CJKV Information Processing, 2nd Edition

Character Sorting

|

605

combines the rst two macros. Quite oen you won’t care whether a kanji is in JIS Level

1 or 2 kanji, but rather if it is a kanji at all. Again, it is sucient to use only the rst byte

as input to this macro.

e next three macros:

#define ISHIRAGANA(A) (A == 4)

#define ISKATAKANA(A) (A == 5)

#define ISKANA(A) (ISHIRAGANA(A) || ISKATAKANA(A))

do the same as the rst three macros, but with kana. e rst two detect whether a char-

acter is a hiragana or katakana, and the last one combines them. Like before, only the rst

byte is used for this.

e last macro:

#define ISKANAKANJI(A) (ISKANA(A) || ISKANJI(A))

checks for a larger set of characters, kana and kanji.

Similar macros can be written to accommodate other languages, such as Korean (KS X

1001:2004):

#define ISJAMO(A) (A == 4)

#define ISHANGUL(A) (A >= 16 && A <= 40)

#define ISHANJA(A) (A >= 42 && A <= 93)

#define ISHANGULHANJA(A) (ISHANGUL(A) || ISHANJA(A))

and Chinese (GB 2312-80):

#define ISLEVEL1(A) (A >= 16 && A <= 55)

#define ISLEVEL2(A) (A >= 56 && A <= 87)

#define ISHANZI(A) (ISLEVEL1(A) || ISLEVEL2(A))

Writing such macro denitions can be carried to almost any extreme, and represents a

very useful tool in the hands of a C or C++ programmer. Of course, these macros could

have been implemented as C functions or written in yet other programming languages.

Character Sorting

You can sort English text in a multitude of ...