1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
|
#ifndef PERL_SEEN_HV_MACRO_H_ /* compile once */
#define PERL_SEEN_HV_MACRO_H_
#if IVSIZE == 8
#define CAN64BITHASH
#endif
#ifdef CAN64BITHASH
#ifndef U64TYPE
/* This probably isn't going to work, but failing with a compiler error due to
lack of uint64_t is no worse than failing right now with an #error. */
#define U64 uint64_t
#endif
#endif
/*-----------------------------------------------------------------------------
* Endianess and util macros
*
* The following 3 macros are defined in this section. The other macros defined
* are only needed to help derive these 3.
*
* U8TO16_LE(x) Read a little endian unsigned 16-bit int
* U8TO32_LE(x) Read a little endian unsigned 32-bit int
* U8TO64_LE(x) Read a little endian unsigned 64-bit int
* ROTL32(x,r) Rotate x left by r bits
* ROTL64(x,r) Rotate x left by r bits
* ROTR32(x,r) Rotate x right by r bits
* ROTR64(x,r) Rotate x right by r bits
*/
#ifndef U8TO16_LE
#define _shifted_octet(type,ptr,idx,shift) (((type)(((const U8*)(ptr))[(idx)]))<<(shift))
#if defined(USE_UNALIGNED_PTR_DEREF) && (BYTEORDER == 0x1234 || BYTEORDER == 0x12345678)
#define U8TO16_LE(ptr) (*((const U16*)(ptr)))
#define U8TO32_LE(ptr) (*((const U32*)(ptr)))
#define U8TO64_LE(ptr) (*((const U64*)(ptr)))
#else
#define U8TO16_LE(ptr) (_shifted_octet(U16,(ptr),0, 0)|\
_shifted_octet(U16,(ptr),1, 8))
#define U8TO32_LE(ptr) (_shifted_octet(U32,(ptr),0, 0)|\
_shifted_octet(U32,(ptr),1, 8)|\
_shifted_octet(U32,(ptr),2,16)|\
_shifted_octet(U32,(ptr),3,24))
#define U8TO64_LE(ptr) (_shifted_octet(U64,(ptr),0, 0)|\
_shifted_octet(U64,(ptr),1, 8)|\
_shifted_octet(U64,(ptr),2,16)|\
_shifted_octet(U64,(ptr),3,24)|\
_shifted_octet(U64,(ptr),4,32)|\
_shifted_octet(U64,(ptr),5,40)|\
_shifted_octet(U64,(ptr),6,48)|\
_shifted_octet(U64,(ptr),7,56))
#endif
#endif
/* Find best way to ROTL32/ROTL64 */
#if defined(_MSC_VER)
#include <stdlib.h> /* Microsoft put _rotl declaration in here */
#define ROTL32(x,r) _rotl(x,r)
#define ROTR32(x,r) _rotr(x,r)
#define ROTL64(x,r) _rotl64(x,r)
#define ROTR64(x,r) _rotr64(x,r)
#else
/* gcc recognises this code and generates a rotate instruction for CPUs with one */
#define ROTL32(x,r) (((U32)(x) << (r)) | ((U32)(x) >> (32 - (r))))
#define ROTR32(x,r) (((U32)(x) << (32 - (r))) | ((U32)(x) >> (r)))
#define ROTL64(x,r) ( ( (U64)(x) << (r) ) | ( (U64)(x) >> ( 64 - (r) ) ) )
#define ROTR64(x,r) ( ( (U64)(x) << ( 64 - (r) ) ) | ( (U64)(x) >> (r) ) )
#endif
#ifdef UV_IS_QUAD
#define ROTL_UV(x,r) ROTL64(x,r)
#define ROTR_UV(x,r) ROTL64(x,r)
#else
#define ROTL_UV(x,r) ROTL32(x,r)
#define ROTR_UV(x,r) ROTR32(x,r)
#endif
#if IVSIZE == 8
#define CAN64BITHASH
#endif
#endif
|
