Converts all Unicode characters in the string that have a case
to uppercase. The exact manner that this is done depends
on the current locale, and may result in the number of
characters in the string increasing. (For instance, the
German ess-zet will be changed to SS.)
Parameters
str: string
a UTF-8 encoded string
len: number
length of str, in bytes, or -1 if str is nul-terminated.
Returns string
a newly allocated string, with all characters converted to uppercase.
Converts all Unicode characters in the string that have a case to uppercase. The exact manner that this is done depends on the current locale, and may result in the number of characters in the string increasing. (For instance, the German ess-zet will be changed to SS.)