version 1.1.1.1, 2012/02/17 15:09:30
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version 1.1.1.4, 2021/03/17 00:32:36
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* Simple byteorder handling. |
* Simple byteorder handling. |
* |
* |
* Copyright (C) 1992-1995 Andrew Tridgell |
* Copyright (C) 1992-1995 Andrew Tridgell |
* Copyright (C) 2007-2008 Wayne Davison | * Copyright (C) 2007-2020 Wayne Davison |
* |
* |
* This program is free software; you can redistribute it and/or modify |
* 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 |
* it under the terms of the GNU General Public License as published by |
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*/ |
*/ |
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#undef CAREFUL_ALIGNMENT |
#undef CAREFUL_ALIGNMENT |
#undef AVOID_BYTEORDER_INLINE |
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/* We know that the x86 can handle misalignment and has the same |
/* We know that the x86 can handle misalignment and has the same |
* byte order (LSB-first) as the 32-bit numbers we transmit. */ |
* byte order (LSB-first) as the 32-bit numbers we transmit. */ |
#ifdef __i386__ | #if defined __i386__ || defined __i486__ || defined __i586__ || defined __i686__ || __amd64 |
#define CAREFUL_ALIGNMENT 0 |
#define CAREFUL_ALIGNMENT 0 |
#endif |
#endif |
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#if CAREFUL_ALIGNMENT |
#if CAREFUL_ALIGNMENT |
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#define PVAL(buf,pos) (UVAL(buf,pos)|UVAL(buf,(pos)+1)<<8) | static inline uint32 |
#define IVAL(buf,pos) (PVAL(buf,pos)|PVAL(buf,(pos)+2)<<16) | IVALu(const uchar *buf, int pos) |
#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)) | return UVAL(buf, pos) |
#define SIVAL(buf,pos,val) SIVALX((buf),(pos),((uint32)(val))) | | UVAL(buf, pos + 1) << 8 |
| | UVAL(buf, pos + 2) << 16 |
| | UVAL(buf, pos + 3) << 24; |
| } |
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#define IVALu(buf,pos) IVAL(buf,pos) | static inline void |
#define SIVALu(buf,pos,val) SIVAL(buf,pos,val) | SIVALu(uchar *buf, int pos, uint32 val) |
| { |
| CVAL(buf, pos) = val; |
| CVAL(buf, pos + 1) = val >> 8; |
| CVAL(buf, pos + 2) = val >> 16; |
| CVAL(buf, pos + 3) = val >> 24; |
| } |
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static inline int64 |
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IVAL64(const char *buf, int pos) |
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{ |
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return IVALu((uchar*)buf, pos) | (int64)IVALu((uchar*)buf, pos + 4) << 32; |
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} |
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static inline void |
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SIVAL64(char *buf, int pos, int64 val) |
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{ |
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SIVALu((uchar*)buf, pos, val); |
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SIVALu((uchar*)buf, pos + 4, val >> 32); |
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} |
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#else /* !CAREFUL_ALIGNMENT */ |
#else /* !CAREFUL_ALIGNMENT */ |
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/* This handles things for architectures like the 386 that can handle alignment errors. |
/* This handles things for architectures like the 386 that can handle alignment errors. |
* WARNING: This section is dependent on the length of an int32 (and thus a uint32) |
* WARNING: This section is dependent on the length of an int32 (and thus a uint32) |
* being correct (4 bytes)! Set CAREFUL_ALIGNMENT if it is not. */ |
* being correct (4 bytes)! Set CAREFUL_ALIGNMENT if it is not. */ |
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# ifdef AVOID_BYTEORDER_INLINE |
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#define IVAL(buf,pos) (*(uint32 *)((char *)(buf) + (pos))) |
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#define SIVAL(buf,pos,val) IVAL(buf,pos)=((uint32)(val)) |
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#define IVALu(buf,pos) IVAL(buf,pos) |
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#define SIVALu(buf,pos,val) SIVAL(buf,pos,val) |
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# else /* !AVOID_BYTEORDER_INLINE */ |
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static inline uint32 |
static inline uint32 |
IVALu(const uchar *buf, int pos) |
IVALu(const uchar *buf, int pos) |
{ |
{ |
Line 83 SIVALu(uchar *buf, int pos, uint32 val)
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Line 94 SIVALu(uchar *buf, int pos, uint32 val)
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*u.num = val; |
*u.num = val; |
} |
} |
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static inline int64 |
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IVAL64(const char *buf, int pos) |
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{ |
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union { |
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const char *b; |
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const int64 *num; |
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} u; |
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u.b = buf + pos; |
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return *u.num; |
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} |
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static inline void |
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SIVAL64(char *buf, int pos, int64 val) |
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{ |
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union { |
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char *b; |
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int64 *num; |
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} u; |
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u.b = buf + pos; |
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*u.num = val; |
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} |
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#endif /* !CAREFUL_ALIGNMENT */ |
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static inline uint32 |
static inline uint32 |
IVAL(const char *buf, int pos) |
IVAL(const char *buf, int pos) |
{ |
{ |
Line 95 SIVAL(char *buf, int pos, uint32 val)
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Line 130 SIVAL(char *buf, int pos, uint32 val)
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SIVALu((uchar*)buf, pos, val); |
SIVALu((uchar*)buf, pos, val); |
} |
} |
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# endif /* !AVOID_BYTEORDER_INLINE */ |
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#endif /* !CAREFUL_ALIGNMENT */ |
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