Using ctrl+v U in insert mode, you can enter Unicode characters by code point.
UTF-8 can only encode up to U+7FFFFFFF. Entering any code point up to that
value works fine, but if if you type "ctrl+v U 81234567" for example, you get
"<t_" followed by some other bytes instead of the requested code point.
I don't know where to submit bug fixes but since this one is only two lines
long, I'll post it here. In edit.c you can replace this line:
if ((unicode == 'u' && i >= 4) || (unicode == 'U' && i >= 8))
with this:
if ((unicode == 'u' && i >= 4) ||
(unicode == 'U' && (i == 7 && cc > 0x7FFFFFF || i >= 8)))
This way vim stops reading input after 7 hex digits if an eighth digit would
make the code point higher than what UTF-8 can encode.
Phil Carter
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