Annotation of src/sys/sys/endian.h, Revision 1.24
1.24 ! christos 1: /* $NetBSD: endian.h,v 1.23 2006/02/04 01:07:20 uwe Exp $ */
1.1 simonb 2:
3: /*
4: * Copyright (c) 1987, 1991, 1993
5: * The Regents of the University of California. All rights reserved.
6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
1.7 agc 15: * 3. Neither the name of the University nor the names of its contributors
1.1 simonb 16: * may be used to endorse or promote products derived from this software
17: * without specific prior written permission.
18: *
19: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29: * SUCH DAMAGE.
30: *
31: * @(#)endian.h 8.1 (Berkeley) 6/11/93
32: */
33:
34: #ifndef _SYS_ENDIAN_H_
35: #define _SYS_ENDIAN_H_
1.2 mycroft 36:
1.6 bjh21 37: #include <sys/featuretest.h>
38:
1.1 simonb 39: /*
40: * Definitions for byte order, according to byte significance from low
41: * address to high.
42: */
43: #define _LITTLE_ENDIAN 1234 /* LSB first: i386, vax */
44: #define _BIG_ENDIAN 4321 /* MSB first: 68000, ibm, net */
45: #define _PDP_ENDIAN 3412 /* LSB first in word, MSW first in long */
1.3 soren 46:
1.15 perry 47:
48: #if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE)
49: #ifndef _LOCORE
50:
51: /* C-family endian-ness definitions */
52:
53: #include <sys/ansi.h>
54: #include <sys/cdefs.h>
55: #include <sys/types.h>
56:
57: #ifndef in_addr_t
58: typedef __in_addr_t in_addr_t;
59: #define in_addr_t __in_addr_t
60: #endif
61:
62: #ifndef in_port_t
63: typedef __in_port_t in_port_t;
64: #define in_port_t __in_port_t
65: #endif
66:
67: __BEGIN_DECLS
1.24 ! christos 68: uint32_t htonl(uint32_t) __attribute__((__const__));
! 69: uint16_t htons(uint16_t) __attribute__((__const__));
! 70: uint32_t ntohl(uint32_t) __attribute__((__const__));
! 71: uint16_t ntohs(uint16_t) __attribute__((__const__));
1.15 perry 72: __END_DECLS
73:
74: #endif /* !_LOCORE */
75: #endif /* _XOPEN_SOURCE || _NETBSD_SOURCE */
76:
77:
1.3 soren 78: #include <machine/endian_machdep.h>
1.1 simonb 79:
80: /*
81: * Define the order of 32-bit words in 64-bit words.
82: */
83: #if _BYTE_ORDER == _LITTLE_ENDIAN
84: #define _QUAD_HIGHWORD 1
85: #define _QUAD_LOWWORD 0
86: #endif
87:
88: #if _BYTE_ORDER == _BIG_ENDIAN
89: #define _QUAD_HIGHWORD 0
90: #define _QUAD_LOWWORD 1
91: #endif
92:
93:
1.6 bjh21 94: #if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE)
1.1 simonb 95: /*
96: * Traditional names for byteorder. These are defined as the numeric
97: * sequences so that third party code can "#define XXX_ENDIAN" and not
98: * cause errors.
99: */
100: #define LITTLE_ENDIAN 1234 /* LSB first: i386, vax */
101: #define BIG_ENDIAN 4321 /* MSB first: 68000, ibm, net */
102: #define PDP_ENDIAN 3412 /* LSB first in word, MSW first in long */
103: #define BYTE_ORDER _BYTE_ORDER
104:
105: #ifndef _LOCORE
106:
1.22 uwe 107: #include <machine/bswap.h>
108:
1.1 simonb 109: /*
110: * Macros for network/external number representation conversion.
