This is a rather long commit, because it refactors lots of the event
code from pointer to value semantics: pointers to entries in an
std::vector<> are not stable, so better use indexes.
To step through the event-list at diven time stamps, add *_loop classes,
which encapsulate state that had to be manually handled before by
the caller. I'm not happy about the interface, but it tries to
mirror the one we had before.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
Use more C++ style memory management for plot_info: Use std::vector
for array data. Return the plot_info instead of filling an output
parameter. Add a constructor/destructor pair so that the caller
isn't bothered with memory management.
The bulk of the commit is replacement of pointers with references,
which is kind of gratuitous. But I started and then went on...
Default initializiation of gas_pressures made it necessary to convert
gas.c to c++, though with minimal changes to the code.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
