1*7c478bd9Sstevel@tonic-gate /*- 2*7c478bd9Sstevel@tonic-gate * See the file LICENSE for redistribution information. 3*7c478bd9Sstevel@tonic-gate * 4*7c478bd9Sstevel@tonic-gate * Copyright (c) 1996, 1997, 1998 5*7c478bd9Sstevel@tonic-gate * Sleepycat Software. All rights reserved. 6*7c478bd9Sstevel@tonic-gate */ 7*7c478bd9Sstevel@tonic-gate /* 8*7c478bd9Sstevel@tonic-gate * Copyright (c) 1990, 1993, 1994 9*7c478bd9Sstevel@tonic-gate * The Regents of the University of California. All rights reserved. 10*7c478bd9Sstevel@tonic-gate * 11*7c478bd9Sstevel@tonic-gate * Redistribution and use in source and binary forms, with or without 12*7c478bd9Sstevel@tonic-gate * modification, are permitted provided that the following conditions 13*7c478bd9Sstevel@tonic-gate * are met: 14*7c478bd9Sstevel@tonic-gate * 1. Redistributions of source code must retain the above copyright 15*7c478bd9Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer. 16*7c478bd9Sstevel@tonic-gate * 2. Redistributions in binary form must reproduce the above copyright 17*7c478bd9Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer in the 18*7c478bd9Sstevel@tonic-gate * documentation and/or other materials provided with the distribution. 19*7c478bd9Sstevel@tonic-gate * 3. All advertising materials mentioning features or use of this software 20*7c478bd9Sstevel@tonic-gate * must display the following acknowledgement: 21*7c478bd9Sstevel@tonic-gate * This product includes software developed by the University of 22*7c478bd9Sstevel@tonic-gate * California, Berkeley and its contributors. 23*7c478bd9Sstevel@tonic-gate * 4. Neither the name of the University nor the names of its contributors 24*7c478bd9Sstevel@tonic-gate * may be used to endorse or promote products derived from this software 25*7c478bd9Sstevel@tonic-gate * without specific prior written permission. 26*7c478bd9Sstevel@tonic-gate * 27*7c478bd9Sstevel@tonic-gate * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28*7c478bd9Sstevel@tonic-gate * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29*7c478bd9Sstevel@tonic-gate * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30*7c478bd9Sstevel@tonic-gate * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31*7c478bd9Sstevel@tonic-gate * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32*7c478bd9Sstevel@tonic-gate * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33*7c478bd9Sstevel@tonic-gate * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34*7c478bd9Sstevel@tonic-gate * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35*7c478bd9Sstevel@tonic-gate * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36*7c478bd9Sstevel@tonic-gate * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37*7c478bd9Sstevel@tonic-gate * SUCH DAMAGE. 38*7c478bd9Sstevel@tonic-gate * 39*7c478bd9Sstevel@tonic-gate * @(#)db_swap.h 10.5 (Sleepycat) 4/10/98 40*7c478bd9Sstevel@tonic-gate */ 41*7c478bd9Sstevel@tonic-gate 42*7c478bd9Sstevel@tonic-gate #ifndef _DB_SWAP_H_ 43*7c478bd9Sstevel@tonic-gate #define _DB_SWAP_H_ 44*7c478bd9Sstevel@tonic-gate 45*7c478bd9Sstevel@tonic-gate /* 46*7c478bd9Sstevel@tonic-gate * Little endian <==> big endian 32-bit swap macros. 