/*  * Unix SMB/Netbios implementation. * Version 1.9. * SMB Byte handling * Copyright (C) Andrew Tridgell 1992-1995 *  * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. *  * 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., 675 Mass Ave, Cambridge, MA 02139, USA. *//* * This file implements macros for machine independent short and  * int manipulation */#undef CAREFUL_ALIGNMENT/* we know that the 386 can handle misalignment and has the "right"  * byteorder */#ifdef __i386__#define CAREFUL_ALIGNMENT 0#endif#ifndef CAREFUL_ALIGNMENT#define CAREFUL_ALIGNMENT 1#endif#define CVAL(buf,pos) (((unsigned char *)(buf))[pos])#define PVAL(buf,pos) ((unsigned)CVAL(buf,pos))#define SCVAL(buf,pos,val) (CVAL(buf,pos) = (val))#if CAREFUL_ALIGNMENT#define SVAL(buf,pos) (PVAL(buf,pos)|PVAL(buf,(pos)+1)<<8)#define IVAL(buf,pos) (SVAL(buf,pos)|SVAL(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 SVALS(buf,pos) ((int16)SVAL(buf,pos))#define IVALS(buf,pos) ((int32)IVAL(buf,pos))#define SSVAL(buf,pos,val) SSVALX((buf),(pos),((uint16)(val)))#define SIVAL(buf,pos,val) SIVALX((buf),(pos),((uint32)(val)))#define SSVALS(buf,pos,val) SSVALX((buf),(pos),((int16)(val)))#define SIVALS(buf,pos,val) SIVALX((buf),(pos),((int32)(val)))#else/* this handles things for architectures like the 386 that can handle * alignment errors *//* * WARNING: This section is dependent on the length of int16 and int32 * being correct  */#define SVAL(buf,pos) (*(uint16 *)((char *)(buf) + (pos)))#define IVAL(buf,pos) (*(uint32 *)((char *)(buf) + (pos)))#define SVALS(buf,pos) (*(int16 *)((char *)(buf) + (pos)))#define IVALS(buf,pos) (*(int32 *)((char *)(buf) + (pos)))#define SSVAL(buf,pos,val) SVAL(buf,pos)=((uint16)(val))#define SIVAL(buf,pos,val) IVAL(buf,pos)=((uint32)(val))#define SSVALS(buf,pos,val) SVALS(buf,pos)=((int16)(val))#define SIVALS(buf,pos,val) IVALS(buf,pos)=((int32)(val))#endif/* now the reverse routines - these are used in nmb packets (mostly) */#define SREV(x) ((((x)&0xFF)<<8) | (((x)>>8)&0xFF))#define IREV(x) ((SREV(x)<<16) | (SREV((x)>>16)))#define RSVAL(buf,pos) SREV(SVAL(buf,pos))#define RIVAL(buf,pos) IREV(IVAL(buf,pos))#define RSSVAL(buf,pos,val) SSVAL(buf,pos,SREV(val))#define RSIVAL(buf,pos,val) SIVAL(buf,pos,IREV(val))