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


SEE ALSO

     ctype(3), 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 behavior is undefined.  See the CAVEATS section of
     ctype(3) for more details.

NetBSD 9.1                      April 17, 2008                      NetBSD 9.1