NAME    [Toc]    [Back]

     isblank - blank-space character test

SYNOPSIS    [Toc]    [Back]

     #include <ctype.h>

     int
     isblank(int c);

DESCRIPTION    [Toc]    [Back]

     The isblank() function tests for  the  standard  blank-space
characters.
     The standard blank-space characters are the following:

           ` '    Space character.
                Horizontal tab.

     In  the  C locale, isblank() returns true only for the standard blank-space
     characters.

RETURN VALUES    [Toc]    [Back]

     The isblank() 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), iscntrl(3), isdigit(3),
isgraph(3),
     islower(3), isprint(3), ispunct(3), isspace(3),  isupper(3),
isxdigit(3),
     stdio(3), toascii(3), tolower(3), toupper(3), ascii(7)

CAVEATS    [Toc]    [Back]

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

OpenBSD     3.6                       September     14,      1993