mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-08 12:37:37 +00:00
106 lines
3.9 KiB
C
106 lines
3.9 KiB
C
/*-
|
|
* See the file LICENSE for redistribution information.
|
|
*
|
|
* Copyright (c) 1996, 1997, 1998
|
|
* Sleepycat Software. All rights reserved.
|
|
*/
|
|
/*
|
|
* Copyright (c) 1990, 1993, 1994
|
|
* 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:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. 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.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. 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 REGENTS 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 REGENTS 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.
|
|
*
|
|
* @(#)db_swap.h 10.5 (Sleepycat) 4/10/98
|
|
*/
|
|
|
|
#ifndef _DB_SWAP_H_
|
|
#define _DB_SWAP_H_
|
|
|
|
/*
|
|
* Little endian <==> big endian 32-bit swap macros.
|
|
* M_32_SWAP swap a memory location
|
|
* P_32_COPY copy potentially unaligned 4 byte quantities
|
|
* P_32_SWAP swap a referenced memory location
|
|
*/
|
|
#define M_32_SWAP(a) { \
|
|
u_int32_t _tmp; \
|
|
_tmp = a; \
|
|
((u_int8_t *)&a)[0] = ((u_int8_t *)&_tmp)[3]; \
|
|
((u_int8_t *)&a)[1] = ((u_int8_t *)&_tmp)[2]; \
|
|
((u_int8_t *)&a)[2] = ((u_int8_t *)&_tmp)[1]; \
|
|
((u_int8_t *)&a)[3] = ((u_int8_t *)&_tmp)[0]; \
|
|
}
|
|
#define P_32_COPY(a, b) { \
|
|
((u_int8_t *)b)[0] = ((u_int8_t *)a)[0]; \
|
|
((u_int8_t *)b)[1] = ((u_int8_t *)a)[1]; \
|
|
((u_int8_t *)b)[2] = ((u_int8_t *)a)[2]; \
|
|
((u_int8_t *)b)[3] = ((u_int8_t *)a)[3]; \
|
|
}
|
|
#define P_32_SWAP(a) { \
|
|
u_int32_t _tmp; \
|
|
P_32_COPY(a, &_tmp); \
|
|
((u_int8_t *)a)[0] = ((u_int8_t *)&_tmp)[3]; \
|
|
((u_int8_t *)a)[1] = ((u_int8_t *)&_tmp)[2]; \
|
|
((u_int8_t *)a)[2] = ((u_int8_t *)&_tmp)[1]; \
|
|
((u_int8_t *)a)[3] = ((u_int8_t *)&_tmp)[0]; \
|
|
}
|
|
|
|
/*
|
|
* Little endian <==> big endian 16-bit swap macros.
|
|
* M_16_SWAP swap a memory location
|
|
* P_16_COPY copy potentially unaligned 2 byte quantities
|
|
* P_16_SWAP swap a referenced memory location
|
|
*/
|
|
#define M_16_SWAP(a) { \
|
|
u_int16_t _tmp; \
|
|
_tmp = (u_int16_t)a; \
|
|
((u_int8_t *)&a)[0] = ((u_int8_t *)&_tmp)[1]; \
|
|
((u_int8_t *)&a)[1] = ((u_int8_t *)&_tmp)[0]; \
|
|
}
|
|
#define P_16_COPY(a, b) { \
|
|
((u_int8_t *)b)[0] = ((u_int8_t *)a)[0]; \
|
|
((u_int8_t *)b)[1] = ((u_int8_t *)a)[1]; \
|
|
}
|
|
#define P_16_SWAP(a) { \
|
|
u_int16_t _tmp; \
|
|
P_16_COPY(a, &_tmp); \
|
|
((u_int8_t *)a)[0] = ((u_int8_t *)&_tmp)[1]; \
|
|
((u_int8_t *)a)[1] = ((u_int8_t *)&_tmp)[0]; \
|
|
}
|
|
|
|
#define SWAP32(p) { \
|
|
P_32_SWAP(p); \
|
|
(p) += sizeof(u_int32_t); \
|
|
}
|
|
#define SWAP16(p) { \
|
|
P_16_SWAP(p); \
|
|
(p) += sizeof(u_int16_t); \
|
|
}
|
|
#endif /* !_DB_SWAP_H_ */
|