man.bsd.lv manual page server

Manual Page Search Parameters

ISSPACE(3) Library Functions Manual ISSPACE(3)

isspacewhite-space character test

library “libc”

#include <ctype.h>

int
isspace(int c);

The () function tests for the standard white-space characters for which isalnum(3) is false. The standard white-space characters are the following:

‘ ’
Space character.
Form feed.
New-line.
Carriage return.
Horizontal tab.
Vertical tab.

In the locale, () returns true only for the standard white-space characters.

The isspace() function returns zero if the character tests false and returns non-zero if the character tests true.

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

The isspace() function conforms to ANSI X3.159-1989 (“ANSI C89”).

The argument to isspace() must be EOF or representable as an unsigned char; otherwise, the behavior is undefined. See the CAVEATS section of ctype(3) for more details.

April 17, 2008 NetBSD-9.2