ReactOS  0.4.15-dev-3294-ge98684e
rot.c
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1 /*
2  * COPYRIGHT: See COPYING in the top level directory
3  * PROJECT: ReactOS system libraries
4  * FILE: lib/sdk/crt/stdlib/rot.c
5  * PURPOSE: Performs a bitwise rotation
6  * PROGRAMER: Ariadne
7  * UPDATE HISTORY:
8  * 03/04/99: Created
9  */
10 
11 #include <stdlib.h>
12 
13 #ifdef __clang__
14 # define _rotl __function_rotl
15 # define _rotr __function_rotr
16 # define _lrotl __function_lrotl
17 # define _lrotr __function_lrotr
18 #elif defined(_MSC_VER)
19 # pragma function(_rotr, _rotl, _rotr, _lrotl, _lrotr)
20 #endif
21 
22 #if defined (__clang__) && !defined(_MSC_VER)
23 # ifdef _M_IX86
24 unsigned int _rotr( unsigned int value, int shift ) __asm__("__rotr");
25 unsigned long _lrotr(unsigned long value, int shift) __asm__("__lrotr");
26 unsigned int _rotl( unsigned int value, int shift ) __asm__("__rotl");
27 unsigned long _lrotl( unsigned long value, int shift ) __asm__("__lrotl");
28 # else
29 unsigned int _rotr( unsigned int value, int shift ) __asm__("_rotr");
30 unsigned long _lrotr(unsigned long value, int shift) __asm__("_lrotr");
31 unsigned int _rotl( unsigned int value, int shift ) __asm__("_rotl");
32 unsigned long _lrotl( unsigned long value, int shift ) __asm__("_lrotl");
33 # endif
34 #else
35 unsigned int _rotr( unsigned int value, int shift );
36 unsigned long _lrotr(unsigned long value, int shift);
37 unsigned int _rotl( unsigned int value, int shift );
38 unsigned long _lrotl( unsigned long value, int shift );
39 #endif
40 /*
41  * @implemented
42  */
43 unsigned int _rotl( unsigned int value, int shift )
44 {
45  int max_bits = sizeof(unsigned int)<<3;
46  if ( shift < 0 )
47  return _rotr(value,-shift);
48 
49  if ( shift > max_bits )
50  shift = shift % max_bits;
51  return (value << shift) | (value >> (max_bits-shift));
52 }
53 
54 /*
55  * @implemented
56  */
57 unsigned int _rotr( unsigned int value, int shift )
58 {
59  int max_bits = sizeof(unsigned int)<<3;
60  if ( shift < 0 )
61  return _rotl(value,-shift);
62 
63  if ( shift > max_bits )
64  shift = shift % max_bits;
65  return (value >> shift) | (value << (max_bits-shift));
66 }
67 
68 /*
69  * @implemented
70  */
71 unsigned long _lrotl( unsigned long value, int shift )
72 {
73  int max_bits = sizeof(unsigned long)<<3;
74  if ( shift < 0 )
75  return _lrotr(value,-shift);
76 
77  if ( shift > max_bits )
78  shift = shift % max_bits;
79  return (value << shift) | (value >> (max_bits-shift));
80 }
81 
82 /*
83  * @implemented
84  */
85 unsigned long _lrotr( unsigned long value, int shift )
86 {
87  int max_bits = sizeof(unsigned long)<<3;
88  if ( shift < 0 )
89  return _lrotl(value,-shift);
90 
91  if ( shift > max_bits )
92  shift = shift % max_bits;
93  return (value >> shift) | (value << (max_bits-shift));
94 }
Definition: pdh_main.c:93
#define shift
Definition: input.c:1756
unsigned int _rotl(unsigned int value, int shift)
Definition: rot.c:43
__asm__("\n\t \ NewInt3Handler:\n\t \ pushl $" STR(REASON_INT3) "\n\t \ // call debugger loop\n\t \ jmp NewInt31Handler\n\t \ ")
unsigned long _lrotl(unsigned long value, int shift)
Definition: rot.c:71
unsigned long _lrotr(unsigned long value, int shift)
Definition: rot.c:85
unsigned int _rotr(unsigned int value, int shift)
Definition: rot.c:57
#define long
Definition: qsort.c:33
unsigned int(__cdecl typeof(jpeg_read_scanlines))(struct jpeg_decompress_struct *
Definition: typeof.h:31