buf;
+
+ p[0] = (uint8_t)(((unsigned)u >> 8) & 0xff);
+ p[1] = (uint8_t)(u & 0xff);
+}
+
+static __inline void __unused
+le16enc(void *buf, uint16_t u)
+{
+ uint8_t *p = (uint8_t *)buf;
+
+ p[0] = (uint8_t)(u & 0xff);
+ p[1] = (uint8_t)(((unsigned)u >> 8) & 0xff);
+}
+
+static __inline uint16_t __unused
+be16dec(const void *buf)
+{
+ const uint8_t *p = (const uint8_t *)buf;
+
+ return ((p[0] << 8) | p[1]);
+}
+
+static __inline uint16_t __unused
+le16dec(const void *buf)
+{
+ const uint8_t *p = (const uint8_t *)buf;
+
+ return ((p[1] << 8) | p[0]);
+}
+
+static __inline void __unused
+be32enc(void *buf, uint32_t u)
+{
+ uint8_t *p = (uint8_t *)buf;
+
+ p[0] = (uint8_t)((u >> 24) & 0xff);
+ p[1] = (uint8_t)((u >> 16) & 0xff);
+ p[2] = (uint8_t)((u >> 8) & 0xff);
+ p[3] = (uint8_t)(u & 0xff);
+}
+
+static __inline void __unused
+le32enc(void *buf, uint32_t u)
+{
+ uint8_t *p = (uint8_t *)buf;
+
+ p[0] = (uint8_t)(u & 0xff);
+ p[1] = (uint8_t)((u >> 8) & 0xff);
+ p[2] = (uint8_t)((u >> 16) & 0xff);
+ p[3] = (uint8_t)((u >> 24) & 0xff);
+}
+
+static __inline uint32_t __unused
+be32dec(const void *buf)
+{
+ const uint8_t *p = (const uint8_t *)buf;
+
+ return ((p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]);
+}
+
+static __inline uint32_t __unused
+le32dec(const void *buf)
+{
+ const uint8_t *p = (const uint8_t *)buf;
+
+ return ((p[3] << 24) | (p[2] << 16) | (p[1] << 8) | p[0]);
+}
+
+static __inline void __unused
+be64enc(void *buf, uint64_t u)
+{
+ uint8_t *p = (uint8_t *)buf;
+
+ be32enc(p, (uint32_t)(u >> 32));
+ be32enc(p + 4, (uint32_t)(u & 0xffffffffULL));
+}
+
+static __inline void __unused
+le64enc(void *buf, uint64_t u)
+{
+ uint8_t *p = (uint8_t *)buf;
+
+ le32enc(p, (uint32_t)(u & 0xffffffffULL));
+ le32enc(p + 4, (uint32_t)(u >> 32));
+}
+
+static __inline uint64_t __unused
+be64dec(const void *buf)
+{
+ const uint8_t *p = (const uint8_t *)buf;
+
+ return (((uint64_t)be32dec(p) << 32) | be32dec(p + 4));
+}
+
+static __inline uint64_t __unused
+le64dec(const void *buf)
+{
+ const uint8_t *p = (const uint8_t *)buf;
+
+ return (le32dec(p) | ((uint64_t)le32dec(p + 4) << 32));
+}
+
+#endif /* !_LOCORE */
+#endif /* _XOPEN_SOURCE || _NETBSD_SOURCE */
+#endif /* !_SYS_ENDIAN_H_ */
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