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Important This document may not represent best practices for current development, links to downloads and other resources may no longer be valid. Current recommended version can be found here.

isgraph, iswgraph, _isgraph_l, _iswgraph_l

Determine if an integer represents a graphical character.

int isgraph(
   int c 
);
int iswgraph(
   wint_t c 
);
int _isgraph_l(
   int c,
   _locale_t locale
);
int _iswgraph_l(
   wint_t c,
   _locale_t locale
);

c

Integer to test.

Each of these routines returns nonzero if c is a particular representation of a printable character other than a space. isgraph returns a nonzero value if c is a printable character other than a space. iswgraph returns a nonzero value if c is a printable wide character other than a wide character space. Each of these routines returns 0 if c does not satisfy the test condition.

When used with a debug CRT library, isgraph 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, isgraph 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.

The versions of these functions with the _l suffix are identical except that they use the locale passed in instead of the current locale for their locale-dependent behavior. For more information, see Locale.

Generic-Text Routine Mappings

TCHAR.H routine

_UNICODE & _MBCS not defined

_MBCS defined

_UNICODE defined

_istgraph

isgraph

_ismbcgraph

iswgraph

_istgraph_l

_isgraph_l

_ismbcgraph_l

_iswgraph_l

Routine

Required header

isgraph

<ctype.h>

iswgraph

<ctype.h> or <wchar.h>

_isgraph_l

<ctype.h>

_iswgraph_l

<ctype.h> or <wchar.h>

For additional compatibility information, see Compatibility in the Introduction.

Not applicable. To call the standard C function, use PInvoke. For more information, see Platform Invoke Examples.

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