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dc77e7d379
Clang-CL does not support #pragma function like CL. The alternative to this approach is to disable all intrinsics for this single source file, but that is not trivial to do, as it can only be done by removing a compiler switch, which we have no CMake support for. Therefore this solution is simpler and as good.
80 lines
1.7 KiB
C
80 lines
1.7 KiB
C
/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS system libraries
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* FILE: lib/sdk/crt/stdlib/rot.c
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* PURPOSE: Performs a bitwise rotation
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* PROGRAMER: Ariadne
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* UPDATE HISTORY:
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* 03/04/99: Created
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*/
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#include <stdlib.h>
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#ifdef __clang__
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#define _rotl __function_rotl
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#define _rotr __function_rotr
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#define _lrotl __function_lrotl
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#define _lrotr __function_lrotr
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#elif defined(_MSC_VER)
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#pragma function(_rotr, _rotl, _rotr, _lrotl, _lrotr)
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#endif
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unsigned int _rotr( unsigned int value, int shift );
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unsigned long _lrotr(unsigned long value, int shift);
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/*
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* @implemented
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*/
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unsigned int _rotl( unsigned int value, int shift )
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{
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int max_bits = sizeof(unsigned int)<<3;
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if ( shift < 0 )
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return _rotr(value,-shift);
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if ( shift > max_bits )
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shift = shift % max_bits;
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return (value << shift) | (value >> (max_bits-shift));
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}
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/*
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* @implemented
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*/
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unsigned int _rotr( unsigned int value, int shift )
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{
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int max_bits = sizeof(unsigned int)<<3;
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if ( shift < 0 )
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return _rotl(value,-shift);
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if ( shift > max_bits )
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shift = shift % max_bits;
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return (value >> shift) | (value << (max_bits-shift));
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}
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/*
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* @implemented
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*/
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unsigned long _lrotl( unsigned long value, int shift )
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{
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int max_bits = sizeof(unsigned long)<<3;
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if ( shift < 0 )
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return _lrotr(value,-shift);
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if ( shift > max_bits )
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shift = shift % max_bits;
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return (value << shift) | (value >> (max_bits-shift));
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}
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/*
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* @implemented
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*/
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unsigned long _lrotr( unsigned long value, int shift )
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{
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int max_bits = sizeof(unsigned long)<<3;
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if ( shift < 0 )
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return _lrotl(value,-shift);
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if ( shift > max_bits )
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shift = shift % max_bits;
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return (value >> shift) | (value << (max_bits-shift));
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}
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