Character Manipulation Function

int isprint(int c);

int iswprint(wint_t c);

int _ismbcprint(unsigned int c);

int _istprint(_TINT c);

Internationalization (I18n) Function Overview

The function isprint tests for a printable character, including the space character, using the LC_CTYPE category setting of the current locale.

iswprint is the wide character equivalent of isprint, testing the wide character c.

Supported only on Windows platforms, _ismbcprint is the multibyte equivalent, treating c as a multibyte character and calling _ismbbprint.

_istprint is the Windows-only Generic version of the function; with the _MBCS or _UNICODE compiler flags determining its mapping to either _ismbcprint or iswprint.

I18n Issues

Use the appropriate version of the function as required for internationalization support, noting the following:

On ANSI platforms, there is no multibyte version of isprint. Instead, convert the character c to a wide character and call iswprint.

Prior to calling iswprint on ANSI platforms, ensure that the locale is set correctly, since the result of the test condition depends on the locale's LC_CTYPE category setting. On Windows platforms, the iswprint test is independent of locale.

The _ismbcprint function depends on the multibyte code page in effect. By default, the multibyte code page is set to the system-default ANSI code page obtained from the operating system at program startup. Use _getmbcp and _setmbcp to query or change the current multibyte code page, respectively.

Recommended Replacements*

ANSI UTF-8	convert and call iswprint
ANSI UTF-16	iswprint
Microsoft Windows MBCS	_ismbcprint
Microsoft Windows Unicode	iswprint
Microsoft Windows Generic	_istprint

Character Manipulation Functions