isspace(3) - NetBSD Manual Pages

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ISSPACE(3)              NetBSD Library Functions Manual             ISSPACE(3)


NAME

     isspace -- white-space character test


LIBRARY

     Standard C Library (libc, -lc)


SYNOPSIS

     #include <ctype.h>

     int
     isspace(int c);


DESCRIPTION

     The isspace() function tests for the standard white-space characters for
     which isalnum(3) is false.  The standard white-space characters are the
     following:

           ` '    Space character.
           \f     Form feed.
           \n     New-line.
           \r     Carriage return.
           \t     Horizontal tab.
           \v     And vertical tab.

     In the ``C'' locale, isspace() returns true only for the standard white-
     space characters.


RETURN VALUES

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


STANDARDS

     The isspace() function conforms to ANSI X3.159-1989 (``ANSI C89'').


CAVEATS

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

NetBSD 3.0.2                     July 31, 1991                    NetBSD 3.0.2