Commit | Line | Data |
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0f78b815 WD |
1 | /* |
2 | * Simple byteorder handling. | |
3 | * | |
4 | * Copyright (C) 1992-1995 Andrew Tridgell | |
ba2133d6 | 5 | * Copyright (C) 2007 Wayne Davison |
0f78b815 WD |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify | |
ba2133d6 WD |
8 | * it under the terms of the GNU General Public License version 2 as |
9 | * published by the Free Software Foundation. | |
0f78b815 WD |
10 | * |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
e7c67065 WD |
16 | * You should have received a copy of the GNU General Public License along |
17 | * with this program; if not, write to the Free Software Foundation, Inc., | |
18 | * 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. | |
0f78b815 | 19 | */ |
c627d613 AT |
20 | |
21 | #undef CAREFUL_ALIGNMENT | |
22 | ||
36e6594d WD |
23 | /* We know that the x86 can handle misalignment and has the same |
24 | * byte order (LSB-first) as the 32-bit numbers we transmit. */ | |
c627d613 AT |
25 | #ifdef __i386__ |
26 | #define CAREFUL_ALIGNMENT 0 | |
27 | #endif | |
28 | ||
29 | #ifndef CAREFUL_ALIGNMENT | |
30 | #define CAREFUL_ALIGNMENT 1 | |
31 | #endif | |
32 | ||
33 | #define CVAL(buf,pos) (((unsigned char *)(buf))[pos]) | |
36e6594d | 34 | #define UVAL(buf,pos) ((uint32)CVAL(buf,pos)) |
c627d613 AT |
35 | #define SCVAL(buf,pos,val) (CVAL(buf,pos) = (val)) |
36 | ||
36e6594d WD |
37 | /* Our 64-bit numbers are sent in MSB-first order so that we can use |
38 | * the highest bits to indicate the number of bytes sent. */ | |
1c3344a1 WD |
39 | #define NVAL1(b,m) (UVAL(b,0)&~(uint32)(m)) |
40 | #define NVAL2(b,m) (NVAL1(b,m)<<8|UVAL(b,1)) | |
36e6594d WD |
41 | #define NVAL3(b,m) (NVAL2(b,m)<<8|UVAL(b,2)) |
42 | #define NVAL4(b,m) (NVAL3(b,m)<<8|UVAL(b,3)) | |
43 | #define NVAL5(b,m) ((int64)NVAL4(b,m)<<8|UVAL(b,4)) | |
44 | #define NVAL6(b,m) (NVAL5(b,m)<<8|UVAL(b,5)) | |
45 | #define NVAL7(b,m) (NVAL6(b,m)<<8|UVAL(b,6)) | |
46 | #define NVAL8(b,m) (NVAL7(b,m)<<8|UVAL(b,7)) | |
c627d613 AT |
47 | |
48 | #if CAREFUL_ALIGNMENT | |
36e6594d WD |
49 | #define PVAL(buf,pos) (UVAL(buf,pos)|UVAL(buf,(pos)+1)<<8) |
50 | #define IVAL(buf,pos) (PVAL(buf,pos)|PVAL(buf,(pos)+2)<<16) | |
c627d613 AT |
51 | #define SSVALX(buf,pos,val) (CVAL(buf,pos)=(val)&0xFF,CVAL(buf,pos+1)=(val)>>8) |
52 | #define SIVALX(buf,pos,val) (SSVALX(buf,pos,val&0xFFFF),SSVALX(buf,pos+2,val>>16)) | |
53 | #define SIVAL(buf,pos,val) SIVALX((buf),(pos),((uint32)(val))) | |
54 | #else | |
55 | /* this handles things for architectures like the 386 that can handle | |
56 | alignment errors */ | |
57 | /* | |
58 | WARNING: This section is dependent on the length of int32 | |
59 | being correct. set CAREFUL_ALIGNMENT if it is not. | |
60 | */ | |
61 | #define IVAL(buf,pos) (*(uint32 *)((char *)(buf) + (pos))) | |
62 | #define SIVAL(buf,pos,val) IVAL(buf,pos)=((uint32)(val)) | |
63 | #endif |