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1 /* mod_ntlm file: $Id: byteorder.h,v 1.3 2003/02/21 01:55:14 casz Exp $ */
2
3 #ifndef BYTEORDER_H
4 #define BYTEORDER_H
5
6 /*
7 * Unix SMB/Netbios implementation. Version 1.9. SMB Byte handling
8 * Copyright (C) Andrew Tridgell 1992-1995 This program is free software;
9 * you can redistribute it and/or modify it under the terms of the GNU
10 * General Public License as published by the Free Software Foundation;
11 * either version 2 of the License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
15 * Public License for more details. You should have received a copy of the
16 * GNU General Public License along with this program; if not, write to the
17 * Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
18
19 /*
20 * This file implements macros for machine independent short and int
21 * manipulation */
22
23 #undef CAREFUL_ALIGNMENT
24
25 /* we know that the 386 can handle misalignment and has the "right"
26 * byteorder */
27 #ifdef __i386__
28 #define CAREFUL_ALIGNMENT 0
29 #endif
30
31 #ifndef CAREFUL_ALIGNMENT
32 #define CAREFUL_ALIGNMENT 1
33 #endif
34
35 #define CVAL(buf,pos) (((unsigned char *)(buf))[pos])
36 #define PVAL(buf,pos) ((unsigned)CVAL(buf,pos))
37 #define SCVAL(buf,pos,val) (CVAL(buf,pos) = (val))
38
39 #if CAREFUL_ALIGNMENT
40 #define SVAL(buf,pos) (PVAL(buf,pos)|PVAL(buf,(pos)+1)<<8)
41 #define IVAL(buf,pos) (SVAL(buf,pos)|SVAL(buf,(pos)+2)<<16)
42 #define SSVALX(buf,pos,val) (CVAL(buf,pos)=(val)&0xFF,CVAL(buf,pos+1)=(val)>>8)
43 #define SIVALX(buf,pos,val) (SSVALX(buf,pos,val&0xFFFF),SSVALX(buf,pos+2,val>>16))
44 #define SVALS(buf,pos) ((int16)SVAL(buf,pos))
45 #define IVALS(buf,pos) ((int32)IVAL(buf,pos))
46 #define SSVAL(buf,pos,val) SSVALX((buf),(pos),((uint16)(val)))
47 #define SIVAL(buf,pos,val) SIVALX((buf),(pos),((uint32)(val)))
48 #define SSVALS(buf,pos,val) SSVALX((buf),(pos),((int16)(val)))
49 #define SIVALS(buf,pos,val) SIVALX((buf),(pos),((int32)(val)))
50 #else
51 /* this handles things for architectures like the 386 that can handle
52 * alignment errors */
53 /*
54 * WARNING: This section is dependent on the length of int16 and int32
55 * being correct */
56 #define SVAL(buf,pos) (*(uint16 *)((char *)(buf) + (pos)))
57 #define IVAL(buf,pos) (*(uint32 *)((char *)(buf) + (pos)))
58 #define SVALS(buf,pos) (*(int16 *)((char *)(buf) + (pos)))
59 #define IVALS(buf,pos) (*(int32 *)((char *)(buf) + (pos)))
60 #define SSVAL(buf,pos,val) SVAL(buf,pos)=((uint16)(val))
61 #define SIVAL(buf,pos,val) IVAL(buf,pos)=((uint32)(val))
62 #define SSVALS(buf,pos,val) SVALS(buf,pos)=((int16)(val))
63 #define SIVALS(buf,pos,val) IVALS(buf,pos)=((int32)(val))
64 #endif
65
66 /* now the reverse routines - these are used in nmb packets (mostly) */
67 #define SREV(x) ((((x)&0xFF)<<8) | (((x)>>8)&0xFF))
68 #define IREV(x) ((SREV(x)<<16) | (SREV((x)>>16)))
69
70 #define RSVAL(buf,pos) SREV(SVAL(buf,pos))
71 #define RIVAL(buf,pos) IREV(IVAL(buf,pos))
72 #define RSSVAL(buf,pos,val) SSVAL(buf,pos,SREV(val))
73 #define RSIVAL(buf,pos,val) SIVAL(buf,pos,IREV(val))
74
75 #endif
76