Utf8.charpos

Available since: Gideros 2016.06
Class: utf8

Description

convert UTF-8 position to byte offset. if only offset is given, return byte offset of this UTF-8 char index. if charpos and offset is given, a new charpos will calculate, by add/subtract UTF-8 char offset to current charpos. in all case, it return a new char position, and code point (a number) at this position. <syntaxhighlight lang="lua"> (number) = utf8.charpos(s,charpos,offset) </source>

Parameters

s: (string)
charpos: (number) optional
offset: (number) optional

Return values

Returns (number) return byte offset of this UTF-8 char index

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• Utf8
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• Utf8.offset
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• Utf8.reverse
• Utf8.sub
• Utf8.title
• Utf8.upper
• Utf8.width
• Utf8.widthindex

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