isblank(3) - NetBSD Manual Pages

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ISBLANK(3)              NetBSD Library Functions Manual             ISBLANK(3)


NAME

     isblank -- blank-space character test


LIBRARY

     Standard C Library (libc, -lc)


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 and returns
     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)


CAVEATS

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

NetBSD 3.0.1                  September 14, 1993                  NetBSD 3.0.1