[Rd] [PATCH] Improve utf8clen and remove utf8_table4
sahil.kang at asilaycomputing.com
Sun Mar 19 07:31:57 CET 2017
Given a char `c' which should be the start byte of a utf8 character,
the utf8clen function returns the byte length of the utf8 character.
Before this patch, the utf8clen function would return either:
* 1 if `c' was an ascii character or a utf8 continuation byte
* An int in the range [2, 6] indicating the byte length of the utf8
With this patch, the utf8clen function will now return either:
* -1 if `c' is not a valid utf8 start byte
* The byte length of the utf8 character (the number of leading 1's,
I believe returning -1 for continuation bytes makes utf8clen less error
The utf8_table4 array is no longer needed and has been removed.
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