ISBLANK(3)                OpenBSD Programmer's Manual               ISBLANK(3)

NAME
     isblank - blank-space character test



SYNOPSIS
     #include <ctype.h>

     int
     isblank(int c);

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

           ` '    Space character.
           \t     Horizontal tab.

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

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

SEE ALSO
     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)

OpenBSD 2.6                   September 14, 1993                             1