ISBLANK(3) AerieBSD 1.0 Refernce Manual ISBLANK(3)

NAME

isblank — blank-space character test

SYNOPSIS

#include <ctype.h>

int isblank(int c);

DESCRIPTION

The isblank(); function tests for the standard blank-space characters. The standard blank-space characters are the following:

‘\0’
Space character.
\et
Horizontal tab.

In the C locale, isblank(); returns true only for the standard blank-space characters.

RETURN VALUES

The isblank(); macro returns zero if the character tests false or non-zero if the character tests true.

SEE ALSO

isalnum(3), isalpha(3), isascii(3), iscntrl(3), isdigit(3), isgraph(3), islower(3), isprint(3), ispunct(3), isspace(3), isupper(3), isxdigit(3), stdio(3), toascii(3), tolower(3), toupper(3), ascii(7)

CAVEATS

The argument to isblank(); must be EOF or representable as an unsigned char; otherwise, the result is undefined.

AerieBSD 1.0 Reference Manual August 26 2008 ISBLANK(3)