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endianness.h
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1 #ifndef _ENDIANNESS_H
2 #define _ENDIANNESS_H
3 double DONTUSE__NXSwapBigDoubleToLittleEndian( double x );
4 
5 #include "config.h"
6 
7 #if defined (__HAIKU__) //For unknow reasons, Haiku don't fit into any case below
8  #include <endian.h>
9 #elif defined (__APPLE__) || defined (MACOSX) || defined (BSD) || defined (__FreeBSD__)
10  #include <machine/endian.h>
11 #else
12 
13  #if defined (IRIX)
14  # include <sys/endian.h>
15 
16  #elif !defined (_WIN32) && !defined (__CYGWIN__) && !defined (SOLARIS)
17  # include <endian.h>
18  #else
19  # define __BIG_ENDIAN 1
20  # define __LITTLE_ENDIAN 0
21  # define __BYTE_ORDER 0
22  #endif
23 #endif
24 #if defined (__APPLE__) || defined (MACOSX)
25  #include <machine/endian.h>
26  #if __BYTE_ORDER == __BIG_ENDIAN
27  # include <machine/byte_order.h>
28  # define le32_to_cpu( x ) ( NXSwapHostLongToLittle( x ) )
29  # define le16_to_cpu( x ) ( NXSwapHostShortToLittle( x ) )
30  # define le64_to_cpu( x ) ( DONTUSE__NXSwapBigDoubleToLittleEndian( x ) )
31  #else
32  # define le32_to_cpu( x ) (x)
33  # define le16_to_cpu( x ) (x)
34  # define le64_to_cpu( x ) (x)
35  #endif
36 #else
37  #if defined (IRIX) || (defined (__SVR4) && defined (__sun ) )
38  #include <sys/types.h>
39  # if BYTE_ORDER == BIG_ENDIAN /* depends on MIPSEB or MIPSEL and SGIAPI */
40  # define le32_to_cpu( x ) \
41  ( ( (x)<<24 ) \
42  |( ( (x)<<8 )&0x00FF0000 ) \
43  |( ( (uint32_t) (x)>>8 )&0x0000FF00 ) \
44  |( (uint32_t) (x)>>24 ) )
45  # define le16_to_cpu( x ) ( ( (x&0xFF)<<8 )|( (unsigned short) (x)>>8 ) )
46  # define le64_to_cpu( x ) ( DONTUSE__NXSwapBigDoubleToLittleEndian( x ) )
47  # else
48  # define le32_to_cpu( x ) (x)
49  # define le16_to_cpu( x ) (x)
50  # define le64_to_cpu( x ) (x)
51  # endif
52 
53  #elif __BYTE_ORDER == __BIG_ENDIAN && !defined (BSD) && !defined (__FreeBSD__)
54  # include <byteswap.h>
55  # define le32_to_cpu( x ) ( bswap_32( x ) )
56  # define le16_to_cpu( x ) ( bswap_16( x ) )
57  # define le64_to_cpu( x ) ( DONTUSE__NXSwapBigDoubleToLittleEndian( x ) )
58  #else
59  # define le32_to_cpu( x ) (x)
60  # define le16_to_cpu( x ) (x)
61  # define le64_to_cpu( x ) (x)
62  #endif
63 #endif
64 
65 inline float VSSwapHostFloatToLittle( float x )
66 {
67  union LILfloat
68  {
69  float f;
70  unsigned int i;
71  }
72  l;
73  l.f = x;
74  l.i = le32_to_cpu( l.i );
75  return l.f;
76 }
77 
78 inline double VSSwapHostDoubleToLittle( double x )
79 {
80  return le64_to_cpu( x );
81 }
82 
83 inline unsigned int VSSwapHostIntToLittle( unsigned int x )
84 {
85  return le32_to_cpu( x );
86 }
87 
88 inline unsigned short VSSwapHostShortToLittle( unsigned short x )
89 {
90  return le16_to_cpu( x );
91 }
92 
93 inline double DONTUSE__NXSwapBigDoubleToLittleEndian( double x )
94 {
95  union LILdubl
96  {
97  double d;
98  unsigned int i[2];
99  }
100  l;
101  l.d = x;
102  unsigned int tmp = le32_to_cpu( l.i[0] );
103  l.i[0] = le32_to_cpu( l.i[1] );
104  l.i[1] = tmp;
105  return l.d;
106 }
107 
108 #endif //_ENDIANNESS_H
109