iscntrl.c File Reference

#include <ctype.h>

Include dependency graph for iscntrl.c:

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Functions
int	iscntrl (int c)
	Checks if the given character is a control character. More...

Function Documentation

iscntrl()

int iscntrl

(

int

ch

)

Checks if the given character is a control character.

Checks if the given character is a control character. The following are examples of control character:

• codes (0x00-0x1F) and (0x7F)

The behavior is undefined if the value of ch is not representable as unsigned char and is not equal to EOF.

Parameters

ch	The character to classify

Returns

Non-zero value if the character is a control character, zero otherwise.

Definition at line 5 of file iscntrl.c.

{
    return (unsigned)c < 0x20 || c == 0x7f;
}