_setmbcp

Sets a new multibyte code page.

Syntax

int _setmbcp(
   int codepage
);

Parameters

codepage
New code page setting for locale-independent multibyte routines.

Return value

Returns 0 if the code page is set successfully. If an invalid code page value is supplied for codepage, returns -1 and the code page setting is unchanged. Sets errno to EINVAL if a memory allocation failure occurs.

Remarks

The _setmbcp function specifies a new multibyte code page. By default, the run-time system automatically sets the multibyte code page to the system-default ANSI code page. The multibyte code page setting affects all multibyte routines that aren't locale dependent. However, it's possible to instruct _setmbcp to use the code page defined for the current locale (see the following list of manifest constants and associated behavior results). For a list of the multibyte routines that are dependent on the locale code page rather than the multibyte code page, see Interpretation of multibyte-character sequences.

The codepage argument can be set to any of the following values:

• _MB_CP_ANSI Use ANSI code page obtained from operating system at program startup.

• _MB_CP_LOCALE Use the current locale's code page obtained from a previous call to setlocale.

• _MB_CP_OEM Use OEM code page obtained from operating system at program startup.

• _MB_CP_SBCS Use single-byte code page. When the code page is set to _MB_CP_SBCS, a routine such as _ismbblead always returns false.

• _MB_CP_UTF8 Use UTF-8. When the code page is set to _MB_CP_UTF8, a routine such as _ismbblead always returns false.

• Any other valid code page value, regardless of whether the value is an ANSI, OEM, or other operating-system-supported code page (except UTF-7, which isn't supported).

By default, this function's global state is scoped to the application. To change this behavior, see Global state in the CRT.

Requirements

For more compatibility information, see Compatibility.

See also

_getmbcp
setlocale, _wsetlocale