isspace.c File Reference

#include <ctype.h>

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Functions
int	isspace (int c)
	Checks if the given character is a whitespace character. More...

Function Documentation

isspace()

int isspace

(

int

ch

)

Checks if the given character is a whitespace character.

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

• space (0x20)
• feed (0x0c)
• line feed (0x0a)
• carriage return (0x0d)
• horizontal tab (0x09)
• vertical tab (0x0b)

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 whitespace character, zero otherwise.

Definition at line 5 of file isspace.c.

{
    return c == ' ' || (unsigned)c - '\t' < 5;
}

Referenced by atol(), atoll(), strtol(), strtoll(), strtoul(), and strtoull().

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