Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages

  
 
  

home | help
ISBLANK(3)	       FreeBSD Library Functions Manual		    ISBLANK(3)

NAME
     isblank --	space or tab character test

LIBRARY
     Standard C	Library	(libc, -lc)

SYNOPSIS
     #include <ctype.h>

     int
     isblank(int c);

     int
     isblank_l(int c, locale_t loc);

DESCRIPTION
     The isblank() function tests for a	space or tab character.	 For any
     locale, this includes the following standard characters:

     ``\t''  ``	''

     In	the "C"	locale,	a successful isblank() test is limited to these	char-
     acters only.  The value of	the argument must be representable as an
     unsigned char or the value	of EOF.

     The isblank_l() function takes an explicit	locale argument, whereas the
     isblank() function	uses the current global	or per-thread locale.

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

COMPATIBILITY
     The 4.4BSD	extension of accepting arguments outside of the	range of the
     unsigned char type	in locales with	large character	sets is	considered
     obsolete and may not be supported in future releases.  The	iswblank()
     function should be	used instead.

SEE ALSO
     ctype(3), iswblank(3), xlocale(3),	ascii(7)

STANDARDS
     The isblank() function conforms to	ISO/IEC	9899:1999 (``ISO C99'').  The
     isblank_l() function conforms to IEEE Std 1003.1-2008 (``POSIX.1'').

FreeBSD	11.2			 July 17, 2005			  FreeBSD 11.2

NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | COMPATIBILITY | SEE ALSO | STANDARDS

Want to link to this manual page? Use this URL:
<https://www.freebsd.org/cgi/man.cgi?query=isblank&sektion=3&manpath=FreeBSD+11.2-RELEASE>

home | help