_ismbcalnum, _ismbcalnum_l, _ismbcalpha, _ismbcalpha_l, _ismbcdigit, _ismbcdigit_l
Checks whether a multibyte character is an alphanumeric, alpha, or digit character.
Important
This API cannot be used in applications that execute in the Windows Runtime. For more information, see CRT functions not supported with /ZW.
int _ismbcalnum
(
unsigned int c
);
int _ismbcalnum_l
(
unsigned int c,
_locale_t locale
);
int _ismbcalpha
(
unsigned int c
);
int _ismbcalpha_l
(
unsigned int c,
_locale_t locale
);
int _ismbcdigit
(
unsigned int c
);
int _ismbcdigit_l
(
unsigned int c,
_locale_t locale
);
Parameters
c
Character to be tested.locale
Locale to use.
Return Value
Each of these routines returns a nonzero value if the character satisfies the test condition or 0 if it does not. If c<= 255 and there is a corresponding _ismbb routine (for example, _ismbcalnum corresponds to _ismbbalnum), the result is the return value of the corresponding _ismbb routine.
Remarks
Each of these routines tests a given multibyte character for a given condition.
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.
Routine |
Test condition |
Code page 932 example |
|---|---|---|
_ismbcalnum,_ismbcalnum_l |
Alphanumeric |
Returns nonzero if and only if c is a single-byte representation of an ASCII English letter: See examples for _ismbcdigit and _ismbcalpha. |
_ismbcalpha,_ismbcalpha_l |
Alphabetic |
Returns nonzero if and only if c is a single-byte representation of an ASCII English letter: 0x41<=c<=0x5A or 0x61<=c<=0x7A; or a katakana letter: 0xA6<=c<=0xDF. |
_ismbcdigit,_ismbcdigit |
Digit |
Returns nonzero if and only if c is a single-byte representation of an ASCII digit: 0x30<=c<=0x39. |
Requirements
Routine |
Required header |
|---|---|
_ismbcalnum,_ismbcalnum_l |
<mbstring.h> |
_ismbcalpha,_ismbcalpha_l |
<mbstring.h> |
_ismbcdigit,_ismbcdigit_l |
<mbstring.h> |
For more compatibility information, see Compatibility.
.NET Framework Equivalent
For _ismbcalnum: Not applicable. To call the standard C function, use PInvoke. For more information, see Platform Invoke Examples.