Difference between revisions of "Utf8.charpos"
From GiderosMobile
(Created page with "__NOTOC__ '''Available since:''' Gideros 2016.06<br/> === Description === convert UTF-8 position to byte offset. if only offset is given, return byte offset of this UTF-8 char...") |
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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. | 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. | ||
<source lang="lua"> | <source lang="lua"> | ||
| − | (number) | + | (number) = utf8.charpos(s,charpos,offset) |
</source> | </source> | ||
| − | '''s | + | '''s''': (string) ''''''<br/> |
| − | '''charpos | + | '''charpos''': (number) '''optional'''<br/> |
| − | '''offset | + | '''offset''': (number) '''optional'''<br/> |
'''Returns''' (number) return byte offset of this UTF-8 char index<br/> | '''Returns''' (number) return byte offset of this UTF-8 char index<br/> | ||
Revision as of 11:17, 23 August 2018
Available since: Gideros 2016.06
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.
(number) = utf8.charpos(s,charpos,offset)
's: (string) '
charpos: (number) optional
offset: (number) optional
Returns (number) return byte offset of this UTF-8 char index
