Utf8.charpos

Available since: Gideros 2016.06
Class: utf8

Description

Converts UTF-8 position to byte offset.

(number) = utf8.charpos(s,charpos,offset)

If only offset is given, returns 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 cases, it returns a new char position, and code point (a number) at this position.

Parameters

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

Return values

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

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• Utf8
• Utf8.byte
• Utf8.char
• Utf8.charpattern
• Utf8.charpos
• Utf8.codepoint
• Utf8.codes
• Utf8.escape
• Utf8.find
• Utf8.fold
• Utf8.gmatch
• Utf8.gsub
• Utf8.insert
• Utf8.len
• Utf8.lower
• Utf8.match
• Utf8.ncasecmp
• Utf8.next
• Utf8.offset
• Utf8.remove
• Utf8.reverse
• Utf8.sub
• Utf8.title
• Utf8.upper
• Utf8.width
• Utf8.widthindex

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