DragonFly On-Line Manual Pages

ISBLANK(3)            DragonFly Library Functions Manual            ISBLANK(3)

NAME
     isblank, isblank_l -- 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 locale);

DESCRIPTION
     The isblank() and isblank_l() functions test 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
     characters 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() and isblank_l() functions return 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() and
     iswblank_l() function should be used instead.

SEE ALSO
     ctype(3), iswblank(3), iswblank_l(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'').

DragonFly 4.3                  December 25, 2013                 DragonFly 4.3