21 lines
1,013 B
Text
21 lines
1,013 B
Text
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This is a module to provide equivalent feature as wcwidth(3) and
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wcswidth(3). This also provides mblen(3) equivalent subroutine.
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mbwidth() and mbswidth() are provided subroutines corresponding
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wcwidth(3) and wcswidth(3) in C language. The prefix "mb" expresses
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that they handles "multibyte character" in C meaning, i.e., character
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encoding specified by LC_CTYPE locale.
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These subroutines are used to get the width of characters on terminal.
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Though most characters have width of 1, there are exceptions.
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Fullwidth characters are characters with width of 2. Most of east
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Asian characters such as Hiragana, Katakana, Hangul, Han Ideogram
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are fullwidth. Combining characters are characters with width of 0.
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Unicode has many combining characters like diacritical marks. There
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are languages which need combining characters such as Thai and
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Vietnamese.
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Thus, if you would like to format international texts on terminal,
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you will have to be aware of variation of character width and will
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want to use this module.
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