NAME
isspace, isspace_l
— white-space character
test
LIBRARY
library “libc”
SYNOPSIS
#include
<ctype.h>
int
isspace(int
c);
int
isspace_l(int
c, locale_t
locale);
DESCRIPTION
Theisspace()
and isspace_l() functions test for white-space
characters. For any locale, this includes the following standard characters:
| ``\t'' | ``\n'' | ``\v'' | ``\f'' | ``\r'' | `` '' |
In the "C" locale,
isspace()
and isspace_l() return non-zero for these characters
only. The value of the argument must be representable as an
unsigned char or the value of
EOF.
The
isspace_l()
function takes an explicit locale argument, whereas
the isspace() function uses the current global or
per-thread locale.
RETURN VALUES
The isspace() and
isspace_l() functions return zero if the character
tests false and return non-zero if the character tests true.
COMPATIBILITY
The 4.4BSD extension of accepting
arguments outside of the range of the unsigned char
type in locales with large character sets is considered obsolete and may not
be supported in future releases. The iswspace() and
iswspace_l() functions should be used instead.
SEE ALSO
ctype(3), ctype_l(3), iswspace(3), iswspace_l(3), multibyte(3), xlocale(3), ascii(7)
STANDARDS
The isspace() function conforms to
ISO/IEC 9899:1990 (“ISO C90”).
The isspace_l() function conforms to
IEEE Std 1003.1-2008 (“POSIX.1”).