Robert Haas <robertmh...@gmail.com> writes:
> But now that I re-think about it, I guess what I'm confused about is
> this code here:
> if (ch >= 'A' && ch <= 'Z')
> ch += 'a' - 'A';
> else if (IS_HIGHBIT_SET(ch) && isupper(ch))
> ch = tolower(ch);
> result[i] = (char) ch;
The expected behavior there is that case-folding of non-ASCII characters
will occur in single-byte encodings but nothing will happen to
multi-byte characters. We are relying on isupper() to not return true
when presented with a character fragment in a multibyte locale.
regards, tom lane
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