FreeBSD/Linux Kernel Cross Reference
sys/sys/mchain.h
1 /*-
2 * Copyright (c) 2000, 2001 Boris Popov
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by Boris Popov.
16 * 4. Neither the name of the author nor the names of any co-contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * $FreeBSD: releng/6.1/sys/sys/mchain.h 158179 2006-04-30 16:44:43Z cvs2svn $
33 */
34 #ifndef _SYS_MCHAIN_H_
35 #define _SYS_MCHAIN_H_
36
37 #include <machine/endian.h>
38
39 #ifndef _KERNEL
40 /*
41 * This macros probably belongs to the endian.h
42 */
43 #if (BYTE_ORDER == LITTLE_ENDIAN)
44
45 #define htoles(x) ((u_int16_t)(x))
46 #define letohs(x) ((u_int16_t)(x))
47 #define htolel(x) ((u_int32_t)(x))
48 #define letohl(x) ((u_int32_t)(x))
49 #define htoleq(x) ((int64_t)(x))
50 #define letohq(x) ((int64_t)(x))
51
52 #define htobes(x) (__htons(x))
53 #define betohs(x) (__ntohs(x))
54 #define htobel(x) (__htonl(x))
55 #define betohl(x) (__ntohl(x))
56
57 static __inline int64_t
58 htobeq(int64_t x)
59 {
60 return (int64_t)__htonl((u_int32_t)(x >> 32)) |
61 (int64_t)__htonl((u_int32_t)(x & 0xffffffff)) << 32;
62 }
63
64 static __inline int64_t
65 betohq(int64_t x)
66 {
67 return (int64_t)__ntohl((u_int32_t)(x >> 32)) |
68 (int64_t)__ntohl((u_int32_t)(x & 0xffffffff)) << 32;
69 }
70
71 #else /* (BYTE_ORDER == LITTLE_ENDIAN) */
72
73 #error "Macros for Big-Endians are incomplete"
74
75 /*
76 #define htoles(x) ((u_int16_t)(x))
77 #define letohs(x) ((u_int16_t)(x))
78 #define htolel(x) ((u_int32_t)(x))
79 #define letohl(x) ((u_int32_t)(x))
80 */
81 #endif /* (BYTE_ORDER == LITTLE_ENDIAN) */
82 #endif /* _KERNEL */
83
84
85 #ifdef _KERNEL
86
87 /*
88 * Type of copy for mb_{put|get}_mem()
89 */
90 #define MB_MSYSTEM 0 /* use bcopy() */
91 #define MB_MUSER 1 /* use copyin()/copyout() */
92 #define MB_MINLINE 2 /* use an inline copy loop */
93 #define MB_MZERO 3 /* bzero(), mb_put_mem only */
94 #define MB_MCUSTOM 4 /* use an user defined function */
95
96 struct mbuf;
97 struct mbchain;
98
99 typedef int mb_copy_t(struct mbchain *mbp, c_caddr_t src, caddr_t dst, size_t len);
100
101 struct mbchain {
102 struct mbuf * mb_top; /* head of mbufs chain */
103 struct mbuf * mb_cur; /* current mbuf */
104 int mb_mleft; /* free space in the current mbuf */
105 int mb_count; /* total number of bytes */
106 mb_copy_t * mb_copy; /* user defined copy function */
107 void * mb_udata; /* user data */
108 };
109
110 struct mdchain {
111 struct mbuf * md_top; /* head of mbufs chain */
112 struct mbuf * md_cur; /* current mbuf */
113 u_char * md_pos; /* offset in the current mbuf */
114 };
115
116 int mb_init(struct mbchain *mbp);
117 void mb_initm(struct mbchain *mbp, struct mbuf *m);
118 void mb_done(struct mbchain *mbp);
119 struct mbuf *mb_detach(struct mbchain *mbp);
120 int mb_fixhdr(struct mbchain *mbp);
121 caddr_t mb_reserve(struct mbchain *mbp, int size);
122
123 int mb_put_uint8(struct mbchain *mbp, u_int8_t x);
124 int mb_put_uint16be(struct mbchain *mbp, u_int16_t x);
125 int mb_put_uint16le(struct mbchain *mbp, u_int16_t x);
126 int mb_put_uint32be(struct mbchain *mbp, u_int32_t x);
127 int mb_put_uint32le(struct mbchain *mbp, u_int32_t x);
128 int mb_put_int64be(struct mbchain *mbp, int64_t x);
129 int mb_put_int64le(struct mbchain *mbp, int64_t x);
130 int mb_put_mem(struct mbchain *mbp, c_caddr_t source, int size, int type);
131 int mb_put_mbuf(struct mbchain *mbp, struct mbuf *m);
132 int mb_put_uio(struct mbchain *mbp, struct uio *uiop, int size);
133
134 int md_init(struct mdchain *mdp);
135 void md_initm(struct mdchain *mbp, struct mbuf *m);
136 void md_done(struct mdchain *mdp);
137 void md_append_record(struct mdchain *mdp, struct mbuf *top);
138 int md_next_record(struct mdchain *mdp);
139 int md_get_uint8(struct mdchain *mdp, u_int8_t *x);
140 int md_get_uint16(struct mdchain *mdp, u_int16_t *x);
141 int md_get_uint16le(struct mdchain *mdp, u_int16_t *x);
142 int md_get_uint16be(struct mdchain *mdp, u_int16_t *x);
143 int md_get_uint32(struct mdchain *mdp, u_int32_t *x);
144 int md_get_uint32be(struct mdchain *mdp, u_int32_t *x);
145 int md_get_uint32le(struct mdchain *mdp, u_int32_t *x);
146 int md_get_int64(struct mdchain *mdp, int64_t *x);
147 int md_get_int64be(struct mdchain *mdp, int64_t *x);
148 int md_get_int64le(struct mdchain *mdp, int64_t *x);
149 int md_get_mem(struct mdchain *mdp, caddr_t target, int size, int type);
150 int md_get_mbuf(struct mdchain *mdp, int size, struct mbuf **m);
151 int md_get_uio(struct mdchain *mdp, struct uio *uiop, int size);
152
153 #endif /* ifdef _KERNEL */
154
155 #endif /* !_SYS_MCHAIN_H_ */
Cache object: bd874048fe1474c76587eb5e76008866
|