isprint, iswprint, _isprint_l, _iswprint_l
Determine if an integer represents a printable character.
int isprint(
int c
);
int iswprint(
wint_t c
);
int _isprint_l(
int c,
_locale_t locale
);
int _iswprint_l(
wint_t c,
_locale_t locale
);
Parameters
c
Integer to test.locale
The locale to use.
Return Value
Each of these routines returns nonzero if c is a particular representation of a printable character. isprint returns a nonzero value if c is a printable character, including the space character (0x20 – 0x7E). iswprint returns a nonzero value if c is a printable wide character, including the space wide character. Each of these routines returns 0 if c does not satisfy the test condition.
The result of the test condition for these functions depends on the LC_CTYPE category setting of the locale; see setlocale for more information. The versions of these functions without the _l suffix use the current locale for any locale-dependent behavior; the versions with the _l suffix are identical except that they use the locale passed in instead. For more information, see Locale.
When used with a debug CRT library, isprint will display a CRT assert if passed a parameter that is not EOF or in the range of 0 through 0xFF. When used with a debug CRT library, isprint will use the parameter as an index into an array, with undefined results if the parameter is not EOF or in the range of 0 through 0xFF.
Generic-Text Routine Mappings
TCHAR.H routine |
_UNICODE & _MBCS not defined |
_MBCS defined |
_unicode defined |
|---|---|---|---|
_istprint |
isprint |
iswprint |
Requirements
Routine |
Required header |
|---|---|
isprint |
<ctype.h> |
iswprint |
<ctype.h> or <wchar.h> |
_isprint_l |
<ctype.h> |
_iswprint_l |
<ctype.h> or <wchar.h> |
For additional compatibility information, see Compatibility in the Introduction.
.NET Framework Equivalent
Not applicable. To call the standard C function, use PInvoke. For more information, see Platform Invoke Examples.