111: */
1.8 kleink 112: #if BYTE_ORDER == BIG_ENDIAN && !defined(__lint__)
1.1 simonb 113: #define ntohl(x) (x)
114: #define ntohs(x) (x)
115: #define htonl(x) (x)
116: #define htons(x) (x)
117:
118: #define NTOHL(x) (void) (x)
119: #define NTOHS(x) (void) (x)
120: #define HTONL(x) (void) (x)
121: #define HTONS(x) (void) (x)
122:
1.8 kleink 123: #else /* LITTLE_ENDIAN || !defined(__lint__) */
1.1 simonb 124:
1.23 uwe 125: #define ntohl(x) bswap32((uint32_t)(x))
126: #define ntohs(x) bswap16((uint16_t)(x))
127: #define htonl(x) bswap32((uint32_t)(x))
128: #define htons(x) bswap16((uint16_t)(x))
1.21 dsl 129:
1.4 itojun 130: #define NTOHL(x) (x) = ntohl((uint32_t)(x))
131: #define NTOHS(x) (x) = ntohs((uint16_t)(x))
132: #define HTONL(x) (x) = htonl((uint32_t)(x))
133: #define HTONS(x) (x) = htons((uint16_t)(x))
1.8 kleink 134: #endif /* LITTLE_ENDIAN || !defined(__lint__) */
1.1 simonb 135:
136: /*
137: * Macros to convert to a specific endianness.
138: */
139:
140: #if BYTE_ORDER == BIG_ENDIAN
141:
142: #define htobe16(x) (x)
143: #define htobe32(x) (x)
144: #define htobe64(x) (x)
1.19 perry 145: #define htole16(x) bswap16((uint16_t)(x))
146: #define htole32(x) bswap32((uint32_t)(x))
147: #define htole64(x) bswap64((uint64_t)(x))
1.1 simonb 148:
149: #define HTOBE16(x) (void) (x)
150: #define HTOBE32(x) (void) (x)
151: #define HTOBE64(x) (void) (x)
1.19 perry 152: #define HTOLE16(x) (x) = bswap16((uint16_t)(x))
153: #define HTOLE32(x) (x) = bswap32((uint32_t)(x))
154: #define HTOLE64(x) (x) = bswap64((uint64_t)(x))
1.1 simonb 155:
156: #else /* LITTLE_ENDIAN */
157:
1.19 perry 158: #define htobe16(x) bswap16((uint16_t)(x))
159: #define htobe32(x) bswap32((uint32_t)(x))
160: #define htobe64(x) bswap64((uint64_t)(x))
1.1 simonb 161: #define htole16(x) (x)
162: #define htole32(x) (x)
163: #define htole64(x) (x)
164:
1.19 perry 165: #define HTOBE16(x) (x) = bswap16((uint16_t)(x))
166: #define HTOBE32(x) (x) = bswap32((uint32_t)(x))
167: #define HTOBE64(x) (x) = bswap64((uint64_t)(x))
1.1 simonb 168: #define HTOLE16(x) (void) (x)
169: #define HTOLE32(x) (void) (x)
170: #define HTOLE64(x) (void) (x)
171:
172: #endif /* LITTLE_ENDIAN */
173:
174: #define be16toh(x) htobe16(x)
175: #define be32toh(x) htobe32(x)
176: #define be64toh(x) htobe64(x)
177: #define le16toh(x) htole16(x)
178: #define le32toh(x) htole32(x)
179: #define le64toh(x) htole64(x)
180:
181: #define BE16TOH(x) HTOBE16(x)
182: #define BE32TOH(x) HTOBE32(x)
183: #define BE64TOH(x) HTOBE64(x)
184: #define LE16TOH(x) HTOLE16(x)
185: #define LE32TOH(x) HTOLE32(x)
186: #define LE64TOH(x) HTOLE64(x)
187:
1.10 thorpej 188: /*
189: * Routines to encode/decode big- and little-endian multi-octet values
190: * to/from an octet stream.
