_lrotl, _lrotr

Remonter à Stdlib.h - Index

Header File

stdlib.h

Category

Math Routines

Prototype

unsigned long _lrotl(unsigned long val, int count);

unsigned long _lrotr(unsigned long val, int count);

Description

Rotates an unsigned long integer value to the left or right.

_Irotlrotates the given val to the left count bits. _lrotr rotates the given val to the right count bits.

Return Value

The functions return the rotated integer:

• _lrotl returns the value of val left-rotated count bits.
• _lrotr returns the value of val right-rotated count bits.

Example

#include <stdlib.h>
#include <stdio.h>
/* function prototypes */
int lrotl_example(void);
int lrotr_example(void);
/* lrotl example */
int lrotl_example(void)
{
   unsigned long result;
   unsigned long value = 100;
   result = _lrotl(value,1);
   printf("The value %lu rotated left one bit is: %lu\n", value, result);
   return 0;
}
/* lrotr example */
int lrotr_example(void)
{
   unsigned long result;
   unsigned long value = 100;
   result = _lrotr(value,1);
   printf("The value %lu rotated right one bit is: %lu\n", value, result);
   return 0;
}
int main(void)
{
   lrotl_example();
   lrotr_example();
   return 0;
}

Portability

POSIX	Win32	ANSI C	ANSI C++
	+