Character Manipulation Function

int isgraph(int c);

int iswgraph(wint_t c);

int _ismbcgraph(unsigned int c);

int _istgraph(_TINT c);

Internationalization (I18n) Function Overview

The function isgraph tests for a printable character, with the exception of the space character, using the LC_CTYPE category setting of the current locale.

iswgraph is the wide character equivalent of isgraph, testing the wide character c.

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

_istgraph is the Windows-only Generic version of the function; with the _MBCS or _UNICODE compiler flags determining its mapping to either _ismbcgraph or iswgraph.

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 isgraph. Instead, convert the character c to a wide character and call iswgraph.

Prior to calling iswdigit 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 iswdigit test is independent of locale.

The _ismbcgraph 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 iswgraph
ANSI UTF-16	iswgraph
Microsoft Windows MBCS	_ismbcgraph
Microsoft Windows Unicode	iswgraph
Microsoft Windows Generic	_istgraph

Character Manipulation Functions