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Byte Classification

Each of these routines tests a specified byte of a multibyte character for satisfaction of a condition. Except where specified otherwise, the output value is affected by the setting of the LC_CTYPE category setting of the locale; see setlocale for more information. The versions of these functions without the _l suffix use the current locale for this locale-dependent behavior; the versions with the _l suffix are identical except that they use the locale parameter passed in instead.

NoteNote:

By definition, the ASCII characters between 0 and 127 are a subset of all multibyte-character sets. For example, the Japanese katakana character set includes ASCII as well as non-ASCII characters.

The predefined constants in the following table are defined in CTYPE.H.

Multibyte-Character Byte-Classification Routines

Routine

Byte Test Condition

.NET Framework equivalent

isleadbyte, _isleadbyte_l

Lead byte; test result depends on LC_CTYPE category setting of current locale

Not applicable, but see System::Globalization::CultureInfo

_ismbbalnum, _ismbbalnum_l

isalnum || _ismbbkalnum

Not applicable, but see System::Globalization::CultureInfo

_ismbbalpha, _ismbbalpha_l

isalpha || _ismbbkalnum

Not applicable, but see System::Globalization::CultureInfo

_ismbbgraph, _ismbbgraph_l

Same as _ismbbprint, but _ismbbgraph does not include the space character (0x20)

Not applicable, but see System::Globalization::CultureInfo

_ismbbkalnum, _ismbbkalnum_l

Non-ASCII text symbol other than punctuation. For example, in code page 932 only, _ismbbkalnum tests for katakana alphanumeric

Not applicable, but see System::Globalization::CultureInfo

_ismbbkana, _ismbbkana_l

Katakana (0xA1 – 0xDF), code page 932 only

Not applicable, but see System::Globalization::CultureInfo

_ismbbkprint, _ismbbkprint_l

Non-ASCII text or non-ASCII punctuation symbol. For example, in code page 932 only, _ismbbkprint tests for katakana alphanumeric or katakana punctuation (range: 0xA1 – 0xDF).

Not applicable, but see System::Globalization::CultureInfo

_ismbbkpunct, _ismbbkpunct_l

Non-ASCII punctuation. For example, in code page 932 only, _ismbbkpunct tests for katakana punctuation.

Not applicable, but see System::Globalization::CultureInfo

_ismbblead, _ismbblead_l

First byte of multibyte character. For example, in code page 932 only, valid ranges are 0x81 – 0x9F, 0xE0 – 0xFC.

Not applicable, but see System::Globalization::CultureInfo

_ismbbprint, _ismbbprint_l

isprint || _ismbbkprint. ismbbprint includes the space character (0x20)

Not applicable, but see System::Globalization::CultureInfo

_ismbbpunct, _ismbbpunct_l

ispunct || _ismbbkpunct

Not applicable, but see System::Globalization::CultureInfo

_ismbbtrail, _ismbbtrail_l

Second byte of multibyte character. For example, in code page 932 only, valid ranges are 0x40 – 0x7E, 0x80 – 0xEC.

Not applicable, but see System::Globalization::CultureInfo

_ismbslead, _ismbslead_l

Lead byte (in string context)

Not applicable, but see System::Globalization::CultureInfo

ismbstrail, _ismbstrail_l

Trail byte (in string context)

Not applicable, but see System::Globalization::CultureInfo

_mbbtype, _mbbtype_l

Return byte type based on previous byte

Not applicable, but see System::Globalization::CultureInfo

_mbsbtype, _mbsbtype_l

Return type of byte within string

Not applicable, but see System::Globalization::CultureInfo

mbsinit

Tracks the state of a multibyte character conversion.

Not applicable, but see System::Globalization::CultureInfo

The MB_LEN_MAX macro, defined in LIMITS.H, expands to the maximum length in bytes that any multibyte character can have. MB_CUR_MAX, defined in STDLIB.H, expands to the maximum length in bytes of any multibyte character in the current locale.

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