SDK Calls are game specific. You can't expect two libraries to have the same signatures for the functions. It is possible in some cases, but it is rare.
Here are the
CTerrorPlayer::OnVomitedUpon signatures for L4D1 that you requested.
Linux
PHP Code:
_ZN13CTerrorPlayer13OnVomitedUponEPS_bb
Windows
PHP Code:
\x83\xEC\x14\x53\x55\x56\x57\x8B\xF1\xE8\x2A\x2A\x2A\x2A