47*7c478bd9Sstevel@tonic-gate * M_32_SWAP swap a memory location 48*7c478bd9Sstevel@tonic-gate * P_32_COPY copy potentially unaligned 4 byte quantities 49*7c478bd9Sstevel@tonic-gate * P_32_SWAP swap a referenced memory location 50*7c478bd9Sstevel@tonic-gate */ 51*7c478bd9Sstevel@tonic-gate #define M_32_SWAP(a) { \ 52*7c478bd9Sstevel@tonic-gate u_int32_t _tmp; \ 53*7c478bd9Sstevel@tonic-gate _tmp = a; \ 54*7c478bd9Sstevel@tonic-gate ((u_int8_t *)&a)[0] = ((u_int8_t *)&_tmp)[3]; \ 55*7c478bd9Sstevel@tonic-gate ((u_int8_t *)&a)[1] = ((u_int8_t *)&_tmp)[2]; \ 56*7c478bd9Sstevel@tonic-gate ((u_int8_t *)&a)[2] = ((u_int8_t *)&_tmp)[1]; \ 57*7c478bd9Sstevel@tonic-gate ((u_int8_t *)&a)[3] = ((u_int8_t *)&_tmp)[0]; \ 58*7c478bd9Sstevel@tonic-gate } 59*7c478bd9Sstevel@tonic-gate #define P_32_COPY(a, b) { \ 60*7c478bd9Sstevel@tonic-gate ((u_int8_t *)b)[0] = ((u_int8_t *)a)[0]; \ 61*7c478bd9Sstevel@tonic-gate ((u_int8_t *)b)[1] = ((u_int8_t *)a)[1]; \ 62*7c478bd9Sstevel@tonic-gate ((u_int8_t *)b)[2] = ((u_int8_t *)a)[2]; \ 63*7c478bd9Sstevel@tonic-gate ((u_int8_t *)b)[3] = ((u_int8_t *)a)[3]; \ 64*7c478bd9Sstevel@tonic-gate } 65*7c478bd9Sstevel@tonic-gate #define P_32_SWAP(a) { \ 66*7c478bd9Sstevel@tonic-gate u_int32_t _tmp; \ 67*7c478bd9Sstevel@tonic-gate P_32_COPY(a, &_tmp); \ 68*7c478bd9Sstevel@tonic-gate ((u_int8_t *)a)[0] = ((u_int8_t *)&_tmp)[3]; \ 69*7c478bd9Sstevel@tonic-gate ((u_int8_t *)a)[1] = ((u_int8_t *)&_tmp)[2]; \ 70*7c478bd9Sstevel@tonic-gate ((u_int8_t *)a)[2] = ((u_int8_t *)&_tmp)[1]; \ 71*7c478bd9Sstevel@tonic-gate ((u_int8_t *)a)[3] = ((u_int8_t *)&_tmp)[0]; \ 72*7c478bd9Sstevel@tonic-gate } 73*7c478bd9Sstevel@tonic-gate 74*7c478bd9Sstevel@tonic-gate /* 75*7c478bd9Sstevel@tonic-gate * Little endian <==> big endian 16-bit swap macros. 76*7c478bd9Sstevel@tonic-gate * M_16_SWAP swap a memory location 77*7c478bd9Sstevel@tonic-gate * P_16_COPY copy potentially unaligned 2 byte quantities 78*7c478bd9Sstevel@tonic-gate * P_16_SWAP swap a referenced memory location 79*7c478bd9Sstevel@tonic-gate */ 80*7c478bd9Sstevel@tonic-gate #define M_16_SWAP(a) { \ 81*7c478bd9Sstevel@tonic-gate u_int16_t _tmp; \ 82*7c478bd9Sstevel@tonic-gate _tmp = (u_int16_t)a; \ 83*7c478bd9Sstevel@tonic-gate ((u_int8_t *)&a)[0] = ((u_int8_t *)&_tmp)[1]; \ 84*7c478bd9Sstevel@tonic-gate ((u_int8_t *)&a)[1] = ((u_int8_t *)&_tmp)[0]; \ 85*7c478bd9Sstevel@tonic-gate } 86*7c478bd9Sstevel@tonic-gate #define P_16_COPY(a, b) { \ 87*7c478bd9Sstevel@tonic-gate ((u_int8_t *)b)[0] = ((u_int8_t *)a)[0]; \ 88*7c478bd9Sstevel@tonic-gate ((u_int8_t *)b)[1] = ((u_int8_t *)a)[1]; \ 89*7c478bd9Sstevel@tonic-gate } 90*7c478bd9Sstevel@tonic-gate #define P_16_SWAP(a) { \ 91*7c478bd9Sstevel@tonic-gate u_int16_t _tmp; \ 92*7c478bd9Sstevel@tonic-gate P_16_COPY(a, &_tmp); \ 93*7c478bd9Sstevel@tonic-gate ((u_int8_t *)a)[0] = ((u_int8_t *)&_tmp)[1]; \ 94*7c478bd9Sstevel@tonic-gate ((u_int8_t *)a)[1] = ((u_int8_t *)&_tmp)[0]; \ 95*7c478bd9Sstevel@tonic-gate } 96*7c478bd9Sstevel@tonic-gate 97*7c478bd9Sstevel@tonic-gate #define SWAP32(p) { \ 98*7c478bd9Sstevel@tonic-gate P_32_SWAP(p); \ 99*7c478bd9Sstevel@tonic-gate (p) += sizeof(u_int32_t); \ 100*7c478bd9Sstevel@tonic-gate } 101*7c478bd9Sstevel@tonic-gate #define SWAP16(p) { \ 102*7c478bd9Sstevel@tonic-gate P_16_SWAP(p); \ 103*7c478bd9Sstevel@tonic-gate (p) += sizeof(u_int16_t); \ 104*7c478bd9Sstevel@tonic-gate } 105*7c478bd9Sstevel@tonic-gate #endif /* !_DB_SWAP_H_ */ 106