Store a list of industries per industry type. This allows industry generation checks which only consider a specific industry type to check a reduced set of industries, leading to a potential performance increase.
This also removes the need to track industry type counts as well.
Ship and RoadVehicle path caches use a std::deque, which is quite memory hungry, especially for RoadVehicle which has two.
std::deque was used to be able to push/pop from either end.
Change to use a single std::vector each, which is now push/popped from the back.
This allows water tiles which cannot flood any further to not even try to flood.
On a large map with lots of water tiles this can noticeably reduce game loop processing time.
Mostly ported from JGRPP.
Build the list of railtype conversions at the same time as testing if conversion is needed.
This avoids having two similar loops which need to compare the same things.
Split AfterLoadVehicles into two functions.
Vehicle cache init and other functionality requiring an upgraded and
valid map is now performed later in the load process.
* Codechange: Add AssignBit function to assign the value of a single bit
* Codechange: Replace various uses of SB with AssignBit
* Codechange: Replace various uses of SB with a constant with SetBit
Standardises how the class index is stored in the spec, instead of relying ot the Spec structs having the same members.
This allows retrieving class_index and index without searching or using pointer arithmetic.
'cls_id' is renamed to 'class_index' to make it clearer that it is an index rather than the multichar label of the class.
This 'nice' structure was left around from #8258 just in case it might be used again.
Spoiler alert: it hasn't.
This removes manual memory management. And otherwise unused and untested code.
SlCalcConvMemLen(), SlCalcConfFileLen() and CalcOldVarLen() follow a pattern of looking up part of a value in an array.
These function returns the size of bytes of a variable type, but is not very clear. Replace with a switch block instead.
Removes lengthof, array indices, and magic numbers.
Conversion to set default group livery is in the wrong place (not in `AfterLoadGame()`), however it is not necessary any more as `AfterLoadGame()` always calls the function `UpdateCompanyLiveries()` which will do the same thing.
Industry accepted/produced was trimmed too early for original and pre-SLV_78 saves, as cargo type was not stored per slot so all slots look invalid to the trim function.
* Codechange: Replace C-style casts to size_t with static_cast.
This touches only simple value-type casts.
* Codechange: Replace static_cast<size_t>(-1) with SIZE_MAX
Co-authored-by: Rubidium <rubidium@openttd.org>
