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/*
* Simple byteorder handling.
*
* Copyright (C) 1992-1995 Andrew Tridgell
* Copyright (C) 2007 Wayne Davison
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
*/
#undef CAREFUL_ALIGNMENT
/* We know that the x86 can handle misalignment and has the same
* byte order (LSB-first) as the 32-bit numbers we transmit. */
#ifdef __i386__
#define CAREFUL_ALIGNMENT 0
#endif
#ifndef CAREFUL_ALIGNMENT
#define CAREFUL_ALIGNMENT 1
#endif
#define CVAL(buf,pos) (((unsigned char *)(buf))[pos])
#define UVAL(buf,pos) ((uint32)CVAL(buf,pos))
#define SCVAL(buf,pos,val) (CVAL(buf,pos) = (val))
/* Our 64-bit numbers are sent in MSB-first order so that we can use
* the highest bits to indicate the number of bytes sent. */
#define NVAL2(b,m) ((UVAL(b,0)&~(m))<<8|UVAL(b,1))
#define NVAL3(b,m) (NVAL2(b,m)<<8|UVAL(b,2))
#define NVAL4(b,m) (NVAL3(b,m)<<8|UVAL(b,3))
#define NVAL5(b,m) ((int64)NVAL4(b,m)<<8|UVAL(b,4))
#define NVAL6(b,m) (NVAL5(b,m)<<8|UVAL(b,5))
#define NVAL7(b,m) (NVAL6(b,m)<<8|UVAL(b,6))
#define NVAL8(b,m) (NVAL7(b,m)<<8|UVAL(b,7))
#if CAREFUL_ALIGNMENT
#define PVAL(buf,pos) (UVAL(buf,pos)|UVAL(buf,(pos)+1)<<8)
#define IVAL(buf,pos) (PVAL(buf,pos)|PVAL(buf,(pos)+2)<<16)
#define SSVALX(buf,pos,val) (CVAL(buf,pos)=(val)&0xFF,CVAL(buf,pos+1)=(val)>>8)
#define SIVALX(buf,pos,val) (SSVALX(buf,pos,val&0xFFFF),SSVALX(buf,pos+2,val>>16))
#define SIVAL(buf,pos,val) SIVALX((buf),(pos),((uint32)(val)))
#else
/* this handles things for architectures like the 386 that can handle
alignment errors */
/*
WARNING: This section is dependent on the length of int32
being correct. set CAREFUL_ALIGNMENT if it is not.
*/
#define IVAL(buf,pos) (*(uint32 *)((char *)(buf) + (pos)))
#define SIVAL(buf,pos,val) IVAL(buf,pos)=((uint32)(val))
#endif
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