NAME    [Toc]    [Back]

     isspace - whitespace character test

SYNOPSIS    [Toc]    [Back]

     #include <ctype.h>

     int
     isspace(int c);

DESCRIPTION    [Toc]    [Back]

     The isspace() function tests  for  the  standard  whitespace
characters for
     which  isalnum(3) is false.  The standard whitespace characters are the
     following:

           ` '    Space character.
               Form feed.
               NCarriage return.

                Horizontal tab.
               And vertical tab.

     In the C locale, isspace() returns true only for  the  standard whitespace
     characters.

RETURN VALUES    [Toc]    [Back]

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

SEE ALSO    [Toc]    [Back]

     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)

STANDARDS    [Toc]    [Back]

     The isspace() function conforms to ANSI X3.159-1989  (``ANSI
C'').

CAVEATS    [Toc]    [Back]

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

OpenBSD     3.6                           July      31,      1991