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Determines whether an integer represents a space character.
int isspace(
int c
);
int iswspace(
wint_t c
);
int _isspace_l(
int c,
_locale_t locale
);
int _iswspace_l(
wint_t c,
_locale_t locale
);
c
Integer to test.
locale
Locale to use.
Each of these routines returns nonzero if c
is a particular representation of a space character. isspace
returns a nonzero value if c
is a white-space character (0x09 - 0x0D or 0x20). The result of the test condition for the isspace
function depends on the LC_CTYPE
category setting of the locale. For more information, see setlocale
, _wsetlocale
. The versions of these functions that don't have the _l
suffix use the current locale for any locale-dependent behavior; the versions that do have the _l
suffix are identical except that they use the locale that's passed in instead. For more information, see Locale.
iswspace
returns a nonzero value if c
is a wide character that corresponds to a standard white-space character.
The behavior of isspace
and _isspace_l
is undefined if c
isn't EOF or in the range 0 through 0xFF, inclusive. When a debug CRT library is used and c
isn't one of these values, the functions raise an assertion.
TCHAR.H routine | _UNICODE and _MBCS not defined |
_MBCS defined |
_UNICODE defined |
---|---|---|---|
_istspace |
isspace |
_ismbcspace |
iswspace |
By default, this function's global state is scoped to the application. To change this behavior, see Global state in the CRT.
Routine | Required header |
---|---|
isspace |
<ctype.h> |
iswspace |
<ctype.h> or <wchar.h> |
_isspace_l |
<ctype.h> |
_iswspace_l |
<ctype.h> or <wchar.h> |
For more compatibility information, see Compatibility.