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

FreeBSD Manual Pages

  
 
  

home | help
ISBLANK(3)		 BSD 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);

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

     ``\t''	 `` ''

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

RETURN VALUES
     The isblank() function returns zero if the	character tests	false and re-
     turns 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 ob-
     solete and	may not	be supported in	future releases.  The iswblank() func-
     tion should be used instead.

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

STANDARDS
     The isblank() function conforms to	ISO/IEC	9899:1999 ("ISO	C99").

BSD				 July 17, 2005				   BSD

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+8.0-RELEASE>

home | help