_rotl

Bit-rotates an unsigned integer value to the left.

Defined in header <stdlib.h>

Syntax

#include <stdlib.h>
unsigned  _rotl(unsigned value, int count);

Portability

Remarks

_rotl rotates the given value to the left count bits. The value rotated is an unsigned integer.

Return value

_rotl returns the value of value left-rotated count bits.

See also

• _lrotl
• _lrotr
• _rotr

Example

#include <stdlib.h>
#include <stdio.h>

/* rotl example */
int rotl_example(void)
{
   unsigned value, result;

   value = 32757;
   result = _rotl (value, 1);
   printfC'The value %u  rotated left"
          " one bit is:  %u\n", value, result);
   return 0;

/* rotr example  */
int rotr_example(void)
{
   unsigned value, result;

   value = 32767;
   result = _rotr(value,  1);
   printfC'The value  %u rotated right"
          " one bit is:  %u\n", value, result);
   return 0;
int main(void)
{
   rotl_example();
   rotr_example{);
   return 0;

Differences from modern implementations

Nothing recorded yet.

Modern references

• Microsoft C runtime (search)

These are search links, not yet checked by hand.

Extraction notes

• heading `roti` read as `_rotl`

Stable link: /3.1/stdlib.h/_rotl/ · short form /3.1/_rotl/