mchain.h revision 148517
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: head/sys/sys/mchain.h 148517 2005-07-29 13:22:37Z imura $ 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 57static __inline int64_t 58htobeq(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 64static __inline int64_t 65betohq(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 96struct mbuf; 97struct mbchain; 98 99typedef int mb_copy_t(struct mbchain *mbp, c_caddr_t src, caddr_t dst, 100 size_t *srclen, size_t *dstlen); 101 102struct mbchain { 103 struct mbuf * mb_top; /* head of mbufs chain */ 104 struct mbuf * mb_cur; /* current mbuf */ 105 int mb_mleft; /* free space in the current mbuf */ 106 int mb_count; /* total number of bytes */ 107 mb_copy_t * mb_copy; /* user defined copy function */ 108 void * mb_udata; /* user data */ 109}; 110 111struct mdchain { 112 struct mbuf * md_top; /* head of mbufs chain */ 113 struct mbuf * md_cur; /* current mbuf */ 114 u_char * md_pos; /* offset in the current mbuf */ 115}; 116 117int mb_init(struct mbchain *mbp); 118void mb_initm(struct mbchain *mbp, struct mbuf *m); 119void mb_done(struct mbchain *mbp); 120struct mbuf *mb_detach(struct mbchain *mbp); 121int mb_fixhdr(struct mbchain *mbp); 122caddr_t mb_reserve(struct mbchain *mbp, int size); 123 124int mb_put_uint8(struct mbchain *mbp, u_int8_t x); 125int mb_put_uint16be(struct mbchain *mbp, u_int16_t x); 126int mb_put_uint16le(struct mbchain *mbp, u_int16_t x); 127int mb_put_uint32be(struct mbchain *mbp, u_int32_t x); 128int mb_put_uint32le(struct mbchain *mbp, u_int32_t x); 129int mb_put_int64be(struct mbchain *mbp, int64_t x); 130int mb_put_int64le(struct mbchain *mbp, int64_t x); 131int mb_put_mem(struct mbchain *mbp, c_caddr_t source, int size, int type); 132int mb_put_mbuf(struct mbchain *mbp, struct mbuf *m); 133int mb_put_uio(struct mbchain *mbp, struct uio *uiop, int size); 134 135int md_init(struct mdchain *mdp); 136void md_initm(struct mdchain *mbp, struct mbuf *m); 137void md_done(struct mdchain *mdp); 138void md_append_record(struct mdchain *mdp, struct mbuf *top); 139int md_next_record(struct mdchain *mdp); 140int md_get_uint8(struct mdchain *mdp, u_int8_t *x); 141int md_get_uint16(struct mdchain *mdp, u_int16_t *x); 142int md_get_uint16le(struct mdchain *mdp, u_int16_t *x); 143int md_get_uint16be(struct mdchain *mdp, u_int16_t *x); 144int md_get_uint32(struct mdchain *mdp, u_int32_t *x); 145int md_get_uint32be(struct mdchain *mdp, u_int32_t *x); 146int md_get_uint32le(struct mdchain *mdp, u_int32_t *x); 147int md_get_int64(struct mdchain *mdp, int64_t *x); 148int md_get_int64be(struct mdchain *mdp, int64_t *x); 149int md_get_int64le(struct mdchain *mdp, int64_t *x); 150int md_get_mem(struct mdchain *mdp, caddr_t target, int size, int type); 151int md_get_mbuf(struct mdchain *mdp, int size, struct mbuf **m); 152int md_get_uio(struct mdchain *mdp, struct uio *uiop, int size); 153 154#endif /* ifdef _KERNEL */ 155 156#endif /* !_SYS_MCHAIN_H_ */ 157