NAME    [Toc]    [Back]

     isblank -- space or tab character test

LIBRARY    [Toc]    [Back]

     Standard C Library (libc, -lc)

SYNOPSIS    [Toc]    [Back]

     #include <ctype.h>

     int
     isblank(int c);

DESCRIPTION    [Toc]    [Back]

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

     ``\t''	 `` ''

     In the "C" locale isblank() successful test is limited to this characters
     only.  For single C chars locales (see multibyte(3)) the value of the
     argument is representable as an unsigned char or the value of EOF.

COMPATIBILITY    [Toc]    [Back]

     Although isblank() accepts arguments outside of the range of the unsigned
     char type in locales with large character sets, this is a 4.4BSD extension
 and the iswblank() function should be used instead for maximum
     portability.

RETURN VALUES    [Toc]    [Back]

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

SEE ALSO    [Toc]    [Back]

     ctype(3), iswblank(3), multibyte(3), ascii(7)

STANDARDS    [Toc]    [Back]

     The isblank() function conforms to ISO/IEC 9899:1999 (``ISO C99'').


FreeBSD 5.2.1			October 6, 2002 		 FreeBSD 5.2.1