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     Vertical tab.

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


RETURN VALUES

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

NetBSD 7.1_STABLE               April 17, 2008               NetBSD 7.1_STABLE