191: */
192:
1.20 perry 193: static __inline void __unused
1.10 thorpej 194: be16enc(void *buf, uint16_t u)
195: {
1.13 tron 196: uint8_t *p = (uint8_t *)buf;
1.10 thorpej 197:
1.11 thorpej 198: p[0] = ((unsigned)u >> 8) & 0xff;
1.10 thorpej 199: p[1] = u & 0xff;
200: }
201:
1.20 perry 202: static __inline void __unused
1.10 thorpej 203: le16enc(void *buf, uint16_t u)
204: {
1.13 tron 205: uint8_t *p = (uint8_t *)buf;
1.10 thorpej 206:
207: p[0] = u & 0xff;
1.11 thorpej 208: p[1] = ((unsigned)u >> 8) & 0xff;
1.10 thorpej 209: }
210:
1.20 perry 211: static __inline uint16_t __unused
1.10 thorpej 212: be16dec(const void *buf)
213: {
1.14 tron 214: const uint8_t *p = (const uint8_t *)buf;
1.10 thorpej 215:
216: return ((p[0] << 8) | p[1]);
217: }
218:
1.20 perry 219: static __inline uint16_t __unused
1.10 thorpej 220: le16dec(const void *buf)
221: {
1.14 tron 222: const uint8_t *p = (const uint8_t *)buf;
1.10 thorpej 223:
224: return ((p[1] << 8) | p[0]);
225: }
226:
1.20 perry 227: static __inline void __unused
1.10 thorpej 228: be32enc(void *buf, uint32_t u)
229: {
1.13 tron 230: uint8_t *p = (uint8_t *)buf;
1.10 thorpej 231:
232: p[0] = (u >> 24) & 0xff;
233: p[1] = (u >> 16) & 0xff;
234: p[2] = (u >> 8) & 0xff;
235: p[3] = u & 0xff;
236: }
237:
1.20 perry 238: static __inline void __unused
1.10 thorpej 239: le32enc(void *buf, uint32_t u)
240: {
1.13 tron 241: uint8_t *p = (uint8_t *)buf;
1.10 thorpej 242:
243: p[0] = u & 0xff;
244: p[1] = (u >> 8) & 0xff;
245: p[2] = (u >> 16) & 0xff;
246: p[3] = (u >> 24) & 0xff;
247: }
248:
1.20 perry 249: static __inline uint32_t __unused
1.10 thorpej 250: be32dec(const void *buf)
251: {
1.14 tron 252: const uint8_t *p = (const uint8_t *)buf;
1.10 thorpej 253:
254: return ((p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]);
255: }
256:
1.20 perry 257: static __inline uint32_t __unused
1.10 thorpej 258: le32dec(const void *buf)
259: {
1.14 tron 260: const uint8_t *p = (const uint8_t *)buf;
1.10 thorpej 261:
262: return ((p[3] << 24) | (p[2] << 16) | (p[1] << 8) | p[0]);
263: }
264:
1.20 perry 265: static __inline void __unused
1.10 thorpej 266: be64enc(void *buf, uint64_t u)
267: {
1.13 tron 268: uint8_t *p = (uint8_t *)buf;
1.10 thorpej 269:
1.12 thorpej 270: be32enc(p, (uint32_t)(u >> 32));
271: be32enc(p + 4, (uint32_t)(u & 0xffffffffULL));
1.10 thorpej 272: }
273:
1.20 perry 274: static __inline void __unused
1.10 thorpej 275: le64enc(void *buf, uint64_t u)
276: {
1.13 tron 277: uint8_t *p = (uint8_t *)buf;
1.10 thorpej 278:
1.12 thorpej 279: le32enc(p, (uint32_t)(u & 0xffffffffULL));
280: le32enc(p + 4, (uint32_t)(u >> 32));
1.10 thorpej 281: }
282:
1.20 perry 283: static __inline uint64_t __unused
1.10 thorpej 284: be64dec(const void *buf)
285: {
1.14 tron 286: const uint8_t *p = (const uint8_t *)buf;
1.10 thorpej 287:
288: return (((uint64_t)be32dec(p) << 32) | be32dec(p + 4));
289: }
290:
1.20 perry 291: static __inline uint64_t __unused
1.10 thorpej 292: le64dec(const void *buf)
293: {
1.14 tron 294: const uint8_t *p = (const uint8_t *)buf;
1.10 thorpej 295:
296: return (le32dec(p) | ((uint64_t)le32dec(p + 4) << 32));
297: }
298:
1.1 simonb 299: #endif /* !_LOCORE */
1.9 thorpej 300: #endif /* _XOPEN_SOURCE || _NETBSD_SOURCE */
1.1 simonb 301: #endif /* !_SYS_ENDIAN_H_ */
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