Header File 

stdlib.h 

Category 

Math Routines 

Prototype 

unsigned char _crotl(unsigned char val, int count); 

unsigned char _crotr(unsigned char val, int count); 

Description 

Rotates an unsigned char left or right. 

_crotl rotates the given val to the left count bits. _crotr rotates the given val to the right count bits. 

The argument val is an unsigned char, or its equivalent in decimal or hexadecimal form. 

Return Value

• The functions return the rotated byte:
• _crotl returns the value of val left-rotated count bits.
• _crotr returns the value of val right-rotated count bits.